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• Trace File Source Adapter

  The Trace File Source adapter is a useful addition to your SSIS toolbox.  It allows you to read 2005 and 2008 profiler traces stored as .trc files and read them into the Data Flow.  From there you can perform filtering and analysis using the power of SSIS. There is no need for a SQL Server connection this just uses the trace file. Example Usages Cache warming for SQL Server Analysis Services Reading the flight recorder Find out the longest running queries on a server Analyze statements for CPU, memory by user or some other criteria you choose Properties The Trace File Source adapter has two properties, both of which combine to control the source trace file that is read at runtime. SQL Server 2005 and SQL Server 2008 trace files are supported for both the Database Engine (SQL Server) and Analysis Services. The properties are managed by the Editor form or can be set directly from the Properties Grid in Visual Studio. Property Type Description AccessMode Enumeration This property determines how the Filename property is interpreted. The values available are: DirectInput Variable Filename String This property holds the path for trace file to load (*.trc). The value is either a full path, or the name of a variable which contains the full path to the trace file, depending on the AccessMode property. Trace Column Definition Hopefully the majority of you can skip this section entirely, but if you encounter some problems processing a trace file this may explain it and allow you to fix the problem. The component is built upon the trace management API provided by Microsoft. Unfortunately API methods that expose the schema of a trace file have known issues and are unreliable, put simply the data often differs from what was specified. To overcome these limitations the component uses  some simple XML files. These files enable the trace column data types and sizing attributes to be overridden. For example SQL Server Profiler or TMO generated structures define EventClass as an integer, but the real value is a string. TraceDataColumnsSQL.xml  - SQL Server Database Engine Trace Columns TraceDataColumnsAS.xml    - SQL Server Analysis Services Trace Columns The files can be found in the %ProgramFiles%\Microsoft SQL Server\100\DTS\PipelineComponents folder, e.g. "C:\Program Files\Microsoft SQL Server\100\DTS\PipelineComponents\TraceDataColumnsSQL.xml" "C:\Program Files\Microsoft SQL Server\100\DTS\PipelineComponents\TraceDataColumnsAS.xml" If at runtime the component encounters a type conversion or sizing error it is most likely due to a discrepancy between the column definition as reported by the API and the actual value encountered. Whilst most common issues have already been fixed through these files we have implemented specific exception traps to direct you to the files to enable you to fix any further issues due to different usage or data scenarios that we have not tested. An example error that you can fix through these files is shown below. Buffer exception writing value to column 'Column Name'. The string value is 999 characters in length, the column is only 111. Columns can be overridden by the TraceDataColumns XML files in "C:\Program Files\Microsoft SQL Server\100\DTS\PipelineComponents\TraceDataColumnsAS.xml". Installation The component is provided as an MSI file which you can download and run to install it. This simply places the files on disk in the correct locations and also installs the assemblies in the Global Assembly Cache as per Microsoft’s recommendations. You may need to restart the SQL Server Integration Services service, as this caches information about what components are installed, as well as restarting any open instances of Business Intelligence Development Studio (BIDS) / Visual Studio that you may be using to build your SSIS packages. Finally you will have to add the transformation to the Visual Studio toolbox manually. Right-click the toolbox, and select Choose Items.... Select the SSIS Data Flow Items tab, and then check the Trace File Source transformation in the Choose Toolbox Items window. This process has been described in detail in the related FAQ entry for How do I install a task or transform component? We recommend you follow best practice and apply the current Microsoft SQL Server Service pack to your SQL Server servers and workstations. Please note that the Microsoft Trace classes used in the component are not supported on 64-bit platforms. To use the Trace File Source on a 64-bit host you need to ensure you have the 32-bit (x86) tools available, and the way you execute your package is setup to use them, please see the help topic 64-bit Considerations for Integration Services for more details. Downloads Trace Sources for SQL Server 2005 -- Trace Sources for SQL Server 2008 Version History SQL Server 2008 Version 2.0.0.382 - SQL Sever 2008 public release. (9 Apr 2009) SQL Server 2005 Version 1.0.0.321 - SQL Server 2005 public release. (18 Nov 2008) -- Screenshots

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• Data Source Security Part 5

  - by Steve Felts

  If you read through the first four parts of this series on data source security, you should be an expert on this focus area.  There is one more small topic to cover related to WebLogic Resource permissions.  After that comes the test, I mean example, to see with a real set of configuration parameters what the results are with some concrete values. WebLogic Resource Permissions All of the discussion so far has been about database credentials that are (eventually) used on the database side.  WLS has resource credentials to control what WLS users are allowed to access JDBC resources.  These can be defined on the Policies tab on the Security tab associated with the data source.  There are four permissions: “reserve” (get a new connection), “admin”, “shrink”, and reset (plus the all-inclusive “ALL”); we will focus on “reserve” here because we are talking about getting connections.  By default, JDBC resource permissions are completely open – anyone can do anything.  As soon as you add one policy for a permission, then all other users are restricted.  For example, if I add a policy so that “weblogic” can reserve a connection, then all other users will fail to reserve connections unless they are also explicitly added.  The validation is done for WLS user credentials only, not database user credentials.  Configuration of resources in general is described at “Create policies for resource instances” http://docs.oracle.com/cd/E24329_01/apirefs.1211/e24401/taskhelp/security/CreatePoliciesForResourceInstances.html.  This feature can be very useful to restrict what code and users can get to your database. There are the three use cases: API Use database credentials User for permission checking getConnection() True or false Current WLS user getConnection(user,password) False User/password from API getConnection(user,password) True Current WLS user If a simple getConnection() is used or database credentials are enabled, the current user that is authenticated to the WLS system is checked. If database credentials are not enabled, then the user and password on the API are used. Example The following is an actual example of the interactions between identity-based-connection-pooling-enabled, oracle-proxy-session, and use-database-credentials. On the database side, the following objects are configured.- Database users scott; jdbcqa; jdbcqa3- Permission for proxy: alter user jdbcqa3 grant connect through jdbcqa;- Permission for proxy: alter user jdbcqa grant connect through jdbcqa; The following WebLogic Data Source objects are configured.- Users weblogic, wluser- Credential mapping “weblogic” to “scott”- Credential mapping "wluser" to "jdbcqa3"- Data source descriptor configured with user “jdbcqa”- All tests are run with Set Client ID set to true (more about that below).- All tests are run with oracle-proxy-session set to false (more about that below). The test program:- Runs in servlet- Authenticates to WLS as user “weblogic” Use DB Credentials Identity based getConnection(scott,***) getConnection(weblogic,***) getConnection(jdbcqa3,***) getConnection()  true  true Identity scottClient weblogicProxy null weblogic fails - not a db user User jdbcqa3Client weblogicProxy null Default user jdbcqaClient weblogicProxy null  false  true scott fails - not a WLS user User scottClient scottProxy null jdbcqa3 fails - not a WLS user User scottClient scottProxy null  true  false Proxy for scott fails weblogic fails - not a db user User jdbcqa3Client weblogicProxy jdbcqa Default user jdbcqaClient weblogicProxy null  false  false scott fails - not a WLS user Default user jdbcqaClient scottProxy null jdbcqa3 fails - not a WLS user Default user jdbcqaClient scottProxy null If Set Client ID is set to false, all cases would have Client set to null. If this was not an Oracle thin driver, the one case with the non-null Proxy in the above table would throw an exception because proxy session is only supported, implicitly or explicitly, with the Oracle thin driver. When oracle-proxy-session is set to true, the only cases that will pass (with a proxy of "jdbcqa") are the following.1. Setting use-database-credentials to true and doing getConnection(jdbcqa3,…) or getConnection().2. Setting use-database-credentials to false and doing getConnection(wluser, …) or getConnection(). Summary There are many options to choose from for data source security.  Considerations include the number and volatility of WLS and Database users, the granularity of data access, the depth of the security identity (property on the connection or a real user), performance, coordination of various components in the software stack, and driver capabilities.  Now that you have the big picture (remember that table in part 1), you can make a more informed choice.

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• Capturing Ctrl-Alt-Del in JavaScript/jQuery

  - by AJ

  While just playing with jQuery/JavaScript I ran across this problem. I could capture Alt and Ctrl keys but NOT Del and certainly not all of them together. $(document).ready(function() { $("#target").keydown(function(event) { if (event.ctrlKey && event.altKey && event.keyCode == '46') { alter("Ctrl-Alt-Del combination"); } }); }); Is it possible to capture all these three keys together?

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• how to add ctrl - click listeners in eclipse java editor

  - by jaime

  I want to add a ctrl - clic kind of listener to a custom javadoc annotation in eclipse java editor, thus I want to be able to move the focus to a specific place when the use ctrl - clic @customJavadoc annotation.

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• Source Control - Distributed Systems vs. Non Distributed - What's the difference?

  - by Randy Minder

  I just read Spolsky's last piece about Distributed vs. Non-Distributed version control systems (http://www.joelonsoftware.com/items/2010/03/17.html). What's the difference between the two? Our company uses TFS. What camp does this fall in?

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• Check Ctrl / Shift / Alt keys on 'click' event

  - by Misha Moroshko

  How could I identify which Ctrl / Shift / Alt keys are pressed in the following code ? $("#my_id").click(function() { if (<left control key is pressed>) { alert("Left Ctrl"); } if (<right shift and left alt keys are pressed>) { alert("Right Shift + Left Alt"); } }); Thanks !

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• How to detect ctrl+v ,Ctrl+c using Javascript?

  - by Ramakrishnan

  How to detect ctrl+v ,Ctrl+c using Javascript? i need to restrict pasting in my textareas,end user should not copy and paste the content, user should only type text in text area. how to achive this. Thanks in advance.

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• WPF- Is there a way to make a TabContol ignore CTRL-Tab and still fire CTRL-TAB keybindings on the p

  - by Justin

  I have a TabControl in the mainwindow of my app. I also Have a keyBinding for CTRL-TAB. However, whenever the TabControl is selected and CTRL-TAB is pressed the keybinding is not triggered because the TabControl handles the input and cycles through the tabs. Is there any way that I can fix this?

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• Is ctrl-s save universal for save or are there different combinations for different languages

  - by aepheus

  I imagine that there are different combination, just looking for an affirmation. Or, are we developers really that english-centric? If I were in japan, using a word processor on some computer, would ctrl-s save? Are there keyboards where ctrl-s doesn't even exist (non-english keyboards)? Most of what I've seen usually has latin + [insert language here] characters, usually overridden on the normal qwerty keyboard.

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• CTRL+mouse wheel in gvim (windows) not paging

  - by andrew

  Hello, I'm loving vim, but one thing that's bugging me is that when I hold the control key and mouse wheel up or down, the window scrolls normally when the bindings are telling it to page up/down. I'm using the exact same vimrc file (and plugins) on one of my linux machines and the CTRL+mouse wheel does page up down (as opposed to just normally scrolling like in windows). Is there some way to force gvim to response to a ctrl+MouseUp/Down event? It seems to be ignoring it in windows ='[

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• Hibernate Distributed Cache

  - by DD

  Hi, I'm looking to setup Hibernate with distributed cache where I have one application writing to the DB and another one reading from the DB. Is there an easy way to notify the reading application when the writing one has written through Hibernate? The distributed cache will invalidate the cache but I need the reading application to know a change has been made to refresh its data immediately. Thanks, D

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• c#: how to send ctrl+z

  - by I__

  how do i convert ctrl+z to a string? i am sending this as an AT COMMAND to an attached device to this computer basically i just to put some chars in a string and ctrl+z in that string as well

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• wxpython Prevent Ctrl+Enter from changing the focus

  - by RSabet

  I have two wxListCtrl and want to process the Ctrl+Enter keyboard event without letting wx change the focus to the other ListCtrl. I have event handlers for wx.EVT_KEY_DOWN, wx.EVT_KEY_UP, wx.EVT_CHAR and KillFocus, but KillFocus is always called first, then the focus changes and the the keyboard handlers are called for the wrong ListCtrl. Is there a way to prevent wx from changing the focus, when Ctrl+Enter is pressed ?

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• send socket c ctrl+c behavior

  - by out_sider

  I'm witting an application based on a server and various client but I'm having a problem with the send command. Whenever I do ctrl+c on the client side the send operation kills the thread which is in and the process running (in order to have multiple clients I set a thread to which one). If the client ends (doing the close socket) properly the server doesn't die, but when I use the ctrl+c combination on the client both exit. What can I do to prevent send commando to have this behavior? Thx in advance

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• How to send ctrl+z

  - by I__

  How do I convert ctrl+z to a string? I am sending this as an AT COMMAND to an attached device to this computer. Basically, I just to put some chars in a string and ctrl+z in that string as well

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• DDD East Anglia, 29th June 2013 - Async Patterns presentation and source code

  - by Liam Westley

  Originally posted on: http://geekswithblogs.net/twickers/archive/2013/07/01/ddd-east-anglia-29th-june-2013---async-patterns-presentation.aspxMany thanks to the team in Cambridge for an awesome first conference DDD East Anglia.  I definitely appreciate how each of the different areas have their own distinctive atmosphere and feel.  Thanks to some great sponsors we enjoyed a great venue and some excellent nibbles. For those who attended my Async my source code and presentation are available on GitHub, https://github.com/westleyl/DDDEastAnglia2013-Async.git If you are new to Git then the easiest client to install is GitHub for Windows, a graphical UI for accessing GitHub. Personally, I also have Git Extensions and Tortoise Git installed. Tortoise Git is the file explorer add-in that works in a familiar manner to TortoiseSVN. As I mentioned during the presentation I have not included the sample data, the music files, in the source code placed on GitHub but I have included instructions on how to download them from http://silents.bandcamp.comand place them in the correct folders. Also, Windows Media Player, by default, does not play Ogg Vorbis and Flac music files, however you can download the codec installer for these, for free, from http://xiph.org/dshow. I have included the .Net 4.0 version of the source code that uses the Microsoft.Bcl.Async NuGet package - once you have got the project from GitHub you will need to install this NuGet package for the code to compile. Load Project into Visual Studio 2012 Access the NuGet package manager (Tools -> Library Package Manager -> Manage NuGet Packages For Solution) Highlight Online and then Search Online for microsoft.bcl.async Click on Install button Resources : You can download the Task-based Asynchronous Pattern white paper by Stephen Toub, which was the inspiration for this presentation from here - http://www.microsoft.com/en-us/download/details.aspx?id=19957 Presentation : If you just want the presentation and don’t want to bother with a GitHub login you can download the PowerPoint presentation from here.

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• apt-get install kernel source error

  - by MA1

  apt-get source linux-image-$(uname -r) gives me the below error Reading package lists... Done Building dependency tree Reading state information... Done Picking 'linux' as source package instead of 'linux-image-3.0.0-12-generic' NOTICE: 'linux' packaging is maintained in the 'Git' version control system at: http://kernel.ubuntu.com/git-repos/ubuntu/ubuntu-oneiric.git Skipping already downloaded file 'linux_3.0.0-17.30.dsc' Need to get 99.9 MB of source archives. Err http://pk.archive.ubuntu.com/ubuntu/ oneiric-updates/main linux 3.0.0-17.30 (tar) 500 ( The request was rejected by the HTTP filter. Contact your ISA Server administrator. ) Err http://pk.archive.ubuntu.com/ubuntu/ oneiric-updates/main linux 3.0.0-17.30 (diff) 500 ( The request was rejected by the HTTP filter. Contact your ISA Server administrator. ) Failed to fetch http://pk.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux_3.0.0.orig.tar.gz 500 ( The request was rejected by the HTTP filter. Contact your ISA Server administratorThe request was rejected by the HTTP filter. Contact your ISA Server administrator. ) Failed to fetch http://pk.archive.ubuntu.com/ubuntu/pool/main/l/linux/linux_3.0.0-17.30.diff.gz 500 ( The request was rejected by the HTTP filter. Contact your ISA Server administrator. ) E: Failed to fetch some archives. Can someone suggest a solution?

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• What are the licensing issues involved in the Oracle/Apache java dispute?

  - by Chris Knight

  I've just started following with interest the soap opera involving Oracle's acquisition of Java and the detriment of goodwill it seems to have generated in the open source community. Specifically, I'm now trying to get my head around the implications of Oracle's decision to refuse Apache an open source license for Harmony. My questions: 1) What is Harmony anyway? Their website states "Apache Harmony software is a modular Java runtime with class libraries and associated tools". How is this different than J2SE or J2EE? Or is Harmony akin to Andriod? 2) The crux of this issue is around the Java Technology Compatibility Kit (or TCK) which certifies that your implementation adheres to the JSR specifications. If I understand correctly, Oracle refuse to offer free or open source license access to the TCK, denying projects like Harmony from being released as open source. Why is this such a big deal for Apache? E.g. why can't (or don't) they release Harmony under a restricted license? 3) From this site is the following quote: It looks like Oracle’s plan is to restrict deployments of Java implementations in certain markets, particularly on mobile platforms, so that it can monetize its own Java offering in those markets without any competition. Presumably anything Oracle produced would be subject to the same restrictions it is imposing on others with respect to end-technology licensing, so how could they get a leg up on the competition? While no doubt distateful, wouldn't other competitors such as Google or Apache be able to release competing platforms under the same license as Oracle?

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• Why kernel source is not installed

  - by Subhajit

  I want to install kernel source in Ubuntu 12.04 which is not installed. I have checked the same using the following command : dpkg -s kernel Output is Kernel is not installed no information available Hence I have followed the following steps to install the same: 1.Installed the Dependencies by the following command: sudo apt-get install gcc libncurses5-dev git-core kernel-package fakeroot build-essential sudo apt-get update && sudo apt-get upgrade Download kernel source by the following command: wget http://www.kernel.org/pub/linux/kernel/v3.x/linux-3.5.tar.bz2 tar -xvf linux-3.5.tar.bz2 cd linux-3.5/ 3.Compiled the source code to generate the .deb packages by the following command make-kpkg clean fakeroot make-kpkg --initrd --append-to-version=-spica kernel_image kernel_headers Install the .deb packages (two .deb packages generated, one is to install the kernel headers, another one is to install the kernel image) by the following command sudo dpkg -i linux-*.deb But after reboot it seems kernel is not installed (checked by dpkg -s kernel). Please tell where I am going wrong. Also, In step 3, I guess I am installing a new kernel (named spica kernel_image) but during the boot up this new kernel is not showing as option. Please help me

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• What's the best structure for a repository?

  - by jpmelos

  I've looked into many open source software repositories, and I've found some common elements and somethings people do in different fashion from one another. For example, every repository has a README file, a INSTALL file, a COPYING file and stuff like that. Other things differ: Some projects, like git, have their source code in the root level, while others have the source code in a src/ folder and others, like the Linux kernel, have the source code spread in different folders in root level, that divide code by areas; Some have their tests in a t/ folder, while others in a tests/ folder, or named otherwise; Some have files about submitting patches and who the maintainers are, and those might be inside some Documentation/ or in the root level. Are there recommendations? A best practice? For example: personally, I don't like the code in the root level, git-fashion. It looks messy and confuses one trying to start as a contributor (especially because they have some code inside folders, and scripts in the root level as well, it's really messy). If I were to start a project of my own and wanted to start right from the start, are there recommendations? Best practices? How can I make a clean and clear structure? Thank you!

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• Purchase Vouchers From A Reputable Source

  - by Harold Green

  We have seen a recent increase in counterfeit vouchers being marketed online and we want to make sure our Candidates are aware of the risks of purchasing vouchers from unauthorized sellers. Please be advised that only Oracle University and Oracle University authorized resellers may sell vouchers for Oracle Certification exams. If you purchase a voucher from any other source, your voucher may not be valid and you run the risk of program sanctions from Oracle which could include a lifetime ban on taking Oracle Certification exams. Be sure your voucher is from an authorized source: Oracle University Oracle Authorized Reseller If you are unsure whether your voucher seller is an Authorized Reseller: Call Oracle University to confirm. Check for the official Oracle Reseller logo on the website. Ebay, Craigslist, etc are not authorized resale avenues. The only exceptions to the above sources are vouchers from programs that provide a discount on exams, or vouchers from your employer who has purchased them through their partner program or with learning credits. These vouchers may not purchased by you, but may be provided to you from: Oracle Academy Oracle Workforce Development Partner Your employer who has purchased vouchers directly from Oracle  This investment is too important to trust to chance. Be sure that you are purchasing your voucher from a reputable source so that you can free your mind to prepare for your exam. View the full Oracle Certification Exam Voucher Use Policy.

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• BizTalk 2009 - Error when Testing Map with Flat File Source Schema

  - by StuartBrierley

  I have recently been creating some flat file schemas using the BizTalk Server 2009 Flat File Schema Wizard.  I have then been mapping these flat file schemas to a "normal" xml schema format. I have not previsouly had any cause to map flat files and ran into some trouble when testing the first of these flat file maps; with an instance of the flat file as the source it threw an XSL transform error: Test Map.btm: error btm1050: XSL transform error: Unable to write output instance to the following <file:///C:\Documents and Settings\sbrierley\Local Settings\Temp\_MapData\Test Mapping\Test Map_output.xml>. Data at the root level is invalid. Line 1, position 1. Due to the complexity of the map in question I decided to created a small test map using the same source and destination schemas to see if I could pinpoint the problem.  Although the source message instance vaildated correctly against the flat file schema, when I then tested this simplified map I got the same error. After a time of fruitless head scratching and some serious google time I figured out what the problem was. Looking at the map properties I noticed that I had the test map input set to "XML" - for a flat file instance this should be set to "native".

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• Data Source Security Part 3

  - by Steve Felts

  In part one, I introduced the security features and talked about the default behavior.  In part two, I defined the two major approaches to security credentials: directly using database credentials and mapping WLS user credentials to database credentials.  Now it's time to get down to a couple of the security options (each of which can use database credentials or WLS credentials). Set Client Identifier on Connection When "Set Client Identifier" is enabled on the data source, a client property is associated with the connection.  The underlying SQL user remains unchanged for the life of the connection but the client value can change.  This information can be used for accounting, auditing, or debugging.  The client property is based on either the WebLogic user mapped to a database user using the credential map Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} or is the database user parameter directly from the getConnection() method, based on the “use database credentials” setting described earlier. To enable this feature, select “Set Client ID On Connection” in the Console.  See "Enable Set Client ID On Connection for a JDBC data source" http://docs.oracle.com/cd/E24329_01/apirefs.1211/e24401/taskhelp/jdbc/jdbc_datasources/EnableCredentialMapping.html in Oracle WebLogic Server Administration Console Help. The Set Client Identifier feature is only available for use with the Oracle thin driver and the IBM DB2 driver, based on the following interfaces. For pre-Oracle 12c, oracle.jdbc.OracleConnection.setClientIdentifier(client) is used.  See http://docs.oracle.com/cd/B28359_01/network.111/b28531/authentication.htm#i1009003 for more information about how to use this for auditing and debugging.   You can get the value using getClientIdentifier()  from the driver.  To get back the value from the database as part of a SQL query, use a statement like the following. “select sys_context('USERENV','CLIENT_IDENTIFIER') from DUAL”. Starting in Oracle 12c, java.sql.Connection.setClientInfo(“OCSID.CLIENTID", client) is used.  This is a JDBC standard API, although the property values are proprietary.  A problem with setClientIdentifier usage is that there are pieces of the Oracle technology stack that set and depend on this value.  If application code also sets this value, it can cause problems. This has been addressed with setClientInfo by making use of this method a privileged operation. A well-managed container can restrict the Java security policy grants to specific namespaces and code bases, and protect the container from out-of-control user code. When running with the Java security manager, permission must be granted in the Java security policy file for permission "oracle.jdbc.OracleSQLPermission" "clientInfo.OCSID.CLIENTID"; Using the name “OCSID.CLIENTID" allows for upward compatible use of “select sys_context('USERENV','CLIENT_IDENTIFIER') from DUAL” or use the JDBC standard API java.sql.getClientInfo(“OCSID.CLIENTID") to retrieve the value. This value in the Oracle USERENV context can be used to drive the Oracle Virtual Private Database (VPD) feature to create security policies to control database access at the row and column level. Essentially, Oracle Virtual Private Database adds a dynamic WHERE clause to a SQL statement that is issued against the table, view, or synonym to which an Oracle Virtual Private Database security policy was applied.  See Using Oracle Virtual Private Database to Control Data Access http://docs.oracle.com/cd/B28359_01/network.111/b28531/vpd.htm for more information about VPD.  Using this data source feature means that no programming is needed on the WLS side to set this context; it is set and cleared by the WLS data source code. For the IBM DB2 driver, com.ibm.db2.jcc.DB2Connection.setDB2ClientUser(client) is used for older releases (prior to version 9.5).  This specifies the current client user name for the connection. Note that the current client user name can change during a connection (unlike the user).  This value is also available in the CURRENT CLIENT_USERID special register.  You can select it using a statement like “select CURRENT CLIENT_USERID from SYSIBM.SYSTABLES”. When running the IBM DB2 driver with JDBC 4.0 (starting with version 9.5), java.sql.Connection.setClientInfo(“ClientUser”, client) is used.  You can retrieve the value using java.sql.Connection.getClientInfo(“ClientUser”) instead of the DB2 proprietary API (even if set setDB2ClientUser()).  Oracle Proxy Session Oracle proxy authentication allows one JDBC connection to act as a proxy for multiple (serial) light-weight user connections to an Oracle database with the thin driver.  You can configure a WebLogic data source to allow a client to connect to a database through an application server as a proxy user. The client authenticates with the application server and the application server authenticates with the Oracle database. This allows the client's user name to be maintained on the connection with the database. Use the following steps to configure proxy authentication on a connection to an Oracle database. 1. If you have not yet done so, create the necessary database users. 2. On the Oracle database, provide CONNECT THROUGH privileges. For example: SQL> ALTER USER connectionuser GRANT CONNECT THROUGH dbuser; where “connectionuser” is the name of the application user to be authenticated and “dbuser” is an Oracle database user. 3. Create a generic or GridLink data source and set the user to the value of dbuser. 4a. To use WLS credentials, create an entry in the credential map that maps the value of wlsuser to the value of dbuser, as described earlier.   4b. To use database credentials, enable “Use Database Credentials”, as described earlier. 5. Enable Oracle Proxy Authentication, see "Configure Oracle parameters" in Oracle WebLogic Server Administration Console Help. 6. Log on to a WebLogic Server instance using the value of wlsuser or dbuser. 6. Get a connection using getConnection(username, password).  The credentials are based on either the WebLogic user that is mapped to a database user or the database user directly, based on the “use database credentials” setting.  You can see the current user and proxy user by executing: “select user, sys_context('USERENV','PROXY_USER') from DUAL". Note: getConnection fails if “Use Database Credentials” is not enabled and the value of the user/password is not valid for a WebLogic Server user.  Conversely, it fails if “Use Database Credentials” is enabled and the value of the user/password is not valid for a database user. A proxy session is opened on the connection based on the user each time a connection request is made on the pool. The proxy session is closed when the connection is returned to the pool.  Opening or closing a proxy session has the following impact on JDBC objects. - Closes any existing statements (including result sets) from the original connection. - Clears the WebLogic Server statement cache. - Clears the client identifier, if set. -The WebLogic Server test statement for a connection is recreated for every proxy session. These behaviors may impact applications that share a connection across instances and expect some state to be associated with the connection. Oracle proxy session is also implicitly enabled when use-database-credentials is enabled and getConnection(user, password) is called,starting in WLS Release 10.3.6.  Remember that this only works when using the Oracle thin driver. To summarize, the definition of oracle-proxy-session is as follows. - If proxy authentication is enabled and identity based pooling is also enabled, it is an error. - If a user is specified on getConnection() and identity-based-connection-pooling-enabled is false, then oracle-proxy-session is treated as true implicitly (it can also be explicitly true). - If a user is specified on getConnection() and identity-based-connection-pooling-enabled is true, then oracle-proxy-session is treated as false.

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• Choosing an open source license such that maximum value is added to a startup

  - by echo-flow

  There are many companies that produce open source software products, and many business models that these companies can use. I'm particularly interested in companies like 280 North, the company behind Objective-J and Cappucino frameworks. My understanding of this organization's business model is that they: worked to develop a tool which added significant value to developers, released the tool under an open source license, built a community around the tool (which was helped by the project's open source licensing), created interesting demos illustrating the project's value All of these things added value to the project, and the company that owned it. Finally, 280 North was sold to Motorola. My question has to do with the role of software licensing in this particular business model. 280 North licensed their software projects under the LGPL, which gave them some proprietary control over how the project could be used. I believe that the LGPL is what's known as a "weak copyleft" license, meaning that the project can be linked to, without the linking code also being licensed under the LGPL; but software derived directly from the project would need to be licensed under the LGPL. For web-oriented libraries in particular, weak copyleft, or non-copyleft licensing seems to be quite common; I can't think of a single example of a popular or well-known web-oriented library that is licensed under the GPL (or AGPL). The question then, is, how much value would a weak copyleft license like the LGPL add to a software venture like 280 North, versus a non-copyleft license, such as the BSD license or the Apache Software License? I'd really appreciate any insight anyone can offer into this, but I'd be most interested in answers that can cite other companies as case studies or examples.

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• deb package building

  - by newcode

  While trying to build a package, I gave the following command in terminal: cd Downloads/src/ cd unity-5.10.0/ dpkg-buildpackage -rfakeroot -uc -b Then it gives the output: dpkg-buildpackage: export CFLAGS from dpkg-buildflags (origin: vendor): -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security dpkg-buildpackage: export CPPFLAGS from dpkg-buildflags (origin: vendor): -D_FORTIFY_SOURCE=2 dpkg-buildpackage: export CXXFLAGS from dpkg-buildflags (origin: vendor): -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security dpkg-buildpackage: export FFLAGS from dpkg-buildflags (origin: vendor): -g -O2 dpkg-buildpackage: export LDFLAGS from dpkg-buildflags (origin: vendor): -Wl,-Bsymbolic-functions -Wl,-z,relro dpkg-buildpackage: source package unity dpkg-buildpackage: source version 5.10.0-0ubuntu6 dpkg-buildpackage: source changed by Didier Roche <[email protected]> dpkg-buildpackage: host architecture i386 dpkg-source --before-build unity-5.10.0 dpkg-checkbuilddeps: Unmet build dependencies: libutouch-grail-dev (>= 1.0.20) libutouch-geis-dev (>= 2.0.10) dpkg-buildpackage: warning: Build dependencies/conflicts unsatisfied; aborting. dpkg-buildpackage: warning: (Use -d flag to override.) Then I tried to install the package using: cd.. sudo dpkg -i *deb And it gives: [sudo] password for harshnarang8: dpkg: error processing *deb (--install): cannot access archive: No such file or directory Errors were encountered while processing: *deb What is exactly causing the problem and how to encounter it?

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