Examples of org.apache.avalon.framework.component.ComponentManager

Package org.apache.avalon.framework.component

Examples of org.apache.avalon.framework.component.ComponentManager

org.apache.avalon.framework.component.ComponentManager
A ComponentManager selects Components based on a role. The contract is that all the Components implement the differing roles and there is one Component per role. If you need to select on of many Components that implement the same role, then you need to use a ComponentSelector. 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 ComponentManager does not specify the methodology of getting the Component, merely the interface used to get it. Therefore the ComponentManager can be implemented with a factory pattern, an object pool, or a simple Hashtable.

Deprecated: Use {@link org.apache.avalon.framework.service.ServiceManager} instead.
@see org.apache.avalon.framework.component.Component @see org.apache.avalon.framework.component.Composable @see org.apache.avalon.framework.component.ComponentSelector @author Avalon Development Team @version CVS $Revision: 1.21 $ $Date: 2004/02/11 14:34:24 $

    public Object jsFunction_inputModuleGetAttribute(String type, String attribute)
        throws Exception
    {
        // since no new components can be declared on sitemap we could
        // very well use the 'other' one here. Anyway, since it's there...
        ComponentManager sitemapManager = CocoonComponentManager.getSitemapComponentManager();
        ComponentSelector inputSelector = (ComponentSelector)sitemapManager
            .lookup(InputModule.ROLE + "Selector");
        InputModule input = (InputModule) inputSelector.select(type);
        Object result = null;
        try {
            result = input.getAttribute(attribute, null,

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                                                    Object value)
        throws Exception
    {
        // since no new components can be declared on sitemap we could
        // very well use the 'other' one here. Anyway, since it's there...
        ComponentManager sitemapManager = CocoonComponentManager.getSitemapComponentManager();
        ComponentSelector outputSelector = (ComponentSelector)sitemapManager
            .lookup(OutputModule.ROLE + "Selector");
        OutputModule output = (OutputModule) outputSelector.select(type);
        try {
            output.setAttribute(null, this.environment.getObjectModel(), attribute,
                                jsobjectToObject(value));

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    public void jsFunction_outputModuleCommit(String type)
        throws Exception
    {
        // since no new components can be declared on sitemap we could
        // very well use the 'other' one here. Anyway, since it's there...
        ComponentManager sitemapManager = CocoonComponentManager.getSitemapComponentManager();
        ComponentSelector outputSelector = (ComponentSelector)sitemapManager
            .lookup(OutputModule.ROLE + "Selector");
        OutputModule output = (OutputModule) outputSelector.select(type);
        try {
            output.commit(null, this.environment.getObjectModel());
        } finally {

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    public void jsFunction_outputModuleRollback(String type)
        throws Exception
    {
        // since no new components can be declared on sitemap we could
        // very well use the 'other' one here. Anyway, since it's there...
        ComponentManager sitemapManager = CocoonComponentManager.getSitemapComponentManager();
        ComponentSelector outputSelector = (ComponentSelector)sitemapManager
            .lookup(OutputModule.ROLE + "Selector");
        OutputModule output = (OutputModule) outputSelector.select(type);
        try {
            output.rollback(null, this.environment.getObjectModel(), null);
        } finally {

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                                         Function ctorObj, 
                                         boolean inNewExpr)
    throws Exception
  {
    JSCocoon cocoon = (JSCocoon)args[0];
    ComponentManager manager = cocoon.getComponentManager();


    ContinuationsManager contMgr
      = (ContinuationsManager)manager.lookup(ContinuationsManager.ROLE);


    Object kont = args[1];
    JSWebContinuation pjswk = (JSWebContinuation)args[2];
    WebContinuation pwk = (pjswk == null ? null : pjswk.wk);

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                ModifiableSource ws = (ModifiableSource) source;


                frag.normalize();


                if ( null != serializerName) {
          ComponentManager manager = CocoonComponentManager.getSitemapComponentManager();


                  ComponentSelector selector = null;
                  Serializer serializer = null;
                  OutputStream oStream = null;
                  try {
                       selector = (ComponentSelector)manager.lookup(Serializer.ROLE + "Selector");
                       serializer = (Serializer)selector.select(serializerName);
                       oStream = ws.getOutputStream();
                       serializer.setOutputStream(oStream);
                         serializer.startDocument();
                       DOMStreamer streamer = new DOMStreamer(serializer);
                       streamer.stream(frag);
                         serializer.endDocument();
                  } catch (ComponentException e) {
                    throw new ProcessingException("Unable to lookup serializer.", e);
          } finally {
                      if (oStream != null) {
                          oStream.flush();
                          try {
                              oStream.close();
                          } catch (Exception ignore) {
                            }
                        }
            if ( selector != null ) {
              selector.release( serializer );
              manager.release( selector );
            }
                  }
                } else {
                  final String content = XMLUtils.serializeNode(frag,
                                             XMLUtils.defaultSerializeToXMLFormat(false));
                  OutputStream oStream = ws.getOutputStream();
  
                  oStream.write(content.getBytes());
                  oStream.flush();
                  oStream.close();
                }
            } else {
              String content;
        if ( null != serializerName) {
          ComponentManager  manager = CocoonComponentManager.getSitemapComponentManager();
                    
                    ComponentSelector selector = null;
                    Serializer serializer = null;
                    ByteArrayOutputStream oStream = new ByteArrayOutputStream();
                    try {
                        selector = (ComponentSelector)manager.lookup(Serializer.ROLE + "Selector");
                        serializer = (Serializer)selector.select(serializerName);
                        serializer.setOutputStream(oStream);
                        serializer.startDocument();
                        DOMStreamer streamer = new DOMStreamer(serializer);
                        streamer.stream(frag);
                        serializer.endDocument();
          } catch (ComponentException e) {
            throw new ProcessingException("Unable to lookup serializer.", e);
                    } finally {
                        if (oStream != null) {
                            oStream.flush();
                            try {
                                oStream.close();
                            } catch (Exception ignore) {
                            }
                        }
            if ( selector != null ) {
              selector.release( serializer );
              manager.release( selector );
            }
                    }
          content = oStream.toString();
        } else {
                    content = XMLUtils.serializeNode(frag,

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    protected Object makeNewServiceObject(
        MessageContext msgContext, String role
    )
        throws Exception
    {
        ComponentManager manager =
            (ComponentManager) msgContext.getProperty(COMPONENT_MANAGER);


        if (manager == null)
            throw new AxisFault("Could not access Avalon ComponentManager");


        return decorate(manager.lookup(role), manager);
    }

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        } catch (Exception e) {
            log("Invalid timeout setting: " + getInitParameter("timeout"));
        }
        gatewayServer = getInitParameter("gateway");
        gatewayPort = getInitParameter("gatewayPort");
        ComponentManager compMgr = (ComponentManager)getMailetContext().getAttribute(Constants.AVALON_COMPONENT_MANAGER);
        String outgoingPath = getInitParameter("outgoing");
        if (outgoingPath == null) {
            outgoingPath = "file:///../var/mail/outgoing";
        }


        try {
            // Instantiate the a MailRepository for outgoing mails
            MailStore mailstore = (MailStore) compMgr.lookup("org.apache.james.services.MailStore");


            DefaultConfiguration spoolConf
                = new DefaultConfiguration("repository", "generated:RemoteDelivery.java");
            spoolConf.setAttribute("destinationURL", outgoingPath);
            spoolConf.setAttribute("type", "SPOOL");

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     * If none is specified, the method returns <code>null</code>.
     *
     * @return the parent component manager, or <code>null</code>.
     */
    private synchronized ComponentManager getParentComponentManager() {
        ComponentManager parentComponentManager = null;
        if (parentComponentManagerClass != null) {
            try {
                String initParam = null;
                int dividerPos = parentComponentManagerClass.indexOf('/');
                if (dividerPos != -1) {

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        if (config == null) {
            getLogger().debug("Sitemap has no components definition at " + tree.getLocation());
            config = new DefaultConfiguration("", "");
        }


        ComponentManager manager = new CocoonComponentManager(this.parentManager);


        LifecycleHelper.setupComponent(manager,
            getLogger(),
            this.context,
            this.parentManager,
            this.roleManager,
            this.logKit,
            config
        );


        // Set parent of all selectors.
        if (this.parentManager != null) {


            for (int i = 0; i < ComponentsSelector.SELECTOR_ROLES.length; i++) {


                String role = ComponentsSelector.SELECTOR_ROLES[i];


                ComponentSelector parentSelector = null;
                try {
                    parentSelector = (ComponentSelector)this.parentManager.lookup(role);
                } catch(Exception e) {
                    // ignore and keep it null
                }


                if (parentSelector != null) {


                    ExtendedComponentSelector localSelector = null;
                    try {
                        localSelector = (ExtendedComponentSelector)manager.lookup(role);


                        if (localSelector != parentSelector) {
                            // local selector wasn't given by chaining to the parent manager
                            localSelector.setParentSelector(parentSelector);
                        }
                        manager.release(localSelector);


                    } catch(Exception e) {
                        // ignore
                    }

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org.apache.cocoon.components.flow.javascript.JSCocoon

org.apache.cocoon.components.flow.javascript.JSWebContinuation

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