babeldoc-devel

[<tr...@us...>]

Update of /cvsroot/babeldoc/babeldoc/modules/j2ee/src/com/babeldoc/j2ee/pipeline
In directory sc8-pr-cvs1:/tmp/cvs-serv31076/src/com/babeldoc/j2ee/pipeline

Added Files:
	EjbMessageFeederBean.java 
Log Message:
More work on the j2ee module - added message driven bean - missing configuration files.  jms helper functions moved to new class.

--- NEW FILE: EjbMessageFeederBean.java ---
/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact ap...@ap....
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * Portions of this software are based upon public domain software
 * originally written at the National Center for Supercomputing Applications,
 * University of Illinois, Urbana-Champaign.
 * ====================================================================
 *
 * Babeldoc:  The Universal Document Processor
 *
 * $Header: /cvsroot/babeldoc/babeldoc/modules/j2ee/src/com/babeldoc/j2ee/pipeline/EjbMessageFeederBean.java,v 1.1 2003/09/17 17:07:15 triphop Exp $
 * $DateTime$
 * $Author: triphop $
 *
 */
package com.babeldoc.j2ee.pipeline;

import com.babeldoc.core.pipeline.feeder.IFeeder;
import com.babeldoc.core.pipeline.feeder.FeederFactory;
import com.babeldoc.core.config.ConfigService;
import com.babeldoc.core.GeneralException;
import com.babeldoc.core.LogService;
import com.babeldoc.core.option.IConfigData;
import com.babeldoc.core.option.ConfigData;
import com.babeldoc.j2ee.JmsHelper;

import javax.ejb.MessageDrivenBean;
import javax.ejb.EJBException;
import javax.ejb.MessageDrivenContext;
import javax.jms.MessageListener;
import javax.jms.Message;
import javax.jms.JMSException;

/**
 * Simple message driven bean that submits pipeline documents.  The processing of the
 * jms message are done in the jms helper class.
 *
 * @author bmcdonald
 * @version 1.1
 *
 * @ejb.bean
 *     name="QueueBean"
 *     acknowledge-mode="Auto-acknowledge"
 *     destination-type="javax.jms.Queue"
 *     subscription-durability="NonDurable"
 *     transaction-type="Bean"
 *
 * @jboss.destination-jndi-name
 *     name="queue/pipelineQueue"
 */
public class EjbMessageFeederBean
    implements MessageDrivenBean, MessageListener{
  /** context data */
  private MessageDrivenContext context = null;

  /** feeder to accept messages */
  private IFeeder feeder;

  /** name of the pipeline */
  private String pipeline;

  /** configuration file */
  public static final String CONFIG_FILE = "j2ee/messagedriven";

  /** name of the feeder configuration option */
  public static final String FEEDER = "feeder";

  /** the default feeder to use if none is supplied */
  public static final String DEFAULT_FEEDER = "sync";

  /** the pipeline name to submit documents to */
  public static final String PIPELINE = "pipeline";

  /**
   * Required creation method for message-driven beans.
   *
   * @ejb.create-method
   */
  public void ejbCreate() {
      // no specific action required for message-driven beans
  }

  /**
   * remove this ejb
   *
   * @throws EJBException
   */
  public void ejbRemove() throws EJBException {
  }

  /**
   * Set the message driven context
   *
   * @param messageDrivenContext
   * @throws EJBException
   */
  public void setMessageDrivenContext(MessageDrivenContext messageDrivenContext)
      throws EJBException {
    context = messageDrivenContext;
  }

  /**
   * Get the feeder for this MDB.  If there is no feeder, get a reference to one
   * and then initialize it from the configuration
   *
   * @return feeder ready for use
   * @throws GeneralException
   */
  public IFeeder getFeeder() throws GeneralException {
    if(feeder==null) {
      String feederName = ConfigService.getString(CONFIG_FILE, FEEDER);
      if(feederName==null) {
        feederName = DEFAULT_FEEDER;
      }
      feeder = FeederFactory.getInstance().getFeeder(feederName);
      if(feeder!=null) {
        feeder.initialize(getConfigData());
      }
    }
    return feeder;
  }

  /**
   * Get the configuration data
   *
   * @return
   */
  private IConfigData getConfigData() {
    return ConfigData.getConfigData("root", CONFIG_FILE);
  }

  /**
   * Get the pipeline name.  Lazily initialize from the configuration
   * file
   *
   * @return
   */
  public String getPipeline() {
    if(pipeline==null) {
      pipeline = ConfigService.getString(CONFIG_FILE, PIPELINE);
    }
    return pipeline;
  }

  /**
   * Actually do the processing in response to the reception of a JMS message
   *
   * @param message to process
   */
  public void onMessage(Message message) {
    try {
      getFeeder().process(JmsHelper.getFeedDocument(getPipeline(), message));
    } catch (GeneralException e) {
      LogService.getInstance().logError(e);
    } catch (JMSException e) {
      LogService.getInstance().logError(e);
    }
  }

  /**
   * @return get the assigned context
   */
  public MessageDrivenContext getContext() {
    return context;
  }
}