StateServiceStub xref

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    1   /***
    2    *
    3    * Copyright 2004 Protique Ltd
    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.activecluster.impl;
    19
    20  import org.apache.commons.logging.Log;
    21  import org.apache.commons.logging.LogFactory;
    22  import org.codehaus.activecluster.Node;
    23
    24  import javax.jms.JMSException;
    25  import javax.jms.Message;
    26  import javax.jms.MessageProducer;
    27  import javax.jms.Session;
    28
    29
    30  /***
    31   * A local stub for the state service which sends JMS messages
    32   * to the cluster
    33   *
    34   * @version $Revision: 1.5 $
    35   */
    36  public class StateServiceStub implements StateService {
    37
    38      private final Log log = LogFactory.getLog(getClass());
    39
    40      private Session session;
    41      private MessageProducer producer;
    42
    43      public StateServiceStub(Session session, MessageProducer producer) {
    44          this.session = session;
    45          this.producer = producer;
    46      }
    47
    48      public void keepAlive(Node node) {
    49          try {
    50              if (log.isDebugEnabled()) {
    51                  log.debug("Sending cluster data message: " + node);
    52              }
    53
    54              Message message = session.createObjectMessage(new NodeImpl(node));
    55              producer.send(message);
    56          }
    57          catch (JMSException e) {
    58              log.error("Could not send JMS message: " + e, e);
    59          }
    60      }
    61
    62      public void shutdown(Node node) {
    63          try {
    64              if (log.isDebugEnabled()) {
    65                  log.debug("Sending shutdown message: " + node);
    66              }
    67
    68              Message message = session.createObjectMessage(new NodeImpl(node));
    69              message.setJMSType("shutdown");
    70              producer.send(message);
    71          }
    72          catch (JMSException e) {
    73              log.error("Could not send JMS message: " + e, e);
    74          }
    75      }
    76  }