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• Problem with Google Web Toolkit Maven Plugin

  - by arreche

  I got an error following the PetClinic GWT application in less then 30 minutes Any idea? C:\Users\user\Desktop\petclinic>mvn -e gwt:run + Error stacktraces are turned on. [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building petclinic [INFO] task-segment: [gwt:run] [INFO] ------------------------------------------------------------------------ [INFO] Preparing gwt:run [INFO] [aspectj:compile {execution: default}] [INFO] [resources:resources {execution: default-resources}] [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 4 resources [INFO] [compiler:compile {execution: default-compile}] [INFO] Nothing to compile - all classes are up to date Downloading: http://repository.springsource.com/maven/bundles/release/org/codeha us/plexus/plexus-components/1.1.6/plexus-components-1.1.6.pom [INFO] Unable to find resource 'org.codehaus.plexus:plexus-components:pom:1.1.6' in repository com.springsource.repository.bundles.release (http://repository.sp ringsource.com/maven/bundles/release) Downloading: http://repository.springsource.com/maven/bundles/external/org/codeh aus/plexus/plexus-components/1.1.6/plexus-components-1.1.6.pom [INFO] Unable to find resource 'org.codehaus.plexus:plexus-components:pom:1.1.6' in repository com.springsource.repository.bundles.external (http://repository.s pringsource.com/maven/bundles/external) Downloading: http://repository.springsource.com/maven/bundles/milestone/org/code haus/plexus/plexus-components/1.1.6/plexus-components-1.1.6.pom [INFO] Unable to find resource 'org.codehaus.plexus:plexus-components:pom:1.1.6' in repository com.springsource.repository.bundles.milestone (http://repository. springsource.com/maven/bundles/milestone) Downloading: http://maven.springframework.org/milestone/org/codehaus/plexus/plex us-components/1.1.6/plexus-components-1.1.6.pom [INFO] Unable to find resource 'org.codehaus.plexus:plexus-components:pom:1.1.6' in repository spring-maven-milestone (http://maven.springframework.org/mileston e) Downloading: http://google-web-toolkit.googlecode.com/svn/2.1.0.M1/gwt/maven/org /codehaus/plexus/plexus-components/1.1.6/plexus-components-1.1.6.pom [INFO] Unable to find resource 'org.codehaus.plexus:plexus-components:pom:1.1.6' in repository gwt-repo (http://google-web-toolkit.googlecode.com/svn/2.1.0.M1/g wt/maven) Downloading: http://repo1.maven.org/maven2/org/codehaus/plexus/plexus-components /1.1.6/plexus-components-1.1.6.pom [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Error building POM (may not be this project's POM). Project ID: org.codehaus.plexus:plexus-components:pom:1.1.6 Reason: Cannot find parent: org.codehaus.plexus:plexus for project: org.codehaus .plexus:plexus-components:pom:1.1.6 for project org.codehaus.plexus:plexus-compo nents:pom:1.1.6 [INFO] ------------------------------------------------------------------------ [INFO] Trace org.apache.maven.lifecycle.LifecycleExecutionException: Unable to get dependency information: Unable to read the metadata file for artifact 'org.codehaus.plexus :plexus-compiler-api:jar': Cannot find parent: org.codehaus.plexus:plexus for pr oject: org.codehaus.plexus:plexus-components:pom:1.1.6 for project org.codehaus. plexus:plexus-components:pom:1.1.6 org.codehaus.plexus:plexus-compiler-api:jar:1.5.3 from the specified remote repositories: com.springsource.repository.bundles.release (http://repository.springsource.co m/maven/bundles/release), com.springsource.repository.bundles.milestone (http://repository.springsource. com/maven/bundles/milestone), spring-maven-snapshot (http://maven.springframework.org/snapshot), com.springsource.repository.bundles.external (http://repository.springsource.c om/maven/bundles/external), spring-maven-milestone (http://maven.springframework.org/milestone), central (http://repo1.maven.org/maven2), gwt-repo (http://google-web-toolkit.googlecode.com/svn/2.1.0.M1/gwt/maven), codehaus.org (http://snapshots.repository.codehaus.org), JBoss Repo (http://repository.jboss.com/maven2) Path to dependency: 1) org.codehaus.mojo:gwt-maven-plugin:maven-plugin:1.3.1.google at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa ultLifecycleExecutor.java:711) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone Goal(DefaultLifecycleExecutor.java:569) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau ltLifecycleExecutor.java:539) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan dleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen ts(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi fecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:6 0) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: org.apache.maven.artifact.resolver.ArtifactResolutionException: Unabl e to get dependency information: Unable to read the metadata file for artifact ' org.codehaus.plexus:plexus-compiler-api:jar': Cannot find parent: org.codehaus.p lexus:plexus for project: org.codehaus.plexus:plexus-components:pom:1.1.6 for pr oject org.codehaus.plexus:plexus-components:pom:1.1.6 org.codehaus.plexus:plexus-compiler-api:jar:1.5.3 from the specified remote repositories: com.springsource.repository.bundles.release (http://repository.springsource.co m/maven/bundles/release), com.springsource.repository.bundles.milestone (http://repository.springsource. com/maven/bundles/milestone), spring-maven-snapshot (http://maven.springframework.org/snapshot), com.springsource.repository.bundles.external (http://repository.springsource.c om/maven/bundles/external), spring-maven-milestone (http://maven.springframework.org/milestone), central (http://repo1.maven.org/maven2), gwt-repo (http://google-web-toolkit.googlecode.com/svn/2.1.0.M1/gwt/maven), codehaus.org (http://snapshots.repository.codehaus.org), JBoss Repo (http://repository.jboss.com/maven2) Path to dependency: 1) org.codehaus.mojo:gwt-maven-plugin:maven-plugin:1.3.1.google at org.apache.maven.artifact.resolver.DefaultArtifactCollector.recurse(D efaultArtifactCollector.java:430) at org.apache.maven.artifact.resolver.DefaultArtifactCollector.collect(D efaultArtifactCollector.java:74) at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTra nsitively(DefaultArtifactResolver.java:316) at org.apache.maven.artifact.resolver.DefaultArtifactResolver.resolveTra nsitively(DefaultArtifactResolver.java:304) at org.apache.maven.plugin.DefaultPluginManager.ensurePluginContainerIsC omplete(DefaultPluginManager.java:835) at org.apache.maven.plugin.DefaultPluginManager.getConfiguredMojo(Defaul tPluginManager.java:647) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi nManager.java:468) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa ultLifecycleExecutor.java:694) ... 17 more Caused by: org.apache.maven.artifact.metadata.ArtifactMetadataRetrievalException : Unable to read the metadata file for artifact 'org.codehaus.plexus:plexus-comp iler-api:jar': Cannot find parent: org.codehaus.plexus:plexus for project: org.c odehaus.plexus:plexus-components:pom:1.1.6 for project org.codehaus.plexus:plexu s-components:pom:1.1.6 at org.apache.maven.project.artifact.MavenMetadataSource.retrieveRelocat edProject(MavenMetadataSource.java:200) at org.apache.maven.project.artifact.MavenMetadataSource.retrieveRelocat edArtifact(MavenMetadataSource.java:94) at org.apache.maven.artifact.resolver.DefaultArtifactCollector.recurse(D efaultArtifactCollector.java:387) ... 24 more Caused by: org.apache.maven.project.ProjectBuildingException: Cannot find parent : org.codehaus.plexus:plexus for project: org.codehaus.plexus:plexus-components: pom:1.1.6 for project org.codehaus.plexus:plexus-components:pom:1.1.6 at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(D efaultMavenProjectBuilder.java:1396) at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(D efaultMavenProjectBuilder.java:1407) at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(D efaultMavenProjectBuilder.java:1407) at org.apache.maven.project.DefaultMavenProjectBuilder.buildInternal(Def aultMavenProjectBuilder.java:823) at org.apache.maven.project.DefaultMavenProjectBuilder.buildFromReposito ry(DefaultMavenProjectBuilder.java:255) at org.apache.maven.project.artifact.MavenMetadataSource.retrieveRelocat edProject(MavenMetadataSource.java:163) ... 26 more Caused by: org.apache.maven.project.InvalidProjectModelException: Parse error re ading POM. Reason: expected START_TAG or END_TAG not TEXT (position: TEXT seen . ..<role>Developer</role>\n 6878/?\r</... @163:16) for project org.codehaus .plexus:plexus at C:\Users\user\.m2\repository\org\codehaus\plexus\plexus\1.0.8\ plexus-1.0.8.pom at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(Default MavenProjectBuilder.java:1610) at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(Default MavenProjectBuilder.java:1571) at org.apache.maven.project.DefaultMavenProjectBuilder.findModelFromRepo sitory(DefaultMavenProjectBuilder.java:562) at org.apache.maven.project.DefaultMavenProjectBuilder.assembleLineage(D efaultMavenProjectBuilder.java:1392) ... 31 more Caused by: org.codehaus.plexus.util.xml.pull.XmlPullParserException: expected ST ART_TAG or END_TAG not TEXT (position: TEXT seen ...<role>Developer</role>\n 6878/?\r</... @163:16) at hidden.org.codehaus.plexus.util.xml.pull.MXParser.nextTag(MXParser.ja va:1095) at org.apache.maven.model.io.xpp3.MavenXpp3Reader.parseDeveloper(MavenXp p3Reader.java:1389) at org.apache.maven.model.io.xpp3.MavenXpp3Reader.parseModel(MavenXpp3Re ader.java:1944) at org.apache.maven.model.io.xpp3.MavenXpp3Reader.read(MavenXpp3Reader.j ava:3912) at org.apache.maven.project.DefaultMavenProjectBuilder.readModel(Default MavenProjectBuilder.java:1606) ... 34 more [INFO] ------------------------------------------------------------------------ [INFO] Total time: 11 seconds [INFO] Finished at: Fri May 21 20:28:23 BST 2010 [INFO] Final Memory: 45M/205M [INFO] ------------------------------------------------------------------------

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• Spring MVC and 406 Error XML request

  - by Asp1de

  Hi i have a problem when running my code outside eclipse. This is my Equinox enviroment: Framework is launched. id State Bundle 0 ACTIVE org.eclipse.osgi_3.7.0.v20110221 1 ACTIVE org.eclipse.equinox.common_3.6.0.v20110506 2 ACTIVE org.eclipse.update.configurator_3.3.100.v20100512 3 RESOLVED catalina-config_1.0.0 Master=20 4 ACTIVE org.springframework.osgi.catalina.start.osgi_1.0.0 Fragments=62 5 ACTIVE com.springsource.javax.activation_1.1.1 6 ACTIVE com.springsource.javax.annotation_1.0.0 7 ACTIVE com.springsource.javax.ejb_3.0.0 8 ACTIVE com.springsource.javax.el_1.0.0 9 ACTIVE com.springsource.javax.mail_1.4.0 10 ACTIVE com.springsource.javax.persistence_1.0.0 11 ACTIVE com.springsource.javax.servlet_2.5.0 12 ACTIVE com.springsource.javax.servlet.jsp_2.1.0 13 ACTIVE com.springsource.javax.servlet.jsp.jstl_1.1.2 14 ACTIVE com.springsource.javax.xml.bind_2.0.0 15 ACTIVE com.springsource.javax.xml.rpc_1.1.0 16 ACTIVE com.springsource.javax.xml.soap_1.3.0 17 ACTIVE com.springsource.javax.xml.stream_1.0.1 18 ACTIVE com.springsource.javax.xml.ws_2.1.1 19 ACTIVE com.springsource.org.aopalliance_1.0.0 20 ACTIVE com.springsource.org.apache.catalina_6.0.18 Fragments=3, 22 21 ACTIVE com.springsource.org.apache.commons.logging_1.1.1 22 RESOLVED com.springsource.org.apache.coyote_6.0.18 Master=20 23 ACTIVE com.springsource.org.apache.el_6.0.18 24 ACTIVE com.springsource.org.apache.juli.extras_6.0.18 25 ACTIVE com.springsource.org.apache.log4j_1.2.15 Fragments=33 26 ACTIVE com.springsource.org.apache.taglibs.standard_1.1.2 27 ACTIVE org.springframework.osgi.commons-el.osgi_1.0.0.SNAPSHOT 28 ACTIVE data_1.0.0 29 ACTIVE Api_1.0.0 30 ACTIVE connector_1.0.0 31 ACTIVE core_1.0.0 32 ACTIVE org.springframework.osgi.jasper.osgi_5.5.23.SNAPSHOT 33 RESOLVED com.springsource.org.apache.log4j.config_1.0.0 Master=25 34 ACTIVE testController_1.0.0 35 ACTIVE org.eclipse.core.contenttype_3.4.100.v20100505-1235 36 ACTIVE org.eclipse.core.jobs_3.5.0.v20100515 37 ACTIVE org.eclipse.equinox.app_1.3.0.v20100512 38 ACTIVE org.eclipse.equinox.preferences_3.3.0.v20100503 39 ACTIVE org.eclipse.equinox.registry_3.5.0.v20100503 40 ACTIVE org.eclipse.osgi.services_3.2.100.v20100503 41 ACTIVE osgi.core_4.3.0.201102171602 42 ACTIVE dataImplementation_1.0.0 43 ACTIVE org.springframework.osgi.servlet-api.osgi_2.4.0.SNAPSHOT 44 ACTIVE org.springframework.aop_3.1.1.RELEASE 45 ACTIVE org.springframework.asm_3.1.1.RELEASE 46 ACTIVE org.springframework.beans_3.1.1.RELEASE 47 ACTIVE org.springframework.context_3.1.1.RELEASE 48 ACTIVE org.springframework.context.support_3.1.1.RELEASE 49 ACTIVE org.springframework.core_3.1.1.RELEASE 50 ACTIVE org.springframework.expression_3.1.1.RELEASE 51 ACTIVE org.springframework.osgi.extensions.annotations_1.2.1 52 ACTIVE org.springframework.osgi.core_1.2.1 53 ACTIVE org.springframework.osgi.extender_1.2.1 54 ACTIVE org.springframework.osgi.io_1.2.1 55 ACTIVE org.springframework.osgi.mock_1.2.1 56 ACTIVE org.springframework.osgi.web_1.2.1 57 ACTIVE org.springframework.osgi.web.extender_1.2.1 58 ACTIVE org.springframework.oxm_3.1.1.RELEASE 59 ACTIVE org.springframework.transaction_3.1.1.RELEASE 60 ACTIVE org.springframework.web_3.1.1.RELEASE 61 ACTIVE org.springframework.web.servlet_3.1.1.RELEASE 62 RESOLVED tomcat-configuration-fragment_1.0.0 Master=4 My controller is: @RequestMapping(value = "/test1", method = RequestMethod.GET, produces = "application/json") public @ResponseBody Person test1() { logger.info(" <--- Test 1 ---> \n"); Person p = new Person("a", "b", "c"); return p; } @RequestMapping(value = "/test2", method = RequestMethod.GET, produces = "application/xml") public @ResponseBody Person test3() { logger.info(" <--- Test 1 ---> \n"); Person p = new Person("a", "b", "c"); return p; } @RequestMapping(value = "/test2", method = RequestMethod.GET, headers = "Accept=*/*") public @ResponseBody Person test4() { logger.info(" <--- Test 1 ---> \n"); Person p = new Person("a", "b", "c"); return p; } @RequestMapping(value = "/parent", method = RequestMethod.GET, headers = "Accept=application/xml") public @ResponseBody Parent test2() { logger.info(" <--- Test 1 ---> \n"); Parent p = new Parent("a", "b"); return p; } If i run the TEST 1(json request) it works perfectly but when i run the test 2, 3 and 4 the browser give me back that error: (406) The resource identified by this request is only capable of generating responses with characteristics not acceptable according to the request "accept" headers (). Could someone help me? PS: if i run the bundle inside ECLIPSE it works perfectly. I generate the bundles with maven.

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• XNA Health Bar continually decreasing

  - by Craig

  As per the Health bar tutorial on ... http://www.xnadevelopment.com/tutorials/notsohealthy/NotSoHealthy.shtml I have set up the above, how do I make it decrease by 1 health per second? I want to create a mini survival game, and this is an important factor. Where am i going wrong? I want it to visibly decrease every second. using System; using System.Collections.Generic; using System.Linq; using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Audio; using Microsoft.Xna.Framework.Content; using Microsoft.Xna.Framework.GamerServices; using Microsoft.Xna.Framework.Graphics; using Microsoft.Xna.Framework.Input; using Microsoft.Xna.Framework.Media; namespace Health { /// <summary> /// This is the main type for your game /// </summary> public class Game1 : Microsoft.Xna.Framework.Game { GraphicsDeviceManager graphics; SpriteBatch spriteBatch; Texture2D healthBar; int currentHealth = 100; float seconds; public Game1() { graphics = new GraphicsDeviceManager(this); Content.RootDirectory = "Content"; } /// <summary> /// Allows the game to perform any initialization it needs to before starting to run. /// This is where it can query for any required services and load any non-graphic /// related content. Calling base.Initialize will enumerate through any components /// and initialize them as well. /// </summary> protected override void Initialize() { // TODO: Add your initialization logic here base.Initialize(); } /// <summary> /// LoadContent will be called once per game and is the place to load /// all of your content. /// </summary> protected override void LoadContent() { // Create a new SpriteBatch, which can be used to draw textures. spriteBatch = new SpriteBatch(GraphicsDevice); healthBar = Content.Load<Texture2D>("HealthBar"); // TODO: use this.Content to load your game content here } /// <summary> /// UnloadContent will be called once per game and is the place to unload /// all content. /// </summary> protected override void UnloadContent() { // TODO: Unload any non ContentManager content here } /// <summary> /// Allows the game to run logic such as updating the world, /// checking for collisions, gathering input, and playing audio. /// </summary> /// <param name="gameTime">Provides a snapshot of timing values.</param> protected override void Update(GameTime gameTime) { // Allows the game to exit if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed) this.Exit(); // TODO: Add your update logic here currentHealth = (int)MathHelper.Clamp(currentHealth, 0, 100); seconds += (float)gameTime.ElapsedGameTime.TotalSeconds; if (seconds >= 1) { currentHealth -= 1; } seconds = 0; base.Update(gameTime); } /// <summary> /// This is called when the game should draw itself. /// </summary> /// <param name="gameTime">Provides a snapshot of timing values.</param> protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); spriteBatch.Begin(); spriteBatch.Draw(healthBar, new Rectangle(this.Window.ClientBounds.Width / 2 - healthBar.Width / 2, 30, healthBar.Width, 44), new Rectangle(0, 45, healthBar.Width, 44), Color.Gray); spriteBatch.Draw(healthBar, new Rectangle(this.Window.ClientBounds.Width / 2 - healthBar.Width / 2, 30, (int)(healthBar.Width * ((double)currentHealth / 100)), 44), new Rectangle(0, 45, healthBar.Width, 44), Color.Red); spriteBatch.Draw(healthBar, new Rectangle(this.Window.ClientBounds.Width / 2 - healthBar.Width / 2, 30, healthBar.Width, 44), new Rectangle(0, 0, healthBar.Width, 44), Color.White); spriteBatch.End(); base.Draw(gameTime); } } } Cheers!

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• Using the SOA-BPM VIrtualBox Appliance

  - by antony.reynolds

  Quickstart Guide to Using Oracle Appliance for SOA/BPM Recently I have been setting up some machines for fellow engineers.  My base setup consists of Oracle Enterprise Linux with Oracle Virtual Box.  Note that after installing VirtualBox I needed to add the VirtualBox Extension Pack to enable RDP access amongst other features.  In order to get them started quickly with some images I downloaded the pre-built appliance for SOA/BPM from OTN. Out of the box this provides a VirtualBox image that is pre-installed with everything you will need to develop SOA/BPM applications. Specifically by using the virtual appliance I got the following pre-installed and configured. Oracle Enterprise Linux 5 User oracle password oracle User root password oracle. Oracle Database XE Pre-configured with SOA/BPM repository. Set to auto-start on OS startup. Oracle SOA Suite 11g PS2 Configured with a “collapsed domain”, all services (SOA/BAM/EM) running in AdminServer. Listening on port 7001 Oracle BPM Suite 11g Configured in same domain as SOA Suite. Oracle JDeveloper 11g With SOA/BPM extensions. Networking The VM by default uses NAT (Network Address Translation) for network access.  Make sure that the advanced settings for port forwarding allow access through the host to guest ports.  It should be pre-configured to forward requests on the following ports Purpose Host Port Guest Port (VBox Image) SSH 2222 22 HTTP 7001 7001 Database 1521 1521 Note that only one VirtualBox image can use a given host port, so make sure you are not clashing if it seems not to work. What’s Left to Do? There is still some customization of the environment that may be required. If you need to configure a proxy server as I did then for the oracle and root users to set up an HTTP proxy Added “export http_proxy=http://proxy-host:proxy-port” to ~oracle/.bash_profile and ~root/.bash_profile Added “export http_proxy=http://proxy-host:proxy-port” to /etc/.bashrc Edited System->Preferences to set Network Proxy In Firefox set Preferences->Network->Connection Settings to “Use system proxy settings” In JDeveloper set Edit->Preferences->Web Browser and Proxy to required proxy settings You may need to configure yum to point to a public OEL yum repository – such as http://public-yum.oracle.com. If you are going to be accessing the SOA server from outside the VirtualBox image then you may want to set the soa-infra Server URLs to be the hostname of the host OS. Snap! Once I had the machine configured how I wanted to use it I took a snapshot so that I can always get back to the pristine install I have now.  Snapshots are one of the big benefits of putting a development environment into a virtualized environment.  I can make changes to my installation and if I mess it up I can restore the image to a last known good snapshot. Hey Presto!, Ready to Go This is the quickest way to get up and running with SOA/BPM Suite.  Out of the box the download will work, I only did extra customization so I could use services outside the firewall and browse outside the firewall from within by SOA VirtualBox image.  I also use yum to update the OS to the latest binaries. So have fun.

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• JMSContext, @JMSDestinationDefintion, DefaultJMSConnectionFactory with simplified JMS API: TOTD #213

  - by arungupta

  "What's New in JMS 2.0" Part 1 and Part 2 provide comprehensive introduction to new messaging features introduced in JMS 2.0. The biggest improvement in JMS 2.0 is introduction of the "new simplified API". This was explained in the Java EE 7 Launch Technical Keynote. You can watch a complete replay here. Sending and Receiving a JMS message using JMS 1.1 requires lot of boilerplate code, primarily because the API was designed 10+ years ago. Here is a code that shows how to send a message using JMS 1.1 API: @Statelesspublic class ClassicMessageSender { @Resource(lookup = "java:comp/DefaultJMSConnectionFactory") ConnectionFactory connectionFactory; @Resource(mappedName = "java:global/jms/myQueue") Queue demoQueue; public void sendMessage(String payload) { Connection connection = null; try { connection = connectionFactory.createConnection(); connection.start(); Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE); MessageProducer messageProducer = session.createProducer(demoQueue); TextMessage textMessage = session.createTextMessage(payload); messageProducer.send(textMessage); } catch (JMSException ex) { ex.printStackTrace(); } finally { if (connection != null) { try { connection.close(); } catch (JMSException ex) { ex.printStackTrace(); } } } }} There are several issues with this code: A JMS ConnectionFactory needs to be created in a application server-specific way before this application can run. Application-specific destination needs to be created in an application server-specific way before this application can run. Several intermediate objects need to be created to honor the JMS 1.1 API, e.g. ConnectionFactory -> Connection -> Session -> MessageProducer -> TextMessage. Everything is a checked exception and so try/catch block must be specified. Connection need to be explicitly started and closed, and that bloats even the finally block. The new JMS 2.0 simplified API code looks like: @Statelesspublic class SimplifiedMessageSender { @Inject JMSContext context; @Resource(mappedName="java:global/jms/myQueue") Queue myQueue; public void sendMessage(String message) { context.createProducer().send(myQueue, message); }} The code is significantly improved from the previous version in the following ways: The JMSContext interface combines in a single object the functionality of both the Connection and the Session in the earlier JMS APIs.  You can obtain a JMSContext object by simply injecting it with the @Inject annotation.  No need to explicitly specify a ConnectionFactory. A default ConnectionFactory under the JNDI name of java:comp/DefaultJMSConnectionFactory is used if no explicit ConnectionFactory is specified. The destination can be easily created using newly introduced @JMSDestinationDefinition as: @JMSDestinationDefinition(name = "java:global/jms/myQueue",        interfaceName = "javax.jms.Queue") It can be specified on any Java EE component and the destination is created during deployment. JMSContext, Session, Connection, JMSProducer and JMSConsumer objects are now AutoCloseable. This means that these resources are automatically closed when they go out of scope. This also obviates the need to explicitly start the connection JMSException is now a runtime exception. Method chaining on JMSProducers allows to use builder patterns. No need to create separate Message object, you can specify the message body as an argument to the send() method instead. Want to try this code ? Download source code! Download Java EE 7 SDK and install. Start GlassFish: bin/asadmin start-domain Build the WAR (in the unzipped source code directory): mvn package Deploy the WAR: bin/asadmin deploy <source-code>/jms/target/jms-1.0-SNAPSHOT.war And access the application at http://localhost:8080/jms-1.0-SNAPSHOT/index.jsp to send and receive a message using classic and simplified API. A replay of JMS 2.0 session from Java EE 7 Launch Webinar provides complete details on what's new in this specification: Enjoy!

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• Upgrades in 5 Easy Pieces

  - by Anne R.

  Even though there are a few select tasks that I have to do once or twice a year, I can’t remember how to do them! Or where to find the bits and pieces to complete the task. So I love it when someone consolidates everything under one spot. That’s what the CRM On Demand team has done with the upgrade information. Specifically, they have: Provided a “one-stop” area for managing upgrades at your company. Broken down the upgrade process into 5 (yes, 5) steps. Explained when and how to perform each step with dates specific to your pod. Included details about each step, visible by expanding the step. Translated the steps into 11 languages. Added a list of release-specific resources with links from the page. Now, just head for the Training and Support portal, click the Release Info tab, and walk through the “5 Essential Steps to a Successful Upgrade.” Before you continue, though, select your language from the drop-down list on the Release Info page. CRM On Demand now has the upgrade steps translated into 11 languages. On the Step page, you can expand each section in sequence and follow the more detailed instructions that appear. This will ensure that you’ve covered all your bases for each upgrade. Here’s a shortened version of the information that you’ll find: 1. Verify your Primary Contact Information. Have you checked your primary contact information to make sure you’re being notified of all upgrade information? Or do you want more users to receive upgrade announcements? This section provides you with the navigation path to do that in CRM On Demand. 2. Review your Key Upgrade Dates. If you expand this step, a nice table appears with your critical dates for the various milestones. IMPORTANT: When your CRM On Demand pod has been officially added to the upgrade schedule, closer to the release date itself, this table will display your specific timetable. 3. Migrate your Customizations from the Staging Environment before the Snapshot Date. Oracle refreshes the Staging data with a copy of your Production data made on the Production Snapshot Date. So this section lists considerations relevant to this step. It also reminds you of the 2-week period when you should not be making any changes in your Staging environment.   4. Conduct your Upgrade Validation on the Staging Environment. When the Customer Validation Testing period begins, you need to log in to your Staging Environment to validate that your key business processes and customizations continue to behave as expected. If your company utilizes Web Services, Web Links, Web Applets or Workflow, focus on testing these first. You generally have about two weeks for testing. If you run into problems during this time, follow the instructions shown in this section for logging a service request. It describes exactly how to fill out the fields in the SR for the fastest resolution. 5. Conduct "White Glove" Testing in your Upgraded Production Environment. Before users start using the upgrade, you should access a few tabs and reports. Doing this actually warms up the cache so that frequently used pages and reports will come up at normal speed on Monday morning, when users log in to the upgraded system. Resources listed under this step help you in further preparing for the upgrade. Now there’s also a new Documentation section on the right with links to these release-specific resources.   Very nice, I commented, when discussing these improvements with the “responsible party.” She confirmed that, yes, they tried to consolidate the upgrade information, translate it for better communication, simplify it into 5 easy pieces, and drive admins responsible for handling upgrades to this one site instead of sending out elaborate emails. Yes, I just love it when someone practically reaches out and holds my hand through a process. Next best thing to a wizard!

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• Profiling Startup Of VS2012 &ndash; JustTrace Profiler

  - by Alois Kraus

  JustTrace is made by Telerik which is mainly known for its collection of UI controls. The current version (2012.3.1127.0) does include a performance and memory profiler which does cost 614€ and is currently with a special offer for 306€ on sale. It does include one year of free upgrades. The uneven € numbers are calculated from the 799€ and 50% dicsount price. The UI is already in Metro style and simple to use. Multi process, attach, method recording filter are not supported. It looks like JustTrace is like Ants a Just My Code profiler. For stuff where you do not have the pdbs or you want to dig deeper into the BCL code you will not get far. After getting the profile data you get in the All Methods grid a plain list with hit count and own time. The method list for all methods is also suspiciously short which is a clear sign that you will not get far during the analysis of foreign code. But at least there is also a memory profiler included. For this I have to choose in the first window for Profiling Type “Memory Profiler” to check the memory consumption of VS.  There are some interesting number to see but I do really miss from YourKit the thread stack window. How am I supposed to get a clue when much memory is allocated and the CPU consumption is high in which places I should look? The Snapshot summary gives a rough overview which is ok for a first impression. Next is Assemblies? This gives you a list of all loaded assemblies. Not terribly useful.   The By Type view gives you exactly what it is supposed to do. You have to keep in mind that this list is filtered by the types you did check in the Assemblies list. The By Type instance list does only show types from assemblies which do not originate from Microsoft. By default mscorlib and System are not checked. That is the reason why for the first time my By Type window looked like The idea behind this feature is to show only your instances because you are ultimately responsible for the overall memory consumption. I am not sure if I do like this feature because by default it does hide too much. I do want to see at least how many strings and arrays are allocated. A simple namespace filter would also do it in my opinion. Now you can examine all string instances and look who in the object graph does keep a reference on them. That is nice but YourKit has the big plus that you can also look into the string contents.  I am also not sure how in the graph cycles are visualized and what will happen if you have thousands of objects referencing you. That's pretty much it about JustTrace. It can help the average developer to pinpoint performance and memory issues by just looking at his own code and instances. Showing them more will not help them because the sheer amount of information will overwhelm them. And you need to have a pretty good understanding how the GC and the CLR does work. When you have a performance issue at a customer machine it is sometimes very helpful to be able a bring a profiler onto the machine (no pdbs, …) and to get a full snapshot of all processes which are in the problematic use case involved. For these more advanced use cased JustTrace is certainly the wrong tool. Next: SpeedTrace

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• Maven deploy:deploy-file not found due to version/timestamp appended to jar

  - by JamesC

  I'm having a problem using deploy:deploy-file with snapshots I'd like some advice on please. I have 2 projects; 1) Ant based and 2) the other Maven based that consumes the jars of the other project via Archiva. I've added a target to the Ant project to deploy snapshots on every successful build during our iteration. The problem is the Maven project cannot find them because the name of the dependency has a timestamp appended like so: someJar-1.0-20100407.171211-1.jar Here is the Ant target: <exec executable="${maven.bin}" dir="../lib"> <arg value="deploy:deploy-file" /> <arg value="-DgroupId=com.my.package" /><arg value="-DartifactId=${ant.project.name}" /> <arg value="-Dversion=${manifest.implementation.version}-SNAPSHOT" /> <arg value="-Dpackaging=jar" /> <arg value="-Dfile=../lib/${ant.project.name}-${manifest.implementation.version}-SNAPSHOT.jar" /> <arg value="-Durl=http://archiva.xxx.com/archiva/repository/snapshots" /> <arg value="-DrepositoryId=snapshots" /> </exec> I have a similar Ant target for releases and this works fine. Other pure Maven projects which deploy snapshosts via mvn deploy work fine. Does anyone know where I am going wrong? Thank You Update Figured out the answer, see below.

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• FileNotFoundException, altough the XML file should be deployed

  - by Bernhard V

  Hi, I've got problems starting my WAR application on a local JBoss. After two other EARs are deployed and the TomcatDeployer begins deploying the WAR, I'm getting the following error message: 2010-04-28 10:01:56,605 ERROR [org.jboss.ejb.plugins.LogInterceptor] [] [main] EJBException in method: public abstract at.sozvers.stp.zpv.ejb.lea.rwsuc.EJBLeaRegelwerkSuchenRemote at.sozvers.stp.zpv.ejb.lea.rwsuc.EJBLeaRegelwerkSuchenHome.create() throws javax.ejb.CreateException,java.rmi.RemoteException, causedBy: javax.ejb.EJBException: org.springframework.beans.factory.access.BootstrapException: Unable to initialize group definition. Group resource name [classpath*:applicationContext.xml], factory key [contextService]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contextService' defined in URL [jar:file:/C:/ta30/nutzb/jboss-4.2.3.GA.ZPV/server/default/deploy/deploy.last/zpv-app-web-frontend-1.0-SNAPSHOT.war/WEB-INF/lib/zpv-comp-ejb-modules-1.0-SNAPSHOT-client.jar!/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.context.support.ClassPathXmlApplicationContext]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [at/sozvers/stp/zpv/dao/ContextBasic.xml]; nested exception is java.io.FileNotFoundException: class path resource [at/sozvers/stp/zpv/dao/ContextBasic.xml] cannot be opened because it does not exist The sad thing is that the resource at/sozvers/stp/zpv/dao/ContextBasic.xml actually is placed in a JAR in one of my EAR files which should be deployed before the WAR. And at least I get a message that the deployment of the EAR has been successful. I also looked into the JAR with my file archiver and the ContextBasic.xml is indeed there at the right place. Is there a way for me to get sure that the JAR, not the EAR as a whole, is really deployed to the JBoss? I'm already starting to lose my head about this issue. Thank you. Bernhard

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• Maven jetty download dependencies

  - by portoalet

  Hi, Why does every time I do "mvn jetty:run", maven tries to download some dependencies (apache poi and ojdbc jars) ? How can I disable this? [INFO] Scanning for projects.. [INFO] Searching repository for plugin with prefix: 'jetty'. [INFO] ------------------------------------------------------------------------ [INFO] Building infolitReport [INFO] task-segment: [jetty:run] [INFO] ------------------------------------------------------------------------ [INFO] Preparing jetty:run Downloading: http://repository.springsource.com/maven/bundles/release/org/apache/poi/com.springsource.org.apache.poi/3.6/com.springsource.org.apache.poi-3.6.pom Downloading: http://repository.springsource.com/maven/bundles/external/org/apache/poi/com.springsource.org.apache.poi/3.6/com.springsource.org.apache.poi-3.6.pom Downloading: http://repository.springsource.com/maven/bundles/milestone/org/apache/poi/com.springsource.org.apache.poi/3.6/com.springsource.org.apache.poi-3.6.pom Downloading: http://repository.springsource.com/maven/bundles/snapshot/org/apache/poi/com.springsource.org.apache.poi/3.6/com.springsource.org.apache.poi-3.6.pom Downloading: http://repo1.maven.org/maven2/org/apache/poi/com.springsource.org.apache.poi/3.6/com.springsource.org.apache.poi-3.6.pom Downloading: http://repository.springsource.com/maven/bundles/release/com/oracle/ojdbc14/10.2.0.2/ojdbc14-10.2.0.2.pom Downloading: http://repository.springsource.com/maven/bundles/external/com/oracle/ojdbc14/10.2.0.2/ojdbc14-10.2.0.2.pom Downloading: http://repository.springsource.com/maven/bundles/milestone/com/oracle/ojdbc14/10.2.0.2/ojdbc14-10.2.0.2.pom Downloading: http://repository.springsource.com/maven/bundles/snapshot/com/oracle/ojdbc14/10.2.0.2/ojdbc14-10.2.0.2.pom Downloading: http://repo1.maven.org/maven2/com/oracle/ojdbc14/10.2.0.2/ojdbc14-10.2.0.2.pom [INFO] [aspectj:compile {execution: default}]

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• How to upgrade all dependencies to a specific version

  - by Calm Storm

  Hi, I tried doing a mvn dependency:tree and I get a tree of dependencies. My question is, My project depends on many modules which internally depends on many spring artifacts. There are a few version clashes. I want to upgrade all spring related libraries to say the latest one (2.6.x or above). What is the preferred way to do this? Should I declare all the deps spring-context, spring-support (and 10 other artifacts) in my pom.xml and point them to 2.6.x ? Is there any other better method ? [INFO] +- com.xxxx:yyy-jar:jar:1.0-SNAPSHOT:compile [INFO] | +- com.xxxx:zzz-commons:jar:1.0-SNAPSHOT:compile [INFO] | | +- org.springframework:spring-dao:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-jdbc:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-web:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-support:jar:2.0.7:compile [INFO] | | +- net.sf.ehcache:ehcache:jar:1.2:compile [INFO] | | +- commons-collections:commons-collections:jar:3.2:compile [INFO] | | +- aspectj:aspectjweaver:jar:1.5.3:compile [INFO] | | +- betex-commons:betex-commons:jar:5.5.1-2:compile [INFO] | | \- javax.servlet:servlet-api:jar:2.4:compile [INFO] | +- org.springframework:spring-beans:jar:2.0.7:compile [INFO] | +- org.springframework:spring-jmx:jar:2.0.7:compile [INFO] | +- org.springframework:spring-remoting:jar:2.0.7:compile [INFO] | +- org.apache.cxf:cxf-rt-core:jar:2.0.2-incubator:compile [INFO] | | +- org.apache.cxf:cxf-api:jar:2.0.2-incubator:compile [INFO] | | | +- org.apache.geronimo.specs:geronimo-activation_1.1_spec:jar:1.0-M1:compile [INFO] | | | +- org.codehaus.woodstox:wstx-asl:jar:3.2.1:compile [INFO] | | | +- org.apache.neethi:neethi:jar:2.0.2:compile [INFO] | | | \- org.apache.cxf:cxf-common-schemas:jar:2.0.2-incubator:compile UPDATE : I have removed the extra question about "\-" so my question is now what the subject asks for :)

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• Maven GAE Plugin - Unable to run gae:debug

  - by Taylor L

  I'm having trouble running the gae:debug goal of the Maven GAE Plugin. The error I'm receiving is below. Any ideas? I'm running it with "mvn gae:debug". [INFO] Packaging webapp [INFO] Assembling webapp[test-gae] in [C:\development\test-gae\target\test-gae-0.0.1-SNAPSHOT] [INFO] Processing war project [INFO] Webapp assembled in[56 msecs] [INFO] Building war: C:\development\test-gae\target\test-gae-0.0.1-SNAPSHOT.war [INFO] [statemgmt:end-fork] [INFO] Ending forked execution [fork id: -2101914270] [INFO] [gae:debug] Usage: <dev-appserver> [options] <war directory> Options: --help, -h Show this help message and exit. --server=SERVER The server to use to determine the latest -s SERVER SDK version. --address=ADDRESS The address of the interface on the local machine -a ADDRESS to bind to (or 0.0.0.0 for all interfaces). --port=PORT The port number to bind to on the local machine. -p PORT --sdk_root=root Overrides where the SDK is located. --disable_update_check Disable the check for newer SDK versions. EDIT: gae:run with the jvmFlags option is also giving me the same result with the below configuration. <plugin> <groupId>net.kindleit</groupId> <artifactId>maven-gae-plugin</artifactId> <version>0.5.0</version> <configuration> <jvmFlags> <jvmFlag>-Xdebug</jvmFlag> <jvmFlag>-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8000</jvmFlag> </jvmFlags> </configuration> </plugin>

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• What does the \- mean in the mvn dependency tree output

  - by Calm Storm

  Hi, I tried doing a mvn dependency:tree and I get a tree of dependencies. The output looks like below. I want to know what is the "-" symbol that is shown at times and the "+-" symbol for other dependencies (it doesnt seem to be the scope) My actual question is, My project depends on many modules which internally depends on many spring artifacts. There are a few version clashes. I want to upgrade all spring related libraries to say the latest one (2.6.x or above). What is the preferred way to do this? Should I declare all the deps spring-context, spring-support (and 10 other artifacts) in my pom.xml and point them to 2.6.x ? Is there any other better method ? [INFO] +- com.xxxx:yyy-jar:jar:1.0-SNAPSHOT:compile [INFO] | +- com.xxxx:zzz-commons:jar:1.0-SNAPSHOT:compile [INFO] | | +- org.springframework:spring-dao:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-jdbc:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-web:jar:2.0.7:compile [INFO] | | +- org.springframework:spring-support:jar:2.0.7:compile [INFO] | | +- net.sf.ehcache:ehcache:jar:1.2:compile [INFO] | | +- commons-collections:commons-collections:jar:3.2:compile [INFO] | | +- aspectj:aspectjweaver:jar:1.5.3:compile [INFO] | | +- betex-commons:betex-commons:jar:5.5.1-2:compile [INFO] | | \- javax.servlet:servlet-api:jar:2.4:compile [INFO] | +- org.springframework:spring-beans:jar:2.0.7:compile [INFO] | +- org.springframework:spring-jmx:jar:2.0.7:compile [INFO] | +- org.springframework:spring-remoting:jar:2.0.7:compile [INFO] | +- org.apache.cxf:cxf-rt-core:jar:2.0.2-incubator:compile [INFO] | | +- org.apache.cxf:cxf-api:jar:2.0.2-incubator:compile [INFO] | | | +- org.apache.geronimo.specs:geronimo-activation_1.1_spec:jar:1.0-M1:compile [INFO] | | | +- org.codehaus.woodstox:wstx-asl:jar:3.2.1:compile [INFO] | | | +- org.apache.neethi:neethi:jar:2.0.2:compile [INFO] | | | \- org.apache.cxf:cxf-common-schemas:jar:2.0.2-incubator:compile

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• FileNotFoundException, although the XML file should be deployed

  - by Bernhard V

  Hi, I've got problems starting my WAR application on a local JBoss. After two other EARs are deployed and the TomcatDeployer begins deploying the WAR, I'm getting the following error message: 2010-04-28 10:01:56,605 ERROR [org.jboss.ejb.plugins.LogInterceptor] [] [main] EJBException in method: public abstract at.sozvers.stp.zpv.ejb.lea.rwsuc.EJBLeaRegelwerkSuchenRemote at.sozvers.stp.zpv.ejb.lea.rwsuc.EJBLeaRegelwerkSuchenHome.create() throws javax.ejb.CreateException,java.rmi.RemoteException, causedBy: javax.ejb.EJBException: org.springframework.beans.factory.access.BootstrapException: Unable to initialize group definition. Group resource name [classpath*:applicationContext.xml], factory key [contextService]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'contextService' defined in URL [jar:file:/C:/ta30/nutzb/jboss-4.2.3.GA.ZPV/server/default/deploy/deploy.last/zpv-app-web-frontend-1.0-SNAPSHOT.war/WEB-INF/lib/zpv-comp-ejb-modules-1.0-SNAPSHOT-client.jar!/applicationContext.xml]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [org.springframework.context.support.ClassPathXmlApplicationContext]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from class path resource [at/sozvers/stp/zpv/dao/ContextBasic.xml]; nested exception is java.io.FileNotFoundException: class path resource [at/sozvers/stp/zpv/dao/ContextBasic.xml] cannot be opened because it does not exist The sad thing is that the resource at/sozvers/stp/zpv/dao/ContextBasic.xml actually is placed in a JAR in one of my EAR files which should be deployed before the WAR. And at least I get a message that the deployment of the EAR has been successful. I also looked into the JAR with my file archiver and the ContextBasic.xml is indeed there at the right place. Is there a way for me to get sure that the JAR, not the EAR as a whole, is really deployed to the JBoss? I'm already starting to lose my head about this issue. Thank you. Bernhard

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• grails scaffolding broken

  - by damian

  Grails scaffoldin does not work in my grails application. When I go from the main page to the specific controller page it output something like this: Error 500: Servlet: default URI: /myapp/myDomain/list Exception Message: Tag [sortableColumn] is missing required attribute [title] or [titleKey] at /webTestDummyDomain/list:25 Caused by: Error processing GroovyPageView: Tag [sortableColumn] is missing required attribute [title] or [titleKey] at /myDomain/list:25 Class: /myDomain/list At Line: [25] Code Snippet: Code snippet empty. If I try to create a new app scaffold works perfectly. Additional data: Application Status * App version: 0.1 * Grails version: 1.2.2 * JVM version: 1.6.0_20 * Controllers: 11 * Domains: 10 * Services: 19 * Tag Libraries: 26 Installed Plugins * i18n - 1.2.2 * filters - 1.2.2 * logging - 1.2.2 * core - 1.2.2 * tomcat - 1.2.2 * webtest - 2.0.4 * functionalTest - 1.2.7 * yui - 2.7.0.1 * rest - 0.3 * jquery - 1.4.2.1 * bubbling - 2.1.2 * urlMappings - 1.2.2 * groovyPages - 1.2.2 * servlets - 1.2.2 * dataSource - 1.2.2 * controllers - 1.2.2 * codecs - 1.2.2 * jqueryUi - 1.8-SNAPSHOT * grailsUi - 1.2-SNAPSHOT * domainClass - 1.2.2 * mimeTypes - 1.2.2 * scaffolding - 1.2.2 * converters - 1.2.2 * hibernate - 1.2.2 * validation - 1.2.2 * services - 1.2.2 Can you give me any pointer?

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• What makes merging in DVCS easy?

  - by afriza

  I read at Joel on Software: With distributed version control, the distributed part is actually not the most interesting part. The interesting part is that these systems think in terms of changes, not in terms of versions. and at HgInit: When we have to merge, Subversion tries to look at both revisions—my modified code, and your modified code—and it tries to guess how to smash them together in one big unholy mess. It usually fails, producing pages and pages of “merge conflicts” that aren’t really conflicts, simply places where Subversion failed to figure out what we did. By contrast, while we were working separately in Mercurial, Mercurial was busy keeping a series of changesets. And so, when we want to merge our code together, Mercurial actually has a whole lot more information: it knows what each of us changed and can reapply those changes, rather than just looking at the final product and trying to guess how to put it together. By looking at the SVN's repository folder, I have the impression that Subversion is maintaining each revisions as changeset. And from what I know, Hg is using both changeset and snapshot while Git is purely using snapshot to store the data. If my assumption is correct, then there must be other ways that make merging in DVCS easy. What are those?

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• Can't get automated release working with Hudson + Git + Maven Release Plugin

  - by Christopher Maier

  As the title says, I'm trying to get an automated release job working on Hudson. It's a Maven project, and all the code is in Git. Manually, I do the release on my personal machine like so: git checkout master mvn -B release:prepare release:perform This works perfectly. The Maven release plugin properly pushes the release tag to the origin repository as well as the next commit that bumps the version to the next SNAPSHOT. However, when I run this same Maven job through Hudson (either by creating my own "release" job or by using the M2 Release Plugin) it doesn't work so well. The release tag gets pushed out to the origin repository, and the release gets pushed out to our Nexus repository, but the subsequent commit that bumps the version to the next SNAPSHOT doesn't go out. Furthermore, the "master" branch in the origin repository doesn't get changed at all. I've looked in Hudson's workspace for the job, however, and the version has been updated. After looking at the output from the Hudson job, it appears that the Git plugin does not actually checkout "master", but rather it's SHA1 id. That is, if the "master" branch label points to commit "f6af76f541f1a1719e9835cdb46a183095af6861", Hudson does git checkout -f f6af76f541f1a1719e9835cdb46a183095af6861 instead of git checkout -f master As a result, the changes that the Maven release plugin is making are not actually on any branch (certainly not on "master") and these changes don't make it to the origin repository. It runs on the right code, but bookkeeping-wise, the changes seem to get lost because no branch label points to them. Has anybody gotten the Hudson + Git + Maven Release Plugin combo to work properly? Is there some additional configuration somewhere I can set to make this happen? Or is this a bug in the Hudson Git plugin? Thanks in advance.

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• CSS renders Input in firefox mac vs firefox PC. can i detect os via javascript? or maybe a CSS hack

  - by adardesign

  I have a input[type="text"] the that has padding applied to it behaves differently in firefox PC then on a mac. Any hacks that can target firefox PC? These styles are what its seen on firefox PC firebug .searchContainer input { border-color:#7C7C7C #C3C3C3 #DDDDDD; border-style:solid; border-width:1px; color:#555555; float:left; height:12px; padding:3px; } These styles are what its seen on firefox PC firebug .searchContainer input { border-color:#7C7C7C #C3C3C3 #DDDDDD; border-style:solid; border-width:1px; color:#555555; float:left; height:12px; padding:3px; } No other styles are applied to these inputs. Here is a snapshot of FF PC http://tinyurl.com/2wdxmq5 Here is a snapshot of FF mac http://tinyurl.com/2u7f2nl any suggestions?

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• SQL2008 merge replication fails to update depdendent items when table is added

  - by Dan Puzey

  Setup: an existing SQL2008 merge replication scenario. A large server database, including views and stored procs, being replicated to client machines. What I'm doing: * adding a new table to the database * mark the new table for replication (using SP_AddMergeArticle) * alter a view (which is already part of the replicated content) is updated to include fields from this new table (which is joined to the tables in the existing view). A stored procedure is similarly updated. The problem: the table gets replicated to client machines, but the view is not updated. The stored procedure is also not updated. Non-useful workaround: if I run the snapshot agent after calling SP_AddMergeArticle and before updating the view/SP, both the view and the stored procedure changes correctly replicate to the client. The bigger problem: I'm running a list of database scripts in a transaction, as part of a larger process. The snapshot agent can't be run during a transaction, and if I interrupt the transaction (e.g. by running the scripts in multiple transactions), I lose the ability to roll back the changes should something fail. Does anyone have any suggestions? It seems like I must be missing something obvious, because I don't see why the changes to the view/sproc wouldn't be replicating anyway, regardless of what's going on with the new table.

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• jndi binding on jboss4.2.3 and ejb3

  - by broschb

  I am trying to deploy a stateless ejb on jboss 4.2.3 using ejb3 annotations. Everything builds and deploys correctly, and I do not get any errors when jboss starts up. However the ejb is not getting bound to any JNDI location for lookup when I look at the bindings in jboss. Below is what I have for my ejb. Remote @Remote public interface TestWebService { public String TestWebMethod(String param1, String param2); } Stateless EJB @Stateless @RemoteBinding(jndiBinding="TestWeb") @Remote(TestWebService.class) public class TestWebServiceBean implements TestWebService{ public String TestWebMethod(String param1, String param2) { System.out.println("HELLO "+param1+" "+param2); return "Welcome!!"; } } I have tried not having the @Remote and @RemoteBinding and it doesn't make a difference. I have also added and ejb-jar.xml file (which should not be needed with ejb3) and that does not appear to make a difference. Below is the output I see in the jboss log on startup. installing MBean: jboss.j2ee:ear=ejb_web_service_ear-0.0.1- SNAPSHOT.ear,jar=ejb_web_service-0.0.1-SNAPSHOT.jar,name=TestWebServiceBean,service=EJB3 with dependencies: 21:56:00,633 INFO [EJBContainer] STARTED EJB: com.tomax.ejb.TestWebServiceBean ejbName: TestWebServiceBean

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• clojure: ExceptionInInitializerError in Namespace.<init> loading from a non-default classpath

  - by Charles Duffy

  In attempting to load an AOT-compiled class from a non-default classpath, I receive the following exception: Traceback (innermost last): File "test.jy", line 10, in ? at clojure.lang.Namespace.<init>(Namespace.java:34) at clojure.lang.Namespace.findOrCreate(Namespace.java:176) at clojure.lang.Var.internPrivate(Var.java:149) at aot_demo.JavaClass.<clinit>(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:247) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) java.lang.ExceptionInInitializerError: java.lang.ExceptionInInitializerError I'm able to reproduce this with the following trivial project.clj: (defproject aot-demo "0.1.0-SNAPSHOT" :dependencies [[org.clojure/clojure "1.3.0"]] :aot [aot-demo.core]) ...and src/aot_demo/core.clj defined as follows: (ns aot-demo.core (:gen-class :name aot_demo.JavaClass :methods [#^{:static true} [lower [java.lang.String] java.lang.String]])) (defn -lower [str] (.toLower str)) The following Jython script is then sufficient to trigger the bug: #!/usr/bin/jython import java.lang.Class import java.net.URLClassLoader import java.net.URL import os cl = java.net.URLClassLoader( [java.net.URL('file://%s/target/aot-demo-0.1.0-SNAPSHOT-standalone.jar' % (os.getcwd()))]) java.lang.Class.forName('aot_demo.JavaClass', True, cl) However, the exception does not occur if the test script is started with the uberjar already in the CLASSPATH variable. What's going on here? I'm trying to write a plugin for the BaseX database in Clojure; the above accurately represents how their plugin-loading mechanism works for the purpose of providing a SSCE for this problem.

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• CSS renders Input in firefox mac diffrent then firefox PC. can i detect OS via javascript? or maybe

  - by adardesign

  I have a input[type="text"] the that has padding applied to it behaves differently in firefox PC then on a mac. Any hacks that can target firefox PC? These styles are what its seen on firefox PC firebug .searchContainer input { border-color:#7C7C7C #C3C3C3 #DDDDDD; border-style:solid; border-width:1px; color:#555555; float:left; height:12px; padding:3px; } These styles are what its seen on firefox Mac firebug .searchContainer input { border-color:#7C7C7C #C3C3C3 #DDDDDD; border-style:solid; border-width:1px; color:#555555; float:left; height:12px; padding:3px; } No other styles are applied to these inputs. Here is a snapshot of FF PC http://tinyurl.com/2wdxmq5 Here is a snapshot of FF mac http://tinyurl.com/2u7f2nl any suggestions?

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• Periodically iterating over a collection that's constantly changing

  - by rwmnau

  I have a collection of objects that's constantly changing, and I want to display some information about objects (my application is multi-threaded, and differently threads are constantly submitting requests to modify an object in the collection, so it's unpredictable), and I want to display some information about what's currently in the collection. If I lock the collection, I can iterate over it and get my information without any problems - however, this causes problems with the other threads, since they could have submitted multiple requests to modify the collection in the meantime, and will be stalled. I've thought of a couple ways around this, and I'm looking for any advice. Make a copy of the collection and iterate over it, allowing the original to continue updating in the background. The collection can get large, so this isn't ideal, but it's safe. Iterate over it using a For...Next loop, and catch an IndexOutOfBounds exception if an item is removed from the collection while we're iterating. This may occasionally cause duplicates to appear in my snapshot, so it's not ideal either. Any other ideas? I'm only concerned about a moment-in-time snapshot, so I'm not concerned about reflecting changes in my application - my main concern is that the collection be able to be updated with minimal latency, and that updates never be lost.

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• Moving a high quality line on a panel c#

  - by user1787601

  I want to draw a line on a panel and then move it as the mouse moves. To do so, I draw the line and when the mouse moves I redraw the line to the new location and remove the previous line by drawing a line with the background color on it. It works fine if I do not use the high quality smoothing mode. But if use high quality smoothing mode, it leave traces on the panel. Does anybody know how to fix this? Thank you. Here is the code int x_previous = 0; int y_previous = 0; private void panel1_MouseMove(object sender, MouseEventArgs e) { Pen pen1 = new System.Drawing.Pen(Color.Black, 3); Pen pen2 = new System.Drawing.Pen(panel1.BackColor, 3); Graphics g = panel1.CreateGraphics(); g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.DrawLine(pen2, new Point(0, 0), new Point(x_previous, y_previous)); g.DrawLine(pen1, new Point(0, 0), new Point(e.Location.X, e.Location.Y)); x_previous = e.Location.X; y_previous = e.Location.Y; } Here is the snapshot with SmoothingMode Here is the snapshot without SmoothingMode

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• What happens when modifying Gemfile.lock directly?

  - by Mik378

  Since the second time of bundle install execution, dependencies are loaded from Gemfile.lock when Gemfile isn't changed. But I wonder how detection of changes is made between those two files. For instance, if I'm adding a new dependency directly into Gemfile.lock without adding it into Gemfile (as opposed to the best practice since Gemfile.lock is auto-generated from Gemfile), would a bundle install consider Gemfile as changed ? Indeed, does bundle install process compares the whole Gemfile and Gemfile.lock trees in order to detect changes? If it is, even if I'm adding a dependency directly to Gemfile.lock, Gemfile would be detected as changed (since different) and would re-erase Gemfile.lock (so losing the added dependency...) What is the process of bundle install since the launch for the second time ? To be more clear, my question is: Are changes based only from Gemfile ? That means bundler would keep a Gemfile snapshot of every bundle install execution number N and merely compares it to the bundle install execution N+1 ? Or none snapshot are created in bundler memory and bundler makes a comparison with Gemfile.lock each time to detect if Gemfile must be considered as changed.

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