Examples of javax.naming.Reference

javax.naming.Reference
This class represents a reference to an object that is found outside of the naming/directory system.
Reference provides a way of recording address information about objects which themselves are not directly bound to the naming/directory system.
A Reference consists of an ordered list of addresses and class information about the object being referenced. Each address in the list identifies a communications endpoint for the same conceptual object. The "communications endpoint" is information that indicates how to contact the object. It could be, for example, a network address, a location in memory on the local machine, another process on the same machine, etc. The order of the addresses in the list may be of significance to object factories that interpret the reference.
Multiple addresses may arise for various reasons, such as replication or the object offering interfaces over more than one communication mechanism. The addresses are indexed starting with zero.
A Reference also contains information to assist in creating an instance of the object to which this Reference refers. It contains the class name of that object, and the class name and location of the factory to be used to create the object. The class factory location is a space-separated list of URLs representing the class path used to load the factory. When the factory class (or any class or resource upon which it depends) needs to be loaded, each URL is used (in order) to attempt to load the class.
A Reference instance is not synchronized against concurrent access by multiple threads. Threads that need to access a single Reference concurrently should synchronize amongst themselves and provide the necessary locking. @author Rosanna Lee @author Scott Seligman @see RefAddr @see StringRefAddr @see BinaryRefAddr @since 1.3

            log.debug("started JMXConnector (" + url.toString() + ")" +
               (securityDomain!=null ? " domain=" + securityDomain : "") );
         }


         // For legacy access, bind a JMXAdapter to the JNDI names
         Reference reference = new Reference(MBeanServerConnection.class.getName(), JMXAdapter.class.getName(), null);
         reference.add(new StringRefAddr("JMXServiceURL", url.toString()));
         Util.rebind(context, JNDI_BIND_NAME, reference);
         Util.rebind(context, LEGACY_BIND_NAME, reference);
         //Object test = Util.lookup(context, JNDI_BIND_NAME, MBeanServerConnection.class);
         //log.info("test = " + test);
         SecurityFactory.prepare();

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   }
   
   public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?, ?> environment) throws Exception {
      if ( obj != null && obj instanceof Reference) {
         Reference ref = (Reference)obj;
         // The JMXServiceURL points to the jmx server
         RefAddr urlRef = ref.get("JMXServiceURL");
         String  url = (String)urlRef.getContent();
         JMXServiceURL jmxserviceURL = new JMXServiceURL(url);
         javax.management.remote.JMXConnector jmxc = null;
         jmxc = jmxConnectorMap.get(url);

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         oos.writeObject(theProxy);
         oos.close();
         byte[] proxyBytes = baos.toByteArray();
         BinaryRefAddr dsAddr = new BinaryRefAddr("ProxyData", proxyBytes);
         String factory = DataSourceFactory.class.getName();
         Reference dsRef = new Reference("javax.sql.DataSource", dsAddr, factory, null);
         referenceable.setReference(dsRef);
         // Set the VMID as the address local/remote indicator
         baos.reset();
         ObjectOutputStream oos2 = new ObjectOutputStream(baos);
         oos2.writeObject(DataSourceFactory.vmID);
         oos2.close();
         byte[] id = baos.toByteArray();
         BinaryRefAddr localAddr = new BinaryRefAddr("VMID", id);
         dsRef.add(localAddr);
         /* Bind the Referenceable connection factory into JNDI and set the
         JndiName value of the reference address for use by the DataSourceFactory
         when looking up the local factory from the NonSerializableFactory.
         */
         StringRefAddr jndiRef = new StringRefAddr("JndiName", bindName);
         dsRef.add(jndiRef);
         Util.rebind(ctx, bindName, cf);
         log.info("Bound ConnectionManager '" + serviceName + "' to JNDI name '" + bindName + "'");
      }
      catch (NamingException ne)
      {

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      // The helper class NonSerializableFactory uses address type nns, we go on to
      // use the helper class to bind the service object in JNDI
      //
      StringRefAddr addr = new StringRefAddr("nns", jndiName);
      Reference ref = new Reference(classType.getName(), addr, NonSerializableFactory.class.getName(), null);
      ctx.bind(n.get(0), ref);
   }

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      Context ctx = new InitialContext();
      parser = ctx.getNameParser("");


      RefAddr refAddr = new StringRefAddr("nns", "JSMCachePolicy");
      String factoryName = DefaultCacheObjectFactory.class.getName();
      Reference ref = new Reference("javax.naming.Context", refAddr, factoryName, null);
      ctx.rebind(DEFAULT_CACHE_POLICY_PATH, ref);
      log.debug("cachePolicyCtxPath="+cacheJndiName);


      // Bind the default SecurityProxyFactory instance under java:/SecurityProxyFactory
      SecurityProxyFactory proxyFactory = (SecurityProxyFactory) securityProxyFactoryClass.newInstance();

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      // The helper class NonSerializableFactory uses address type nns, we go on to
      // use the helper class to bind the service object in JNDI
      //
      StringRefAddr addr = new StringRefAddr("nns", jndiName);
      Reference ref = new Reference(classType.getName (), addr, NonSerializableFactory.class.getName (), null);
      ctx.rebind (n.get (0), ref);
   }

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            }
            else
            {
               // Get the invoker specific ejb-ref mappings
               Iterator it = beanMetaData.getInvokerBindings();
               Reference reference = null;
               while (it.hasNext())
               {
                  String invokerBinding = (String)it.next();
                  // Check for an invoker level jndi-name
                  String name = ref.getInvokerBinding(invokerBinding);
                  // Check for an global jndi-name
                  if (name == null)
                     name = ref.getJndiName();
                  if (name == null)
                  {
                     throw new DeploymentException("ejb-ref " + ref.getName() + ", expected either ejb-link in ejb-jar.xml or " + "jndi-name in jboss.xml");
                  }


                  StringRefAddr addr = new StringRefAddr(invokerBinding, name);
                  log.debug("adding " + invokerBinding + ":" + name + " to Reference");


                  if (reference == null)
                  {
                     reference = new Reference("javax.naming.LinkRef", ENCThreadLocalKey.class.getName(), null);
                  }
                  reference.add(addr);
               }


               // If there were invoker bindings create bind the reference
               if (reference != null)
               {
                  if (ref.getJndiName() != null)
                  {
                     // Add default for the bean level ejb-ref/jndi-name
                     StringRefAddr addr = new StringRefAddr("default", ref.getJndiName());
                     reference.add(addr);
                  }
                  if (reference.size() == 1 && reference.get("default") == null)
                  {
                     /* There is only one invoker binding and its not default so
                      create a default binding to allow the link to have a value
                      when accessed without an invoker active.
                      */
                     StringRefAddr addr = (StringRefAddr)reference.get(0);
                     String target = (String)addr.getContent();
                     StringRefAddr addr1 = new StringRefAddr("default", target);
                     reference.add(addr1);
                  }
                  Util.bind(envCtx, ref.getName(), reference);
               }
               else
               {

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   //


   public Reference getReference()
      throws NamingException
   {
      Reference ref = new Reference("org.jboss.tm.usertx.client.ClientUserTransaction",
         "org.jboss.tm.usertx.client.ClientUserTransactionObjectFactory",
         null);


      return ref;
   }

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      /* Create a mapping from the java:/jaas context to a SecurityDomainObjectFactory
      so that any lookup against java:/jaas/domain returns an instance of our
      security manager class.
      */
     RefAddr refAddr = new StringRefAddr("nns", "JSM");
     Reference ref = new Reference("javax.naming.Context", refAddr, factoryName, null);
     ctx.rebind(this.baseContext, ref); 
   }

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   public Object getObjectInstance(Object obj, Name name, Context nameCtx,
      Hashtable env)
      throws Exception
   {
      Context ctx = getInitialContext(env);
      Reference ref = (Reference) obj;
      RefAddr addr = ref.get("URL");
      String path = (String) addr.getContent();
      return ctx.lookup(path);
   }

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