Examples of org.apache.avalon.framework.service.ServiceManager

Package org.apache.avalon.framework.service

Examples of org.apache.avalon.framework.service.ServiceManager

org.apache.avalon.framework.service.ServiceManager
A ServiceManager selects Objects based on a role. The contract is that all the Objects implement the differing roles and there is one Object per role. If you need to select on of many Objects that implement the same role, then you need to use a ServiceSelector. Roles are usually the full interface name. A role is better understood by the analogy of a play. There are many different roles in a script. Any actor or actress can play any given part and you get the same results (phrases said, movements made, etc.). The exact nuances of the performance is different. Below is a list of things that might be considered the different roles:
- InputAdapter and OutputAdapter
- Store and Spool
The ServiceManager does not specify the methodology of getting the Object, merely the interface used to get it. Therefore the ServiceManager can be implemented with a factory pattern, an object pool, or a simple Hashtable. @author Avalon Development Team @version CVS $Revision: 1.17 $ $Date: 2004/02/11 14:34:25 $ @see org.apache.avalon.framework.service.Serviceable @see org.apache.avalon.framework.service.ServiceSelector

        throws Exception
    {
        final String key = Role3.ROLE;
        final String type = "PerThread";


        final ServiceManager serviceManager = getServiceManager();
        final BaseRole object1 = (BaseRole) serviceManager.lookup( key );
        final BaseRole object2 = (BaseRole) serviceManager.lookup( key );


        assertEquals( type + " object IDs (1 vs 2)", object1.getID(), object2.getID() );


        final Thread thread = new Thread()
        {
            public void run()
            {
                try
                {
                    final BaseRole object3 = (BaseRole) serviceManager.lookup( key );
                    final BaseRole object4 = (BaseRole) serviceManager.lookup( key );


                    assertTrue( type + " object IDs (1 vs 3)", object1.getID() != object3.getID() );
                    assertTrue( type + " object IDs (2 vs 4)", object2.getID() != object4.getID() );
                    assertEquals( type + " object IDs (3 vs 4)", object3.getID(), object4.getID() );
                }

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        throws Exception
    {
        final String key = Role4.ROLE;
        final String type = "Factory";


        final ServiceManager serviceManager = getServiceManager();
        final BaseRole object1 = (BaseRole) serviceManager.lookup( key );
        final BaseRole object2 = (BaseRole) serviceManager.lookup( key );


        assertTrue( type + " object IDs (1 vs 2)", object1.getID() != object2.getID() );


        final Thread thread = new Thread()
        {
            public void run()
            {
                try
                {
                    final BaseRole object3 = (BaseRole) serviceManager.lookup( key );
                    final BaseRole object4 = (BaseRole) serviceManager.lookup( key );


                    assertTrue( type + " object IDs (1 vs 3)", object1.getID() != object3.getID() );
                    assertTrue( type + " object IDs (2 vs 4)", object2.getID() != object4.getID() );
                    assertTrue( type + " object IDs (3 vs 4)", object3.getID() != object4.getID() );
                }

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    }


    public void testPoolable()
        throws Exception
    {
        final ServiceManager serviceManager = getServiceManager();
        final String key = Role2.ROLE;
        final BaseRole object1 = (BaseRole) serviceManager.lookup( key );
        final BaseRole object2 = (BaseRole) serviceManager.lookup( key );
        final BaseRole object3 = (BaseRole) serviceManager.lookup( key );


        serviceManager.release( object1 );
        serviceManager.release( object2 );
        serviceManager.release( object3 );
    }

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        final ContainerManager cm = new DefaultContainerManager( config.getContext() );
        ContainerUtil.initialize( cm );


        final DefaultContainer container = (DefaultContainer) cm.getContainer();
        final ServiceManager serviceManager = container.getServiceManager();
        return serviceManager;
    }

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     *
     * @throws Exception when there is an error.
     */
    protected void initializeServiceManager() throws Exception
    {
        final ServiceManager parent = (ServiceManager) get( m_rootContext, SERVICE_MANAGER, null );
        final DefaultServiceManager manager = new EAServiceManager( parent, getLogger().getChildLogger("compat") );


        /**
         * If there is a parent ServiceManager, we need to see if it has a SourceResolver,
         * and if not, make sure that one is available to fortress
         */


        if ( parent == null || !parent.hasService( SourceResolver.ROLE ) )
        {
            manager.put( SourceResolver.ROLE, m_defaultSourceResolver );
        }


        Object lem = get( m_rootContext, LifecycleExtensionManager.ROLE, null);

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        try
        {
            final Context implContext = m_contextManager.getChildContext();


            final ServiceManager serviceManager =
                    (ServiceManager) getContextEntry( managerContext, SERVICE_MANAGER );
            final LoggerManager loggerManager = 
                    (LoggerManager) serviceManager.lookup( LoggerManager.ROLE );


            ContainerUtil.enableLogging( instance, loggerManager.getDefaultLogger() );
            ContainerUtil.contextualize( instance, implContext );


            ContainerUtil.service( instance, serviceManager );

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        if (pageLocal == null) {
            pageLocal = new PageLocalScopeHolder(getTopLevelScope(this));
        }
        
        // The call context will use the current sitemap's service manager when looking up components
        ServiceManager sitemapManager;
        try {
            sitemapManager = (ServiceManager)avalonContext.get(ContextHelper.CONTEXT_SITEMAP_SERVICE_MANAGER);
        } catch (ContextException e) {
            throw new CascadingRuntimeException("Cannot get sitemap service manager", e);
        }

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        if (wk != null) {
            appleContext.put("continuation-id", wk.getId());
        }
        
//      Use the current sitemap's service manager for components
        ServiceManager sitemapManager;
        try {
            sitemapManager = (ServiceManager)avalonContext.get(ContextHelper.CONTEXT_SITEMAP_SERVICE_MANAGER);
        } catch (ContextException e) {
            throw new CascadingRuntimeException("Cannot get sitemap service manager", e);
        }

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                (int)org.mozilla.javascript.Context.toNumber(args[2]);
        }
        WebContinuation wk;
        Scriptable scope = getTopLevelScope(c);
        FOM_Cocoon cocoon = (FOM_Cocoon)getProperty(scope, "cocoon");
        ServiceManager componentManager =  cocoon.getServiceManager();
        ContinuationsManager contMgr = (ContinuationsManager)
            componentManager.lookup(ContinuationsManager.ROLE);
        wk = contMgr.createWebContinuation(c,
                                           (parent == null ? null : parent.getWebContinuation()),
                                           timeToLive,
                                           cocoon.getInterpreterId(), 
                                           null);

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    public void jsFunction_invalidate() throws Exception {
        ContinuationsManager contMgr = null;
        FOM_Cocoon cocoon =
            (FOM_Cocoon)getProperty(getTopLevelScope(this), "cocoon");
        ServiceManager componentManager = cocoon.getServiceManager();
        contMgr = (ContinuationsManager)
            componentManager.lookup(ContinuationsManager.ROLE);
        contMgr.invalidateWebContinuation(wk);
    }

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