Examples of javax.naming.LinkRef

javax.naming.LinkRef
This class represents a Reference whose contents is a name, called the link name, that is bound to an atomic name in a context.
The name is a URL, or a name to be resolved relative to the initial context, or if the first character of the name is ".", the name is relative to the context in which the link is bound.
Normal resolution of names in context operations always follow links. Resolution of the link name itself may cause resolution to pass through other links. This gives rise to the possibility of a cycle of links whose resolution could not terminate normally. As a simple means to avoid such non-terminating resolutions, service providers may define limits on the number of links that may be involved in any single operation invoked by the caller.
A LinkRef contains a single StringRefAddr, whose type is "LinkAddress", and whose contents is the link name. The class name field of the Reference is that of this (LinkRef) class.
LinkRef is bound to a name using the normal Context.bind()/rebind(), and DirContext.bind()/rebind(). Context.lookupLink() is used to retrieve the link itself if the terminal atomic name is bound to a link.
Many naming systems support a native notion of link that may be used within the naming system itself. JNDI does not specify whether there is any relationship between such native links and JNDI links.
A LinkRef instance is not synchronized against concurrent access by multiple threads. Threads that need to access a LinkRef instance concurrently should synchronize amongst themselves and provide the necessary locking. @author Rosanna Lee @author Scott Seligman @see LinkException @see LinkLoopException @see MalformedLinkException @see Context#lookupLink @since 1.3

   
   private void bindORB()
   {
      try
      {
         Util.rebind(getEnc(), "ORB", new LinkRef("java:/JBossCorbaORB"));
      }
      catch(NamingException e)
      {
         throw new RuntimeException(e);
      }

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            namingException.setRootCause(e);
            throw namingException;
         }
         try
         {
            Util.rebind(getEnc(), "TransactionSynchronizationRegistry", new LinkRef("java:TransactionSynchronizationRegistry"));
            log.debug("Linked java:comp/TransactionSynchronizationRegistry to JNDI name: java:TransactionSynchronizationRegistry");
         }
         catch (NamingException e)
         {
            NamingException namingException = new NamingException("Could not bind TransactionSynchronizationRegistry for ejb name " + ejbName + " into JNDI under jndiName: " + getEnc().getNameInNamespace() + "/" + "TransactionSynchronizationRegistry");

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//         Reference ref = new Reference(EJBContext.class.getName(), EJBContextFactory.class.getName(), null);
//         ref.add(new StringRefAddr("containerGuid", Ejb3Registry.guid(this)));
//         ref.add(new StringRefAddr("containerClusterUid", Ejb3Registry.clusterUid(this)));
//         ref.add(new StringRefAddr("isClustered", Boolean.toString(isClustered())));
         // TODO: a temporary measure until jboss-injection is in place
         LinkRef ref = new LinkRef("java:internal/EJBContext");
         Util.rebind(getEnc(), "EJBContext", ref);
      }
      catch (NamingException e)
      {
         throw new RuntimeException(e);

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   private void bindORB()
   {
      try
      {
         Util.rebind(getEnc(), "ORB", new LinkRef("java:/JBossCorbaORB"));
      }
      catch(NamingException e)
      {
         throw new RuntimeException(e);
      }

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    */
   private void bindTimerService() throws NamingException
   {
      // link to java:internal/TimerService (which is setup by
      // org.jboss.ejb3.timerservice.naming.TimerServiceBinder)
      LinkRef timerServiceLinkRef = new LinkRef("java:internal/TimerService");
      // bind to java:comp/TimerService
      Util.rebind(getEnc(), "TimerService", timerServiceLinkRef);
   }

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            namingException.setRootCause(e);
            throw namingException;
         }
         try
         {
            Util.rebind(getEnc(), "TransactionSynchronizationRegistry", new LinkRef("java:TransactionSynchronizationRegistry"));
            log.debug("Linked java:comp/TransactionSynchronizationRegistry to JNDI name: java:TransactionSynchronizationRegistry");
         }
         catch (NamingException e)
         {
            NamingException namingException = new NamingException("Could not bind TransactionSynchronizationRegistry for ejb name " + ejbName + " into JNDI under jndiName: " + getEnc().getNameInNamespace() + "/" + "TransactionSynchronizationRegistry");

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                    return value;
                }
            }
        }
        if (result instanceof LinkRef) {
            LinkRef ref = (LinkRef)result;
            result = lookup(ref.getLinkName());
        }
        if (result instanceof Reference) {
            try {
                result = NamingManager.getObjectInstance(result, null, null, this.environment);
            } catch (NamingException e) {

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        InitialContext context = new InitialContext();


        Context javaContext = (Context) context.lookup("java:");


        javaContext.bind("java:TransactionManager", new JndiUrlReference("java:comp/TransactionManager"));
        javaContext.bind("java:TransactionManagerLink", new LinkRef("java:comp/TransactionManager"));


        assertTrue(context.lookup("java:TransactionManager") instanceof TransactionManager);
        assertTrue(context.lookup("java:TransactionManagerLink") instanceof TransactionManager);


        new InitialContext().bind("java:foo", new LinkRef("java:comp/TransactionManager"));


        assertTrue(context.lookup("java:foo") instanceof TransactionManager);




    }

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            }
            bindings.put(normalize(referenceInfo.referenceName), reference);
        }


        for (ResourceEnvReferenceInfo referenceInfo : jndiEnc.resourceEnvRefs) {
            LinkRef linkRef = null;
            try {
                Class<?> type = Class.forName(referenceInfo.resourceEnvRefType, true, EJBContext.class.getClassLoader());
                if (EJBContext.class.isAssignableFrom(type)) {
                    String jndiName = "java:comp/EJBContext";
                    linkRef = new LinkRef(jndiName);
                    bindings.put(normalize(referenceInfo.resourceEnvRefName), linkRef);
                    continue;
                } else if (WebServiceContext.class.equals(type)) {
                    String jndiName = "java:comp/WebServiceContext";
                    linkRef = new LinkRef(jndiName);
                    bindings.put(normalize(referenceInfo.resourceEnvRefName), linkRef);
                    continue;
                } else if (TimerService.class.equals(type)) {
                    String jndiName = "java:comp/TimerService";
                    linkRef = new LinkRef(jndiName);
                    bindings.put(normalize(referenceInfo.resourceEnvRefName), linkRef);
                    continue;
                }
            } catch (ClassNotFoundException e) {
            }

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    private static Object normalize(final Object value) {
        try {


            if (!(value instanceof LinkRef)) return value;


            final LinkRef ref = (LinkRef) value;


            final RefAddr refAddr = ref.getAll().nextElement();


            final String address = refAddr.getContent().toString();


            if (address.startsWith("openejb:")) return value;


            if (!address.startsWith("java:")) {
                return new LinkRef("java:" + address);
            }


        } catch (Exception e) {
        }

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