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

        return _connectionURL.toString();
    }


    public Reference getReference() throws NamingException
    {
        return new Reference(AMQConnection.class.getName(), new StringRefAddr(AMQConnection.class.getName(), toURL()),
                             AMQConnectionFactory.class.getName(), null); // factory location
    }

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        }


        // Binding a User Transaction reference
        if (container instanceof Context) {
            try {
                Reference ref = new TransactionRef();
                compCtx.bind("UserTransaction", ref);
                ContextTransaction transaction = namingResources.getTransaction();
                if (transaction != null) {
                    Iterator<String> params = transaction.listProperties();
                    while (params.hasNext()) {
                        String paramName = params.next();
                        String paramValue = (String) transaction.getProperty(paramName);
                        StringRefAddr refAddr = new StringRefAddr(paramName, paramValue);
                        ref.add(refAddr);
                    }
                }
            } catch (NameAlreadyBoundException e) {
                // Ignore because UserTransaction was obviously
                // added via ResourceLink

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     * Set the specified EJBs in the naming context.
     */
    public void addEjb(ContextEjb ejb) {


        // Create a reference to the EJB.
        Reference ref = new EjbRef
            (ejb.getType(), ejb.getHome(), ejb.getRemote(), ejb.getLink());
        // Adding the additional parameters, if any
        Iterator<String> params = ejb.listProperties();
        while (params.hasNext()) {
            String paramName = params.next();
            String paramValue = (String) ejb.getProperty(paramName);
            StringRefAddr refAddr = new StringRefAddr(paramName, paramValue);
            ref.add(refAddr);
        }
        try {
            createSubcontexts(envCtx, ejb.getName());
            envCtx.bind(ejb.getName(), ref);
        } catch (NamingException e) {

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            else
                service.setJaxrpcmappingfile(jaxrpcURL.toString());
        }


        // Create a reference to the resource.
        Reference ref = new ServiceRef
            (service.getName(), service.getType(), service.getServiceqname(),
             service.getWsdlfile(), service.getJaxrpcmappingfile());
        // Adding the additional port-component-ref, if any
        Iterator<String> portcomponent = service.getServiceendpoints();
        while (portcomponent.hasNext()) {
            String serviceendpoint = portcomponent.next();
            StringRefAddr refAddr = new StringRefAddr(ServiceRef.SERVICEENDPOINTINTERFACE, serviceendpoint);
            ref.add(refAddr);
            String portlink = service.getPortlink(serviceendpoint);
            refAddr = new StringRefAddr(ServiceRef.PORTCOMPONENTLINK, portlink);
            ref.add(refAddr);
        }
        // Adding the additional parameters, if any
        Iterator<String> handlers = service.getHandlers();
        while (handlers.hasNext()) {
            String handlername = handlers.next();

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     * Set the specified resources in the naming context.
     */
    public void addResource(ContextResource resource) {


        // Create a reference to the resource.
        Reference ref = new ResourceRef
            (resource.getType(), resource.getDescription(),
             resource.getScope(), resource.getAuth(),
             resource.getSingleton());
        // Adding the additional parameters, if any
        Iterator<String> params = resource.listProperties();
        while (params.hasNext()) {
            String paramName = params.next();
            String paramValue = (String) resource.getProperty(paramName);
            StringRefAddr refAddr = new StringRefAddr(paramName, paramValue);
            ref.add(refAddr);
        }
        try {
            if (logger.isDebugEnabled()) {
                logger.debug("  Adding resource ref "
                             + resource.getName() + "  " + ref);
            }
            createSubcontexts(envCtx, resource.getName());
            envCtx.bind(resource.getName(), ref);
        } catch (NamingException e) {
            logger.error(sm.getString("naming.bindFailed", e));
        }


        if ("javax.sql.DataSource".equals(ref.getClassName()) &&
                resource.getSingleton()) {
            try {
                ObjectName on = createObjectName(resource);
                Object actualResource = envCtx.lookup(resource.getName());
                Registry.getRegistry(null, null).registerComponent(actualResource, on, null);

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     * Set the specified resources in the naming context.
     */
    public void addResourceEnvRef(ContextResourceEnvRef resourceEnvRef) {


        // Create a reference to the resource env.
        Reference ref = new ResourceEnvRef(resourceEnvRef.getType());
        // Adding the additional parameters, if any
        Iterator<String> params = resourceEnvRef.listProperties();
        while (params.hasNext()) {
            String paramName = params.next();
            String paramValue = (String) resourceEnvRef.getProperty(paramName);
            StringRefAddr refAddr = new StringRefAddr(paramName, paramValue);
            ref.add(refAddr);
        }
        try {
            if (logger.isDebugEnabled())
                log.debug("  Adding resource env ref " + resourceEnvRef.getName());
            createSubcontexts(envCtx, resourceEnvRef.getName());

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     * Set the specified resource link in the naming context.
     */
    public void addResourceLink(ContextResourceLink resourceLink) {


        // Create a reference to the resource.
        Reference ref = new ResourceLinkRef
            (resourceLink.getType(), resourceLink.getGlobal(), resourceLink.getFactory(), null);
        Iterator<String> i = resourceLink.listProperties();
        while (i.hasNext()) {
            String key = i.next().toString();
            Object val = resourceLink.getProperty(key);
            if (val!=null) {
                StringRefAddr refAddr = new StringRefAddr(key, val.toString());
                ref.add(refAddr);
            }
        }
        javax.naming.Context ctx =
            "UserTransaction".equals(resourceLink.getName())
            ? compCtx : envCtx;

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  public Object getObjectInstance(Object refObj,
                                  Name nm,
                                  Context ctx,
                                  Hashtable env) throws Exception {


    final Reference ref = (Reference) refObj;
    final String className = ref.getClassName();


    if (className != null && className.equals(DATASOURCE_CLASS_NAME)) {


      P6DataSource dataSource;
      try {
        dataSource = (P6DataSource) Class.forName(className).newInstance();
      } catch (Exception ex) {
        throw new RuntimeException("Unable to create DataSource of " +
            "class '" + className + "': " + ex.toString());
      }
      // name of the real datasource
      dataSource.setRealDataSource((String) ref.get("dataSourceName").getContent());


      return dataSource;
    } else {
      // Who's class is this anyway, I ask ya!
      return null;

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  /**
   * Required method to support this class as a <CODE>Referenceable</CODE>.
   */
  @Override
  public Reference getReference() throws NamingException {
    final Reference reference = new Reference(getClass().getName(), P6DataSourceFactory.class.getName(), null);
    reference.add(new StringRefAddr("dataSourceName", getRealDataSource()));
    return reference;
  }

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      String jndiName = this.getJndiName();
//      Name name = ctx.getNameParser("").parse(jndiName);
      //ctx = Util.createSubcontext(ctx, name.getPrefix(name.size() - 1));
      //String atom = name.get(name.size() - 1);
      RefAddr refAddr = new StringRefAddr(JndiSessionProxyObjectFactory.REF_ADDR_NAME_JNDI_BINDING_DELEGATE_PROXY_FACTORY, jndiName + PROXY_FACTORY_NAME);
      Reference ref = new Reference(Object.class.getName(), refAddr, JndiSessionProxyObjectFactory.class.getName(), null);
//      try
//      {
//         log.debug("Binding reference for " + getContainer().getEjbName() + " in JNDI at " + jndiName);
//         Util.rebind(ctx, atom, ref);
//      }

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