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

   public String toString() {
      return this.topicName;
   }


   public Reference getReference() {
      Reference ret = new Reference(this.getClass().getName(), XBObjectFactory.class.getName(), null);
      ret.add(new StringRefAddr("topicName", this.topicName));
      ret.add(new StringRefAddr("queueName", this.queueName));
      ret.add(new StringRefAddr("forceQueuing", "" + this.forceQueuing));
      return ret;
   }

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   // Referenceable implementation ---------------------------------------
   
   public Reference getReference() throws NamingException
   {
      return new Reference("org.jboss.jms.destination.JBossDestination",
                           new SerializableObjectRefAddr("JBM-DEST", this),
                           "org.jboss.jms.referenceable.DestinationObjectFactory",
                           null);
   }

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     *         to be tried.
     */
    public Object getObjectInstance(final Object obj, final Name name, final Context nameCtx, final Hashtable<?, ?> environment)
            throws Exception {


        Reference ref = (Reference) obj;


        String dsname = (String) ref.get("datasource.name").getContent();
        ConnectionManager ds = ConnectionManager.getConnectionManager(dsname);
        if (ds == null) {
            // The DataSource was not in the EasyBeans Server: Create it.
            logger.debug("Creating a new Connection Manager for {0}", dsname);
            try {
                // build a new datasource for another server
                ds = new ConnectionManager();
                ds.setDSName(dsname);
                ds.setUrl((String) ref.get("datasource.url").getContent());
                ds.setClassName((String) ref.get("datasource.classname").getContent());
                ds.setUserName((String) ref.get("datasource.username").getContent());
                ds.setPassword((String) ref.get("datasource.password").getContent());
                ds.setTransactionIsolation((String) ref.get("datasource.isolationlevel").getContent());
                ds.poolConfigure((String) ref.get("connchecklevel").getContent(),
                        (String) ref.get("connmaxage").getContent(), (String) ref.get("maxopentime").getContent(),
                        (String) ref.get("connteststmt").getContent(), (String) ref.get("pstmtmax").getContent(),
                        (String) ref.get("minconpool").getContent(), (String) ref.get("maxconpool").getContent(),
                        (String) ref.get("maxwaittime").getContent(), (String) ref.get("maxwaiters").getContent(),
                        (String) ref.get("samplingperiod").getContent());
            } catch (Exception e) {
                logger.error("DataSourceFactory error", e);
            }
        }
        return ds;

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   // Referenceable implementation -----------------------------------------------------------------
   
   public Reference getReference() throws NamingException
   {
      return new Reference("org.jboss.jms.client.JBossConnectionFactory",
               new SerializableObjectRefAddr("JBM-CF", this),
               "org.jboss.jms.referenceable.ConnectionFactoryObjectFactory",
               null);
   }

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     * @param encName the name of the object to bind in enc
     * @param url the URL to register in the context
     */
    public static void bindLinkRefEnvURL(final String encName, final String url) {
        // Specify the factory to use with the right URL
        Reference ref = new Reference(URL.class.getName(), URLFactory.class.getName(), null);
        StringRefAddr refAddr = new StringRefAddr("url", url);
        ref.add(refAddr);
        try {
            getContext(JAVA_COMP_ENV).rebind(encName, ref);
        } catch (NamingException e) {
            logger.error("Cannot bind an URL with name {0} with ENC name {1}", url, encName, e);
        }

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            logger.error("No object was found for JNDI name {0}", name);
        }


        // Display some meaningful information if the Reference was not processed
        if (o instanceof Reference) {
            Reference ref = (Reference) o;
            logger.warn("Reference not processed: " + ref);
            logger.warn("LookupError({0}): The ObjectFactory({1}) was not found with TCCL {2}",
                        name,
                        ref.getFactoryClassName(),
                        Thread.currentThread().getContextClassLoader());
        }
        return o;
    }

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     * @exception NamingException If a naming exception was encountered while
     *            retrieving the reference.
     */
    public Reference getReference() throws NamingException {


        Reference ref = new Reference(this.getClass().getName(), DataSourceFactory.class.getName(), null);
        // These values are used by ObjectFactory (see DataSourceFactory.java)
        ref.add(new StringRefAddr("datasource.name", getDSName()));
        ref.add(new StringRefAddr("datasource.url", getUrl()));
        ref.add(new StringRefAddr("datasource.classname", getClassName()));
        ref.add(new StringRefAddr("datasource.username", getUserName()));
        ref.add(new StringRefAddr("datasource.password", getPassword()));
        ref.add(new StringRefAddr("datasource.isolationlevel", getTransactionIsolation()));
        Integer checklevel = Integer.valueOf(getCheckLevel());
        ref.add(new StringRefAddr("connchecklevel", checklevel.toString()));
        Integer maxage = Integer.valueOf(getMaxAge());
        ref.add(new StringRefAddr("connmaxage", maxage.toString()));
        Integer maxopentime = Integer.valueOf(getMaxOpenTime());
        ref.add(new StringRefAddr("maxopentime", maxopentime.toString()));
        ref.add(new StringRefAddr("connteststmt", getTestStatement()));
        Integer pstmtmax = Integer.valueOf(getPstmtMax());
        ref.add(new StringRefAddr("pstmtmax", pstmtmax.toString()));
        Integer minpool = Integer.valueOf(getPoolMin());
        ref.add(new StringRefAddr("minconpool", minpool.toString()));
        Integer maxpool = Integer.valueOf(getPoolMax());
        ref.add(new StringRefAddr("maxconpool", maxpool.toString()));
        Integer maxwaittime = Integer.valueOf(getMaxWaitTime());
        ref.add(new StringRefAddr("maxwaittime", maxwaittime.toString()));
        Integer maxwaiters = Integer.valueOf(getMaxWaiters());
        ref.add(new StringRefAddr("maxwaiters", maxwaiters.toString()));
        Integer samplingperiod = Integer.valueOf(getSamplingPeriod());
        ref.add(new StringRefAddr("samplingperiod", samplingperiod.toString()));
        return ref;
    }

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     *         to be tried.
     */
    public Object getObjectInstance(final Object obj, final Name name, final Context nameCtx, final Hashtable<?, ?> environment)
            throws Exception {
        if (obj instanceof Reference) {
            Reference ref = (Reference) obj;


            // get the embeddedID, getContainerId(), getFactoryName()
            RefAddr containerIDAddr = ref.get(AbsCallRef.CONTAINER_ID);
            RefAddr factoryNameAddr = ref.get(AbsCallRef.FACTORY_NAME);
            RefAddr itfClassNameAddr = ref.get(AbsCallRef.INTERFACE_NAME);
            RefAddr useIDAddr = ref.get(AbsCallRef.USE_ID);


            String containerID = (String) containerIDAddr.getContent();
            String factoryName = (String) factoryNameAddr.getContent();
            String itfClassName = (String) itfClassNameAddr.getContent();
            boolean useID = Boolean.valueOf((String) useIDAddr.getContent()).booleanValue();

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     */
    @Override
    public Object getObjectInstance(final Object obj, final Name name, final Context nameCtx, final Hashtable<?, ?> environment)
            throws Exception {
        if (obj instanceof Reference) {
            Reference ref = (Reference) obj;


            // get the properties
            RefAddr remoteInterfaceAddr = ref.get(EJBHomeCallRef.REMOTE_INTERFACE);
            this.remoteInterface =  (String) remoteInterfaceAddr.getContent();
        }


        // Now call the super method.
        return super.getObjectInstance(obj, name, nameCtx, environment);

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     *         to be tried.
     */
    public Object getObjectInstance(final Object obj, final Name name, final Context nameCtx, final Hashtable<?, ?> environment)
            throws Exception {
        if (obj instanceof Reference) {
            Reference ref = (Reference) obj;


            // get the embeddedID, getContainerId(), getFactoryName()
            RefAddr embeddedIDAddr = ref.get(LocalCallRef.EMBEDDED_ID);
            RefAddr containerIDAddr = ref.get(AbsCallRef.CONTAINER_ID);
            RefAddr factoryNameAddr = ref.get(AbsCallRef.FACTORY_NAME);
            RefAddr itfClassNameAddr = ref.get(AbsCallRef.INTERFACE_NAME);
            RefAddr useIDAddr = ref.get(AbsCallRef.USE_ID);


            Integer embeddedID = Integer.valueOf((String) embeddedIDAddr.getContent());
            String containerID = (String) containerIDAddr.getContent();
            String factoryName = (String) factoryNameAddr.getContent();
            String itfClassName = (String) itfClassNameAddr.getContent();

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