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• What is Inversion of control and why we need it?

  - by Jalpesh P. Vadgama

  Most of programmer need inversion of control pattern in today’s complex real time application world. So I have decided to write a blog post about it. This blog post will explain what is Inversion of control and why we need it. We are going to take a real world example so it would be better to understand. The problem- Why we need inversion of control? Before giving definition of Inversion of control let’s take a simple real word example to see why we need inversion of control. Please have look on the following code. public class class1 { private class2 _class2; public class1() { _class2=new class2(); } } public class class2 { //Some implementation of class2 } I have two classes “Class1” and “Class2”.  If you see the code in that I have created a instance of class2 class in the class1 class constructor. So the “class1” class is dependent on “class2”. I think that is the biggest issue in real world scenario as if we change the “class2” class then we might need to change the “class1” class also. Here there is one type of dependency between this two classes that is called Tight Coupling. Tight coupling will have lots of problem in real world applications as things are tends to be change in future so we have to change all the tight couple classes that are dependent of each other. To avoid this kind of issue we need Inversion of control. What is Inversion of Control? According to the wikipedia following is a definition of Inversion of control. “In software engineering, Inversion of Control (IoC) is an object-oriented programming practice where the object coupling is bound at run time by an assembler object and is typically not known at compile time using static analysis.” So if you read the it carefully it says that we should have object coupling at run time not compile time where it know what object it will create, what method it will call or what feature it will going to use for that. We need to use same classes in such way so that it will not tight couple with each other. There are multiple way to implement Inversion of control. You can refer wikipedia link for knowing multiple ways of implementing Inversion of control. In future posts we are going to see all the different way of implementing Inversion of control.

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• Tips on Migrating from AquaLogic .NET Accelerator to WebCenter WSRP Producer for .NET

  - by user647124

  This year I embarked on a journey to migrate a group of ASP.NET web applications developed to integrate with WebLogic Portal 9.2 via the AquaLogic® Interaction .NET Application Accelerator 1.0 to instead use the Oracle WebCenter WSRP Producer for .NET and integrated with WebLogic Portal 10.3.4. It has been a very winding path and this blog entry is intended to share both the lessons learned and relevant approaches that led to those learnings. Like most journeys of discovery, it was not a direct path, and there are notes to let you know when it is practical to skip a section if you are in a hurry to get from here to there. For the Curious From the perspective of necessity, this section would be better at the end. If it were there, though, it would probably be read by far fewer people, including those that are actually interested in these types of sections. Those in a hurry may skip past and be none the worst for it in dealing with the hands-on bits of performing a migration from .NET Accelerator to WSRP Producer. For others who want to talk about why they did what they did after they did it, or just want to know for themselves, enjoy. A Brief (and edited) History of the WSRP for .NET Technologies (as Relevant to the this Post) Note: This section is for those who are curious about why the migration path is not as simple as many other Oracle technologies. You can skip this section in its entirety and still be just as competent in performing a migration as if you had read it. The currently deployed architecture that was to be migrated and upgraded achieved initial integration between .NET and J2EE over the WSRP protocol through the use of The AquaLogic Interaction .NET Application Accelerator. The .NET Accelerator allowed the applications that were written in ASP.NET and deployed on a Microsoft Internet Information Server (IIS) to interact with a WebLogic Portal application deployed on a WebLogic (J2EE application) Server (both version 9.2, the state of the art at the time of its creation). At the time this architectural decision for the application was made, both the AquaLogic and WebLogic brands were owned by BEA Systems. The AquaLogic brand included products acquired by BEA through the acquisition of Plumtree, whose flagship product was a portal platform available in both J2EE and .NET versions. As part of this dual technology support an adaptor was created to facilitate the use of WSRP as a communication protocol where customers wished to integrate components from both versions of the Plumtree portal. The adapter evolved over several product generations to include a broad array of both standard and proprietary WSRP integration capabilities. Later, BEA Systems was acquired by Oracle. Over the course of several years Oracle has acquired a large number of portal applications and has taken the strategic direction to migrate users of these myriad (and formerly competitive) products to the Oracle WebCenter technology stack. As part of Oracle’s strategic technology roadmap, older portal products are being schedule for end of life, including the portal products that were part of the BEA acquisition. The .NET Accelerator has been modified over a very long period of time with features driven by users of that product and developed under three different vendors (each a direct competitor in the same solution space prior to merger). The Oracle WebCenter WSRP Producer for .NET was introduced much more recently with the key objective to specifically address the needs of the WebCenter customers developing solutions accessible through both J2EE and .NET platforms utilizing the WSRP specifications. The Oracle Product Development Team also provides these insights on the drivers for developing the WSRP Producer: ***************************************** Support for ASP.NET AJAX. Controls using the ASP.NET AJAX script manager do not function properly in the Application Accelerator for .NET. Support 2 way SSL in WLP. This was not possible with the proxy/bridge set up in the existing Application Accelerator for .NET. Allow developers to code portlets (Web Parts) using the .NET framework rather than a proprietary framework. Developers had to use the Application Accelerator for .NET plug-ins to Visual Studio to manage preferences and profile data. This is now replaced with the .NET Framework Personalization (for preferences) and Profile providers. The WSRP Producer for .NET was created as a new way of developing .NET portlets. It was never designed to be an upgrade path for the Application Accelerator for .NET. .NET developers would create new .NET portlets with the WSRP Producer for .NET and leave any existing .NET portlets running in the Application Accelerator for .NET. ***************************************** The advantage to creating a new solution for WSRP is a product that is far easier for Oracle to maintain and support which in turn improves quality, reliability and maintainability for their customers. No changes to J2EE applications consuming the WSRP portlets previously rendered by the.NET Accelerator is required to migrate from the Aqualogic WSRP solution. For some customers using the .NET Accelerator the challenge is adapting their current .NET applications to work with the WSRP Producer (or any other WSRP adapter as they are proprietary by nature). Part of this adaptation is the need to deploy the .NET applications as a child to the WSRP producer web application as root. Differences between .NET Accelerator and WSRP Producer Note: This section is for those who are curious about why the migration is not as pluggable as something such as changing security providers in WebLogic Server. You can skip this section in its entirety and still be just as competent in performing a migration as if you had read it. The basic terminology used to describe the participating applications in a WSRP environment are the same when applied to either the .NET Accelerator or the WSRP Producer: Producer and Consumer. In both cases the .NET application serves as what is referred to as a WSRP environment as the Producer. The difference lies in how the two adapters create the WSRP translation of the .NET application. The .NET Accelerator, as the name implies, is meant to serve as a quick way of adding WSRP capability to a .NET application. As such, at a high level, the .NET Accelerator behaves as a proxy for requests between the .NET application and the WSRP Consumer. A WSRP request is sent from the consumer to the .NET Accelerator, the.NET Accelerator transforms this request into an ASP.NET request, receives the response, then transforms the response into a WSRP response. The .NET Accelerator is deployed as a stand-alone application on IIS. The WSRP Producer is deployed as a parent application on IIS and all ASP.NET modules that will be made available over WSRP are deployed as children of the WSRP Producer application. In this manner, the WSRP Producer acts more as a Request Filter than a proxy in the WSRP transactions between Producer and Consumer. Highly Recommended Enabling Logging Note: You can skip this section now, but you will most likely want to come back to it later, so why not just read it now? Logging is very helpful in tracking down the causes of any anomalies during testing of migrated portlets. To enable the WSRP Producer logging, update the Application_Start method in the Global.asax.cs for your .NET application by adding log4net.Config.XmlConfigurator.Configure(); IIS logs will usually (in a standard configuration) be in a sub folder under C:\WINDOWS\system32\LogFiles\W3SVC. WSRP Producer logs will be found at C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdefault\Logs\WSRPProducer.log InputTrace.webinfo and OutputTrace.webinfo are located under C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdefault and can be useful in debugging issues related to markup transformations. Things You Must Do Merge Web.Config Note: If you have been skipping all the sections that you can, now is the time to stop and pay attention J Because the existing .NET application will become a sub-application to the WSRP Producer, you will want to merge required settings from the existing Web.Config to the one in the WSRP Producer. Use the WSRP Producer Master Page The Master Page installed for the WSRP Producer provides common, hiddenform fields and JavaScripts to facilitate portlet instance management and display configuration when the child page is being rendered over WSRP. You add the Master Page by including it in the <@ Page declaration with MasterPageFile="~/portlets/Resources/MasterPages/WSRP.Master" . You then replace: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" > <HTML> <HEAD> With <asp:Content ID="ContentHead1" ContentPlaceHolderID="wsrphead" Runat="Server"> And </HEAD> <body> <form id="theForm" method="post" runat="server"> With </asp:Content> <asp:Content ID="ContentBody1" ContentPlaceHolderID="Main" Runat="Server"> And finally </form> </body> </HTML> With </asp:Content> In the event you already use Master Pages, adapt your existing Master Pages to be sub masters. See Nested ASP.NET Master Pages for a detailed reference of how to do this. It Happened to Me, It Might Happen to You…Or Not Watch for Use of Session or Request in OnInit In the event the .NET application being modified has pages developed to assume the user has been authenticated in an earlier page request there may be direct or indirect references in the OnInit method to request or session objects that may not have been created yet. This will vary from application to application, so the recommended approach is to test first. If there is an issue with a page running as a WSRP portlet then check for potential references in the OnInit method (including references by methods called within OnInit) to session or request objects. If there are, the simplest solution is to create a new method and then call that method once the necessary object(s) is fully available. I find doing this at the start of the Page_Load method to be the simplest solution. Case Sensitivity .NET languages are not case sensitive, but Java is. This means it is possible to have many variations of SRC= and src= or .JPG and .jpg. The preferred solution is to make these mark up instances all lower case in your .NET application. This will allow the default Rewriter rules in wsrp-producer.xml to work as is. If this is not practical, then make duplicates of any rules where an issue is occurring due to upper or mixed case usage in the .NET application markup and match the case in use with the duplicate rule. For example: <RewriterRule> <LookFor>(href=\"([^\"]+)</LookFor> <ChangeToAbsolute>true</ChangeToAbsolute> <ApplyTo>.axd,.css</ApplyTo> <MakeResource>true</MakeResource> </RewriterRule> May need to be duplicated as: <RewriterRule> <LookFor>(HREF=\"([^\"]+)</LookFor> <ChangeToAbsolute>true</ChangeToAbsolute> <ApplyTo>.axd,.css</ApplyTo> <MakeResource>true</MakeResource> </RewriterRule> While it is possible to write a regular expression that will handle mixed case usage, it would be long and strenous to test and maintain, so the recommendation is to use duplicate rules. Is it Still Relative? Some .NET applications base relative paths with a fixed root location. With the introduction of the WSRP Producer, the root has moved up one level. References to ~/ will need to be updated to ~/portlets and many ../ paths will need another ../ in front. I Can See You But I Can’t Find You This issue was first discovered while debugging modules with code that referenced the form on a page from the code-behind by name and/or id. The initial error presented itself as run-time error that was difficult to interpret over WSRP but seemed clear when run as straight ASP.NET as it indicated that the object with the form name did not exist. Since the form name was no longer valid after implementing the WSRP Master Page, the likely fix seemed to simply update the references in the code. However, as the WSRP Master Page is external to the code, a compile time error resulted: Error      155         The name 'form1' does not exist in the current context                C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdefault\portlets\legacywebsite\module\Screens \Reporting.aspx.cs                51           52           legacywebsite.module Much hair-pulling research later it was discovered that it was the use of the FindControl method causing the issue. FindControl doesn’t work quite as expected once a Master Page has been introduced as the controls become embedded in controls, require a recursion to find them that is not part of the FindControl method. In code where the page form is referenced by name, there are two steps to the solution. First, the form needs to be referenced in code generically with Page.Form. For example, this: ToggleControl ctrl = new ToggleControl(frmManualEntry, FunctionLibrary.ParseArrayLst(userObj.Roles)); Becomes this: ToggleControl ctrl = new ToggleControl(Page.Form, FunctionLibrary.ParseArrayLst(userObj.Roles)); Generally the form id is referenced in most ASP.NET applications as a path to a control on the form. To reach the control once a MasterPage has been added requires an additional method to recurse through the controls collections within the form and find the control ID. The following method (found at Rick Strahl's Web Log) corrects this very nicely: public static Control FindControlRecursive(Control Root, string Id) { if (Root.ID == Id) return Root; foreach (Control Ctl in Root.Controls) { Control FoundCtl = FindControlRecursive(Ctl, Id); if (FoundCtl != null) return FoundCtl; } return null; } Where the form name is not referenced, simply using the FindControlRecursive method in place of FindControl will be all that is necessary. Following the second part of the example referenced earlier, the method called with Page.Form changes its value extraction code block from this: Label lblErrMsg = (Label)frmRef.FindControl("lblBRMsg" To this: Label lblErrMsg = (Label) FunctionLibrary.FindControlRecursive(frmRef, "lblBRMsg" The Master That Won’t Step Aside In most migrations it is preferable to make as few changes as possible. In one case I ran across an existing Master Page that would not function as a sub-Master Page. While it would probably have been educational to trace down why, the expedient process of updating it to take the place of the WSRP Master Page is the route I took. The changes are highlighted below: … <asp:ContentPlaceHolder ID="wsrphead" runat="server"></asp:ContentPlaceHolder> </head> <body leftMargin="0" topMargin="0"> <form id="TheForm" runat="server"> <input type="hidden" name="key" id="key" value="" /> <input type="hidden" name="formactionurl" id="formactionurl" value="" /> <input type="hidden" name="handle" id="handle" value="" /> <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true" > </asp:ScriptManager> This approach did not work for all existing Master Pages, but fortunately all of the other existing Master Pages I have run across worked fine as a sub-Master to the WSRP Master Page. Moving On In Enterprise Portals, even after you get everything working, the work is not finished. Next you need to get it where everyone will work with it. Migration Planning Providing that the server where IIS is running is adequately sized, it is possible to run both the .NET Accelerator and the WSRP Producer on the same server during the upgrade process. The upgrade can be performed incrementally, i.e., one portlet at a time, if server administration processes support it. Those processes would include the ability to manage a second producer in the consuming portal and to change over individual portlet instances from one provider to the other. If processes or requirements demand that all portlets be cut over at the same time, it needs to be determined if this cut over should include a new producer, updating all of the portlets in the consumer, or if the WSRP Producer portlet configuration must maintain the naming conventions used by the .NET Accelerator and simply change the WSRP end point configured in the consumer. In some enterprises it may even be necessary to maintain the same WSDL end point, at which point the IIS configuration will be where the updates occur. The downside to such a requirement is that it makes rolling back very difficult, should the need arise. Location, Location, Location Not everyone wants the web application to have the descriptively obvious wsrpdefault location, or needs to create a second WSRP site on the same server. The instructions below are from the product team and, while targeted towards making a second site, will work for creating a site with a different name and then remove the old site. You can also change just the name in IIS. Manually Creating a WSRP Producer Site Instructions (NOTE: all executables used are the same ones used by the installer and “wsrpdev” will be the name of the new instance): 1. Copy C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdefault to C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdev. 2. Bring up a command window as an administrator 3. Run C:\Oracle\Middleware\WSRPProducerForDotNet\uninstall_resources\IISAppAccelSiteCreator.exe install WSRPProducers wsrpdev "C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdev" 8678 2.0.50727 4. Run C:\Oracle\Middleware\WSRPProducerForDotNet\uninstall_resources\PermManage.exe add FileSystem C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdev "NETWORK SERVICE" 3 1 5. Run C:\Oracle\Middleware\WSRPProducerForDotNet\uninstall_resources\PermManage.exe add FileSystem C:\Oracle\Middleware\WSRPProducerForDotNet\wsrpdev EVERYONE 1 1 6. Open up C:\Oracle\Middleware\WSRPProducerForDotNet\wsdl\1.0\WSRPService.wsdl and replace wsrpdefault with wsrpdev 7. Open up C:\Oracle\Middleware\WSRPProducerForDotNet\wsdl\2.0\WSRPService.wsdl and replace wsrpdefault with wsrpdev Tests: 1. Bring up a browser on the host itself and go to http://localhost:8678/wsrpdev/wsdl/1.0/WSRPService.wsdl and make sure that the URLs in the XML returned include the wsrpdev changes you made in step 6. 2. Bring up a browser on the host itself and see if the default sample comes up: http://localhost:8678/wsrpdev/portlets/ASPNET_AJAX_sample/default.aspx 3. Register the producer in WLP and test the portlet. Changing the Port used by WSRP Producer The pre-configured port for the WSRP Producer is 8678. You can change this port by updating both the IIS configuration and C:\Oracle\Middleware\WSRPProducerForDotNet\[WSRP_APP_NAME]\wsdl\1.0\WSRPService.wsdl. Do You Need to Migrate? Oracle Premier Support ended in November of 2010 for AquaLogic Interaction .NET Application Accelerator 1.x and Extended Support ends in November 2012 (see http://www.oracle.com/us/support/lifetime-support/lifetime-support-software-342730.html for other related dates). This means that integration with products released after November of 2010 is not supported. If having such support is the policy within your enterprise, you do indeed need to migrate. If changes in your enterprise cause your current solution with the .NET Accelerator to no longer function properly, you may need to migrate. Migration is a choice, and if the goals of your enterprise are to take full advantage of newer technologies then migration is certainly one activity you should be planning for.

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• Ghost Records, Backups, and Database Compression…With a Pinch of Security Considerations

  - by Argenis

    Today Jeffrey Langdon (@jlangdon) posed on #SQLHelp the following questions: So I set to answer his question, and I said to myself: “Hey, I haven’t blogged in a while, how about I blog about this particular topic?”. Thus, this post was born. (If you have never heard of Ghost Records and/or the Ghost Cleanup Task, go see this blog post by Paul Randal) 1) Do ghost records get copied over in a backup? If you guessed yes, you guessed right. The backup process in SQL Server takes all data as it is on disk – it doesn’t crack the pages open to selectively pick which slots have actual data and which ones do not. The whole page is backed up, regardless of its contents. Even if ghost cleanup has run and processed the ghost records, the slots are not overwritten immediately, but rather until another DML operation comes along and uses them. As a matter of fact, all of the allocated space for a database will be included in a full backup. So, this poses a bit of a security/compliance problem for some of you DBA folk: if you want to take a full backup of a database after you’ve purged sensitive data, you should rebuild all of your indexes (with FILLFACTOR set to 100%). But the empty space on your data file(s) might still contain sensitive data! A SHRINKFILE might help get rid of that (not so) empty space, but that might not be the end of your troubles. You might _STILL_ have (not so) empty space on your files! One approach that you can follow is to export all of the data on your database to another SQL Server instance that does NOT have Instant File Initialization enabled. This can be a tedious and time-consuming process, though. So you have to weigh in your options and see what makes sense for you. Snapshot Replication is another idea that comes to mind. 2) Does Compression get rid of ghost records (2008)? The answer to this is no. The Ghost Records/Ghost Cleanup Task mechanism is alive and well on compressed tables and indexes. You can prove this running a simple script: CREATE DATABASE GhostRecordsTest GO USE GhostRecordsTest GO CREATE TABLE myTable (myPrimaryKey int IDENTITY(1,1) PRIMARY KEY CLUSTERED,                       myWideColumn varchar(1000) NOT NULL DEFAULT 'Default string value')                         ALTER TABLE myTable REBUILD PARTITION = ALL WITH (DATA_COMPRESSION = PAGE) GO INSERT INTO myTable DEFAULT VALUES GO 10 DELETE myTable WHERE myPrimaryKey % 2 = 0 DBCC TRACEON(2514) DBCC CHECKTABLE(myTable) TraceFlag 2514 will make DBCC CHECKTABLE give you an extra tidbit of information on its output. For the above script: “Ghost Record count = 5” Until next time,   -Argenis

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• Ancillary Objects: Separate Debug ELF Files For Solaris

  - by Ali Bahrami

  We introduced a new object ELF object type in Solaris 11 Update 1 called the Ancillary Object. This posting describes them, using material originally written during their development, the PSARC arc case, and the Solaris Linker and Libraries Manual. ELF objects contain allocable sections, which are mapped into memory at runtime, and non-allocable sections, which are present in the file for use by debuggers and observability tools, but which are not mapped or used at runtime. Typically, all of these sections exist within a single object file. Ancillary objects allow them to instead go into a separate file. There are different reasons given for wanting such a feature. One can debate whether the added complexity is worth the benefit, and in most cases it is not. However, one important case stands out — customers with very large 32-bit objects who are not ready or able to make the transition to 64-bits. We have customers who build extremely large 32-bit objects. Historically, the debug sections in these objects have used the stabs format, which is limited, but relatively compact. In recent years, the industry has transitioned to the powerful but verbose DWARF standard. In some cases, the size of these debug sections is large enough to push the total object file size past the fundamental 4GB limit for 32-bit ELF object files. The best, and ultimately only, solution to overly large objects is to transition to 64-bits. However, consider environments where: Hundreds of users may be executing the code on large shared systems. (32-bits use less memory and bus bandwidth, and on sparc runs just as fast as 64-bit code otherwise). Complex finely tuned code, where the original authors may no longer be available. Critical production code, that was expensive to qualify and bring online, and which is otherwise serving its intended purpose without issue. Users in these risk adverse and/or high scale categories have good reasons to push 32-bits objects to the limit before moving on. Ancillary objects offer these users a longer runway. Design The design of ancillary objects is intended to be simple, both to help human understanding when examining elfdump output, and to lower the bar for debuggers such as dbx to support them. The primary and ancillary objects have the same set of section headers, with the same names, in the same order (i.e. each section has the same index in both files). A single added section of type SHT_SUNW_ANCILLARY is added to both objects, containing information that allows a debugger to identify and validate both files relative to each other. Given one of these files, the ancillary section allows you to identify the other. Allocable sections go in the primary object, and non-allocable ones go into the ancillary object. A small set of non-allocable objects, notably the symbol table, are copied into both objects. As noted above, most sections are only written to one of the two objects, but both objects have the same section header array. The section header in the file that does not contain the section data is tagged with the SHF_SUNW_ABSENT section header flag to indicate its placeholder status. Compiler writers and others who produce objects can set the SUNW_SHF_PRIMARY section header flag to mark non-allocable sections that should go to the primary object rather than the ancillary. If you don't request an ancillary object, the Solaris ELF format is unchanged. Users who don't use ancillary objects do not pay for the feature. This is important, because they exist to serve a small subset of our users, and must not complicate the common case. If you do request an ancillary object, the runtime behavior of the primary object will be the same as that of a normal object. There is no added runtime cost. The primary and ancillary object together represent a logical single object. This is facilitated by the use of a single set of section headers. One can easily imagine a tool that can merge a primary and ancillary object into a single file, or the reverse. (Note that although this is an interesting intellectual exercise, we don't actually supply such a tool because there's little practical benefit above and beyond using ld to create the files). Among the benefits of this approach are: There is no need for per-file symbol tables to reflect the contents of each file. The same symbol table that would be produced for a standard object can be used. The section contents are identical in either case — there is no need to alter data to accommodate multiple files. It is very easy for a debugger to adapt to these new files, and the processing involved can be encapsulated in input/output routines. Most of the existing debugger implementation applies without modification. The limit of a 4GB 32-bit output object is now raised to 4GB of code, and 4GB of debug data. There is also the future possibility (not currently supported) to support multiple ancillary objects, each of which could contain up to 4GB of additional debug data. It must be noted however that the 32-bit DWARF debug format is itself inherently 32-bit limited, as it uses 32-bit offsets between debug sections, so the ability to employ multiple ancillary object files may not turn out to be useful. Using Ancillary Objects (From the Solaris Linker and Libraries Guide) By default, objects contain both allocable and non-allocable sections. Allocable sections are the sections that contain executable code and the data needed by that code at runtime. Non-allocable sections contain supplemental information that is not required to execute an object at runtime. These sections support the operation of debuggers and other observability tools. The non-allocable sections in an object are not loaded into memory at runtime by the operating system, and so, they have no impact on memory use or other aspects of runtime performance no matter their size. For convenience, both allocable and non-allocable sections are normally maintained in the same file. However, there are situations in which it can be useful to separate these sections. To reduce the size of objects in order to improve the speed at which they can be copied across wide area networks. To support fine grained debugging of highly optimized code requires considerable debug data. In modern systems, the debugging data can easily be larger than the code it describes. The size of a 32-bit object is limited to 4 Gbytes. In very large 32-bit objects, the debug data can cause this limit to be exceeded and prevent the creation of the object. To limit the exposure of internal implementation details. Traditionally, objects have been stripped of non-allocable sections in order to address these issues. Stripping is effective, but destroys data that might be needed later. The Solaris link-editor can instead write non-allocable sections to an ancillary object. This feature is enabled with the -z ancillary command line option. $ ld ... -z ancillary[=outfile] ...By default, the ancillary file is given the same name as the primary output object, with a .anc file extension. However, a different name can be provided by providing an outfile value to the -z ancillary option. When -z ancillary is specified, the link-editor performs the following actions. All allocable sections are written to the primary object. In addition, all non-allocable sections containing one or more input sections that have the SHF_SUNW_PRIMARY section header flag set are written to the primary object. All remaining non-allocable sections are written to the ancillary object. The following non-allocable sections are written to both the primary object and ancillary object. .shstrtab The section name string table. .symtab The full non-dynamic symbol table. .symtab_shndx The symbol table extended index section associated with .symtab. .strtab The non-dynamic string table associated with .symtab. .SUNW_ancillary Contains the information required to identify the primary and ancillary objects, and to identify the object being examined. The primary object and all ancillary objects contain the same array of sections headers. Each section has the same section index in every file. Although the primary and ancillary objects all define the same section headers, the data for most sections will be written to a single file as described above. If the data for a section is not present in a given file, the SHF_SUNW_ABSENT section header flag is set, and the sh_size field is 0. This organization makes it possible to acquire a full list of section headers, a complete symbol table, and a complete list of the primary and ancillary objects from either of the primary or ancillary objects. The following example illustrates the underlying implementation of ancillary objects. An ancillary object is created by adding the -z ancillary command line option to an otherwise normal compilation. The file utility shows that the result is an executable named a.out, and an associated ancillary object named a.out.anc. $ cat hello.c #include <stdio.h> int main(int argc, char **argv) { (void) printf("hello, world\n"); return (0); } $ cc -g -zancillary hello.c $ file a.out a.out.anc a.out: ELF 32-bit LSB executable 80386 Version 1 [FPU], dynamically linked, not stripped, ancillary object a.out.anc a.out.anc: ELF 32-bit LSB ancillary 80386 Version 1, primary object a.out $ ./a.out hello worldThe resulting primary object is an ordinary executable that can be executed in the usual manner. It is no different at runtime than an executable built without the use of ancillary objects, and then stripped of non-allocable content using the strip or mcs commands. As previously described, the primary object and ancillary objects contain the same section headers. To see how this works, it is helpful to use the elfdump utility to display these section headers and compare them. The following table shows the section header information for a selection of headers from the previous link-edit example. Index Section Name Type Primary Flags Ancillary Flags Primary Size Ancillary Size 13 .text PROGBITS ALLOC EXECINSTR ALLOC EXECINSTR SUNW_ABSENT 0x131 0 20 .data PROGBITS WRITE ALLOC WRITE ALLOC SUNW_ABSENT 0x4c 0 21 .symtab SYMTAB 0 0 0x450 0x450 22 .strtab STRTAB STRINGS STRINGS 0x1ad 0x1ad 24 .debug_info PROGBITS SUNW_ABSENT 0 0 0x1a7 28 .shstrtab STRTAB STRINGS STRINGS 0x118 0x118 29 .SUNW_ancillary SUNW_ancillary 0 0 0x30 0x30 The data for most sections is only present in one of the two files, and absent from the other file. The SHF_SUNW_ABSENT section header flag is set when the data is absent. The data for allocable sections needed at runtime are found in the primary object. The data for non-allocable sections used for debugging but not needed at runtime are placed in the ancillary file. A small set of non-allocable sections are fully present in both files. These are the .SUNW_ancillary section used to relate the primary and ancillary objects together, the section name string table .shstrtab, as well as the symbol table.symtab, and its associated string table .strtab. It is possible to strip the symbol table from the primary object. A debugger that encounters an object without a symbol table can use the .SUNW_ancillary section to locate the ancillary object, and access the symbol contained within. The primary object, and all associated ancillary objects, contain a .SUNW_ancillary section that allows all the objects to be identified and related together. $ elfdump -T SUNW_ancillary a.out a.out.anc a.out: Ancillary Section: .SUNW_ancillary index tag value [0] ANC_SUNW_CHECKSUM 0x8724 [1] ANC_SUNW_MEMBER 0x1 a.out [2] ANC_SUNW_CHECKSUM 0x8724 [3] ANC_SUNW_MEMBER 0x1a3 a.out.anc [4] ANC_SUNW_CHECKSUM 0xfbe2 [5] ANC_SUNW_NULL 0 a.out.anc: Ancillary Section: .SUNW_ancillary index tag value [0] ANC_SUNW_CHECKSUM 0xfbe2 [1] ANC_SUNW_MEMBER 0x1 a.out [2] ANC_SUNW_CHECKSUM 0x8724 [3] ANC_SUNW_MEMBER 0x1a3 a.out.anc [4] ANC_SUNW_CHECKSUM 0xfbe2 [5] ANC_SUNW_NULL 0 The ancillary sections for both objects contain the same number of elements, and are identical except for the first element. Each object, starting with the primary object, is introduced with a MEMBER element that gives the file name, followed by a CHECKSUM that identifies the object. In this example, the primary object is a.out, and has a checksum of 0x8724. The ancillary object is a.out.anc, and has a checksum of 0xfbe2. The first element in a .SUNW_ancillary section, preceding the MEMBER element for the primary object, is always a CHECKSUM element, containing the checksum for the file being examined. The presence of a .SUNW_ancillary section in an object indicates that the object has associated ancillary objects. The names of the primary and all associated ancillary objects can be obtained from the ancillary section from any one of the files. It is possible to determine which file is being examined from the larger set of files by comparing the first checksum value to the checksum of each member that follows. Debugger Access and Use of Ancillary Objects Debuggers and other observability tools must merge the information found in the primary and ancillary object files in order to build a complete view of the object. This is equivalent to processing the information from a single file. This merging is simplified by the primary object and ancillary objects containing the same section headers, and a single symbol table. The following steps can be used by a debugger to assemble the information contained in these files. Starting with the primary object, or any of the ancillary objects, locate the .SUNW_ancillary section. The presence of this section identifies the object as part of an ancillary group, contains information that can be used to obtain a complete list of the files and determine which of those files is the one currently being examined. Create a section header array in memory, using the section header array from the object being examined as an initial template. Open and read each file identified by the .SUNW_ancillary section in turn. For each file, fill in the in-memory section header array with the information for each section that does not have the SHF_SUNW_ABSENT flag set. The result will be a complete in-memory copy of the section headers with pointers to the data for all sections. Once this information has been acquired, the debugger can proceed as it would in the single file case, to access and control the running program. Note - The ELF definition of ancillary objects provides for a single primary object, and an arbitrary number of ancillary objects. At this time, the Oracle Solaris link-editor only produces a single ancillary object containing all non-allocable sections. This may change in the future. Debuggers and other observability tools should be written to handle the general case of multiple ancillary objects. ELF Implementation Details (From the Solaris Linker and Libraries Guide) To implement ancillary objects, it was necessary to extend the ELF format to add a new object type (ET_SUNW_ANCILLARY), a new section type (SHT_SUNW_ANCILLARY), and 2 new section header flags (SHF_SUNW_ABSENT, SHF_SUNW_PRIMARY). In this section, I will detail these changes, in the form of diffs to the Solaris Linker and Libraries manual. Part IV ELF Application Binary Interface Chapter 13: Object File Format Object File Format Edit Note: This existing section at the beginning of the chapter describes the ELF header. There's a table of object file types, which now includes the new ET_SUNW_ANCILLARY type. e_type Identifies the object file type, as listed in the following table. NameValueMeaning ET_NONE0No file type ET_REL1Relocatable file ET_EXEC2Executable file ET_DYN3Shared object file ET_CORE4Core file ET_LOSUNW0xfefeStart operating system specific range ET_SUNW_ANCILLARY0xfefeAncillary object file ET_HISUNW0xfefdEnd operating system specific range ET_LOPROC0xff00Start processor-specific range ET_HIPROC0xffffEnd processor-specific range Sections Edit Note: This overview section defines the section header structure, and provides a high level description of known sections. It was updated to define the new SHF_SUNW_ABSENT and SHF_SUNW_PRIMARY flags and the new SHT_SUNW_ANCILLARY section. ... sh_type Categorizes the section's contents and semantics. Section types and their descriptions are listed in Table 13-5. sh_flags Sections support 1-bit flags that describe miscellaneous attributes. Flag definitions are listed in Table 13-8. ... Table 13-5 ELF Section Types, sh_type NameValue . . . SHT_LOSUNW0x6fffffee SHT_SUNW_ancillary0x6fffffee . . . ... SHT_LOSUNW - SHT_HISUNW Values in this inclusive range are reserved for Oracle Solaris OS semantics. SHT_SUNW_ANCILLARY Present when a given object is part of a group of ancillary objects. Contains information required to identify all the files that make up the group. See Ancillary Section. ... Table 13-8 ELF Section Attribute Flags NameValue . . . SHF_MASKOS0x0ff00000 SHF_SUNW_NODISCARD0x00100000 SHF_SUNW_ABSENT0x00200000 SHF_SUNW_PRIMARY0x00400000 SHF_MASKPROC0xf0000000 . . . ... SHF_SUNW_ABSENT Indicates that the data for this section is not present in this file. When ancillary objects are created, the primary object and any ancillary objects, will all have the same section header array, to facilitate merging them to form a complete view of the object, and to allow them to use the same symbol tables. Each file contains a subset of the section data. The data for allocable sections is written to the primary object while the data for non-allocable sections is written to an ancillary file. The SHF_SUNW_ABSENT flag is used to indicate that the data for the section is not present in the object being examined. When the SHF_SUNW_ABSENT flag is set, the sh_size field of the section header must be 0. An application encountering an SHF_SUNW_ABSENT section can choose to ignore the section, or to search for the section data within one of the related ancillary files. SHF_SUNW_PRIMARY The default behavior when ancillary objects are created is to write all allocable sections to the primary object and all non-allocable sections to the ancillary objects. The SHF_SUNW_PRIMARY flag overrides this behavior. Any output section containing one more input section with the SHF_SUNW_PRIMARY flag set is written to the primary object without regard for its allocable status. ... Two members in the section header, sh_link, and sh_info, hold special information, depending on section type. Table 13-9 ELF sh_link and sh_info Interpretation sh_typesh_linksh_info . . . SHT_SUNW_ANCILLARY The section header index of the associated string table. 0 . . . Special Sections Edit Note: This section describes the sections used in Solaris ELF objects, using the types defined in the previous description of section types. It was updated to define the new .SUNW_ancillary (SHT_SUNW_ANCILLARY) section. Various sections hold program and control information. Sections in the following table are used by the system and have the indicated types and attributes. Table 13-10 ELF Special Sections NameTypeAttribute . . . .SUNW_ancillarySHT_SUNW_ancillaryNone . . . ... .SUNW_ancillary Present when a given object is part of a group of ancillary objects. Contains information required to identify all the files that make up the group. See Ancillary Section for details. ... Ancillary Section Edit Note: This new section provides the format reference describing the layout of a .SUNW_ancillary section and the meaning of the various tags. Note that these sections use the same tag/value concept used for dynamic and capabilities sections, and will be familiar to anyone used to working with ELF. In addition to the primary output object, the Solaris link-editor can produce one or more ancillary objects. Ancillary objects contain non-allocable sections that would normally be written to the primary object. When ancillary objects are produced, the primary object and all of the associated ancillary objects contain a SHT_SUNW_ancillary section, containing information that identifies these related objects. Given any one object from such a group, the ancillary section provides the information needed to identify and interpret the others. This section contains an array of the following structures. See sys/elf.h. typedef struct { Elf32_Word a_tag; union { Elf32_Word a_val; Elf32_Addr a_ptr; } a_un; } Elf32_Ancillary; typedef struct { Elf64_Xword a_tag; union { Elf64_Xword a_val; Elf64_Addr a_ptr; } a_un; } Elf64_Ancillary; For each object with this type, a_tag controls the interpretation of a_un. a_val These objects represent integer values with various interpretations. a_ptr These objects represent file offsets or addresses. The following ancillary tags exist. Table 13-NEW1 ELF Ancillary Array Tags NameValuea_un ANC_SUNW_NULL0Ignored ANC_SUNW_CHECKSUM1a_val ANC_SUNW_MEMBER2a_ptr ANC_SUNW_NULL Marks the end of the ancillary section. ANC_SUNW_CHECKSUM Provides the checksum for a file in the c_val element. When ANC_SUNW_CHECKSUM precedes the first instance of ANC_SUNW_MEMBER, it provides the checksum for the object from which the ancillary section is being read. When it follows an ANC_SUNW_MEMBER tag, it provides the checksum for that member. ANC_SUNW_MEMBER Specifies an object name. The a_ptr element contains the string table offset of a null-terminated string, that provides the file name. An ancillary section must always contain an ANC_SUNW_CHECKSUM before the first instance of ANC_SUNW_MEMBER, identifying the current object. Following that, there should be an ANC_SUNW_MEMBER for each object that makes up the complete set of objects. Each ANC_SUNW_MEMBER should be followed by an ANC_SUNW_CHECKSUM for that object. A typical ancillary section will therefore be structured as: TagMeaning ANC_SUNW_CHECKSUMChecksum of this object ANC_SUNW_MEMBERName of object #1 ANC_SUNW_CHECKSUMChecksum for object #1 . . . ANC_SUNW_MEMBERName of object N ANC_SUNW_CHECKSUMChecksum for object N ANC_SUNW_NULL An object can therefore identify itself by comparing the initial ANC_SUNW_CHECKSUM to each of the ones that follow, until it finds a match. Related Other Work The GNU developers have also encountered the need/desire to support separate debug information files, and use the solution detailed at http://sourceware.org/gdb/onlinedocs/gdb/Separate-Debug-Files.html. At the current time, the separate debug file is constructed by building the standard object first, and then copying the debug data out of it in a separate post processing step, Hence, it is limited to a total of 4GB of code and debug data, just as a single object file would be. They are aware of this, and I have seen online comments indicating that they may add direct support for generating these separate files to their link-editor. It is worth noting that the GNU objcopy utility is available on Solaris, and that the Studio dbx debugger is able to use these GNU style separate debug files even on Solaris. Although this is interesting in terms giving Linux users a familiar environment on Solaris, the 4GB limit means it is not an answer to the problem of very large 32-bit objects. We have also encountered issues with objcopy not understanding Solaris-specific ELF sections, when using this approach. The GNU community also has a current effort to adapt their DWARF debug sections in order to move them to separate files before passing the relocatable objects to the linker. The details of Project Fission can be found at http://gcc.gnu.org/wiki/DebugFission. The goal of this project appears to be to reduce the amount of data seen by the link-editor. The primary effort revolves around moving DWARF data to separate .dwo files so that the link-editor never encounters them. The details of modifying the DWARF data to be usable in this form are involved — please see the above URL for details.

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• Silverlight Cream for March 08, 2010 -- #809

  - by Dave Campbell

  In this Issue: Michael Washington, Tim Greenfield, Bobby Diaz(-2-), Glenn Block(-2-), Nikhil Kothari, Jianqiang Bao(-2-), and Christopher Bennage. Shoutouts: Adam Kinney announced a Big update for the Project Rosetta site today Arpit Gupta has opened a new blog with a great logo: I think therefore I am dangerous :) From SilverlightCream.com: DotNetNuke Silverlight Traffic Module If it's DNN and Silverlight, it has to be my buddy Michael Washington :) ... Michael has combined those stunning gauges you've seen with website traffic... just too cool!... grab the code and display yours too! Cool demonstration of Silverlight VideoBrush This is a no-code post by Tim Greenfield, but I like the UX on this Jigsaw Puzzle page... and you can make your own. Introducing the Earthquake Locator – A Bing Maps Silverlight Application, part 1 Bobby Diaz has an informative post up on combining earthquake data with BingMaps in Silverlight 3... check it out, the grab the recently posted Live Demo and Source Code Adding Volcanos and Options - Earthquake Locator, part 2 Bobby Diaz also added volcanic activity to his earthquake BinMaps app, and updated the downloadable code and live demo. Building Hello MEF – Part IV – DeploymentCatalog Glenn Block posted a pair of MEF posts yesterday... made me think I missed one :) .. the first one is about the DeploymentCatalog. Note he is going to be using the CodePlex bits in his posts. Building HelloMEF – Part V – Refactoring to ViewModel Glenn Block's part V is about MEF and MVVM -- no, really! ... he is refactoring MVVM into the app with a nod to Josh Smith and Laurent Bugnion... get your head around this... The Case for ViewModel Nikhil Kothari has a post up about the ViewModel, and how it facilitates designer/developer workflow, jumpstarts development, improves scaling, and makes asynch programming development simpler MMORPG programming in Silverlight Tutorial (12)Map Instance (Part I) Jianqiang Bao has part 12 of his MMORPG game up... this one is showing how to deal with obstuctions on maps. MMORPG programming in Silverlight Tutorial (13)Perfect moving mechanism Jianqiang Bao also has part 13 up, and this second one is about sprite movement around the obstructions. 1 Simple Step for Commanding in Silverlight Christopher Bennage blogged about Commanding in Silverlight, he begins with a blog post about commands in Silverlight 4 then goes on to demonstrate the Caliburn way of doing commanding. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    MIX10

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• SQL SERVER – Weekend Project – Visiting Friend’s Company – Koenig Solutions

  - by pinaldave

  I have decided to do some interesting experiments every weekend and share it next week as a weekend project on the blog. Many times our business lives and personal lives are very separate, however this post will talk about one instance where my two lives connect. This weekend I visited my friend’s company. My friend owns Koenig, so of course I am very interested so see that they are doing well.  I have been very impressed this year, as they have expanded into multiple cities and are offering more and more classes about Business Intelligence, Project Management, networking, and much more. Koenig Solutions originally were a company that focused on training IT professionals – from topics like databases and even English language courses.  As the company grew more popular, Koenig began their blog to keep fans updated, and gradually have added more and more courses. I am very happy for my friend’s success, but as a technology enthusiast I am also pleased with Koenig Solutions’ success.  Whenever anyone in our field improves, the field as a whole does better.  Koenig offers high quality classes on a variety of topics at a variety of levels, so anyone can benefit from browsing this blog. I am a big fan of technology (obviously), and I feel blessed to have gotten in on the “ground floor,” even though there are some people out there who think technology has advanced as far as possible – I believe they will be proven wrong.  And that is why I think companies like Koenig Solutions are so important – they are providing training and support in a quickly growing field, and providing job skills in this tough economy. I believe this particular post really highlights how I, and Koenig, feel about the IT industry.  It is quickly expanding, and job opportunities are sure to abound – but how can the average person get started in this exciting field?  This post emphasizes that knowledge is power – know what interests you in the IT field, get an education, and continue your training even after you’ve gotten your foot in the door. Koenig Solutions provides what I feel is one of the most important services in the modern world – in person training.  They obviously offer many online courses, but you can also set up physical, face-to-face training through their website.  As I mentioned before, they offer a wide variety of classes that cater to nearly every IT skill you can think of.  If you have more specific needs, they also offer one of the best English language training courses.  English is turning into the language of technology, so these courses can ensure that you are keeping up the pace. Koenig Solutions and I agree about how important training can be, and even better – they provide some of the best training around.  We share ideals and I am very happy see the success of my friend. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQL Training, SQLAuthority Author Visit, T SQL, Technology Tagged: Developer Training

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• Next Phase of ECM 11g Now Available - New UCM & URM 11g, & Updated I/PM & IRM 11g

  - by michelle.huff

  We're excited to announce that the Oracle Enterprise Content Management Suite 11g is now available! Today, Oracle announced ECM Suite 11g, a part of Fusion Middleware 11gR1 Patchset 2 release, which builds upon the Imaging and Process Management (I/PM) and Information Rights Management (IRM) 11g release earlier this year. Universal Content Management (UCM) and Universal Records Management (URM) 11g are now available with many new features and enhancements. All ECM products are localized into 27 languages, use a single repository, a single installer, centralized administration, and all run on the same Fusion Middleware tech stack. Oracle ECM Suite 11g, is better integrated to fit the way you work, with extreme performance and extreme scalability. Universal Content Management One click Web content management - brings Web content management authoring, design and presentation capabilities directly into how organizations design sites, portals, and custom Web applications. Simply take in the right amount of WCM that meets your needs - all without having to rewrite the application or port it over to a new technology stack or framework. Greater business user empowerment - with next generation desktop integrations and "smart productivity folders", new Web site "design mode" for business users, and enhanced rich media support enabling users to better work with photography, graphics, videos & podcasts created today as well as contribute content within Flash files directly from the Web. Advanced manageability with extreme performance & scalability - centralized system monitoring, installation, logging, performance metrics & diagnostics, with new built in "fast check-in" features, redesigned component management interface - all running on Fusion Middleware infrastructure. Universal Records Management Enhanced user experience: Oracle URM 11g makes records management easier for both business users and records administrators. Simplifications in the end user experience allow the creation of bookmarks into often-used part of the file plan, easy copying of categories and dispositions, and integrated folder and records search. The records management dashboard provides a consolidated view into records administrator tasks and system performance. DoD 5015.02 v3: Oracle URM is fully certified against all part of the US Department of Defense records management standard - baseline, classified, and Freedom of Information and Privacy Act. This enables Federal, state, & local governments & public agencies, as well as private companies, to maintain regulated compliance. Expanded functionality through Oracle integrations: Oracle URM 11g allows for an expanded set of functionality through integration capabilities with other Oracle products. This includes configurable records definition capabilities directly within a UCM instance. An out of the box integration with Oracle BI Publisher provides easily configured and robust reporting. Additionally, 11g offers an out of the box Oracle Secure Enterprise Search integration enabling real time full text discovery across disparate systems in an organization. Read the Press Release Watch the 3 Minute ECM 11g Video Get Up to Speed with the What's New in ECM Suite Datasheet Learn More on OTN with new tutorials, downloads and whitepapers

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• Silverlight Cream for January 03, 2011 -- #1021

  - by Dave Campbell

  In this all-Submittal Issue: Gill Cleeren(-2-), Brian Noyes, Brian Genisio, René Schulte, and Andy Schwam(-2-). Above the Fold: Silverlight: "The INavigationContentLoader interface in Silverlight 4" Gill Cleeren WP7: "Sending Windows Phone Screenshots in an Email" René Schulte WCF RIA Services: "WCF RIA Services Part 10 - Exposing Domain Services To Other Clients" Brian Noyes Shoutouts: Want to know what it takes to be an MVP? Check out René Schulte's recap of 2010: Goodbye 2010 - Hello 2011 ... awesome, René! Rui Marinho sent me this post... it's WPF, but wow... WPF and Kinect! Kinect & WPF From SilverlightCream.com: The INavigationContentLoader interface in Silverlight 4 Gill Cleeren has a couple posts up... this first is a break-out of the INavigationContentLoader... what all can be done with it, in addition to the flow of the page load process broken out. Working with the RaiseCanExecuteChanged in MVVM Light (Silverlight) Gill Cleeren' latest post is a discussion of the Silverlight ICommand interface and Laurent Bugnion's RaiseCanExecuteChanged in MVVM Light, with example code. WCF RIA Services Part 10 - Exposing Domain Services To Other Clients Brian Noyes has Part 10 in his WCF RIA Services Tutorial series up at SilverlightShow ... with info on, for example, exposint an OData, SOAP, or REST/JSON endpoint, or how to consume them. Cross-Training in Silverlight & Flex–MVVM vs Presentation Model Brian Genisio finished the year off with this post in his on-going Silverlight/Flex seris comparing MVVM vs Presentation Model .. lots of good MVVM/ViewModel tips and code in this post. Sending Windows Phone Screenshots in an Email René Schulte is the perfect guy to be doing this... how about emailing a screenshot directly from inside an app, for instance Laurent's taking a screenshot from inside an app... too cool, Rene! Windows Phone 7 Application Development Tips Andy Schwam has a post up with tips he learned while creating his first WP7 app... lots of good tips, Gestures, Camera, ISO... check it out, could save you some time and tears :) WP7 Tip: Using the CameraCaptureTask for Windows Phone 7 Andy Schwam's most recent post is WP7 dev as well, and has a bunch of tips and code for using the camera, such as capturing an image, resizing, saving... good stuff. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight User Group of Switzerland (SLUGS)

  - by Laurent Bugnion

  Last Thursday, the Silverlight Firestarter event took place in Redmond, and was streamed live to a large audience worldwide (around 20’000 people). Approximately 30 if them were in Wallisellen near Zurich, in Microsoft Switzerland’s offices. This was not only a great occasion to learn more about the future of Silverlight and to see great demos, but also it was the very first meeting of the Silverlight User Group of Switzerland (SLUGS). Having 30 people for a first meeting was a great success, especially if we consider that it was REALLY cold that night, that it had snowed 20 cm the night before! We all had a good time, and 3 lucky winners went back home with a prize: One LG Optimus 7 Windows Phone and two copies of Silverlight 4 Unleashed. Congratulations to the winners! After the keynote (which went in a whirlwind, shortest 90 minutes ever!), we all had pizza and beverages generously sponsored by the Swiss DPE team, of which not less than 5 guys came to the event! Thanks to Stefano, Ronnie, Sascha, Big Mike and Ken for attending! We decided to have meetings every month. Stay tuned for announcements on when and where the events will take place. We are also in the process of creating various groups online where the attendees can find more information. For instance, I created a group on Flickr where the pictures taken at events will be published. The group is public, and the pictures of the first event are already online! We also have the already known page at http://www.slugs.ch/, check it out. A national group Even though the first event was in Zurich, and that 3 of the founding members live nearby, we would like to try and be a national group. That means having events sometimes in other parts of Switzerland, collaborating with other local user groups, etc. Stay tuned for more Join! We want you, we need you If you are doing Silverlight, for a living or as a hobby, if you are interested in user experience, XAML, Expression Blend and many more topics, you should consider joining! This is a great occasion to exchange experiences, to learn from Silverlight experts, to hear sessions about various topics related to Silverlight, etc. If you want to talk about a topic that is of interest to you, If you want to propose a topic of discussion Or if you just want to hang out then go to http://www.slugs.ch and register! Cheers, Laurent   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• SQL SERVER – Log File Growing for Model Database – model Database Log File Grew Too Big

  - by pinaldave

  After reading my earlier article SQL SERVER – master Database Log File Grew Too Big, I received an email recently from another reader asking why does the log file of model database grow every day when he is not carrying out any operation in the model database. As per the email, he is absolutely sure that he is doing nothing on his model database; he had used policy management to catch any T-SQL operation in the model database and there were none. This was indeed surprising to me. I sent a request to access to his server, which he happily agreed for and within a min, we figured out the issue. He was taking the backup of the model database every day taking the database backup every night. When I explained the same to him, he did not believe it; so I quickly wrote down the following script. The results before and after the usage of the script were very clear. What is a model database? The model database is used as the template for all databases created on an instance of SQL Server. Any object you create in the model database will be automatically created in subsequent user database created on the server. NOTE: Do not run this in production environment. During the demo, the model database was in full recovery mode and only full backup operation was performed (no log backup). Before Backup Script Backup Script in loop DECLARE @FLAG INT SET @FLAG = 1 WHILE(@FLAG < 1000) BEGIN BACKUP DATABASE [model] TO  DISK = N'D:\model.bak' SET @FLAG = @FLAG + 1 END GO After Backup Script Why did this happen? The model database was in full recovery mode and taking full backup is logged operation. As there was no log backup and only full backup was performed on the model database, the size of the log file kept growing. Resolution: Change the backup mode of model database from “Full Recovery” to “Simple Recovery.”. Take full backup of the model database “only” when you change something in the model database. Let me know if you have encountered a situation like this? If so, how did you resolve it? It will be interesting to know about your experience. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Backup and Restore, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• SQL SERVER – guest User and MSDB Database – Enable guest User on MSDB Database

  - by pinaldave

  I have written a few articles recently on the subject of guest account. Here’s a quick list of these articles: SQL SERVER – Disable Guest Account – Serious Security Issue SQL SERVER – Force Removing User from Database – Fix: Error: Could not drop login ‘test’ as the user is currently logged in. SQL SERVER – Detecting guest User Permissions – guest User Access Status One of the advices which I gave in all the three blog posts was: Disable the guest user in the user-created database. Additionally, I have mentioned that one should let the user account become enabled in MSDB database. I got many questions asking if there is any specific reason why this should be kept enabled, questions like, “What is the reason that MSDB database needs guest user?” Honestly, I did not know that the concept of the guest user will create so much interest in the readers. So now let’s turn this blog post into questions and answers format. Q: What will happen if the guest user is disabled in MSDB database? A:  Lots of bad things will happen. Error 916 - Logins can connect to this instance of SQL Server but they do not have specific permissions in a database to receive the permissions of the guest user. Q: How can I determine if the guest user is enabled or disabled for any specific database? A: There are many ways to do this. Make sure that you run each of these methods with the context of the database. For an example for msdb database, you can run the following code: USE msdb; SELECT name, permission_name, state_desc FROM sys.database_principals dp INNER JOIN sys.server_permissions sp ON dp.principal_id = sp.grantee_principal_id WHERE name = 'guest' AND permission_name = 'CONNECT' There are many other methods to detect the guest user status. Read them here: Detecting guest User Permissions – guest User Access Status Q: What is the default status of the guest user account in database? A: Enabled in master, TempDb, and MSDB. Disabled in model database. Q: Why is the default status of the guest user disabled in model database? A: It is not recommended to enable the guest in user database as it can introduce serious security threat. It can seriously damage the database if configured incorrectly. Read more here: Disable Guest Account – Serious Security Issue Q: How to disable guest user? A: REVOKE CONNECT FROM guest Q: How to enable guest user? A: GRANT CONNECT TO guest Did I miss any critical question in the list? Please leave your question as a comment and I will add it to this list. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Security, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• JRockit R28/JRockit Mission Control 4.0 is out!

  - by Marcus Hirt

  The next major release of JRockit is finally out! Here are some highlights: Includes the all new JRockit Flight Recorder – supersedes the old JRockit Runtime Analyser. The new flight recorder is inspired by the “black box” in airplanes. It uses a highly efficient recording engine and thread local buffers to capture data about the runtime and the application running in the JVM. It can be configured to always be on, so that whenever anything “interesting” happens, data can be dumped for some time back. Think of it as your own personal profiling time machine. Automatic shortest path calculation in Memleak – no longer any need for running around in circles when trying to find your way back to a thread root from an instance. Memleak can now show class loader related information and split graphs on a per class loader basis. More easily configured JMX agent – default port for both RMI Registry and RMI Server can be configured, and is by default the same, allowing easier configuration of firewalls. Up to 64 GB (was 4GB) compressed references. Per thread allocation profiling in the Management Console. Native Memory Tracking – it is now possible to track native memory allocations with very high resolution. The information can either be accessed using JRCMD, or the dedicated Native Memory Tracking experimental plug-in for the Management Console (alas only available for the upcoming 4.0.1 release). JRockit can now produce heap dumps in HPROF format. Cooperative suspension – JRockit is no longer using system signals for stopping threads, which could lead to hangs if signals were lost or blocked (for example bad NFS shares). Now threads check periodically to see if they are suspended. VPAT/Section 508 compliant JRMC – greatly improved keyboard navigation and screen reader support. See New and Noteworthy for more information. JRockit Mission Control 4.0.0 can be downloaded from here: http://www.oracle.com/technology/software/products/jrockit/index.html <shameless ad> There is even a book to go with JRMC 4.0.0/JRockit R28! http://www.packtpub.com/oracle-jrockit-the-definitive-guide/book/ </shameless ad>

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• "exception at 0x53C227FF (msvcr110d.dll)" with SOIL library

  - by Sean M.

  I'm creating a game in C++ using OpenGL, and decided to go with the SOIL library for image loading, as I have used it in the past to great effect. The problem is, in my newest game, trying to load an image with SOIL throws the following runtime error: This error points to this part: // SOIL.c int query_NPOT_capability( void ) { /* check for the capability */ if( has_NPOT_capability == SOIL_CAPABILITY_UNKNOWN ) { /* we haven't yet checked for the capability, do so */ if( (NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), "GL_ARB_texture_non_power_of_two" ) ) ) //############ it points here ############// { /* not there, flag the failure */ has_NPOT_capability = SOIL_CAPABILITY_NONE; } else { /* it's there! */ has_NPOT_capability = SOIL_CAPABILITY_PRESENT; } } /* let the user know if we can do non-power-of-two textures or not */ return has_NPOT_capability; } Since it points to the line where SOIL tries to access the OpenGL extensions, I think that for some reason SOIL is trying to load the texture before an OpenGL context is created. The problem is, I've gone through the entire solution, and there is only one place where SOIL has to load a texture, and it happens long after the OpenGL context is created. This is the part where it loads the texture... //Init glfw if (!glfwInit()) { fprintf(stderr, "GLFW Initialization has failed!\n"); exit(EXIT_FAILURE); } printf("GLFW Initialized.\n"); //Process the command line arguments processCmdArgs(argc, argv); //Create the window glfwWindowHint(GLFW_SAMPLES, g_aaSamples); glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3); glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2); g_mainWindow = glfwCreateWindow(g_screenWidth, g_screenHeight, "Voxel Shipyard", g_fullScreen ? glfwGetPrimaryMonitor() : nullptr, nullptr); if (!g_mainWindow) { fprintf(stderr, "Could not create GLFW window!\n"); closeOGL(); exit(EXIT_FAILURE); } glfwMakeContextCurrent(g_mainWindow); printf("Window and OpenGL rendering context created.\n"); //Create the internal rendering components prepareScreen(); //Init glew glewExperimental = GL_TRUE; int err = glewInit(); if (err != GLEW_OK) { fprintf(stderr, "GLEW initialization failed!\n"); fprintf(stderr, "%s\n", glewGetErrorString(err)); closeOGL(); exit(EXIT_FAILURE); } printf("GLEW initialized.\n"); <-- Sucessfully creates an OpenGL context //Initialize the app g_app = new App(); g_app->PreInit(); g_app->Init(); g_app->PostInit(); <-- Loads the texture (after the context is created) ...and debug printing to the console CONFIRMS that the OpenGL context was created before the texture loading was attempted. So my question is if anyone is familiar with this specific error, or knows if there is a specific instance as to why SOIL would think OpenGL isn't initialized yet.

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• Dependency injection with n-tier Entity Framework solution

  - by Matthew

  I am currently designing an n-tier solution which is using Entity Framework 5 (.net 4) as its data access strategy, but am concerned about how to incorporate dependency injection to make it testable / flexible. My current solution layout is as follows (my solution is called Alcatraz): Alcatraz.WebUI: An asp.net webform project, the front end user interface, references projects Alcatraz.Business and Alcatraz.Data.Models. Alcatraz.Business: A class library project, contains the business logic, references projects Alcatraz.Data.Access, Alcatraz.Data.Models Alcatraz.Data.Access: A class library project, houses AlcatrazModel.edmx and AlcatrazEntities DbContext, references projects Alcatraz.Data.Models. Alcatraz.Data.Models: A class library project, contains POCOs for the Alcatraz model, no references. My vision for how this solution would work is the web-ui would instantiate a repository within the business library, this repository would have a dependency (through the constructor) of a connection string (not an AlcatrazEntities instance). The web-ui would know the database connection strings, but not that it was an entity framework connection string. In the Business project: public class InmateRepository : IInmateRepository { private string _connectionString; public InmateRepository(string connectionString) { if (connectionString == null) { throw new ArgumentNullException("connectionString"); } EntityConnectionStringBuilder connectionBuilder = new EntityConnectionStringBuilder(); connectionBuilder.Metadata = "res://*/AlcatrazModel.csdl|res://*/AlcatrazModel.ssdl|res://*/AlcatrazModel.msl"; connectionBuilder.Provider = "System.Data.SqlClient"; connectionBuilder.ProviderConnectionString = connectionString; _connectionString = connectionBuilder.ToString(); } public IQueryable<Inmate> GetAllInmates() { AlcatrazEntities ents = new AlcatrazEntities(_connectionString); return ents.Inmates; } } In the Web UI: IInmateRepository inmateRepo = new InmateRepository(@"data source=MATTHEW-PC\SQLEXPRESS;initial catalog=Alcatraz;integrated security=True;"); List<Inmate> deathRowInmates = inmateRepo.GetAllInmates().Where(i => i.OnDeathRow).ToList(); I have a few related questions about this design. 1) Does this design even make sense in terms of Entity Frameworks capabilities? I heard that Entity framework uses the Unit-of-work pattern already, am I just adding another layer of abstract unnecessarily? 2) I don't want my web-ui to directly communicate with Entity Framework (or even reference it for that matter), I want all database access to go through the business layer as in the future I will have multiple projects using the same business layer (web service, windows application, etc.) and I want to have it easy to maintain / update by having the business logic in one central area. Is this an appropriate way to achieve this? 3) Should the Business layer even contain repositories, or should that be contained within the Access layer? If where they are is alright, is passing a connection string a good dependency to assume? Thanks for taking the time to read!

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• Dynamic meta description and keyword tags for your MasterPages

  - by Aamir Hasan

   Today we're going to look at a technique for dynamically inserting meta tags into your master pages. By taking control of the head tag and inserting your own HtmlMeta you can easily customise these tags.Might have noticed that when you create a new master page in visual studio your <head> tag gets decorated with a runat="server" attribute.Asp.net doesn't add this kind of decoration to any other html tags (although you are free to add it if you want). So what makes the head tag special?By adding the runat="server" you're giving actually converting the control into a HtmlHead control. That doesn't particularly matter for this tutorial other than to note that given a reference to the head control you get all the extras that come with asp.net controls such as access to its controls collection.The HtmlMeta control lets us wrap up <meta> tags via asp.net code. To add a meta description we need to create an instance, set the name property, the content property, and then add it to the head: asp.net using (C#)protected void Page_Init(object sender, EventArgs e){  // Add meta description tag  HtmlMeta metaDescription = new HtmlMeta();  metaDescription.Name = "Description";  metaDescription.Content = "Short, unique and keywords rich page description.";  Page.Header.Controls.Add(metaDescription);   // Add meta keywords tag  HtmlMeta metaKeywords = new HtmlMeta();  metaKeywords.Name = "Keywords";  metaKeywords.Content = "selected,page,keywords";  Page.Header.Controls.Add(metaKeywords);}asp.net ( VB.NET )Protected Sub Page_Init(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Init  ' Add meta description tag  Dim metaDescription As HtmlMeta = New HtmlMeta()  metaDescription.Name = "Description"  metaDescription.Content = "Short, unique and keywords rich page description."  Page.Header.Controls.Add(metaDescription)   ' Add meta keywords tag  Dim metaKeywords As HtmlMeta = New HtmlMeta()  metaKeywords.Name = "Keywords"  metaKeywords.Content = "selected,page,keywords"  Page.Header.Controls.Add(metaKeywords)End Sub

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• Silverlight Cream for May 17, 2010 -- #863

  - by Dave Campbell

  In this Issue: Christian Schormann, Vladimir Bodurov, Pete Brown, Justin Angel, John Papa(-2-), Fons Sonnemans, Miroslav Miroslavov, and Jeremy Likness. Shoutouts: Jeff Brand has been doing WP7 presentations and posted Windows Phone 7 Presentation and Sample Code Mark Tucker posted about his Windows Phone 7 Presentation at Desert Code Camp 2010 John Allwright discusses 4 New case Studies on Silverlight at the Winter Olympics From SilverlightCream.com: New Video by Jon Harris: Blend 4 for Windows Phone in 90 Seconds Christian Schormann is discussing a second 90-second Expression Blend video tutorial by Jon Harris... this second one is about Blend 4 for WP7. XmlCodeEditor – Silverlight 4 control for editing XML and HTML on the browser Vladimir Bodurov has a post up extending the RichTextBox control to add coloring for HTML and XAML ... it colors as you type, and he plans on adding Intellisense! Creating a Simple Report Writer in Silverlight 4 While working on his book, Pete Brown decided to share some Silverlight 'Report Writer' work with us... check out that list of goals near the top that are all met... looks great to me! Windows Phone 7 - Unlocked ROMs Justin Angel has a good long post about a subject I've stayed away from until now that someone of Justin's level of knowledge has approached it: WP7 ROMs. Silverlight 4 Tools for Visual Studio 2010 Launch: New Designer Capabilities (Silverlight TV 27) John Papa has Silverlight TV 27 up today and is talking about the Silverlight 4 Tools for VS2010 launch with Mark Wilson-Thomas ... the video would be a great place to pick up some of the new features (hint, hint) WCF RIA Services v1.0 Launch! (Silverlight TV 28) John Papa also has Silverlight TV 28 up, talking with Nikhil Kothari and Dinesh Kulkarni about the v 1.0 release of WCF RIA Services. RightMouseTrigger Fons Sonnemans updated his MineSweeper game and has it posted at Silver Arcade, this version supports right mouse click via RightMouseTrigger code that he is sharing. Smoke effect The 'Smoke Effect' menus at the CompleteIT site are awesome, and this time out, Miroslav Miroslavov discusses how that was done and gives up the code...! WebClient and DeploymentCatalog gotchas in Silverlight OOB Jeremy Likness has a post up to give you some relief if you hit the same MEF/Silverlight gotcha he did when running OOB... like not running in OOB for instance. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Alert visualization recipe: Get out your blender, drop in some sp_send_dbmail, Google Charts API, add your favorite colors and sprinkle with html. Blend till it’s smooth and looks pretty enough to taste.

  - by Maria Zakourdaev

    I really like database monitoring. My email inbox have a constant flow of different types of alerts coming from our production servers with all kinds of information, sometimes more useful and sometimes less useful. Usually database alerts look really simple, it’s usually a plain text email saying “Prod1 Database data file on Server X is 80% used. You’d better grow it manually before some query triggers the AutoGrowth process”. Imagine you could have received email like the one below.  In addition to the alert description it could have also included the the database file growth chart over the past 6 months. Wouldn’t it give you much more information whether the data growth is natural or extreme? That’s truly what data visualization is for. Believe it or not, I have sent the graph below from SQL Server stored procedure without buying any additional data monitoring/visualization tool.   Would you like to visualize your database alerts like I do? Then like myself, you’d love the Google Charts. All you need to know is a little HTML and have a mail profile configured on your SQL Server instance regardless of the SQL Server version. First of all, I hope you know that the sp_send_dbmail procedure has a great parameter @body_format = ‘HTML’, which allows us to send rich and colorful messages instead of boring black and white ones. All that we need is to dynamically create HTML code. This is how, for instance, you can create a table and populate it with some data: DECLARE @html varchar(max) SET @html = '<html>' + '<H3><font id="Text" style='color: Green;'>Top Databases: </H3>' + '<table border="1" bordercolor="#3300FF" style='background-color:#DDF8CC' width='70%' cellpadding='3' cellspacing='3'>' + '<tr><font color="Green"><th>Database Name</th><th>Size</th><th>Physical Name</th></tr>' + CAST( (SELECT TOP 10                             td = name,'',                             td = size * 8/1024 ,'',                             td = physical_name              FROM sys.master_files               ORDER BY size DESC             FOR XML PATH ('tr'),TYPE ) AS VARCHAR(MAX)) + '</table>' EXEC msdb.dbo.sp_send_dbmail @recipients = '[email protected]', @subject ='Top databases', @body = @html, @body_format = 'HTML' This is the result:   If you want to add more visualization effects, you can use Google Charts Tools https://google-developers.appspot.com/chart/interactive/docs/index which is a free and rich library of data visualization charts, they’re also easy to populate and embed. There are two versions of the Google Charts Image based charts: https://google-developers.appspot.com/chart/image/docs/gallery/chart_gall This is an old version, it’s officially deprecated although it will be up for a next few years or so. I really enjoy using this one because it can be viewed within the email body. For mobile devices you need to change the “Load remote images” property in your email application configuration.           Charts based on JavaScript classes: https://google-developers.appspot.com/chart/interactive/docs/gallery This API is newer, with rich and highly interactive charts, and it’s much more easier to understand and configure. The only downside of it is that they cannot be viewed within the email body. Outlook, Gmail and many other email clients, as part of their security policy, do not run any JavaScript that’s placed within the email body. However, you can still enjoy this API by sending the report as an email attachment. Here is an example of the old version of Google Charts API, sending the same top databases report as in the previous example but instead of a simple table, this script is using a pie chart right from  the T-SQL code DECLARE @html  varchar(8000) DECLARE @Series  varchar(800),@Labels  varchar(8000),@Legend  varchar(8000);     SET @Series = ''; SET @Labels = ''; SET @Legend = ''; SELECT TOP 5 @Series = @Series + CAST(size * 8/1024 as varchar) + ',',                         @Labels = @Labels +CAST(size * 8/1024 as varchar) + 'MB'+'|',                         @Legend = @Legend + name + '|' FROM sys.master_files ORDER BY size DESC SELECT @Series = SUBSTRING(@Series,1,LEN(@Series)-1),         @Labels = SUBSTRING(@Labels,1,LEN(@Labels)-1),         @Legend = SUBSTRING(@Legend,1,LEN(@Legend)-1) SET @html =   '<H3><font color="Green"> '+@@ServerName+' top 5 databases : </H3>'+    '<br>'+    '<img src="http://chart.apis.google.com/chart?'+    'chf=bg,s,DDF8CC&'+    'cht=p&'+    'chs=400x200&'+    'chco=3072F3|7777CC|FF9900|FF0000|4A8C26&'+    'chd=t:'+@Series+'&'+    'chl='+@Labels+'&'+    'chma=0,0,0,0&'+    'chdl='+@Legend+'&'+    'chdlp=b"'+    'alt="'+@@ServerName+' top 5 databases" />'              EXEC msdb.dbo.sp_send_dbmail @recipients = '[email protected]',                             @subject = 'Top databases',                             @body = @html,                             @body_format = 'HTML' This is what you get. Isn’t it great? Chart parameters reference: chf     Gradient fill  bg - backgroud ; s- solid cht     chart type  ( p - pie) chs        chart size width/height chco    series colors chd        chart data string        1,2,3,2 chl        pir chart labels        a|b|c|d chma    chart margins chdl    chart legend            a|b|c|d chdlp    chart legend text        b - bottom of chart   Line graph implementation is also really easy and powerful DECLARE @html varchar(max) DECLARE @Series varchar(max) DECLARE @HourList varchar(max) SET @Series = ''; SET @HourList = ''; SELECT @HourList = @HourList + SUBSTRING(CONVERT(varchar(13),last_execution_time,121), 12,2)  + '|' ,              @Series = @Series + CAST( COUNT(1) as varchar) + ',' FROM sys.dm_exec_query_stats s     CROSS APPLY sys.dm_exec_sql_text(plan_handle) t WHERE last_execution_time > = getdate()-1 GROUP BY CONVERT(varchar(13),last_execution_time,121) ORDER BY CONVERT(varchar(13),last_execution_time,121) SET @Series = SUBSTRING(@Series,1,LEN(@Series)-1) SET @html = '<img src="http://chart.apis.google.com/chart?'+ 'chco=CA3D05,87CEEB&'+ 'chd=t:'+@Series+'&'+ 'chds=1,350&'+ 'chdl= Proc executions from cache&'+ 'chf=bg,s,1F1D1D|c,lg,0,363433,1.0,2E2B2A,0.0&'+ 'chg=25.0,25.0,3,2&'+ 'chls=3|3&'+ 'chm=d,CA3D05,0,-1,12,0|d,FFFFFF,0,-1,8,0|d,87CEEB,1,-1,12,0|d,FFFFFF,1,-1,8,0&'+ 'chs=600x450&'+ 'cht=lc&'+ 'chts=FFFFFF,14&'+ 'chtt=Executions for from' +(SELECT CONVERT(varchar(16),min(last_execution_time),121)          FROM sys.dm_exec_query_stats          WHERE last_execution_time > = getdate()-1) +' till '+ +(SELECT CONVERT(varchar(16),max(last_execution_time),121)     FROM sys.dm_exec_query_stats) + '&'+ 'chxp=1,50.0|4,50.0&'+ 'chxs=0,FFFFFF,12,0|1,FFFFFF,12,0|2,FFFFFF,12,0|3,FFFFFF,12,0|4,FFFFFF,14,0&'+ 'chxt=y,y,x,x,x&'+ 'chxl=0:|1|350|1:|N|2:|'+@HourList+'3:|Hour&'+ 'chma=55,120,0,0" alt="" />' EXEC msdb.dbo.sp_send_dbmail @recipients = '[email protected]', @subject ='Daily number of executions', @body = @html, @body_format = 'HTML' Chart parameters reference: chco    series colors chd        series data chds    scale format chdl    chart legend chf        background fills chg        grid line chls    line style chm        line fill chs        chart size cht        chart type chts    chart style chtt    chart title chxp    axis label positions chxs    axis label styles chxt    axis tick mark styles chxl    axis labels chma    chart margins If you don’t mind to get your charts as an email attachment, you can enjoy the Java based Google Charts which are even easier to configure, and have much more advanced graphics. In the example below, the sp_send_email procedure uses the parameter @query which will be executed at the time that sp_send_dbemail is executed and the HTML result of this execution will be attached to the email. DECLARE @html varchar(max),@query varchar(max) DECLARE @SeriesDBusers  varchar(800);     SET @SeriesDBusers = ''; SELECT @SeriesDBusers = @SeriesDBusers +  ' ["'+DB_NAME(r.database_id) +'", ' +cast(count(1) as varchar)+'],' FROM sys.dm_exec_requests r GROUP BY DB_NAME(database_id) ORDER BY count(1) desc; SET @SeriesDBusers = SUBSTRING(@SeriesDBusers,1,LEN(@SeriesDBusers)-1) SET @query = ' PRINT '' <html>   <head>     <script type="text/javascript" src="https://www.google.com/jsapi"></script>     <script type="text/javascript">       google.load("visualization", "1", {packages:["corechart"]});        google.setOnLoadCallback(drawChart);       function drawChart() {                      var data = google.visualization.arrayToDataTable([                        ["Database Name", "Active users"],                        '+@SeriesDBusers+'                      ]);                        var options = {                        title: "Active users",                        pieSliceText: "value"                      };                        var chart = new google.visualization.PieChart(document.getElementById("chart_div"));                      chart.draw(data, options);       };     </script>   </head>   <body>     <table>     <tr><td>         <div id="chart_div" style='width: 800px; height: 300px;'></div>         </td></tr>     </table>   </body> </html> ''' EXEC msdb.dbo.sp_send_dbmail    @recipients = '[email protected]',    @subject ='Active users',    @body = @html,    @body_format = 'HTML',    @query = @Query,     @attach_query_result_as_file = 1,     @query_attachment_filename = 'Results.htm' After opening the email attachment in the browser you are getting this kind of report: In fact, the above is not only for database alerts. It can be used for applicative reports if you need high levels of customization that you cannot achieve using standard methods like SSRS. If you need more information on how to customize the charts, you can try the following: Image Based Charts wizard https://google-developers.appspot.com/chart/image/docs/chart_wizard  Live Image Charts Playground https://google-developers.appspot.com/chart/image/docs/chart_playground Image Based Charts Parameters List https://google-developers.appspot.com/chart/image/docs/chart_params Java Script Charts Playground https://code.google.com/apis/ajax/playground/?type=visualization Use the above examples as a starting point for your procedures and I’d be more than happy to hear of your implementations of the above techniques. Yours, Maria

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• Multi-Threaded Application vs. Single Threaded Application

  Why would we use a multi threaded application vs. a single threaded application? First we must define multithreading. Multithreading is a feature of an operating system that allows programs to run subcomponents or threads in parallel. Typically most applications only need to use one thread because they do not perform time consuming tasks. The use of multiple threads allows an application to distribute long running tasks so that they can be executed in parallel. This gives the user the perceived appearance that the application is working faster due to the fact that while one thread is waiting on an IO process the remaining tasks can make use of the available CPU. The allows working threads to execute in tandem so that they can be competed sooner. Multithreading Benefits Improved responsiveness — Users usually report improved responsiveness compared to single thread applications. Faster applications — Multiple threads can lead to improved application performance. Prioritization — Threads can be assigned a priority which would allow higher priority tasks to take precedence over lower priority tasks. Single Threading Benefits Programming and debugging —These activities are easier compared to multithreaded applications due to the reduced complexity Less Overhead — Threads add overhead to an application When developing multi-threaded applications, the following must be considered. Deadlocks occur when two threads hold a monitor that the other one requires. In essence each task is blocking the other and both tasks are waiting for the other monitor to be released. This forces an application to hang or deadlock. Resource allocation is used to prevent deadlocks because the system determines if approving the resource request will render the system in an unsafe state. An unsafe state could result in a deadlock. The system only approves requests that will lead to safe states. Thread Synchronization is used when multiple threads use the same instance of an object. The threads accessing the object can then be locked and then synchronized so that each task can interact with the static object on at a time.

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• Speech Recognition

  - by DesigningCode

  Today I was asked to write a wee application for someone so that they could turn pages on their ebooks without having to reach for their keyboard or mouse… that way they could do craft or knit or whatever they are doing while they are reading. I vaguely remember that windows has something built in, but have never really played with it before.   I have in the past turned on the screen reader and impressed my kids by making the computer saying “amusing” phrases along the lines of “Zac has a smelly bum”. So instead of firing up Visual Studio and getting stuck into the juciy task of writing a speech recognition program…. I typed “speech recognition” into the start menu of my windows 7 computer.   And wow!  I’ve been playing with it for the last 40 minutes or so and have been most impressed.   Dictation wise it certainly misses stuff or gets the wrong words, but I did the training and it certainly improved. But what I’m enjoying is controlling windows. for instance, to start this blog entry  I said “Open Writer”  and it worked no problem.    In fact after I muddled my way through getting going with speech recognition I enjoyed saying “Open notepad” … “close”  over and over again. It allows you to click anywhere on the screen, just say “mousegrid”   and a 1-9 numbered grid comes up,  say a number and it puts a smaller 1-9 numbered grid, and you hone in, till the middle square is on a place you want to click, then you say “click” or “double click”.  if you want to enter a key, say “Press Tab”  for example.   inside programs it understands menu entries.  In fact, while writing this I just said “File”  “Save” and it happily saved. I think I will play around with this for a while more and try it out in visual studio.   Might be quite good for being able to do menu entries instead of grabbing for my mouse…. can keep my hands on the keyboard. ok, wasn’t the first post I wanted to do on geeks with blogs! but hey…   will do some techy posts soon.

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• XNA Screen Manager problem with transitions

  - by NexAddo

  I'm having issues using the game statemanagement example in the game I am developing. I have no issues with my first three screens transitioning between one another. I have a main menu screen, a splash screen and a high score screen that cycle: mainMenuScreen->splashScreen->highScoreScreen->mainMenuScreen The screens change every 15 seconds. Transition times public MainMenuScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.0); currentCreditAmount = Global.CurrentCredits; } public SplashScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.5); } public HighScoreScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.5); } public GamePlayScreen() { TransitionOnTime = TimeSpan.FromSeconds(0.5); TransitionOffTime = TimeSpan.FromSeconds(0.5); } When a user inserts credits they can play the game after pressing start mainMenuScreen->splashScreen->highScoreScreen->(loops forever) || || || ===========Credits In============= || Start || \/ LoadingScreen || Start || \/ GamePlayScreen During each of these transitions, between screens, the same code is used, which exits(removes) all current active screens and respects transitions, then adds the new screen to the screen manager: foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); //AddScreen takes a new screen to manage and the controlling player ScreenManager.AddScreen(new NameOfScreenHere(), null); Each screen is removed from the ScreenManager with ExitScreen() and using this function, each screen transition is respected. The problem I am having is with my gamePlayScreen. When the current game is finished and the transition is complete for the gamePlayScreen, it should be removed and the next screens should be added to the ScreenManager. GamePlayScreen Code Snippet private void FinishCurrentGame() { AudioManager.StopSounds(); this.UnloadContent(); if (Global.SaveDevice.IsReady) Stats.Save(); if (HighScoreScreen.IsInHighscores(timeLimit)) { foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); Global.TimeRemaining = timeLimit; ScreenManager.AddScreen(new BackgroundScreen(), null); ScreenManager.AddScreen(new MessageBoxScreen("Enter your Initials", true), null); } else { foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); ScreenManager.AddScreen(new BackgroundScreen(), null); ScreenManager.AddScreen(new MainMenuScreen(), null); } } The problem is that when isExiting is set to true by screen.ExitScreen() for the gamePlayScreen, the transition never completes the transition and removes the screen from the ScreenManager. Every other screen that I use the same technique to add and remove each screen fully transitions On/Off and is removed at the appropriate time from the ScreenManager, but noy my GamePlayScreen. Has anyone that has used the GameStateManagement example experienced this issue or can someone see the mistake I am making? EDIT This is what I tracked down. When the game is done, I call foreach (GameScreen screen in ScreenManager.GetScreens()) screen.ExitScreen(); to start the transition off process for the gameplay screen. At this point there is only 1 screen on the ScreenManager stack. The gamePlay screen gets isExiting set to true and starts to transition off. Right after the above call to ExitScreen() I add a background screen and menu screen to the screenManager: ScreenManager.AddScreen(new background(), null); ScreenManager.AddScreen(new Menu(), null); The count of the ScreenManager is now 3. What I noticed while stepping through the updates for GameScreen and ScreenManager, the gameplay screen never gets to the point where the transistion process finishes so the ScreenManager can remove it from the stack. This anomaly does not happen to any of my other screens when I switch between them. Screen Manager Code #region File Description //----------------------------------------------------------------------------- // ScreenManager.cs // // Microsoft XNA Community Game Platform // Copyright (C) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- #endregion #define DEMO #region Using Statements using System; using System.Diagnostics; using System.Collections.Generic; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Content; using Microsoft.Xna.Framework.Graphics; using PerformanceUtility.GameDebugTools; #endregion namespace GameStateManagement { /// <summary> /// The screen manager is a component which manages one or more GameScreen /// instances. It maintains a stack of screens, calls their Update and Draw /// methods at the appropriate times, and automatically routes input to the /// topmost active screen. /// </summary> public class ScreenManager : DrawableGameComponent { #region Fields List<GameScreen> screens = new List<GameScreen>(); List<GameScreen> screensToUpdate = new List<GameScreen>(); InputState input = new InputState(); SpriteBatch spriteBatch; SpriteFont font; Texture2D blankTexture; bool isInitialized; bool getOut; bool traceEnabled; #if DEBUG DebugSystem debugSystem; Stopwatch stopwatch = new Stopwatch(); bool debugTextEnabled; #endif #endregion #region Properties /// <summary> /// A default SpriteBatch shared by all the screens. This saves /// each screen having to bother creating their own local instance. /// </summary> public SpriteBatch SpriteBatch { get { return spriteBatch; } } /// <summary> /// A default font shared by all the screens. This saves /// each screen having to bother loading their own local copy. /// </summary> public SpriteFont Font { get { return font; } } public Rectangle ScreenRectangle { get { return new Rectangle(0, 0, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height); } } /// <summary> /// If true, the manager prints out a list of all the screens /// each time it is updated. This can be useful for making sure /// everything is being added and removed at the right times. /// </summary> public bool TraceEnabled { get { return traceEnabled; } set { traceEnabled = value; } } #if DEBUG public bool DebugTextEnabled { get { return debugTextEnabled; } set { debugTextEnabled = value; } } public DebugSystem DebugSystem { get { return debugSystem; } } #endif #endregion #region Initialization /// <summary> /// Constructs a new screen manager component. /// </summary> public ScreenManager(Game game) : base(game) { // we must set EnabledGestures before we can query for them, but // we don't assume the game wants to read them. //TouchPanel.EnabledGestures = GestureType.None; } /// <summary> /// Initializes the screen manager component. /// </summary> public override void Initialize() { base.Initialize(); #if DEBUG debugSystem = DebugSystem.Initialize(Game, "Fonts/MenuFont"); #endif isInitialized = true; } /// <summary> /// Load your graphics content. /// </summary> protected override void LoadContent() { // Load content belonging to the screen manager. ContentManager content = Game.Content; spriteBatch = new SpriteBatch(GraphicsDevice); font = content.Load<SpriteFont>(@"Fonts\menufont"); blankTexture = content.Load<Texture2D>(@"Textures\Backgrounds\blank"); // Tell each of the screens to load their content. foreach (GameScreen screen in screens) { screen.LoadContent(); } } /// <summary> /// Unload your graphics content. /// </summary> protected override void UnloadContent() { // Tell each of the screens to unload their content. foreach (GameScreen screen in screens) { screen.UnloadContent(); } } #endregion #region Update and Draw /// <summary> /// Allows each screen to run logic. /// </summary> public override void Update(GameTime gameTime) { #if DEBUG debugSystem.TimeRuler.StartFrame(); debugSystem.TimeRuler.BeginMark("Update", Color.Blue); if (debugTextEnabled && getOut == false) { debugSystem.FpsCounter.Visible = true; debugSystem.TimeRuler.Visible = true; debugSystem.TimeRuler.ShowLog = true; getOut = true; } else if (debugTextEnabled == false) { getOut = false; debugSystem.FpsCounter.Visible = false; debugSystem.TimeRuler.Visible = false; debugSystem.TimeRuler.ShowLog = false; } #endif // Read the keyboard and gamepad. input.Update(); // Make a copy of the master screen list, to avoid confusion if // the process of updating one screen adds or removes others. screensToUpdate.Clear(); foreach (GameScreen screen in screens) screensToUpdate.Add(screen); bool otherScreenHasFocus = !Game.IsActive; bool coveredByOtherScreen = false; // Loop as long as there are screens waiting to be updated. while (screensToUpdate.Count > 0) { // Pop the topmost screen off the waiting list. GameScreen screen = screensToUpdate[screensToUpdate.Count - 1]; screensToUpdate.RemoveAt(screensToUpdate.Count - 1); // Update the screen. screen.Update(gameTime, otherScreenHasFocus, coveredByOtherScreen); if (screen.ScreenState == ScreenState.TransitionOn || screen.ScreenState == ScreenState.Active) { // If this is the first active screen we came across, // give it a chance to handle input. if (!otherScreenHasFocus) { screen.HandleInput(input); otherScreenHasFocus = true; } // If this is an active non-popup, inform any subsequent // screens that they are covered by it. if (!screen.IsPopup) coveredByOtherScreen = true; } } // Print debug trace? if (traceEnabled) TraceScreens(); #if DEBUG debugSystem.TimeRuler.EndMark("Update"); #endif } /// <summary> /// Prints a list of all the screens, for debugging. /// </summary> void TraceScreens() { List<string> screenNames = new List<string>(); foreach (GameScreen screen in screens) screenNames.Add(screen.GetType().Name); Debug.WriteLine(string.Join(", ", screenNames.ToArray())); } /// <summary> /// Tells each screen to draw itself. /// </summary> public override void Draw(GameTime gameTime) { #if DEBUG debugSystem.TimeRuler.StartFrame(); debugSystem.TimeRuler.BeginMark("Draw", Color.Yellow); #endif foreach (GameScreen screen in screens) { if (screen.ScreenState == ScreenState.Hidden) continue; screen.Draw(gameTime); } #if DEBUG debugSystem.TimeRuler.EndMark("Draw"); #endif #if DEMO SpriteBatch.Begin(); SpriteBatch.DrawString(font, "DEMO - NOT FOR RESALE", new Vector2(20, 80), Color.White); SpriteBatch.End(); #endif } #endregion #region Public Methods /// <summary> /// Adds a new screen to the screen manager. /// </summary> public void AddScreen(GameScreen screen, PlayerIndex? controllingPlayer) { screen.ControllingPlayer = controllingPlayer; screen.ScreenManager = this; screen.IsExiting = false; // If we have a graphics device, tell the screen to load content. if (isInitialized) { screen.LoadContent(); } screens.Add(screen); } /// <summary> /// Removes a screen from the screen manager. You should normally /// use GameScreen.ExitScreen instead of calling this directly, so /// the screen can gradually transition off rather than just being /// instantly removed. /// </summary> public void RemoveScreen(GameScreen screen) { // If we have a graphics device, tell the screen to unload content. if (isInitialized) { screen.UnloadContent(); } screens.Remove(screen); screensToUpdate.Remove(screen); } /// <summary> /// Expose an array holding all the screens. We return a copy rather /// than the real master list, because screens should only ever be added /// or removed using the AddScreen and RemoveScreen methods. /// </summary> public GameScreen[] GetScreens() { return screens.ToArray(); } /// <summary> /// Helper draws a translucent black fullscreen sprite, used for fading /// screens in and out, and for darkening the background behind popups. /// </summary> public void FadeBackBufferToBlack(float alpha) { Viewport viewport = GraphicsDevice.Viewport; spriteBatch.Begin(); spriteBatch.Draw(blankTexture, new Rectangle(0, 0, viewport.Width, viewport.Height), Color.Black * alpha); spriteBatch.End(); } #endregion } } Game Screen Parent of GamePlayScreen #region File Description //----------------------------------------------------------------------------- // GameScreen.cs // // Microsoft XNA Community Game Platform // Copyright (C) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- #endregion #region Using Statements using System; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Input; //using Microsoft.Xna.Framework.Input.Touch; using System.IO; #endregion namespace GameStateManagement { /// <summary> /// Enum describes the screen transition state. /// </summary> public enum ScreenState { TransitionOn, Active, TransitionOff, Hidden, } /// <summary> /// A screen is a single layer that has update and draw logic, and which /// can be combined with other layers to build up a complex menu system. /// For instance the main menu, the options menu, the "are you sure you /// want to quit" message box, and the main game itself are all implemented /// as screens. /// </summary> public abstract class GameScreen { #region Properties /// <summary> /// Normally when one screen is brought up over the top of another, /// the first screen will transition off to make room for the new /// one. This property indicates whether the screen is only a small /// popup, in which case screens underneath it do not need to bother /// transitioning off. /// </summary> public bool IsPopup { get { return isPopup; } protected set { isPopup = value; } } bool isPopup = false; /// <summary> /// Indicates how long the screen takes to /// transition on when it is activated. /// </summary> public TimeSpan TransitionOnTime { get { return transitionOnTime; } protected set { transitionOnTime = value; } } TimeSpan transitionOnTime = TimeSpan.Zero; /// <summary> /// Indicates how long the screen takes to /// transition off when it is deactivated. /// </summary> public TimeSpan TransitionOffTime { get { return transitionOffTime; } protected set { transitionOffTime = value; } } TimeSpan transitionOffTime = TimeSpan.Zero; /// <summary> /// Gets the current position of the screen transition, ranging /// from zero (fully active, no transition) to one (transitioned /// fully off to nothing). /// </summary> public float TransitionPosition { get { return transitionPosition; } protected set { transitionPosition = value; } } float transitionPosition = 1; /// <summary> /// Gets the current alpha of the screen transition, ranging /// from 1 (fully active, no transition) to 0 (transitioned /// fully off to nothing). /// </summary> public float TransitionAlpha { get { return 1f - TransitionPosition; } } /// <summary> /// Gets the current screen transition state. /// </summary> public ScreenState ScreenState { get { return screenState; } protected set { screenState = value; } } ScreenState screenState = ScreenState.TransitionOn; /// <summary> /// There are two possible reasons why a screen might be transitioning /// off. It could be temporarily going away to make room for another /// screen that is on top of it, or it could be going away for good. /// This property indicates whether the screen is exiting for real: /// if set, the screen will automatically remove itself as soon as the /// transition finishes. /// </summary> public bool IsExiting { get { return isExiting; } protected internal set { isExiting = value; } } bool isExiting = false; /// <summary> /// Checks whether this screen is active and can respond to user input. /// </summary> public bool IsActive { get { return !otherScreenHasFocus && (screenState == ScreenState.TransitionOn || screenState == ScreenState.Active); } } bool otherScreenHasFocus; /// <summary> /// Gets the manager that this screen belongs to. /// </summary> public ScreenManager ScreenManager { get { return screenManager; } internal set { screenManager = value; } } ScreenManager screenManager; public KeyboardState KeyboardState { get {return Keyboard.GetState();} } /// <summary> /// Gets the index of the player who is currently controlling this screen, /// or null if it is accepting input from any player. This is used to lock /// the game to a specific player profile. The main menu responds to input /// from any connected gamepad, but whichever player makes a selection from /// this menu is given control over all subsequent screens, so other gamepads /// are inactive until the controlling player returns to the main menu. /// </summary> public PlayerIndex? ControllingPlayer { get { return controllingPlayer; } internal set { controllingPlayer = value; } } PlayerIndex? controllingPlayer; /// <summary> /// Gets whether or not this screen is serializable. If this is true, /// the screen will be recorded into the screen manager's state and /// its Serialize and Deserialize methods will be called as appropriate. /// If this is false, the screen will be ignored during serialization. /// By default, all screens are assumed to be serializable. /// </summary> public bool IsSerializable { get { return isSerializable; } protected set { isSerializable = value; } } bool isSerializable = true; #endregion #region Initialization /// <summary> /// Load graphics content for the screen. /// </summary> public virtual void LoadContent() { } /// <summary> /// Unload content for the screen. /// </summary> public virtual void UnloadContent() { } #endregion #region Update and Draw /// <summary> /// Allows the screen to run logic, such as updating the transition position. /// Unlike HandleInput, this method is called regardless of whether the screen /// is active, hidden, or in the middle of a transition. /// </summary> public virtual void Update(GameTime gameTime, bool otherScreenHasFocus, bool coveredByOtherScreen) { this.otherScreenHasFocus = otherScreenHasFocus; if (isExiting) { // If the screen is going away to die, it should transition off. screenState = ScreenState.TransitionOff; if (!UpdateTransition(gameTime, transitionOffTime, 1)) { // When the transition finishes, remove the screen. ScreenManager.RemoveScreen(this); } } else if (coveredByOtherScreen) { // If the screen is covered by another, it should transition off. if (UpdateTransition(gameTime, transitionOffTime, 1)) { // Still busy transitioning. screenState = ScreenState.TransitionOff; } else { // Transition finished! screenState = ScreenState.Hidden; } } else { // Otherwise the screen should transition on and become active. if (UpdateTransition(gameTime, transitionOnTime, -1)) { // Still busy transitioning. screenState = ScreenState.TransitionOn; } else { // Transition finished! screenState = ScreenState.Active; } } } /// <summary> /// Helper for updating the screen transition position. /// </summary> bool UpdateTransition(GameTime gameTime, TimeSpan time, int direction) { // How much should we move by? float transitionDelta; if (time == TimeSpan.Zero) transitionDelta = 1; else transitionDelta = (float)(gameTime.ElapsedGameTime.TotalMilliseconds / time.TotalMilliseconds); // Update the transition position. transitionPosition += transitionDelta * direction; // Did we reach the end of the transition? if (((direction < 0) && (transitionPosition <= 0)) || ((direction > 0) && (transitionPosition >= 1))) { transitionPosition = MathHelper.Clamp(transitionPosition, 0, 1); return false; } // Otherwise we are still busy transitioning. return true; } /// <summary> /// Allows the screen to handle user input. Unlike Update, this method /// is only called when the screen is active, and not when some other /// screen has taken the focus. /// </summary> public virtual void HandleInput(InputState input) { } public KeyboardState currentKeyState; public KeyboardState lastKeyState; public bool IsKeyHit(Keys key) { if (currentKeyState.IsKeyDown(key) && lastKeyState.IsKeyUp(key)) return true; return false; } /// <summary> /// This is called when the screen should draw itself. /// </summary> public virtual void Draw(GameTime gameTime) { } #endregion #region Public Methods /// <summary> /// Tells the screen to serialize its state into the given stream. /// </summary> public virtual void Serialize(Stream stream) { } /// <summary> /// Tells the screen to deserialize its state from the given stream. /// </summary> public virtual void Deserialize(Stream stream) { } /// <summary> /// Tells the screen to go away. Unlike ScreenManager.RemoveScreen, which /// instantly kills the screen, this method respects the transition timings /// and will give the screen a chance to gradually transition off. /// </summary> public void ExitScreen() { if (TransitionOffTime == TimeSpan.Zero) { // If the screen has a zero transition time, remove it immediately. ScreenManager.RemoveScreen(this); } else { // Otherwise flag that it should transition off and then exit. isExiting = true; } } #endregion #region Helper Methods /// <summary> /// A helper method which loads assets using the screen manager's /// associated game content loader. /// </summary> /// <typeparam name="T">Type of asset.</typeparam> /// <param name="assetName">Asset name, relative to the loader root /// directory, and not including the .xnb extension.</param> /// <returns></returns> public T Load<T>(string assetName) { return ScreenManager.Game.Content.Load<T>(assetName); } #endregion } }

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• Configuring Oracle iPlanet WebServer / Oracle Traffic Director to use crypto accelerators on T4-1 servers

  - by mv

  Configuring Oracle iPlanet Web Server / Oracle Traffic Director to use crypto accelerators on T4-1 servers Jyri had written a technical article on Configuring Solaris Cryptographic Framework and Sun Java System Web Server 7 on Systems With UltraSPARC T1 Processors. I tried to find out what has changed since then in T4. I have used a T4-1 SPARC system with Solaris 10. Results slightly vary for Solaris 11.  For Solaris 11, the T4 optimization was implemented in libsoftcrypto.so while it was in pkcs11_softtoken_extra.so for Solaris 10. Overview of T4 processors is here in this blog. Many thanx to Chi-Chang Lin and Julien for their help. 1. Install Oracle iPlanet Web Server / Oracle Traffic Director.  Go to instance/config directory.  # cd /opt/oracle/webserver7/https-hostname.fqdn/config 2. List default PKCS#11 Modules # ../../bin/modutil -dbdir . -listListing of PKCS #11 Modules-----------------------------------------------------------1. NSS Internal PKCS #11 Moduleslots: 2 slots attachedstatus: loadedslot: NSS Internal Cryptographic Servicestoken: NSS Generic Crypto Servicesslot: NSS User Private Key and Certificate Servicestoken: NSS Certificate DB2. Root Certslibrary name: libnssckbi.soslots: 1 slot attachedstatus: loadedslot: NSS Builtin Objectstoken: Builtin Object Token----------------------------------------------------------- 3. Initialize the soft token data store in the $HOME/.sunw/pkcs11_softtoken/ directory # pktool setpin keystore=pkcs11Enter token passphrase: olderpasswordCreate new passphrase: passwordRe-enter new passphrase: passwordPassphrase changed. 4. Offload crypto operations to Solaris Crypto Framework on T4 $ ../../bin/modutil -dbdir . -nocertdb -add SCF -libfile /usr/lib/libpkcs11.so -mechanisms RSA:AES:SHA1:MD5 Module "SCF" added to database. Note that -nocertdb means modutil won't try to open the NSS softoken key database. It doesn't even have to be present. PKCS#11 library used is /usr/lib/libpkcs11.so. If the server is running in 64 bit mode, we have to use /usr/lib/64/libpkcs11.so Unlike T1 and T2, in T4 we do not have to disable mechanisms in softtoken provider using cryptoadm. 5. List again to check that a new module SCF is added # ../../bin/modutil -dbdir . -list Listing of PKCS #11 Modules-----------------------------------------------------------1. NSS Internal PKCS #11 Moduleslots: 2 slots attachedstatus: loadedslot: NSS Internal Cryptographic Servicestoken: NSS Generic Crypto Servicesslot: NSS User Private Key and Certificate Servicestoken: NSS Certificate DB2. SCFlibrary name: /usr/lib/libpkcs11.soslots: 2 slots attachedstatus: loadedslot: Sun Metaslottoken: Sun Metaslotslot: n2rng/0 SUNW_N2_Random_Number_Generator token: n2rng/0 SUNW_N2_RNG 3. Root Certs library name: libnssckbi.so slots: 1 slot attached status: loaded slot: NSS Builtin Objects token: Builtin Object Token----------------------------------------------------------- 6.  Create certificate in “Sun Metaslot” : I have used certutil, but you must use Admin Server CLI / GUI # ../../bin/certutil -S -x -n "Server-Cert" -t "CT,CT,CT" -s "CN=*.fqdn" -d . -h "Sun Metaslot"Enter Password or Pin for "Sun Metaslot": password 7. Verify that the certificate is created properly in “Sun Metslaot” # ../../bin/certutil -L -d . -h "Sun Metaslot"Certificate Nickname Trust AttributesSSL,S/MIME,JAR/XPIEnter Password or Pin for "Sun Metaslot": passwordSun Metaslot:Server-Cert CTu,Cu,Cu# 8. Associate this newly created certificate to http listener using Admin CLI/GUI. After that server.xml should have <http-listener> ...    <ssl>        <server-cert-nickname>Sun Metaslot:Server-Cert</server-cert-nicknamer>    </ssl> Note the prefix "Sun Metaslot" 9. Disable PKCS#11 bypass To use the accelerated AES algorithm, turn off PKCS#11 bypass, and configure modutil to have the AES mechanism go to the Metaslot. After you disable PKCS#11 bypasss using Admin GUI/CLI,  check that server.xml should have <server> ....    <pkcs11>         <enabled>1</enabled>         <allow-bypass>0</allow-bypass>     </pkcs11> With PKCS#11 bypass enabled, Oracle iPlanet Web Server will only use the RSA capability of the T4, provided certificate and key are stored in the T4 slot (Metaslot). Actually, the RSA op is never bypassed in NSS, it's always done with PKCS#11 calls. So the bypass settings won't affect the behavior of the probes for RSA at all. The only thing that matters if where the RSA key and certificate live, ie. which PKCS#11 token, and thus which PKCS#11 module gets called to do the work. If your certificate/key are in the NSS certificate/key db, you will see libsoftokn3/libfreebl libraries doing the RSA work. If they are in the Sun Metaslot, it should be the Solaris code. 10. Start the server instance # ../bin/startserv Oracle iPlanet Web Server 7.0.16 B09/14/2012 03:33Please enter the PIN for the "Sun Metaslot" token: password...info: HTTP3072: http-listener-1: https://hostname.fqdn:80 ready to accept requestsinfo: CORE3274: successful server startup 11. Figure out which process to run this DTrace script on # ps -eaf | grep webservd | grep -v dogwebservd 18224 18223 0 13:17:25 ? 0:07 webservd -d /opt/oracle/webserver7/https-hostname.fqdn/config -r /opt/root 18225 18224 0 13:17:25 ? 0:00 webservd -d /opt/oracle/webserver7/https-hostname.fqdn/config -r /opt/ (For Oracle Traffic Director look for process named "trafficd") We see that the child process id is “18225” 12. Clients for testing : You can use any browser. I used NSS tool tstclnt for testing $cat > req.txtGET /index.html HTTP/1.0 For checking both RSA and AES, I used cipher “:0035” which is TLS_RSA_WITH_AES_256_CBC_SHA $./tstclnt -h hostname -p 80 -d . -T -f -o -v -c “:0035” < req.txt 13. How do I make sure that crypto accelerator is being used 13.1 Create DTrace script The following D script should be able to uncover whether T4-specific crypto routine are being called or not. It also displays stats per second. # cat > t4crypto.d#!/usr/sbin/dtrace -spid$target::*rsa*:entry,pid$target::*yf*:entry{    @ops[probemod, probefunc] = count();}tick-1sec{    printa(@ops);    trunc(@ops);} Invoke with './t4crypto.d -p <pid> ' 13.2 EXPECTED PROBES FOR Solaris 10 : If offloading to T4 HW are correctly set up, the expected DTrace output would have these probes and libraries library Operations PROBES pkcs11_softtoken_extra.so RSA soft_decrypt_rsa_pkcs_decode, soft_encrypt_rsa_pkcs_encode soft_rsa_crypt_init_common soft_rsa_decrypt, soft_rsa_encrypt soft_rsa_decrypt_common, soft_rsa_encrypt_common AES yf_aes_instructions_present yf_aes_expand256, yf_aes256_cbc_decrypt, yf_aes256_cbc_encrypt, yf_aes256_load_keys_for_decrypt, yf_aes256_load_keys_for_encrypt, Note that these are for 256, same for 128, 192... these are for cbc, same for ecb, ctr, cfb128... DES yf_des_expand, yf_des_instructions_present yf_des_encrypt libmd_psr.so MD5 yf_md5_multiblock, yf_md5_instruction_present SHA1 yf_sha1_instruction_present, yf_sha1_multibloc 13.3 SAMPLE OUTPUT FOR CIPHER TLS_RSA_WITH_AES_256_CBC_SHA (0x0035) ON T4 SPARC SOLARIS 10 WITHOUT PKCS#11 BYPASS # ./t4crypto.d -p 18225 pkcs11_softtoken_extra.so.1   soft_decrypt_rsa_pkcs_decode    1 pkcs11_softtoken_extra.so.1   soft_rsa_crypt_init_common      1 pkcs11_softtoken_extra.so.1   soft_rsa_decrypt                1 pkcs11_softtoken_extra.so.1   big_mp_mul_yf                   2 pkcs11_softtoken_extra.so.1   mpm_yf_mpmul                    2 pkcs11_softtoken_extra.so.1   mpmul_arr_yf                    2 pkcs11_softtoken_extra.so.1   rijndael_key_setup_enc_yf       2 pkcs11_softtoken_extra.so.1   soft_rsa_decrypt_common         2 pkcs11_softtoken_extra.so.1   yf_aes_expand256                2 pkcs11_softtoken_extra.so.1   yf_aes256_cbc_decrypt           3 pkcs11_softtoken_extra.so.1   yf_aes256_load_keys_for_decrypt 3 pkcs11_softtoken_extra.so.1   big_mont_mul_yf                 6 pkcs11_softtoken_extra.so.1   mm_yf_montmul                   6 pkcs11_softtoken_extra.so.1   yf_des_instructions_present     6 pkcs11_softtoken_extra.so.1   yf_aes256_cbc_encrypt           8 pkcs11_softtoken_extra.so.1   yf_aes256_load_keys_for_encrypt 8 pkcs11_softtoken_extra.so.1   yf_mpmul_present                8 pkcs11_softtoken_extra.so.1   yf_aes_instructions_present    13 pkcs11_softtoken_extra.so.1   yf_des_encrypt                 18 libmd_psr.so.1                yf_md5_multiblock              41 libmd_psr.so.1                yf_md5_instruction_present     72 libmd_psr.so.1                yf_sha1_instruction_present    82 libmd_psr.so.1                yf_sha1_multiblock             82 This indicates that both RSA and AES ops are done in Solaris Crypto Framework. 13.4 SAMPLE OUTPUT FOR CIPHER TLS_RSA_WITH_AES_256_CBC_SHA (0x0035) ON T4 SPARC SOLARIS 10 WITH PKCS#11 BYPASS # ./t4crypto.d -p 18225 pkcs11_softtoken_extra.so.1   soft_decrypt_rsa_pkcs_decode 1 pkcs11_softtoken_extra.so.1   soft_rsa_crypt_init_common   1 pkcs11_softtoken_extra.so.1   soft_rsa_decrypt             1 pkcs11_softtoken_extra.so.1   soft_rsa_decrypt_common      1 pkcs11_softtoken_extra.so.1   big_mp_mul_yf                2 pkcs11_softtoken_extra.so.1   mpm_yf_mpmul                 2 pkcs11_softtoken_extra.so.1   mpmul_arr_yf                 2 pkcs11_softtoken_extra.so.1   big_mont_mul_yf              6 pkcs11_softtoken_extra.so.1   mm_yf_montmul                6 pkcs11_softtoken_extra.so.1   yf_mpmul_present             8 For this cipher, when I enable PKCS#11 bypass, Only RSA probes are being hit AES probes are not being hit. 13.5 ustack() for RSA operations / probefunc == "soft_rsa_decrypt" / Shows that libnss3.so is calling C_* functions of libpkcs11.so which is calling functions of pkcs11_softtoken_extra.so for both cases with and without bypass. When PKCS#11 bypass is disabled (allow-bypass is 0) pkcs11_softtoken_extra.so.1`soft_rsa_decrypt pkcs11_softtoken_extra.so.1`soft_rsa_decrypt_common+0x94 pkcs11_softtoken_extra.so.1`soft_unwrapkey+0x258 pkcs11_softtoken_extra.so.1`C_UnwrapKey+0x1ec libpkcs11.so.1`meta_unwrap_key+0x17c libpkcs11.so.1`meta_UnwrapKey+0xc4 libpkcs11.so.1`C_UnwrapKey+0xfc libnss3.so`pk11_AnyUnwrapKey+0x6b8 libnss3.so`PK11_PubUnwrapSymKey+0x8c libssl3.so`ssl3_HandleRSAClientKeyExchange+0x1a0 libssl3.so`ssl3_HandleClientKeyExchange+0x154 libssl3.so`ssl3_HandleHandshakeMessage+0x440 libssl3.so`ssl3_HandleHandshake+0x11c libssl3.so`ssl3_HandleRecord+0x5e8 libssl3.so`ssl3_GatherCompleteHandshake+0x5c libssl3.so`ssl_GatherRecord1stHandshake+0x30 libssl3.so`ssl_Do1stHandshake+0xec libssl3.so`ssl_SecureRecv+0x1c8 libssl3.so`ssl_Recv+0x9c libns-httpd40.so`__1cNDaemonSessionDrun6M_v_+0x2dc When PKCS#11 bypass is enabled (allow-bypass is 1) pkcs11_softtoken_extra.so.1`soft_rsa_decrypt pkcs11_softtoken_extra.so.1`soft_rsa_decrypt_common+0x94 pkcs11_softtoken_extra.so.1`C_Decrypt+0x164 libpkcs11.so.1`meta_do_operation+0x27c libpkcs11.so.1`meta_Decrypt+0x4c libpkcs11.so.1`C_Decrypt+0xcc libnss3.so`PK11_PrivDecryptPKCS1+0x1ac libssl3.so`ssl3_HandleRSAClientKeyExchange+0xe4 libssl3.so`ssl3_HandleClientKeyExchange+0x154 libssl3.so`ssl3_HandleHandshakeMessage+0x440 libssl3.so`ssl3_HandleHandshake+0x11c libssl3.so`ssl3_HandleRecord+0x5e8 libssl3.so`ssl3_GatherCompleteHandshake+0x5c libssl3.so`ssl_GatherRecord1stHandshake+0x30 libssl3.so`ssl_Do1stHandshake+0xec libssl3.so`ssl_SecureRecv+0x1c8 libssl3.so`ssl_Recv+0x9c libns-httpd40.so`__1cNDaemonSessionDrun6M_v_+0x2dc libnsprwrap.so`ThreadMain+0x1c libnspr4.so`_pt_root+0xe8 13.6 ustack() FOR AES operations / probefunc == "yf_aes256_cbc_encrypt" / When PKCS#11 bypass is disabled (allow-bypass is 0) pkcs11_softtoken_extra.so.1`yf_aes256_cbc_encrypt pkcs11_softtoken_extra.so.1`aes_block_process_contiguous_whole_blocks+0xb4 pkcs11_softtoken_extra.so.1`aes_crypt_contiguous_blocks+0x1cc pkcs11_softtoken_extra.so.1`soft_aes_encrypt_common+0x22c pkcs11_softtoken_extra.so.1`C_EncryptUpdate+0x10c libpkcs11.so.1`meta_do_operation+0x1fc libpkcs11.so.1`meta_EncryptUpdate+0x4c libpkcs11.so.1`C_EncryptUpdate+0xcc libnss3.so`PK11_CipherOp+0x1a0 libssl3.so`ssl3_CompressMACEncryptRecord+0x264 libssl3.so`ssl3_SendRecord+0x300 libssl3.so`ssl3_FlushHandshake+0x54 libssl3.so`ssl3_SendFinished+0x1fc libssl3.so`ssl3_HandleFinished+0x314 libssl3.so`ssl3_HandleHandshakeMessage+0x4ac libssl3.so`ssl3_HandleHandshake+0x11c libssl3.so`ssl3_HandleRecord+0x5e8 libssl3.so`ssl3_GatherCompleteHandshake+0x5c libssl3.so`ssl_GatherRecord1stHandshake+0x30 libssl3.so`ssl_Do1stHandshake+0xec Shows that libnss3.so is calling C_* functions of libpkcs11.so which is calling functions of pkcs11_softtoken_extra.so However when PKCS#11 bypass is disabled (allow-bypass is 1) this stack isn't getting called. 14. LIST OF ALL THE PROBES MATCHED BY D SCRIPT FOR REFERENCE # ./t4crypto.d -p 18225 -l ID PROVIDER MODULE FUNCTION NAME ... 55720 pid18225 libmd_psr.so.1 yf_md5_instruction_present entry 55721 pid18225 libmd_psr.so.1 yf_sha256_instruction_present entry 55722 pid18225 libmd_psr.so.1 yf_sha512_instruction_present entry 55723 pid18225 libmd_psr.so.1 yf_sha1_instruction_present entry 55724 pid18225 libmd_psr.so.1 yf_sha256 entry 55725 pid18225 libmd_psr.so.1 yf_sha256_multiblock entry 55726 pid18225 libmd_psr.so.1 yf_sha512 entry 55727 pid18225 libmd_psr.so.1 yf_sha512_multiblock entry 55728 pid18225 libmd_psr.so.1 yf_sha1 entry 55729 pid18225 libmd_psr.so.1 yf_sha1_multiblock entry 55730 pid18225 libmd_psr.so.1 yf_md5 entry 55731 pid18225 libmd_psr.so.1 yf_md5_multiblock entry 55732 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_instructions_present entry 55733 pid18225 pkcs11_softtoken_extra.so.1 rijndael_key_setup_enc_yf entry 55734 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_expand128 entry 55735 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_encrypt128 entry 55736 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_decrypt128 entry 55737 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_expand192 entry 55738 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_encrypt192 entry 55739 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_decrypt192 entry 55740 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_expand256 entry 55741 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_encrypt256 entry 55742 pid18225 pkcs11_softtoken_extra.so.1 yf_aes_decrypt256 entry 55743 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_load_keys_for_encrypt entry 55744 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_load_keys_for_encrypt entry 55745 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_load_keys_for_encrypt entry 55746 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_ecb_encrypt entry 55747 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_ecb_encrypt entry 55748 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_ecb_encrypt entry 55749 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_cbc_encrypt entry 55750 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_cbc_encrypt entry 55751 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_cbc_encrypt entry 55752 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_ctr_crypt entry 55753 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_ctr_crypt entry 55754 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_ctr_crypt entry 55755 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_cfb128_encrypt entry 55756 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_cfb128_encrypt entry 55757 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_cfb128_encrypt entry 55758 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_load_keys_for_decrypt entry 55759 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_load_keys_for_decrypt entry 55760 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_load_keys_for_decrypt entry 55761 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_ecb_decrypt entry 55762 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_ecb_decrypt entry 55763 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_ecb_decrypt entry 55764 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_cbc_decrypt entry 55765 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_cbc_decrypt entry 55766 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_cbc_decrypt entry 55767 pid18225 pkcs11_softtoken_extra.so.1 yf_aes128_cfb128_decrypt entry 55768 pid18225 pkcs11_softtoken_extra.so.1 yf_aes192_cfb128_decrypt entry 55769 pid18225 pkcs11_softtoken_extra.so.1 yf_aes256_cfb128_decrypt entry 55771 pid18225 pkcs11_softtoken_extra.so.1 yf_des_instructions_present entry 55772 pid18225 pkcs11_softtoken_extra.so.1 yf_des_expand entry 55773 pid18225 pkcs11_softtoken_extra.so.1 yf_des_encrypt entry 55774 pid18225 pkcs11_softtoken_extra.so.1 yf_mpmul_present entry 55775 pid18225 pkcs11_softtoken_extra.so.1 yf_montmul_present entry 55776 pid18225 pkcs11_softtoken_extra.so.1 mm_yf_montmul entry 55777 pid18225 pkcs11_softtoken_extra.so.1 mm_yf_montsqr entry 55778 pid18225 pkcs11_softtoken_extra.so.1 mm_yf_restore_func entry 55779 pid18225 pkcs11_softtoken_extra.so.1 mm_yf_ret_from_mont_func entry 55780 pid18225 pkcs11_softtoken_extra.so.1 mm_yf_execute_slp entry 55781 pid18225 pkcs11_softtoken_extra.so.1 big_modexp_ncp_yf entry 55782 pid18225 pkcs11_softtoken_extra.so.1 big_mont_mul_yf entry 55783 pid18225 pkcs11_softtoken_extra.so.1 mpmul_arr_yf entry 55784 pid18225 pkcs11_softtoken_extra.so.1 big_mp_mul_yf entry 55785 pid18225 pkcs11_softtoken_extra.so.1 mpm_yf_mpmul entry 55786 pid18225 libns-httpd40.so nsapi_rsa_set_priv_fn entry ... 55795 pid18225 libnss3.so prepare_rsa_priv_key_export_for_asn1 entry 55796 pid18225 libresolv.so.2 sunw_dst_rsaref_init entry 55797 pid18225 libnssutil3.so NSS_Get_SEC_UniversalStringTemplate entry ... 55813 pid18225 libsoftokn3.so prepare_low_rsa_priv_key_for_asn1 entry 55814 pid18225 libsoftokn3.so rsa_FormatOneBlock entry 55815 pid18225 libsoftokn3.so rsa_FormatBlock entry 55816 pid18225 libnssdbm3.so lg_prepare_low_rsa_priv_key_for_asn1 entry 55817 pid18225 libfreebl_32fpu_3.so rsa_build_from_primes entry 55818 pid18225 libfreebl_32fpu_3.so rsa_is_prime entry 55819 pid18225 libfreebl_32fpu_3.so rsa_get_primes_from_exponents entry 55820 pid18225 libfreebl_32fpu_3.so rsa_PrivateKeyOpNoCRT entry 55821 pid18225 libfreebl_32fpu_3.so rsa_PrivateKeyOpCRTNoCheck entry 55822 pid18225 libfreebl_32fpu_3.so rsa_PrivateKeyOpCRTCheckedPubKey entry 55823 pid18225 pkcs11_kernel.so.1 key_gen_rsa_by_value entry 55824 pid18225 pkcs11_kernel.so.1 get_rsa_private_key entry 55825 pid18225 pkcs11_kernel.so.1 get_rsa_public_key entry 55826 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_encrypt entry 55827 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_decrypt entry 55828 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_crypt_init_common entry 55829 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_encrypt_common entry 55830 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_decrypt_common entry 55831 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_sign_verify_init_common entry 55832 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_sign_common entry 55833 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_verify_common entry 55834 pid18225 pkcs11_softtoken_extra.so.1 generate_rsa_key entry 55835 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_genkey_pair entry 55836 pid18225 pkcs11_softtoken_extra.so.1 get_rsa_sha1_prefix entry 55837 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_digest_sign_common entry 55838 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_digest_verify_common entry 55839 pid18225 pkcs11_softtoken_extra.so.1 soft_rsa_verify_recover entry 55840 pid18225 pkcs11_softtoken_extra.so.1 rsa_pri_to_asn1 entry 55841 pid18225 pkcs11_softtoken_extra.so.1 asn1_to_rsa_pri entry 55842 pid18225 pkcs11_softtoken_extra.so.1 soft_encrypt_rsa_pkcs_encode entry 55843 pid18225 pkcs11_softtoken_extra.so.1 soft_decrypt_rsa_pkcs_decode entry 55844 pid18225 pkcs11_softtoken_extra.so.1 soft_sign_rsa_pkcs_encode entry 55845 pid18225 pkcs11_softtoken_extra.so.1 soft_verify_rsa_pkcs_decode entry 55770 profile tick-1sec

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• SQL SERVER – DMV – sys.dm_os_waiting_tasks and sys.dm_exec_requests – Wait Type – Day 4 of 28

  - by pinaldave

  Previously, we covered the DMV sys.dm_os_wait_stats, and also saw how it can be useful to identify the major resource bottleneck. However, at the same time, we discussed that this is only useful when we are looking at an instance-level picture. Quite often we want to know about the processes going in our server at the given instant. Here is the query for the same. This DMV is written taking the following into consideration: we want to analyze the queries that are currently running or which have recently ran and their plan is still in the cache. SELECT dm_ws.wait_duration_ms, dm_ws.wait_type, dm_es.status, dm_t.TEXT, dm_qp.query_plan, dm_ws.session_ID, dm_es.cpu_time, dm_es.memory_usage, dm_es.logical_reads, dm_es.total_elapsed_time, dm_es.program_name, DB_NAME(dm_r.database_id) DatabaseName, -- Optional columns dm_ws.blocking_session_id, dm_r.wait_resource, dm_es.login_name, dm_r.command, dm_r.last_wait_type FROM sys.dm_os_waiting_tasks dm_ws INNER JOIN sys.dm_exec_requests dm_r ON dm_ws.session_id = dm_r.session_id INNER JOIN sys.dm_exec_sessions dm_es ON dm_es.session_id = dm_r.session_id CROSS APPLY sys.dm_exec_sql_text (dm_r.sql_handle) dm_t CROSS APPLY sys.dm_exec_query_plan (dm_r.plan_handle) dm_qp WHERE dm_es.is_user_process = 1 GO You can change CROSS APPLY to OUTER APPLY if you want to see all the details which are omitted because of the plan cache. Let us analyze the result of the above query and see how it can be helpful to identify the query and the kind of wait type it creates. Click to Enlarage The above query will return various columns. There are various columns that provide very important details. e.g. wait_duration_ms – it indicates current wait for the query that executes at that point of time. wait_type – it indicates the current wait type for the query text – indicates the query text query_plan – when clicked on the same, it will display the query plans There are many other important information like CPU_time, memory_usage, and logical_reads, which can be read from the query as well. In future posts on this series, we will see how once identified wait type we can attempt to reduce the same. Read all the post in the Wait Types and Queue series. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: DMV, Pinal Dave, PostADay, SQL, SQL Authority, SQL DMV, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, SQL Wait Stats, SQL Wait Types, T SQL, Technology

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• First impressions of Scala

  - by Scott Weinstein

  I have an idea that it may be possible to predict build success/failure based on commit data. Why Scala? It’s a JVM language, has lots of powerful type features, and it has a linear algebra library which I’ll need later. Project definition and build Neither maven or the scala build tool (sbt) are completely satisfactory. This maven **archetype** (what .Net folks would call a VS project template) mvn archetype:generate `-DarchetypeGroupId=org.scala-tools.archetypes `-DarchetypeArtifactId=scala-archetype-simple `-DremoteRepositories=http://scala-tools.org/repo-releases `-DgroupId=org.SW -DartifactId=BuildBreakPredictor gets you started right away with “hello world” code, unit tests demonstrating a number of different testing approaches, and even a ready made `.gitignore` file - nice! But the Scala version is behind at v2.8, and more seriously, compiling and testing was painfully slow. So much that a rapid edit – test – edit cycle was not practical. So Lab49 colleague Steve Levine tells me that I can either adjust my pom to use fsc – the fast scala compiler, or use sbt. Sbt has some nice features It’s fast – it uses fsc by default It has a continuous mode, so  `> ~test` will compile and run your unit test each time you save a file It’s can consume (and produce) Maven 2 dependencies the build definition file can be much shorter than the equivalent pom (about 1/5 the size, as repos and dependencies can be declared on a single line) And some real limitations Limited support for 3rd party integration – for instance out of the box, TeamCity doesn’t speak sbt, nor does IntelliJ IDEA Steeper learning curve for build steps outside the default Side note: If a language has a fast compiler, why keep the slow compiler around? Even worse, why make it the default? I choose sbt, for the faster development speed it offers. Syntax Scala APIs really like to use punctuation – sometimes this works well, as in the following map1 |+| map2 The `|+|` defines a merge operator which does addition on the `values` of the maps. It’s less useful here: http(baseUrl / url >- parseJson[BuildStatus] sure you can probably guess what `>-` does from the context, but how about `>~` or `>+`? Language features I’m still learning, so not much to say just yet. However case classes are quite usefull, implicits scare me, and type constructors have lots of power. Community A number of projects, such as https://github.com/scalala and https://github.com/scalaz/scalaz are split between github and google code – github for the src, and google code for the docs. Not sure I understand the motivation here.

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• My thoughts on the future of the web with respect to flash, plugins, etc…

  - by joelvarty

  More than 10 years ago I was coding Java applets.  They were great at the time because I could reasonably expect them to run the same way in Netscape and Internet Explorer.  I could also reliably do asynchronous networking back to the server.  But then, Microsoft pulled their native Java runtime from Windows and Internet Explorer.  It got a lot harder to get applets running in people’s browsers. So I started writing ActiveX controls for IE and Java applets for Netscape. Then I switched to Flash, not for too long, but it was enough for me to see that it was a capable and curious implementation of animation, multimedia and script. I even wrote a few Silverlight controls, but then I stopped. I stepped back from all of the “richness” and “interactivity” and I thought about things like accessibility and SEO.  I wondered how my apps and sites might appear to the greater world.  I wondered how the developers I am working with, or who might be inheriting my code down the road, might interact with it. And I thought to myself, What the hell was I thinking? Those embedded controls are not what the web is about, and they run contrary to nearly all of the things that makes the web exciting and fosters innovation within and around.   Those plugins or controls, or whatever you want to refer to them as, are only stop-gaps that fill a hole in the basic HTML/Script/CSS specifications, and that’s all they should ever be used for.  Full stop.  Period.  For instance, I still make use of a nifty little flash control called SWFUpload because it lets me check file size before an upload starts.  I can do the same thing from a Silverlight control.  But rest assured, if I could do this from native javascript, I would in a second.  In fact, the only reason I chose SWFUpload over a ton of other alternatives is that it has a great javascript API so I can do (nearly) all of the UI in regular HTML.  And I ALWAYS provide a non-flash alternative for uploading, and for the rest of any website where the designer has insisted on some piece of creativity that requires flash (usually because the designer is also the flash developer, but that’s an aside…). The web is about openness, and about exposing that openness in such a way that it can be taken advantage of as a small part of a greater whole.  Sure we need security and authentication and ssl and all that stuff, but for me, its something more profound.  For me, the majority of what the web is, is about exposing something that delivers meaning.  What meaning can we derive from an <object> tag?   more later - joel

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• Error trapping for a missing data source in a Spring MVC / Spring JDBC web app [migrated]

  - by Geeb

  I have written a web app that uses Spring MVC libraries and Spring JDBC to connect to an Oracle DB. (I don't use any ORM type libraries as I create stored procedures on Oracle that do my stuff and I'm quite happy with that.) I use a connection pool to Oracle managed by the Tomcat container The app generally works absolutely fine by the way! BUT... I noticed the other day when I tried to set up the app on another Tomcat instance that I had forgotten to configure the connection pool and obviously the app could not get hold of an org.apache.commons.dbcp.BasicDataSource object, so it crashed. I define the pool params in the tomcat "context.conf" In my "web.xml" I have: <servlet> <servlet-name>appServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/Spring/appServlet/servlet-context.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>appServlet</servlet-name> <!-- Map *everything* to appServlet --> <url-pattern>/</url-pattern> </servlet-mapping> <resource-ref> <description>Oracle Datasource example</description> <res-ref-name>jdbc/ora1</res-ref-name> <res-type>org.apache.commons.dbcp.BasicDataSource</res-type> <res-auth>Container</res-auth> </resource-ref> And I have a Spring "servlet-context.xml" where JNDI is used to map the data source object provided by the connection pool to a Spring bean with the ID of "dataSource": <jee:jndi-lookup id="dataSource" jndi-name="java:comp/env/jdbc/ora1" resource-ref="true" /> Here's the question: Where do I trap the case where the database cannot be accessed for whatever reason? I don't want the user to see a yard-and-a-half of Java stack trace in their browser, rather a nicer message that tells them there is a database problem etc. It seems that my app tries to configure the "dataSource" bean (in "servlet-context.xml") before any code has tested it can actually provide a dataSource object from the pool?! Maybe I'm not fully understanding exactly what is going on in these stages of the app firing up ... Thanks for any advice!

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