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Java EE 6 example source code file (ResourceAdapterImpl.java)

This example Java EE 6 source code file (ResourceAdapterImpl.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Java EE 6 tags/keywords

activationspec, endpointconsumer, entered, exception, log, logging, messageendpointfactory, method, method, naming, notsupportedexception, notsupportedexception, object, object, reflection, resourceadapterimpl, resourceadapterinternalexception, resourceadapterinternalexception, util

The Java EE 6 ResourceAdapterImpl.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 1997-2009 Sun Microsystems, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 *
 * Contributor(s):
 *
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package samples.connectors.mailconnector.ra;

import javax.resource.NotSupportedException;
import javax.resource.spi.*;
import javax.resource.spi.endpoint.*;
import javax.resource.spi.work.*;
import javax.resource.cci.*;
import javax.resource.*;

import javax.naming.*;
import javax.mail.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.logging.*;

import samples.connectors.mailconnector.api.*;
import samples.connectors.mailconnector.ra.outbound.*;
import samples.connectors.mailconnector.ra.inbound.*;

/**
 * JavaMail Resource Adapter
 *
 * @author Alejandro E. Murillo 
 */

@Connector(
        description = "Sample adapter using the JavaMail API",
        displayName = "InboundResourceAdapter",
        vendorName = "Sun Microsystems, Inc.",
        eisType = "MAIL",
        version = "1.0",
        authMechanisms = {
                @AuthenticationMechanism(
                    authMechanism = "BasicPassword",
                    credentialInterface = AuthenticationMechanism.CredentialInterface.PasswordCredential
                )
        }

/*
        // Since the following attribute values denote the default values of the annotation,
        // they need not be specified explicitly
        
        transactionSupport = TransactionSupport.TransactionSupportLevel.NoTransaction,
        reauthenticationSupport = false
*/
)

public class ResourceAdapterImpl
    implements ResourceAdapter, java.io.Serializable
{
    protected transient BootstrapContext    bootCtx;
    protected transient WorkManager         workManager;
    public transient    Context             jndiContext  = null;
    private             Work                pollingThread;
    
    public Method onMessage = null;    
    
    static Logger logger = 
        Logger.getLogger("samples.connectors.mailconnector.ra",
            "samples.connectors.mailconnector.ra.LocalStrings");
    ResourceBundle resource = 
        ResourceBundle.getBundle("samples.connectors.mailconnector.ra.LocalStrings");

    /** 
     *	Constructor.
     */

    public ResourceAdapterImpl () { }
    
    
    /** 
     * Called by the AppServer to initialize the Resource Adapter.
     *
     * @param ctx  the BootstrapContext
     */

    public void start(BootstrapContext ctx) 
        throws ResourceAdapterInternalException
    {
       /* Bootstrap context - used to acquire WorkManager, Timer, 
        * or XATerminator
        */
       
        this.bootCtx = ctx;     
               
        try
	{
            // Get the initial JNDI Context
            this.jndiContext = new InitialContext();
            
            // Get Work Manager
            this.workManager = ctx.getWorkManager();
        } catch(Exception ex) {
            logger.severe(resource.getString("resourceadapterimpl.noservice"));
            ex.printStackTrace();
            throw new ResourceAdapterInternalException(
                resource.getString("resourceadapterimpl.noservice"));
       	}  
        
        setOnMessageMethod();
        
        /* Start the polling thread */
         
        try
        {
            pollingThread     = new PollingThread(workManager);
            workManager.scheduleWork(pollingThread);
        } catch (WorkRejectedException ex) {
            ResourceAdapterInternalException newEx =  new ResourceAdapterInternalException(
                java.text.MessageFormat.format(
		    resource.getString(
		        "resourceadapterimpl.worker_activation_rejected"), 
                        new Object[] { ex.getMessage() }));
            newEx.initCause(ex);
            throw newEx;
        } catch (Exception ex) {
            ResourceAdapterInternalException newEx =  new ResourceAdapterInternalException(
                java.text.MessageFormat.format(
		    resource.getString(
		        "resourceadapterimpl.worker_activation_failed"), 
                        new Object[] { ex.getMessage() }));
            
            newEx.initCause(ex);
            throw newEx;
        }	
    }

    /**
     * Sets the method for the onMessage method used in MessageListener. 
     */
    
    private void setOnMessageMethod() 
    {
        Method onMessageMethod = null;
	
        try 
	{
            Class msgListenerClass = samples.connectors.mailconnector.api.JavaMailMessageListener.class;
            Class[] paramTypes 	   = { javax.mail.Message.class };
            onMessageMethod 	   = msgListenerClass.getMethod("onMessage", paramTypes);
        } catch (NoSuchMethodException ex) {
            ex.printStackTrace();
        }
        
        onMessage = onMessageMethod;
    }  
   
    /**
     * Gets the method used to deliver messages. 
     *
     * @return  the onMessage method
     */

    public Method getOnMessageMethod()
    {
    	return onMessage;
    }

    
    /**
     * Called by the Application Server to indicate shutdown is imminent.
     * The Application Server should have undeployed all the message endpoints
     * prior to this call, but the JavaMail-RA will iterate through them and 
     * ensure that all the message endpoints are no longer consuming messages.
     */

    public void stop() 
    {    
        logger.info("[RA.stop()] Stopping the polling thread");
	try
	{
	    ((PollingThread)pollingThread).stopPolling();
        } catch(Exception ex) {
            logger.severe(resource.getString("resourceadapterimpl.noservice" ));
       	}  
    }
    
    /**  
     * Called by the Application Server when a message-driven bean
     * (MessageEndpoint) is deployed. Causes the resource adapter instance 
     * to do the necessary setup (setting up message delivery for the message 
     * endpoint with a message provider).
     *
     * @param endpointFactory  a message endpoint factory instance
     * @param spec  an ActivationSpec instance
     *
     * @exception NotSupportedException  if message endpoint activation is 
     *                                   rejected because of incorrect 
     *                                   activation setup information
     */

    public void endpointActivation (MessageEndpointFactory endpointFactory,
            			    ActivationSpec spec)
        throws NotSupportedException
    {            			                            
        logger.finest("[RA.endpointActivation()] Entered");

        try
        {
            EndpointConsumer ec = 
                new EndpointConsumer(endpointFactory,
                                         (ActivationSpecImpl) spec);
            ((PollingThread)pollingThread).addEndpointConsumer(endpointFactory, ec);
        } catch (Exception ex) {
            logger.finest("[RA.endpointActivation()] An Exception was caught while activating the endpoint");
            logger.finest("[RA.endpointActivation()] Please check the server logs for details");
            NotSupportedException newEx =  new NotSupportedException(
                java.text.MessageFormat.format(
		    resource.getString(
		        "resourceadapterimpl.endpoint_activation_fail"), 
                        new Object[] { ex.getMessage() }));
            newEx.initCause(ex);
            //throw newEx; // UNCOMMENT THIS LINE TO LET THE SERVER KNOW an error happened
			   // Has been commented out to avoid deployment failures during QA testing
			   // As a real user/password is required on ejb-jar.xml
        }	
    }
    
    /** 
     * Called by Application Server when the MessageEndpoint
     * (message-driven bean) is undeployed. The instance passed as arguments 
     * to this method call should be identical to that passed in for the 
     * corresponding endpointActivation call. This causes the resource adapter 
     * to stop delivering messages to the message endpoint.
     *
     * @param endpointFactory   a message endpoint factory instance
     * @param spec  an activation spec instance
     */

    public void endpointDeactivation (MessageEndpointFactory endpointFactory, 
            			      ActivationSpec spec)
    {
        logger.finest("[RA.endpointdeactivation()] Entered");

	((PollingThread)pollingThread).removeEndpointConsumer(endpointFactory);
         
    }
    
    /**
     * This method is called by the Application Server on the restart of the
     * Application Server when there are potential pending transactions.
     * For example, it may be called after a server crash.
     * The Application Server requests the XA Resources that correspond to the
     * Activation Specs for the endpoints that it is restarting. It may use 
     * those XA Resources to determine transaction status and attempt to commit
     * or rollback.
     *
     * Because this implementation does not support transactions, this method
     * does nothing.
     *
     * @param specs  an array of ActivationSpec objects
     *
     * @return  an XAResource
     */
    
    public javax.transaction.xa.XAResource[] getXAResources(ActivationSpec[] specs)
                                                 throws ResourceException
    {
        /*
         * Do nothing
         */
        
        return null;
    }

    
}

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