ActiveMQBaseEndpointWorker xref

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    1   /***
    2   *
    3   * Copyright 2004 Hiram Chirino
    4   *
    5   * Licensed under the Apache License, Version 2.0 (the "License");
    6   * you may not use this file except in compliance with the License.
    7   * You may obtain a copy of the License at
    8   *
    9   * http://www.apache.org/licenses/LICENSE-2.0
    10  *
    11  * Unless required by applicable law or agreed to in writing, software
    12  * distributed under the License is distributed on an "AS IS" BASIS,
    13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  * See the License for the specific language governing permissions and
    15  * limitations under the License.
    16  *
    17  **/
    18  package org.codehaus.activemq.ra;
    19
    20  import java.lang.reflect.Method;
    21
    22  import javax.jms.ConnectionConsumer;
    23  import javax.jms.JMSException;
    24  import javax.jms.Message;
    25  import javax.jms.MessageListener;
    26  import javax.jms.Session;
    27  import javax.resource.ResourceException;
    28  import javax.resource.spi.endpoint.MessageEndpointFactory;
    29  import javax.resource.spi.work.WorkException;
    30  import javax.resource.spi.work.WorkManager;
    31
    32  import org.apache.commons.logging.Log;
    33  import org.apache.commons.logging.LogFactory;
    34
    35  /***
    36   * @version $Revision: 1.2 $ $Date: 2004/07/30 01:52:52 $
    37   */
    38  public abstract class ActiveMQBaseEndpointWorker {
    39
    40      private static final Log log = LogFactory.getLog(ActiveMQBaseEndpointWorker.class);
    41  	public static final Method ON_MESSAGE_METHOD;
    42
    43      static {
    44          try {
    45              ON_MESSAGE_METHOD = MessageListener.class.getMethod("onMessage", new Class[]{Message.class});
    46          } catch (Exception e) {
    47              throw new ExceptionInInitializerError(e);
    48          }
    49      }
    50
    51  	protected ActiveMQResourceAdapter adapter;
    52  	protected ActiveMQEndpointActivationKey endpointActivationKey;
    53  	protected MessageEndpointFactory endpointFactory;
    54  	protected WorkManager workManager;
    55  	protected boolean transacted;
    56
    57  	/***
    58  	 * @param s
    59  	 */
    60  	public static void safeClose(Session s) {
    61  	    try {
    62  	        if (s != null) {
    63  	            s.close();
    64  	        }
    65  	    } catch (JMSException e) {
    66  	    }
    67  	}
    68
    69  	/***
    70  	 * @param cc
    71  	 */
    72  	public static void safeClose(ConnectionConsumer cc) {
    73  	    try {
    74  	        if (cc != null) {
    75  	            cc.close();
    76  	        }
    77  	    } catch (JMSException e) {
    78  	    }
    79  	}
    80
    81  	public ActiveMQBaseEndpointWorker(ActiveMQResourceAdapter adapter, ActiveMQEndpointActivationKey key) throws ResourceException {
    82          this.endpointActivationKey = key;
    83          this.adapter = adapter;
    84          this.endpointFactory = endpointActivationKey.getMessageEndpointFactory();
    85          this.workManager = adapter.getBootstrapContext().getWorkManager();
    86          try {
    87  			this.transacted = endpointFactory.isDeliveryTransacted(ON_MESSAGE_METHOD);
    88  		} catch (NoSuchMethodException e) {
    89  			throw new ResourceException("Endpoint does not implement the onMessage method.");
    90  		}
    91      }
    92
    93  	public abstract void start() throws WorkException, ResourceException;
    94
    95  	public abstract void stop() throws InterruptedException;
    96
    97
    98  }