GlassFish v3 is a modular (OSGi compliant), embeddable (runs in-VM) and extensible (supports non-Java apps) Application Server.

The extensible part is demonstrated by deployment of Rails and Grails applications. An example of embeddability is an in-VM Servlet. This blog demonstrates how a simple OSGi bundle can be easily created using Maven Bundle Plugin and deployed on v3 trunk.

1. Generate a simple Maven project using the command as shown below:
   
   

   ~/samples/v3 >mvn archetype:create -DarchetypeGroupId=org.apache.maven.archetypes -DgroupId=org.glassfish.samples.osgi.helloworld -DartifactId=helloworld [INFO] Scanning for projects... [INFO] Searching repository for plugin with prefix: 'archetype'. [INFO] Ignoring available plugin update: 2.0-alpha-3 as it requires Maven version 2.0.7 [INFO] Ignoring available plugin update: 2.0-alpha-2 as it requires Maven version 2.0.7 [INFO] Ignoring available plugin update: 2.0-alpha-1 as it requires Maven version 2.0.7 [INFO] ---------------------------------------------------------------------------- [INFO] Building Maven Default Project [INFO]    task-segment: [archetype:create] (aggregator-style) [INFO] ---------------------------------------------------------------------------- [INFO] Setting property: classpath.resource.loader.class => 'org.codehaus.plexus.velocity.ContextClassLoaderResourceLoader'. [INFO] Setting property: velocimacro.messages.on => 'false'. [INFO] Setting property: resource.loader => 'classpath'. [INFO] Setting property: resource.manager.logwhenfound => 'false'. [INFO] ************************************************************** [INFO] Starting Jakarta Velocity v1.4 [INFO] RuntimeInstance initializing. [INFO] Default Properties File: org/apache/velocity/runtime/defaults/velocity.properties [INFO] Default ResourceManager initializing. (class org.apache.velocity.runtime.resource.ResourceManagerImpl) [INFO] Resource Loader Instantiated: org.codehaus.plexus.velocity.ContextClassLoaderResourceLoader [INFO] ClasspathResourceLoader : initialization starting. [INFO] ClasspathResourceLoader : initialization complete. [INFO] ResourceCache : initialized. (class org.apache.velocity.runtime.resource.ResourceCacheImpl) [INFO] Default ResourceManager initialization complete. [INFO] Loaded System Directive: org.apache.velocity.runtime.directive.Literal [INFO] Loaded System Directive: org.apache.velocity.runtime.directive.Macro [INFO] Loaded System Directive: org.apache.velocity.runtime.directive.Parse [INFO] Loaded System Directive: org.apache.velocity.runtime.directive.Include [INFO] Loaded System Directive: org.apache.velocity.runtime.directive.Foreach [INFO] Created: 20 parsers. [INFO] Velocimacro : initialization starting. [INFO] Velocimacro : adding VMs from VM library template : VM_global_library.vm [ERROR] ResourceManager : unable to find resource 'VM_global_library.vm' in any resource loader. [INFO] Velocimacro : error using  VM library template VM_global_library.vm : org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource 'VM_global_library.vm' [INFO] Velocimacro :  VM library template macro registration complete. [INFO] Velocimacro : allowInline = true : VMs can be defined inline in templates [INFO] Velocimacro : allowInlineToOverride = false : VMs defined inline may NOT replace previous VM definitions [INFO] Velocimacro : allowInlineLocal = false : VMs defined inline will be  global in scope if allowed. [INFO] Velocimacro : initialization complete. [INFO] Velocity successfully started. [INFO] [archetype:create] [INFO] Defaulting package to group ID: org.glassfish.samples.osgi.helloworld [INFO] ---------------------------------------------------------------------------- [INFO] Using following parameters for creating Archetype: maven-archetype-quickstart:RELEASE [INFO] ---------------------------------------------------------------------------- [INFO] Parameter: groupId, Value: org.glassfish.samples.osgi.helloworld [INFO] Parameter: packageName, Value: org.glassfish.samples.osgi.helloworld [INFO] Parameter: basedir, Value: /Users/arungupta/samples/v3 [INFO] Parameter: package, Value: org.glassfish.samples.osgi.helloworld [INFO] Parameter: version, Value: 1.0-SNAPSHOT [INFO] Parameter: artifactId, Value: helloworld [INFO] ********************* End of debug info from resources from generated POM *********************** [INFO] Archetype created in dir: /Users/arungupta/samples/v3/helloworld [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------ [INFO] Total time: 1 second [INFO] Finished at: Wed Jun 25 10:07:27 PDT 2008 [INFO] Final Memory: 5M/10M [INFO] ------------------------------------------------------------------------

2. Change the generated App class in "src/main/java/org/glassfish/samples/osgi/helloworld" folder so that it looks like:
   
   

   package org.glassfish.samples.osgi.helloworld; import org.osgi.framework.BundleActivator; import org.osgi.framework.BundleContext; /**  * Hello world!  *  */ public class App implements BundleActivator {     public void start(BundleContext context) throws Exception {         System.out.println("Hey!");     }     public void stop(BundleContext context) throws Exception {         System.out.println("Bye!");     } }

   
   This is a trivial Activator class but sitll shows the key methods. The changes are highlighted in bold.
   
3. Update "pom.xml" with the following changes:
   
1. Change the <packaging> to "bundle" from the default value of "jar".
2. Add the <dependency> on "org.osgi.core".
3. Add the <plugin> maven-bundle-plugin and provide <instructions> to generate the appropriate MANIFEST.MF.
   

The updated "pom.xml" with changes highlighted in bold are shown below:



<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">   <modelVersion>4.0.0</modelVersion>   <groupId>org.glassfish.samples.osgi.helloworld</groupId>   <artifactId>helloworld</artifactId>   <packaging>bundle</packaging>   <version>1.0-SNAPSHOT</version>   <name>helloworld</name>   <url>http://maven.apache.org</url>   <dependencies>     <dependency>       <groupId>junit</groupId>       <artifactId>junit</artifactId>       <version>3.8.1</version>       <scope>test</scope>     </dependency>     <dependency>       <groupId>org.apache.felix</groupId>       <artifactId>org.osgi.core</artifactId>       <version>1.0.0</version>     </dependency>   </dependencies>   <build>     <plugins>       <plugin>         <groupId>org.apache.felix</groupId>         <artifactId>maven-bundle-plugin</artifactId>         <extensions>true</extensions>         <configuration>           <instructions>             <Export-Package>${pom.groupId}</Export-Package>             <Bundle-SymbolicName>${pom.artifactId}</Bundle-SymbolicName>             <Bundle-Activator>${pom.groupId}.App</Bundle-Activator>           </instructions>         </configuration>       </plugin>     </plugins>   </build> </project>

4. Generate the OSGi bundle as shown below:
   
   

   ~/samples/v3/helloworld >mvn install [INFO] Scanning for projects... [INFO] ---------------------------------------------------------------------------- [INFO] Building helloworld [INFO]    task-segment: [install] [INFO] ---------------------------------------------------------------------------- [INFO] [resources:resources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:compile] [INFO] Compiling 1 source file to /Users/arungupta/samples/v3/helloworld/target/classes [INFO] [resources:testResources] [INFO] Using default encoding to copy filtered resources. [INFO] [compiler:testCompile] [INFO] Compiling 1 source file to /Users/arungupta/samples/v3/helloworld/target/test-classes [INFO] [surefire:test] [INFO] Surefire report directory: /Users/arungupta/samples/v3/helloworld/target/surefire-reports -------------------------------------------------------  T E S T S ------------------------------------------------------- Running org.glassfish.samples.osgi.helloworld.AppTest Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.022 sec Results : Tests run: 1, Failures: 0, Errors: 0, Skipped: 0 [INFO] [bundle:bundle] [INFO] [install:install] [INFO] Installing /Users/arungupta/samples/v3/helloworld/target/helloworld-1.0-SNAPSHOT.jar to /Users/arungupta/.m2/repository/org/glassfish/samples/osgi/helloworld/helloworld/1.0-SNAPSHOT/helloworld-1.0-SNAPSHOT.jar [INFO] [bundle:install] [INFO] Parsing file:/Users/arungupta/.m2/repository/repository.xml [INFO] Installing org/glassfish/samples/osgi/helloworld/helloworld/1.0-SNAPSHOT/helloworld-1.0-SNAPSHOT.jar [INFO] Writing OBR metadata [INFO] ------------------------------------------------------------------------ [INFO] BUILD SUCCESSFUL [INFO] ------------------------------------------------------------------------ [INFO] Total time: 4 seconds [INFO] Finished at: Wed Jun 25 10:20:27 PDT 2008 [INFO] Final Memory: 22M/54M [INFO] ------------------------------------------------------------------------

   
   The generated "target/helloworld-1.0-SNAPSHOT.jar" has the following contents:
   
   

   META-INF/MANIFEST.MF META-INF/ META-INF/maven/ META-INF/maven/org.glassfish.samples.osgi.helloworld/ META-INF/maven/org.glassfish.samples.osgi.helloworld/helloworld/ META-INF/maven/org.glassfish.samples.osgi.helloworld/helloworld/pom.properties META-INF/maven/org.glassfish.samples.osgi.helloworld/helloworld/pom.xml org/ org/glassfish/ org/glassfish/samples/ org/glassfish/samples/osgi/ org/glassfish/samples/osgi/helloworld/ org/glassfish/samples/osgi/helloworld/App.class

   
   And the generated "MANIFEST.MF" looks like:
   
   

   Manifest-Version: 1.0 Export-Package: org.glassfish.samples.osgi.helloworld;uses:="org.osgi.  framework" Built-By: arungupta Tool: Bnd-0.0.255 Bundle-Name: helloworld Created-By: Apache Maven Bundle Plugin Bundle-Version: 1.0.0.SNAPSHOT Build-Jdk: 1.6.0_05 Bnd-LastModified: 1214414426851 Bundle-ManifestVersion: 2 Bundle-Activator: org.glassfish.samples.osgi.helloworld.App Import-Package: org.glassfish.samples.osgi.helloworld,org.osgi.framewo  rk;version="1.3" Bundle-SymbolicName: helloworld

Now let's install this newly created bundle using Felix shell in GlassFish v3. Check out and build GlassFish v3 workspace as explained in TOTD #33. Unzip "~/workspaces/glassfish/v3/distributions/web/target/web.zip" and enable Felix TUI as explained in TOTD #34.

5. Start GlassFish v3 as:
   
   

   ~/testbed/glassfish/v3/snapshot/glassfish >java -jar modules/glassfish-10.0-SNAPSHOT.jar Jun 25, 2008 4:09:19 PM com.sun.enterprise.glassfish.bootstrap.ASMain main INFO: Launching GlassFish on Apache Felix OSGi platform Jun 25, 2008 4:09:19 PM com.sun.enterprise.glassfish.bootstrap.ASMainOSGi getSharedRepos INFO: /Users/arungupta/testbed/glassfish/v3/snapshot/glassfish/domains/domain1/lib does not exist Welcome to Felix. ================= Jun 25, 2008 4:09:20 PM HK2Main start INFO: contextRootDir = /Users/arungupta/testbed/glassfish/v3/snapshot/glassfish/modules Jun 25, 2008 4:09:20 PM OSGiFactoryImpl initialize INFO: Singleton already initialized as com.sun.enterprise.module.impl.HK2Factory@3d44d0c6 Jun 25, 2008 4:09:20 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.common.glassfish-mbeanserver [19] Jun 25, 2008 4:09:20 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.core.kernel [51] Jun 25, 2008 4:09:21 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.common.glassfish-naming [8] Jun 25, 2008 4:09:21 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.admin.config-api [43] Jun 25, 2008 4:09:21 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.common.internal-api [33] Jun 25, 2008 4:09:21 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.deployment.deployment-common [10] Jun 25, 2008 4:09:21 PM  INFO: JMXMP connector server URL = service:jmx:jmxmp://localhost:8888 Jun 25, 2008 4:09:21 PM com.sun.enterprise.v3.services.impl.GrizzlyProxy start INFO: Listening on port 8080 Jun 25, 2008 4:09:21 PM com.sun.enterprise.v3.services.impl.GrizzlyProxy start INFO: Listening on port 8181 Jun 25, 2008 4:09:21 PM com.sun.enterprise.v3.services.impl.GrizzlyProxy start INFO: Listening on port 4848 Jun 25, 2008 4:09:21 PM OSGiModuleImpl loadClass INFO: Started bundle org.glassfish.common.container-common [21] Jun 25, 2008 4:09:22 PM com.sun.enterprise.v3.admin.adapter.AdminConsoleAdapter setContextRoot INFO: Admin Console Adapter: context root: /admin Jun 25, 2008 4:09:22 PM com.sun.enterprise.v3.server.AppServerStartup run INFO: Glassfish v3 started in 1789 ms Jun 25, 2008 4:09:22 PM  INFO: -> Jun 25, 2008 4:09:22 PM com.sun.enterprise.glassfish.bootstrap.ASMainFelix launchOSGiFW INFO: Framework successfully started

6. Install the Hello World bundle as:
   
   

   install file:///Users/arungupta/samples/v3/helloworld/target/helloworld-1.0-SNAP... Jun 25, 2008 4:10:19 PM  INFO: Bundle ID: 75 Jun 25, 2008 4:10:19 PM  INFO: ->

   
   The command output shows "75" as the process id. This id is used to start/stop/uninstall the bundle later.
   
7. Check the bundle status
   
   

   ps      Jun 25, 2008 4:10:27 PM  INFO: START LEVEL 1 Jun 25, 2008 4:10:27 PM  INFO:    ID   State         Level  Name Jun 25, 2008 4:10:27 PM  INFO: [   0] [Active     ] [    0] System Bundle (1.0.4) Jun 25, 2008 4:10:27 PM  INFO: [   1] [Active     ] [    1] org.jvnet.tiger-types repackaged as module (0.3.2) Jun 25, 2008 4:10:27 PM  . . . INFO: [  71] [Installed  ] [    1] Web module command line interface (10.0.0.SNAPSHOT) Jun 25, 2008 4:10:27 PM  INFO: [  72] [Installed  ] [    1] Admin GUI Web Container Plugin (10.0.0.SNAPSHOT) Jun 25, 2008 4:10:27 PM  INFO: [  75] [Installed  ] [    1] helloworld (1.0.0.SNAPSHOT) Jun 25, 2008 4:10:27 PM  INFO: ->

   
   The last log output shows the newly added process.
   
8. Start the bundle as:
   
   

   start 75 Jun 25, 2008 4:10:32 PM  INFO: Hey! Jun 25, 2008 4:10:32 PM  INFO: ->

   
   This fragment shows "Hey!" output printed from the start method of Activator.
   
9. Stop the bundle as:
   
   

   stop 75 Jun 25, 2008 4:10:35 PM  INFO: Bye! Jun 25, 2008 4:10:35 PM  INFO: ->

   
   This fragment shows "Bye!" output printed from the stop method of Activator.
   
10. And finally uninstall the bundle as:
    
    

    uninstall 75 Jun 25, 2008 4:10:42 PM  INFO: ->

So following this blog you can deploy any of your OSGi bundles in GlassFish v3.

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