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  • Deriving a class from an abstract class (C++)

    - by cemregoksu
    I have an abstract class with a pure virtual function f() and i want to create a class inherited from that class, and also override function f(). I seperated the header file and the cpp file. I declared the function f(int) in the header file and the definition is in the cpp file. However, the compiler says the derived class is still abstract. How can i fix it?

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  • java: converting part of a ByteBuffer to a string

    - by Jason S
    I have a ByteBuffer containing bytes that were derived by String.getBytes(charsetName), where "containing" means that the string comprises the entire sequence of bytes between the ByteBuffer's position() and limit(). What's the best way for me to get the string back? (assuming I know the encoding charset) Is there anything better than the following (which seems a little clunky) byte[] ba = new byte[bbuf.remaining()]; bbuf.get(ba); try { String s = new String(ba, charsetName); } catch (UnsupportedEncodingException e) { /* take appropriate action */ }

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  • C++ interview question

    - by benjamin button
    as i am not an expert in c++,i was not aware of the answer to this question asked in one of the interviews. lets say there is a base class pointer which is pointing to a base class object: baseclass *bptr; bptr= new baseclass; now if i do bptr= new derived; what is the problem here?

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  • Attribute vector emptying itself

    - by ravloony
    Hello, I have two classes, derived from a common class. The common class has a pure virtual function called execute(), which is implemented in both derived classes. In the inherited class I have an attribute which is a vector. In both execute() methods I overwrite this vector with a result. I access both classes from a vector of pointers to their objects. The problem is when I try to access the result vector form outside the objects. In one case I can get the elements (which are simply pointers), in the other I cannot, the vector is empty. Code: class E; class A{ protected: vector<E*> _result; public: virtual void execute()=0; vector<E*> get_result(); }; vector<E*> A::get_result() { return _result; } class B : public A { public: virtual void execute(); }; B::execute() { //... _result = tempVec; return; } class C : public A { public: virtual void execute(); }; C::execute() { //different stuff to B _result = tempvec; return; } main() { B* b = new B(); C* c = new C(); b->execute(); c->execute(); b->get_result();//returns full vector c->get_result(); //returns empty vector!! } I have no idea what is going on here... I have tried filling _result by hand from a temp vector in the offending class, doing the same with vector::assign(), nothing works. And the other object works perfectly. I must be missing something.... Any help would be greatly appreciated.

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  • Problem persisting inheritance tree

    - by alaiseca
    I have a problem trying to map an inheritance tree. A simplified version of my model is like this: @MappedSuperclass @Embeddable public class BaseEmbedded implements Serializable { @Column(name="BE_FIELD") private String beField; // Getters and setters follow } @MappedSuperclass @Embeddable public class DerivedEmbedded extends BaseEmbedded { @Column(name="DE_FIELD") private String deField; // Getters and setters follow } @MappedSuperclass public abstract class BaseClass implements Serializable { @Embedded protected BaseEmbedded embedded; public BaseClass() { this.embedded = new BaseEmbedded(); } // Getters and setters follow } @Entity @Table(name="MYTABLE") @Inheritance(strategy=InheritanceType.SINGLE_TABLE) @DiscriminatorColumn(name="TYPE", discriminatorType=DiscriminatorType.STRING) public class DerivedClass extends BaseClass { @Id @Column(name="ID", nullable=false) private Long id; @Column(name="TYPE", nullable=false, insertable=false, updatable=false) private String type; public DerivedClass() { this.embedded = new DerivedClass(); } // Getters and setters follow } @Entity @DiscriminatorValue("A") public class DerivedClassA extends DerivedClass { @Embeddable public static NestedClassA extends DerivedEmbedded { @Column(name="FIELD_CLASS_A") private String fieldClassA; } public DerivedClassA() { this.embedded = new NestedClassA(); } // Getters and setters follow } @Entity @DiscriminatorValue("B") public class DerivedClassB extends DerivedClass { @Embeddable public static NestedClassB extends DerivedEmbedded { @Column(name="FIELD_CLASS_B") private String fieldClassB; } public DerivedClassB() { this.embedded = new NestedClassB(); } // Getters and setters follow } At Java level, this model is working fine, and I believe is the appropriate one. My problem comes up when it's time to persist an object. At runtime, I can create an object which could be an instance of DerivedClass, DerivedClassA or DerivedClassB. As you can see, each one of the derived classes introduces a new field which only makes sense for that specific derived class. All the classes share the same physical table in the database. If I persist an object of type DerivedClass, I expect fields BE_FIELD, DE_FIELD, ID and TYPE to be persisted with their values and the remaining fields to be null. If I persist an object of type DerivedClass A, I expect those same fields plus the FIELD_CLASS_A field to be persisted with their values and field FIELD_CLASS_B to be null. Something equivalent for an object of type DerivedClassB. Since the @Embedded annotation is at the BaseClass only, Hibernate is only persisting the fields up to that level in the tree. I don't know how to tell Hibernate that I want to persist up to the appropriate level in the tree, depending on the actual type of the embedded property. I cannot have another @Embedded property in the subclasses since this would duplicate data that is already present in the superclass and would also break the Java model. I cannot declare the embedded property to be of a more specific type either, since it's only at runtime when the actual object is created and I don't have a single branch in the hierarchy. Is it possible to solve my problem? Or should I resignate myself to accept that there is no way to persist the Java model as it is? Any help will be greatly appreciated.

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  • Calling super()

    - by Mike
    When do you call super() in Java? I see it in some constructors of the derived class, but isn't the constructors for each of the parent class called automatically? Why would you need to use super?

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  • Generic overloading tells me this is the same function. Not agree.

    - by serhio
    base class: Class List(Of T) Function Contains(ByVal value As T) As Boolean derived class: Class Bar : List(Of Exception) ' Exception type as example ' Function Contains(Of U)(ByVal value As U) As Boolean compiler tells me that that two are the same, so I need to declare Overloads/new this second function. But I want use U to differentiate the type (one logic) like NullReferenceException, ArgumentNull Exception, etc. but want to leave the base function(no differentiation by type - other logic) as well.

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  • Pie chart of *nix shell use [closed]

    - by hayk.mart
    I've encountered a situation where it would be very helpful to know the breakdown of shell use by percentage. For example, I'm looking for something like bash: X%, sh: Y%, csh, tcsh, zsh, ksh, dash, etc.. Obviously, I know there are several complications - multiple shells, the definition of "use", uncertainty and so forth, but I would like to see an informed answer derived from actual data and based on some stated metric, even if the result could be horribly wrong. Bonus if there is historical data demonstrating a shift in preferences.

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  • How big in bytes is a DataRow

    - by JeffreyABecker
    I have a one-time process (hashing all our user passwords) written using datasets. The performance needs improvement so we've profiled the application and found that increasing the 'batch size' of the update will improve performance. I also know that if I load the entire data set into memory the application will start hitting swap and slow down. The question is: how big is a System.Data.DataRow derived class? I'd like to calculate a batch size which I know won't force the application into swap.

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  • Nhiberate, multiple tables, same class

    - by jeff
    It's been asked a million times, its like this. Say Invoice is the base class and InvoiceHistory is the class that simply inherits from Invoice. When I do something like invoiceList = session.CreateCriteria(typeof(Invoice)).List(); I get everything from Invoice (that I want, plus everything from InvoiceHistory). Do I need to have an InvoiceBase and create derived versions for Invoice and InvoiceHistory?

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  • Loading material parameteres from FBX in XNA

    - by M_F
    I've got some material parameters stored in the FBX file (DiffuseFactor, ShininessExponent, SpecularFactor and others), but I can't get to them using Effect.Parameters nor BasicEffect (they've got only the basic stuff - like EmmisiveColor or alpha). I know, that I can try to write a Effect-derived class, but is there any other way? A built-in feature or maybe some half-raw parameters stored somewhere?

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  • Java lang object

    - by Neeraj
    why java Object class has two methods hashcode() and equals()? One of them looks redundant and its percolated to the bottom most derived class?

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  • How can I define a constructor in an open generic type?

    - by Cort
    I am trying to create on open generic type that has a constructor to be used by derived types, but I either don't know how to do it or it is not possible -- not sure which. public struct DataType<T> : IDataType { private T myValue; private TypeState myState; private DataType<T>(T initialValue, TypeState state) { myValue = initialValue; myState = state; } } Any help much appreciated! Cort

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  • implict type cast in generic method

    - by bitbonk
    why do I get a compiler error in the following code stating: Cannot implicty convert type SpecialNode to T even though T must derive from NodeBase as I defined in the where clause and even though SpecialNode actually derived from NodeBase? public static T GetNode<T>() where T : NodeBase { if (typeof(T) == typeof(SpecialNode)) { return ThisStaticClass.MySpecialNode; // <-- compiler error } if (typeof(T) == typeof(OtherSpecialNode)) { return ThisStaticClass.MyOtherSpecialNode; // <-- compiler error } ... return default(T); }

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  • SQL Reporting Services 2005 - Date field based on a user entered date?

    - by Pierce
    Hi, I have a report in report services 2005 that has two date fields. The problem is that if users run this for a large section of time it uses too much resources on our server. It is possible to only allow the end user to enter the start date and then the end date be auto populated/derived from this field (for example they enter the 1st of a month and this automatically change the end date to the last of a month.)

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  • Upgrade Your Existing BI Publisher 11g (11.1.1.3) to 11.1.1.5

    - by Kan Nishida
    It’s already more than a month now since BI Publisher 11.1.1.5 was released at beginning of May. Have you already tried out many of the great new features? If you are already running on the first version of BI Publisher 11g (11.1.1.3) you might wonder how to upgrade the existing BI Publisher to the 11.1.1.5 version. There are two ways to do this, one is ‘Out-Place’ and another is ‘In-Place’. The ‘Out-Place’ would be quite simple. Basically you will need to install the whole BI or just BI Publisher standalone R11.1.1.5 at a different location then you can switch the catalog to the existing one so that all the reports will be there in the new 11.1.1.5 environment. But sometimes things are not that simple, you might have some custom applications or configuration on the original environment and you want to keep all of them with the upgraded environment. For such scenarios, there is the ‘In-Place’ upgrade, which overrides on top of the original environment only the parts relevant for BI and BI Publisher, and that’s what I’m going to talk about today. Here is the basic steps of the ‘In-Place’ upgrade. Upgrade WebLogic Server to 10.3.5 Upgrade BI System to 11.1.1.5 Upgrade Database Schema Re-register BI Components Upgrade FMW (Fusion Middleware) Configuration Upgrade BI Catalog There is a section that talks about this upgrade from 11.1.1.3 to 11.1.1.5 as part of the overall upgrade document. But I hope my blog post summarized it and made it simple for you to cover only what’s necessary. Upgrade Document: http://download.oracle.com/docs/cd/E21764_01/bi.1111/e16452/bi_plan.htm#BABECJJH Before You Start Stop BI System and Backup I can’t emphasize enough, but before you start PLEASE make sure you take a backup of the existing environments first. You want to stop all WebLogic Servers, Node Manager, OPMN, and OPMN-managed system components that are part of your Oracle BI domains. If you’re on Windows you can do this by simply selecting ‘Stop BI Services’ menu. Then backup the whole system. Upgrade WebLogic Server to 10.3.5 Download WebLogic Server 10.3.5 Upgrade Installer With BI 11.1.1.3 installation your WebLogic Server (WLS) is 10.3.3 and you need to upgrade this to 10.3.5 before upgrading the BI part. In order to upgrade you will need this 10.3.5 upgrade version of WLS, which you can download from our support web site (https://support.oracle.com) You can find the detail information about the installation and the patch numbers for the WLS upgrade installer on this document. Just for your short cut, if you are running on Windows or Linux (x86) here is the patch number for your platform. Windows 32 bit: 12395517: Linux: 12395517 Upgrade WebLogic Server 1. After unzip the downloaded file, launch wls1035_upgrade_win32.exe if you’re on Windows. 2. Accept all the default values and keep ‘Next’ till end, and start the upgrade. Once the upgrade process completes you’ll see the following window. Now let’s move to the BI upgrade. Upgrade BI Platform to 11.1.1.5 with Software Only Install Download BI 11.1.1.5 You can download the 11.1.1.5 version from our OTN page for your evaluation or development. For the production use it’s recommended to download from eDelivery. 1. Launch the installer by double click ‘setup.exe’ (for Windows) 2. Select ‘Software Only Install’ option 3. Select your original Oracle Home where you installed BI 11.1.1.3. 4. Click ‘Install’ button to start the installation. And now the software part of the BI has been upgraded to 11.1.1.5. Now let’s move to the database schema upgrade. Upgrade Database Schema with Patch Assistant You need to upgrade the BIPLATFORM and MDS Schemas. You can use the Patch Assistant utility to do this, and here is an example assuming you’ve created the schema with ‘DEV’ prefix, otherwise change it with yours accordingly. Upgrade BIPLATFORM schema (if you created this schema with DEV_ prev) psa.bat -dbConnectString localhost:1521:orcl -dbaUserName sys -schemaUserName DEV_BIPLATFORM Upgrade MDS schema (if you created this schema with DEV_ prev) psa.bat -dbConnectString localhost:1521:orcl -dbaUserName sys -schemaUserName DEV_MDS Re-register BI System components Now you need to re-register your BI system components such as BI Server, BI Presentation Server, etc to the Fusion Middleware system. You can do this by running ‘upgradenonj2eeapp.bat (or .sh)’ command, which can be found at %ORACLE_HOME%/opmn/bin. Before you run, you need to start the WLS Server and make sure your WLS environment is not locked. If it’s locked then you need to release the system from the Fusion Middleware console before you run the following command. Here is the syntax for the ‘upgradenonj2eeapp.bat (or .sh) command.  upgradenonj2eeapp.bat    -oracleInstance Instance_Home_Location    -adminHost WebLogic_Server_Host_Name    -adminPort administration_server_port_number    -adminUsername administration_server_user And here is an example: cd %BI_HOME%\opmn\bin upgradenonj2eeapp.bat -oracleInstance C:\biee11\instances\instance1 -adminHost localhost -adminPort 7001 -adminUsername weblogic Upgrade Fusion Middleware Configuration There are a couple things on the Fusion Middleware need to be upgraded for the BI system to work. Here is a list of the components to upgrade. Upgrade Shared Library (JRF) Upgrade Fusion Middleware Security (OPSS) Upgrade Code Grants Upgrade OWSM Policy Repository Before moving forward, you need to stop the WebLogic Server. Here is an example. cd %MW_HOME%user_projects\domains\bifoundation_domain\binstopWebLogic.cmd And, let’s start with ‘Upgrade Shared Library (JRF)’. Upgrade Shared Library (JRF) You can use updateJRF() WLST command to upgrade the shared libraries in your domain. Before you do this, you need to stop all running instances, Managed Servers, Administration Server, and Node Manager in the domain. Here is an example of the ‘upgradeJRF()’ command: cd %MW_HOME%\oracle_common\common\bin wlst.cmd upgradeJRF('C:/biee11/user_projects/domains/bifoundation_domain') Upgrade Fusion Middleware Security (OPSS) This step is to upgrade the Fusion Middleware security piece. You can use ‘upgradeOpss()’ WLST command. Here is a syntax for the command. upgradeOpss(jpsConfig="existing_jps_config_file", jaznData="system_jazn_data_file") The ‘existing jps-config.xml file can be found under %DOMAIN_HOME%/config/fmwconfig/jps-config.xml and the ‘system_jazn_data_file’ can be found under %MW_HOME%/oracle_common/modules/oracle.jps_11.1.1/domain_config/system-jazn-data.xml. And here is an example: cd %MW_HOME%\oracle_common\common\bin wlst.cmd upgradeOpss(jpsConfig="c:/biee11/user_projects/domains/bifoundation_domain/config/fmwconfig/jps-config.xml", jaznData="c:/biee11/oracle_common/modules/oracle.jps_11.1.1/domain_config/system-jazn-data.xml") exit() Upgrade Code Grants for Oracle BI Domain And this is the last step for the Fusion Middleware platform upgrade task. You need to run this python script ‘bi-upgrade.py‘ script to configure the code grants necessary to ensure that SSL works correctly for Oracle BI. However, even if you don’t use SSL, you still need to run this script. And if you have multiple BI domains (Enterprise deployment) then you need to run this on each domain. Here is an example: cd %MW_HOME%\oracle_common\common\bin wlst c:\biee11\Oracle_BI1\bin\bi-upgrade.py --bioraclehome c:\biee11\Oracle_BI1 --domainhome c:\biee11\user_projects\domains\bifoundation_domain Upgrade OWSM Policy Repository This is to upgrade OWSM (Oracle Web Service Manager) policy repository, you can use WLST command ‘upgradeWSMPolicyRepository()’. In order to run this command you need to have your WebLogic Server up-and-running. Here is an example. cd %MW_HOME%user_projects\domains\bifoundation_domain\binstopWebLogic.cmd cd %MW_HOME%\oracle_common\common\bin wlst.cmd connect ('weblogic','welcome1','t3://localhost:7001') upgradeWSMPolicyRepository() exit() Upgrade BI Catalogs This step is required only when you have your BI Publisher integrated with BIEE. If your BI Publisher is deployed as a standalone then you don’t need to follow this step. Now finally, you can upgrade the BI catalog. This won’t upgrade your BI Publisher reports themselves, but it just upgrades some attributes information inside the catalog. Before you do this upgrade, make sure the BI system components are not running. You can check the status by the command below. opmnctl status You can do the upgrade by updating a configuration file ‘instanceconfig.xml’, which can be found at %BI_HOME%\instances\instance1\config\coreapplication_obips1, and change the value of ‘UpgradeAndExit’ to be ‘true’. Here is an example: <ps:Catalog xmlns:ps="oracle.bi.presentation.services/config/v1.1"> <ps:UpgradeAndExit>true</ps:UpgradeAndExit> </ps:Catalog> After you made the change and save the file, you need to start the BI Presentation Server. This time you want to start only the BI Presentation Server instead of starting all the servers. You can use ‘opmnctl’ to do so, and here is an example. cd %ORACLE_INSTANCE%\bin opmnctl startproc ias-component=coreapplication_obips1 This would upgrade your BI Catalog to be 11.1.1.5. After the catalog is updated, you can stop the BI Presentation Server so that you can modify the instanceconfig.xml file again to revert the upgradeAndExit value back to ‘false’. Start Explore BI Publisher 11.1.1.5 After all the above steps, you can start all the BI Services, access to the same URL, now you have your BI Publisher and/or BI 11.1.1.5 in your hands. Have fun exploring all the new features of R11.1.1.5!

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  • Announcing: Great Improvements to Windows Azure Web Sites

    - by ScottGu
    I’m excited to announce some great improvements to the Windows Azure Web Sites capability we first introduced earlier this summer.  Today’s improvements include: a new low-cost shared mode scaling option, support for custom domains with shared and reserved mode web-sites using both CNAME and A-Records (the later enabling naked domains), continuous deployment support using both CodePlex and GitHub, and FastCGI extensibility.  All of these improvements are now live in production and available to start using immediately. New “Shared” Scaling Tier Windows Azure allows you to deploy and host up to 10 web-sites in a free, shared/multi-tenant hosting environment. You can start out developing and testing web sites at no cost using this free shared mode, and it supports the ability to run web sites that serve up to 165MB/day of content (5GB/month).  All of the capabilities we introduced in June with this free tier remain the same with today’s update. Starting with today’s release, you can now elastically scale up your web-site beyond this capability using a new low-cost “shared” option (which we are introducing today) as well as using a “reserved instance” option (which we’ve supported since June).  Scaling to either of these modes is easy.  Simply click on the “scale” tab of your web-site within the Windows Azure Portal, choose the scaling option you want to use with it, and then click the “save” button.  Changes take only seconds to apply and do not require any code to be changed, nor the app to be redeployed: Below are some more details on the new “shared” option, as well as the existing “reserved” option: Shared Mode With today’s release we are introducing a new low-cost “shared” scaling mode for Windows Azure Web Sites.  A web-site running in shared mode is deployed in a shared/multi-tenant hosting environment.  Unlike the free tier, though, a web-site in shared mode has no quotas/upper-limit around the amount of bandwidth it can serve.  The first 5 GB/month of bandwidth you serve with a shared web-site is free, and then you pay the standard “pay as you go” Windows Azure outbound bandwidth rate for outbound bandwidth above 5 GB. A web-site running in shared mode also now supports the ability to map multiple custom DNS domain names, using both CNAMEs and A-records, to it.  The new A-record support we are introducing with today’s release provides the ability for you to support “naked domains” with your web-sites (e.g. http://microsoft.com in addition to http://www.microsoft.com).  We will also in the future enable SNI based SSL as a built-in feature with shared mode web-sites (this functionality isn’t supported with today’s release – but will be coming later this year to both the shared and reserved tiers). You pay for a shared mode web-site using the standard “pay as you go” model that we support with other features of Windows Azure (meaning no up-front costs, and you pay only for the hours that the feature is enabled).  A web-site running in shared mode costs only 1.3 cents/hr during the preview (so on average $9.36/month). Reserved Instance Mode In addition to running sites in shared mode, we also support scaling them to run within a reserved instance mode.  When running in reserved instance mode your sites are guaranteed to run isolated within your own Small, Medium or Large VM (meaning no other customers run within it).  You can run any number of web-sites within a VM, and there are no quotas on CPU or memory limits. You can run your sites using either a single reserved instance VM, or scale up to have multiple instances of them (e.g. 2 medium sized VMs, etc).  Scaling up or down is easy – just select the “reserved” instance VM within the “scale” tab of the Windows Azure Portal, choose the VM size you want, the number of instances of it you want to run, and then click save.  Changes take effect in seconds: Unlike shared mode, there is no per-site cost when running in reserved mode.  Instead you pay only for the reserved instance VMs you use – and you can run any number of web-sites you want within them at no extra cost (e.g. you could run a single site within a reserved instance VM or 100 web-sites within it for the same cost).  Reserved instance VMs start at 8 cents/hr for a small reserved VM.  Elastic Scale-up/down Windows Azure Web Sites allows you to scale-up or down your capacity within seconds.  This allows you to deploy a site using the shared mode option to begin with, and then dynamically scale up to the reserved mode option only when you need to – without you having to change any code or redeploy your application. If your site traffic starts to drop off, you can scale back down the number of reserved instances you are using, or scale down to the shared mode tier – all within seconds and without having to change code, redeploy, or adjust DNS mappings.  You can also use the “Dashboard” view within the Windows Azure Portal to easily monitor your site’s load in real-time (it shows not only requests/sec and bandwidth but also stats like CPU and memory usage). Because of Windows Azure’s “pay as you go” pricing model, you only pay for the compute capacity you use in a given hour.  So if your site is running most of the month in shared mode (at 1.3 cents/hr), but there is a weekend when it gets really popular and you decide to scale it up into reserved mode to have it run in your own dedicated VM (at 8 cents/hr), you only have to pay the additional pennies/hr for the hours it is running in the reserved mode.  There is no upfront cost you need to pay to enable this, and once you scale back down to shared mode you return to the 1.3 cents/hr rate.  This makes it super flexible and cost effective. Improved Custom Domain Support Web sites running in either “shared” or “reserved” mode support the ability to associate custom host names to them (e.g. www.mysitename.com).  You can associate multiple custom domains to each Windows Azure Web Site.  With today’s release we are introducing support for A-Records (a big ask by many users). With the A-Record support, you can now associate ‘naked’ domains to your Windows Azure Web Sites – meaning instead of having to use www.mysitename.com you can instead just have mysitename.com (with no sub-name prefix).  Because you can map multiple domains to a single site, you can optionally enable both a www and naked domain for a site (and then use a URL rewrite rule/redirect to avoid SEO problems). We’ve also enhanced the UI for managing custom domains within the Windows Azure Portal as part of today’s release.  Clicking the “Manage Domains” button in the tray at the bottom of the portal now brings up custom UI that makes it easy to manage/configure them: As part of this update we’ve also made it significantly smoother/easier to validate ownership of custom domains, and made it easier to switch existing sites/domains to Windows Azure Web Sites with no downtime. Continuous Deployment Support with Git and CodePlex or GitHub One of the more popular features we released earlier this summer was support for publishing web sites directly to Windows Azure using source control systems like TFS and Git.  This provides a really powerful way to manage your application deployments using source control.  It is really easy to enable this from a website’s dashboard page: The TFS option we shipped earlier this summer provides a very rich continuous deployment solution that enables you to automate builds and run unit tests every time you check in your web-site, and then if they are successful automatically publish to Azure. With today’s release we are expanding our Git support to also enable continuous deployment scenarios and integrate with projects hosted on CodePlex and GitHub.  This support is enabled with all web-sites (including those using the “free” scaling mode). Starting today, when you choose the “Set up Git publishing” link on a website’s “Dashboard” page you’ll see two additional options show up when Git based publishing is enabled for the web-site: You can click on either the “Deploy from my CodePlex project” link or “Deploy from my GitHub project” link to walkthrough a simple workflow to configure a connection between your website and a source repository you host on CodePlex or GitHub.  Once this connection is established, CodePlex or GitHub will automatically notify Windows Azure every time a checkin occurs.  This will then cause Windows Azure to pull the source and compile/deploy the new version of your app automatically.  The below two videos walkthrough how easy this is to enable this workflow and deploy both an initial app and then make a change to it: Enabling Continuous Deployment with Windows Azure Websites and CodePlex (2 minutes) Enabling Continuous Deployment with Windows Azure Websites and GitHub (2 minutes) This approach enables a really clean continuous deployment workflow, and makes it much easier to support a team development environment using Git: Note: today’s release supports establishing connections with public GitHub/CodePlex repositories.  Support for private repositories will be enabled in a few weeks. Support for multiple branches Previously, we only supported deploying from the git ‘master’ branch.  Often, though, developers want to deploy from alternate branches (e.g. a staging or future branch). This is now a supported scenario – both with standalone git based projects, as well as ones linked to CodePlex or GitHub.  This enables a variety of useful scenarios.  For example, you can now have two web-sites - a “live” and “staging” version – both linked to the same repository on CodePlex or GitHub.  You can configure one of the web-sites to always pull whatever is in the master branch, and the other to pull what is in the staging branch.  This enables a really clean way to enable final testing of your site before it goes live. This 1 minute video demonstrates how to configure which branch to use with a web-site. Summary The above features are all now live in production and available to use immediately.  If you don’t already have a Windows Azure account, you can sign-up for a free trial and start using them today.  Visit the Windows Azure Developer Center to learn more about how to build apps with it. We’ll have even more new features and enhancements coming in the weeks ahead – including support for the recent Windows Server 2012 and .NET 4.5 releases (we will enable new web and worker role images with Windows Server 2012 and .NET 4.5 next month).  Keep an eye out on my blog for details as these new features become available. Hope this helps, Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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  • From Binary to Data Structures

    - by Cédric Menzi
    Table of Contents Introduction PE file format and COFF header COFF file header BaseCoffReader Byte4ByteCoffReader UnsafeCoffReader ManagedCoffReader Conclusion History This article is also available on CodeProject Introduction Sometimes, you want to parse well-formed binary data and bring it into your objects to do some dirty stuff with it. In the Windows world most data structures are stored in special binary format. Either we call a WinApi function or we want to read from special files like images, spool files, executables or may be the previously announced Outlook Personal Folders File. Most specifications for these files can be found on the MSDN Libarary: Open Specification In my example, we are going to get the COFF (Common Object File Format) file header from a PE (Portable Executable). The exact specification can be found here: PECOFF PE file format and COFF header Before we start we need to know how this file is formatted. The following figure shows an overview of the Microsoft PE executable format. Source: Microsoft Our goal is to get the PE header. As we can see, the image starts with a MS-DOS 2.0 header with is not important for us. From the documentation we can read "...After the MS DOS stub, at the file offset specified at offset 0x3c, is a 4-byte...". With this information we know our reader has to jump to location 0x3c and read the offset to the signature. The signature is always 4 bytes that ensures that the image is a PE file. The signature is: PE\0\0. To prove this we first seek to the offset 0x3c, read if the file consist the signature. So we need to declare some constants, because we do not want magic numbers.   private const int PeSignatureOffsetLocation = 0x3c; private const int PeSignatureSize = 4; private const string PeSignatureContent = "PE";   Then a method for moving the reader to the correct location to read the offset of signature. With this method we always move the underlining Stream of the BinaryReader to the start location of the PE signature.   private void SeekToPeSignature(BinaryReader br) { // seek to the offset for the PE signagure br.BaseStream.Seek(PeSignatureOffsetLocation, SeekOrigin.Begin); // read the offset int offsetToPeSig = br.ReadInt32(); // seek to the start of the PE signature br.BaseStream.Seek(offsetToPeSig, SeekOrigin.Begin); }   Now, we can check if it is a valid PE image by reading of the next 4 byte contains the content PE.   private bool IsValidPeSignature(BinaryReader br) { // read 4 bytes to get the PE signature byte[] peSigBytes = br.ReadBytes(PeSignatureSize); // convert it to a string and trim \0 at the end of the content string peContent = Encoding.Default.GetString(peSigBytes).TrimEnd('\0'); // check if PE is in the content return peContent.Equals(PeSignatureContent); }   With this basic functionality we have a good base reader class to try the different methods of parsing the COFF file header. COFF file header The COFF header has the following structure: Offset Size Field 0 2 Machine 2 2 NumberOfSections 4 4 TimeDateStamp 8 4 PointerToSymbolTable 12 4 NumberOfSymbols 16 2 SizeOfOptionalHeader 18 2 Characteristics If we translate this table to code, we get something like this:   [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct CoffHeader { public MachineType Machine; public ushort NumberOfSections; public uint TimeDateStamp; public uint PointerToSymbolTable; public uint NumberOfSymbols; public ushort SizeOfOptionalHeader; public Characteristic Characteristics; } BaseCoffReader All readers do the same thing, so we go to the patterns library in our head and see that Strategy pattern or Template method pattern is sticked out in the bookshelf. I have decided to take the template method pattern in this case, because the Parse() should handle the IO for all implementations and the concrete parsing should done in its derived classes.   public CoffHeader Parse() { using (var br = new BinaryReader(File.Open(_fileName, FileMode.Open, FileAccess.Read, FileShare.Read))) { SeekToPeSignature(br); if (!IsValidPeSignature(br)) { throw new BadImageFormatException(); } return ParseInternal(br); } } protected abstract CoffHeader ParseInternal(BinaryReader br);   First we open the BinaryReader, seek to the PE signature then we check if it contains a valid PE signature and rest is done by the derived implementations. Byte4ByteCoffReader The first solution is using the BinaryReader. It is the general way to get the data. We only need to know which order, which data-type and its size. If we read byte for byte we could comment out the first line in the CoffHeader structure, because we have control about the order of the member assignment.   protected override CoffHeader ParseInternal(BinaryReader br) { CoffHeader coff = new CoffHeader(); coff.Machine = (MachineType)br.ReadInt16(); coff.NumberOfSections = (ushort)br.ReadInt16(); coff.TimeDateStamp = br.ReadUInt32(); coff.PointerToSymbolTable = br.ReadUInt32(); coff.NumberOfSymbols = br.ReadUInt32(); coff.SizeOfOptionalHeader = (ushort)br.ReadInt16(); coff.Characteristics = (Characteristic)br.ReadInt16(); return coff; }   If the structure is as short as the COFF header here and the specification will never changed, there is probably no reason to change the strategy. But if a data-type will be changed, a new member will be added or ordering of member will be changed the maintenance costs of this method are very high. UnsafeCoffReader Another way to bring the data into this structure is using a "magically" unsafe trick. As above, we know the layout and order of the data structure. Now, we need the StructLayout attribute, because we have to ensure that the .NET Runtime allocates the structure in the same order as it is specified in the source code. We also need to enable "Allow unsafe code (/unsafe)" in the project's build properties. Then we need to add the following constructor to the CoffHeader structure.   [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct CoffHeader { public CoffHeader(byte[] data) { unsafe { fixed (byte* packet = &data[0]) { this = *(CoffHeader*)packet; } } } }   The "magic" trick is in the statement: this = *(CoffHeader*)packet;. What happens here? We have a fixed size of data somewhere in the memory and because a struct in C# is a value-type, the assignment operator = copies the whole data of the structure and not only the reference. To fill the structure with data, we need to pass the data as bytes into the CoffHeader structure. This can be achieved by reading the exact size of the structure from the PE file.   protected override CoffHeader ParseInternal(BinaryReader br) { return new CoffHeader(br.ReadBytes(Marshal.SizeOf(typeof(CoffHeader)))); }   This solution is the fastest way to parse the data and bring it into the structure, but it is unsafe and it could introduce some security and stability risks. ManagedCoffReader In this solution we are using the same approach of the structure assignment as above. But we need to replace the unsafe part in the constructor with the following managed part:   [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)] public struct CoffHeader { public CoffHeader(byte[] data) { IntPtr coffPtr = IntPtr.Zero; try { int size = Marshal.SizeOf(typeof(CoffHeader)); coffPtr = Marshal.AllocHGlobal(size); Marshal.Copy(data, 0, coffPtr, size); this = (CoffHeader)Marshal.PtrToStructure(coffPtr, typeof(CoffHeader)); } finally { Marshal.FreeHGlobal(coffPtr); } } }     Conclusion We saw that we can parse well-formed binary data to our data structures using different approaches. The first is probably the clearest way, because we know each member and its size and ordering and we have control about the reading the data for each member. But if add member or the structure is going change by some reason, we need to change the reader. The two other solutions use the approach of the structure assignment. In the unsafe implementation we need to compile the project with the /unsafe option. We increase the performance, but we get some security risks.

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  • AIX Grid Control 10.2.0.5 Communication and Monitoring Issue since 31-DEC-2010

    - by jayatheertha.rao(at)oracle.com
    Detailed symptoms for Oracle Management Server (OMS) 10.2.0.5 on AIX Oracle Management Service 10.2.0.5 instances on AIX 5L remain active and functional, but the OMS instances fail to communicate with the Grid Control Management Agents.An SSLPeerUnverified exception will be reported in the file $ORACLE_HOME/sysman/log/emoms.trc when OMS attempts to connect with an Agent:Javax.net.ssl.SSLPeerUnverifiedException: peer not authenticatedat com.sun.net.ssl.internal.ssl.SSLSessionImpl.getPeerCertificateChain(DashoA12275)at oracle.sysman.emSDK.emd.comm.EMDClient.authenticateHTTPConnection(EMDClient.java:2002)at oracle.sysman.emSDK.emd.comm.EMDClient.getConnection(EMDClient.java:1877)at oracle.sysman.emSDK.emd.comm.EMDClient.getConnection(EMDClient.java:1810)at oracle.sysman.emSDK.emd.comm.EMDClient.verifyHttpConnection(EMDClient.java:2540)at oracle.sysman.emSDK.emd.comm.EMDClient.getResponseForRequest(EMDClient.java:2323)at oracle.sysman.emSDK.emd.comm.EMDClient.getUploadManagerStatus(EMDClient.java:4853)at oracle.sysman.eml.admin.rep.emdConfig.EmdConfigTargetsData.getEmdUploadData(EmdConfigTargetsData.java:1640)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)This error may be reported when:- Accessing the Agent home page in Grid Control- Setting preferred credentials for a target monitored by the Agent- Managing metrics for a target monitored by the Agent The jobs scheduled to be run by Agents can become non-responsiveThe OMS log file $ORACLE_HOME/sysman/log/emoms.trc can show:2010-12-31 00:06:58,204 [JobWorker 430:Thread-34] DEBUG emSDK.comm getStreamResponse.4015 - oracle.sysman.emSDK.emd.comm.CommException: java.io.IOException: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticatedoracle.sysman.emSDK.emd.comm.CommException: java.io.IOException: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticatedat oracle.sysman.emSDK.emd.comm.EMDClient.getStreamResponse_(EMDClient.java:4088)at oracle.sysman.emSDK.emd.comm.EMDClient.getStreamResponse(EMDClient.java:4009)at oracle.sysman.emSDK.emd.comm.EMDClient.remoteOperation(EMDClient.java:3404)at oracle.sysman.emdrep.jobs.CommandManager.requestRemoteCommand(CommandManager.java:765)at oracle.sysman.emdrep.jobs.commands.RemoteOp.executeCommand(RemoteOp.java:434)at oracle.sysman.emdrep.jobs.commands.RemoteOp.executeCommand(RemoteOp.java:491)at oracle.sysman.emdrep.jobs.BaseJobWorker.runStep(BaseJobWorker.java:614)at oracle.sysman.emdrep.jobs.BaseJobWorker.doOneOperation(BaseJobWorker.java:738)at oracle.sysman.emdrep.jobs.JobWorker.doOneOperation(JobWorker.java:306)at oracle.sysman.emdrep.jobs.JobWorker.run(JobWorker.java:288)at oracle.sysman.util.threadPoolManager.WorkerThread.run(Worker.java:261) Detailed symptoms for Grid Control Management Agent 10.2.0.5 on AIX Beginning 31-DEC-2010 00:00:00, 10.2.0.5 Management Agents running on the AIX 5L operating system will fail to monitor Oracle Application Server targets. As a result, the Availability Status for the Oracle Application Server targets will be in the "Metric Error" state. NOTE: The 10.2.0.5.0 Agents would experience these errors regardless of the version/platform of the OMS.The following metric error is seen in the console for the Oracle Application Server targets monitored by a Grid Control Management Agent 10.2.0.5 installed on AIX and experiencing a Root Certificate Authority issue:Message oracle.sysman.emSDK.emd.fetchlet.FetchletException: oracle.sysman.emSDK.emd.fetchlet.FetchletException: oracle.sysman.emSDK.emd.fetchlet.FetchletException: oracle.sysman.emSDK.emd.comm.CommException: java.io.IOException: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated The Grid Control Management Agent log file $ORACLE_HOME/sysman/log/emagentfetchlet.log (or $ORACLE_HOME/hostname/sysman/log/emagentfetchlet.log for a clustered Agent) includes the following errors:2010-12-31 00:01:03,626 [nmefmgr_getJNIFetchlet] ERROR ias.ResponseMetric getResponseMetric.154 - Unable tocompute application server statusoracle.sysman.emSDK.emd.fetchlet.FetchletException: oracle.sysman.emSDK.emd.comm.CommException: java.io.IOException: javax.net.ssl.SSLPeerUnverifiedException: peer not authenticatedat oracle.sysman.ias.ias.ResponseMetric.getResponseMetric(ResponseMetric.java:108)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:618)at oracle.sysman.emd.fetchlets.JavaWrapperFetchlet.getMetric(JavaWrapperFetchlet.java:217)at oracle.sysman.emd.fetchlets.FetchletWrapper.getMetric(FetchletWrapper.java:382) Beginning 31-DEC-2010, 10.2.0.5 Management Agents on the AIX 5L platform will fail to secure or re-secure with Oracle Management Service (OMS). This failure will cause installation of 10.2.0.5 Agents on the AIX 5L platform to fail.NOTE: The 10.2.0.5.0 Agents would experience these errors regardless of the version/platform of the OMS.The "emctl secure agent" command will fail with the following error, which will be written to the $ORACLE_HOME/sysman/log/secure.log file (or $ORACLE_HOME/hostname/sysman/log/secure.log for a clustered Agent) :2011-01-03 21:06:11,941 [main] ERROR agent.SecureAgentCmd main.207 - Failedto secure the Agent:javax.net.ssl.SSLPeerUnverifiedException: peer not authenticatedatcom.sun.net.ssl.internal.ssl.SSLSessionImpl.getPeerCertificateChain(DashoA6275)atoracle.sysman.emctl.secure.agent.SecureAgentCmd.checkUpload(SecureAgentCmd.java:478)atoracle.sysman.emctl.secure.agent.SecureAgentCmd.secureAgent(SecureAgentCmd.java:249)atoracle.sysman.emctl.secure.agent.SecureAgentCmd.main(SecureAgentCmd.java:200)  For solution, refer to AIX Grid Control 10.2.0.5 SSL Communication and Monitoring Issue since 31-DEC-2010 (Doc ID 1275070.1)

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  • BizTalk Cross Reference Data Management Strategy

    - by charlie.mott
    Article Source: http://geekswithblogs.net/charliemott This article describes an approach to the management of cross reference data for BizTalk.  Some articles about the BizTalk Cross Referencing features can be found here: http://home.comcast.net/~sdwoodgate/xrefseed.zip http://geekswithblogs.net/michaelstephenson/archive/2006/12/24/101995.aspx http://geekswithblogs.net/charliemott/archive/2009/04/20/value-vs.id-cross-referencing-in-biztalk.aspx Options Current options to managing this data include: Maintaining xml files in the format that can be used by the out-of-the-box BTSXRefImport.exe utility. Use of user interfaces that have been developed to manage this data: BizTalk Cross Referencing Tool XRef XML Creation Tool However, there are the following issues with the above options: The 'BizTalk Cross Referencing Tool' requires a separate database to manage.  The 'XRef XML Creation' tool has no means of persisting the data settings. The 'BizTalk Cross Referencing tool' generates integers in the common id field. I prefer to use a string (e.g. acme.country.uk). This is more readable. (see naming conventions below). Both UI tools continue to use BTSXRefImport.exe.  This utility replaces all xref data. This can be a problem in continuous integration environments that support multiple clients or BizTalk target instances.  If you upload the data for one client it would destroy the data for another client.  Yet in TFS where builds run concurrently, this would break unit tests. Alternative Approach In response to these issues, I instead use simple SQL scripts to directly populate the BizTalkMgmtDb xref tables combined with a data namepacing strategy to isolate client data. Naming Conventions All data keys use namespace prefixing.  The pattern will be <companyName>.<data Type>.  The naming conventions will be to use lower casing for all items.  The data must follow this pattern to isolate it from other company cross-reference data.  The table below shows some sample data. (Note: this data uses the 'ID' cross-reference tables.  the same principles apply for the 'value' cross-referencing tables). Table.Field Description Sample Data xref_AppType.appType Application Types acme.erp acme.portal acme.assetmanagement xref_AppInstance.appInstance Application Instances (each will have a corresponding application type). acme.dynamics.ax acme.dynamics.crm acme.sharepoint acme.maximo xref_IDXRef.idXRef Holds the cross reference data types. acme.taxcode acme.country xref_IDXRefData.CommonID Holds each cross reference type value used by the canonical schemas. acme.vatcode.exmpt acme.vatcode.std acme.country.usa acme.country.uk xref_IDXRefData.AppID This holds the value for each application instance and each xref type. GBP USD SQL Scripts The data to be stored in the BizTalkMgmtDb xref tables will be managed by SQL scripts stored in a database project in the visual studio solution. File(s) Description Build.cmd A sqlcmd script to deploy data by running the SQL scripts below.  (This can be run as part of the MSBuild process).   acme.purgexref.sql SQL script to clear acme.* data from the xref tables.  As such, this will not impact data for any other company. acme.applicationInstances.sql   SQL script to insert application type and application instance data.   acme.vatcode.sql acme.country.sql etc ...  There will be a separate SQL script to insert each cross-reference data type and application specific values for these types.

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