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From Christina Kaskoura <christina.kasko...@eurodyn.com>
Subject Re: Using Struts2 OSGi plugin with GlassFish
Date Wed, 09 Jan 2013 07:37:02 GMT
Hi Martin.

In struts2-osgi-plugin.jar there is no .\META-INF\maven\plugin.xml file. 
I assume you mean the .\struts-plugin.xml file? Also if I understand 
correctly there is no existing implementation of the PackageProvider 
which can work with GlassFish, I will just have to implement my own, is 
that right?


On 08/01/2013 21:30, Martin Gainty wrote:
> The beauty of implementing a maven-plugin is that all attributes of 
> the plugin are configurable
>
> open struts2-osgi-plugin.jar
>
> edit
> .\META-INF\maven\plugin.xml
>
> look for
> <bean name="osgi" 
> type="com.opensymphony.xwork2.config.PackageProvider" 
> class="org.apache.struts2.osgi.OsgiConfigurationProvider" />
>
> as long as your com.opensymphony.xwork2.config.PackageProvider (felix 
> provider) implements interfaces
> com.opensymphony.xwork2.config.PackageProvider
> org.osgi.framework.BundleListener
>
> then substitute in the felix PackageProvider to class attribute at
>
> <bean name="osgi" 
> type="com.opensymphony.xwork2.config.PackageProvider" 
> class="org.apache.struts2.osgi.OsgiConfigurationProvider" />
>
>
> save .\META-INF\maven\plugin.xml
> /
> close
> /
> rejar
> /
> place struts2-osgi-plugin.jar back into lib folder (after saving 
> original as struts2-osgi-plugin.jar.original)
>
> if you do not redirect the PackageProvider this Struts-osgi-Listener 
> will be called as seen here from Provider code
>
> org.apache.struts2.osgi.OsgiConfigurationProvider
>
> public class OsgiConfigurationProvider implements PackageProvider, 
> BundleListener {
>     private static final Logger LOG = 
> LoggerFactory.getLogger(OsgiConfigurationProvider.class);
>
>     private Configuration configuration;
>     private ObjectFactory objectFactory;
>
>     private OsgiHost osgiHost;
>     private BundleContext bundleContext;
>     private BundleAccessor bundleAccessor;
>     private boolean bundlesChanged = false;
>     private ServletContext servletContext;
>
>     public void init(Configuration configuration) throws 
> ConfigurationException {
>         osgiHost = (OsgiHost) 
> servletContext.getAttribute(StrutsOsgiListener.OSGI_HOST);
>         bundleContext = osgiHost.getBundleContext();
>         bundleAccessor.setBundleContext(bundleContext);
>         bundleAccessor.setOsgiHost(osgiHost);
>         this.configuration = configuration;
>
>         //this class loader interface can be used by other plugins to 
> lookup resources
>         //from the bundles. A temporary class loader interface is set 
> during other configuration
>         //loading as well
> servletContext.setAttribute(ClassLoaderInterface.CLASS_LOADER_INTERFACE, 
> new BundleClassLoaderInterface());
>     }
>
> where servletContext Listener is set to
>   org.apache.struts2.osgi.StrutsOsgiListener
>
> public class StrutsOsgiListener implements ServletContextListener {
>     public static final String OSGI_HOST = "__struts_osgi_host";
>     private FelixOsgiHost osgiHost;
>     public void contextInitialized(ServletContextEvent sce) {
>         ServletContext servletContext = sce.getServletContext();
>         osgiHost = new FelixOsgiHost();
>         servletContext.setAttribute(OSGI_HOST, osgiHost);
>         try {
>             osgiHost.init(servletContext);
>         } catch (Exception e) {
>             throw new StrutsException("Apache Felix failed to start", e);
>         }
>     }
>
> org.apache.struts2.osgi.FelixOsgiHost init will be called
>
>    public void init(ServletContext servletContext) {
>         this.servletContext = servletContext;
>         startFelix();
>     }
>
>   protected void startFelix() {
>         //load properties from felix embedded file
>         Properties configProps = getProperties("default.properties");
>         // Copy framework properties from the system properties.
>         Main.copySystemProperties(configProps);
>         replaceSystemPackages(configProps);
>         //struts, xwork and felix exported packages
>         Properties strutsConfigProps = 
> getProperties("struts-osgi.properties");
>         addExportedPackages(strutsConfigProps, configProps);
>         //find bundles and adde em to autostart property
>         addAutoStartBundles(configProps);
>         // Bundle cache
>         String storageDir = System.getProperty("java.io.tmpdir") + 
> ".felix-cache";
>         configProps.setProperty(Constants.FRAMEWORK_STORAGE, storageDir);
>         if (LOG.isDebugEnabled())
>             LOG.debug("Storing bundles at [#0]", storageDir);
>         String cleanBundleCache = 
> getServletContextParam("struts.osgi.clearBundleCache", "true");
>         if ("true".equalsIgnoreCase(cleanBundleCache)) {
>             if (LOG.isDebugEnabled())
>                 LOG.debug("Clearing bundle cache");
> configProps.put(FelixConstants.FRAMEWORK_STORAGE_CLEAN, 
> FelixConstants.FRAMEWORK_STORAGE_CLEAN_ONFIRSTINIT);
>         }
>         //other properties
>         configProps.put(FelixConstants.SERVICE_URLHANDLERS_PROP, "false");
>         configProps.put(FelixConstants.LOG_LEVEL_PROP, 
> getServletContextParam("struts.osgi.logLevel", "1"));
>         configProps.put(FelixConstants.BUNDLE_CLASSPATH, ".");
> configProps.put(FelixConstants.FRAMEWORK_BEGINNING_STARTLEVEL, 
> getServletContextParam("struts.osgi.runLevel", "3"));
>         try {
>             List<BundleActivator> list = new ArrayList<BundleActivator>();
>             list.add(new AutoActivator(configProps));
> configProps.put(FelixConstants.SYSTEMBUNDLE_ACTIVATORS_PROP, list);
>             felix = new Felix(configProps);
>             felix.start();
>             if (LOG.isTraceEnabled())
>                 LOG.trace("Apache Felix is running");
>         }
>         catch (Exception ex) {
>             throw new ConfigurationException("Couldn't start Apache 
> Felix", ex);
>         }
>
> http://blogs.atlassian.com/2007/07/osgi_plugin_for_struts_2_lesso/
>
> Martin
> ______________________________________________
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>
>
> > Date: Tue, 8 Jan 2013 12:04:32 +0200
> > From: christina.kaskoura@eurodyn.com
> > To: user@struts.apache.org
> > Subject: Using Struts2 OSGi plugin with GlassFish
> >
> > Hello.
> >
> > I am trying to use the Struts2 OSGi plugin and have tried creating a 
> web
> > application containing the struts2-osgi-demo-bundle. All goes well when
> > deploying the application on Tomcat, however when I try deploying on
> > GlassFish (which has Felix included) I get a number of errors which I
> > understand are due to the fact that the plugin starts a new Felix
> > instance while another one is already running on GlassFish and that
> > certain Felix classes are present more than one times in the classpath
> > (one from the Felix jars included in the application as dependencies of
> > the plugin and one from the felix.jar already included in GlassFish).
> > More details on the actual errors are available in this stackoverflow
> > post -
> > 
> http://stackoverflow.com/questions/14200300/using-struts2-osgi-plugin-with-glassfish.
> >
> > My question is: is there any specific configuration I should make in
> > order to use the OSGi plugin in GlassFish (or any other container
> > including Felix for that matter)?
> >
> > Thank you,
> > Christina
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: user-help@struts.apache.org
> >


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