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

This example Java EE 6 source code file (JavaMailConnectionImpl.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

connectionmetadataimpl, exception, in, in, javamailconnectionimpl, javamailconnectionimpl, log, logger, logging, managedconnectionimpl, managedconnectionimpl, managedconnectionimpl::getnewmessageheaders, no_transaction, resourceexception, resourceexception, string, util

The Java EE 6 JavaMailConnectionImpl.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.outbound;

import javax.resource.cci.*;
import javax.resource.ResourceException;
import javax.resource.NotSupportedException;
import javax.resource.spi.ConnectionEvent;
import java.util.*;
import java.util.logging.*;
import javax.mail.*;

import samples.connectors.mailconnector.api.*;
import samples.connectors.mailconnector.share.*;


/**
 * Application-level connection handle that is used by a 
 * client component to access an EIS instance.
 */

public class JavaMailConnectionImpl implements JavaMailConnection
{

    private ManagedConnectionImpl mc; // if mc is null, connection is invalid
    private javax.mail.Folder 		folder; // Folder 1x1 with connection

    static Logger logger = 
        Logger.getLogger("samples.connectors.mailconnector.ra.outbound",
            "samples.connectors.mailconnector.ra.outbound.LocalStrings");
    ResourceBundle resource = 
        java.util.ResourceBundle.getBundle("samples.connectors.mailconnector.ra.outbound.LocalStrings");

    /**
     * Constructor.
     *
     * @param mc  a physical connection to an underlying EIS
     * @param connectionInfo  connection-specific info/properties 
     * 
     */
  
    JavaMailConnectionImpl(ManagedConnectionImpl mc, 
                           javax.mail.Folder folder) 
    {
        this.mc = mc;
        this.folder = folder;
	logger.fine(" 5. JavaMailConnectionImpl::Constructor");
    }
  
    

    /**
     * Retrieves a ManagedConnection.
     *
     *	@return  a ManagedConnection instance representing the physical 
     *           connection to the EIS
     */

    public ManagedConnectionImpl getManagedConnection() 
    {
	logger.finest(" -- In JavaMailConnectionImpl::getManagedConnection mc=" + mc);
        return mc;
    }

    /**
     * Returns a javax.resource.cci.LocalTransaction instance that enables a 
     * component to demarcate resource manager local transactions on the 
     * Connection.
     *
     * Because this implementation does not support transactions, the method
     * throws an exception.
     *
     * @return  a LocalTransaction instance
     */
    public javax.resource.cci.LocalTransaction getLocalTransaction() 
	throws ResourceException
    {
        throw new ResourceException(resource.getString("NO_TRANSACTION"));
    }

    
    /**
     * Returns the metadata for the ManagedConnection.
     *
     * @return  a ConnectionMetaData instance
     */
    public ConnectionMetaData getMetaData() 
	throws ResourceException
    {
	logger.finest(" -- In JavaMailConnectionImpl:: getMetaData mc=" + mc);
        return new ConnectionMetaDataImpl(mc);
    }

    /**
     * Closes the connection.
     */
    public void close() 
	throws ResourceException
    {
 	logger.finest(" -- In JavaMailConnectionImpl:: close mc=" + mc);
        if (mc == null) 
	   return;  // connection is already closed
        mc.removeJavaMailConnection(this);

	// Send a close event to the App Server
        mc.sendEvent(ConnectionEvent.CONNECTION_CLOSED, null, this);
        mc = null;
    }

    /**
     * Associates connection handle with new managed connection.
     *
     * @param newMc  new managed connection
     */

    public void associateConnection(ManagedConnectionImpl newMc)
        throws ResourceException 
    {
        checkIfValid();
        // dissociate handle from current managed connection
        mc.removeJavaMailConnection(this);
        // associate handle with new managed connection
        newMc.addJavaMailConnection(this);
        mc = newMc;
    }

    /**
     * Checks the validity of the physical connection to the EIS.
     */

    void checkIfValid() 
	throws ResourceException 
    {
        logger.finest(" -- In JavaMailConnectionImpl::checkIfValid mc=" + mc);
        if (mc == null) 
	{
            throw new ResourceException(resource.getString("INVALID_CONNECTION"));
        }
    }

    /**
     * Sets the physical connection to the EIS as invalid.
     * The physical connection to the EIS cannot be used any more.
     */

    void invalidate() 
    {
	logger.fine(" -- In JavaMailConnectionImpl::invalidate mc=" + mc);
        mc = null;
    }

    /**
     * Application-specific method. Fetches new messages from the mail server.
     *
     * @return an array of messages
     */

    public javax.mail.Message[] getNewMessages()
      throws ResourceException
    {
        checkIfValid();
        try
	{
	    return mc.getNewMessages(folder);
	} catch (Exception e) {
      	    logger.warning("ManagedConnectionImpl::getNewMessages threw exception: " + e);
	    throw new ResourceException(e.getMessage());
        } 
    }

    /**
     * Application-specific method. Fetches new message headers from the 
     * mail server.
     *
     * @return a String array of message headers
     */
    public String[] getNewMessageHeaders()
      throws ResourceException
    {
        checkIfValid();
        try
	{
	    return mc.getNewMessageHeaders(folder);
	} catch (Exception e) {
      	    logger.warning("ManagedConnectionImpl::getNewMessageHeaders threw exception: " + e);
	    throw new ResourceException(e.getMessage());
        } 
    } 
}