JMSSink xref

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    1   /*
    2    * Licensed to the Apache Software Foundation (ASF) under one or more
    3    * contributor license agreements.  See the NOTICE file distributed with
    4    * this work for additional information regarding copyright ownership.
    5    * The ASF licenses this file to You under the Apache License, Version 2.0
    6    * (the "License"); you may not use this file except in compliance with
    7    * the License.  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.apache.log4j.net;
    19
    20  import org.apache.log4j.Logger;
    21  import org.apache.log4j.PropertyConfigurator;
    22  import org.apache.log4j.spi.LoggingEvent;
    23  import org.apache.log4j.xml.DOMConfigurator;
    24
    25  import javax.jms.JMSException;
    26  import javax.jms.ObjectMessage;
    27  import javax.jms.Session;
    28  import javax.jms.Topic;
    29  import javax.jms.TopicConnection;
    30  import javax.jms.TopicConnectionFactory;
    31  import javax.jms.TopicSession;
    32  import javax.jms.TopicSubscriber;
    33  import javax.naming.Context;
    34  import javax.naming.InitialContext;
    35  import javax.naming.NameNotFoundException;
    36  import javax.naming.NamingException;
    37  import java.io.BufferedReader;
    38  import java.io.InputStreamReader;
    39
    40  /**
    41   * A simple application that consumes logging events sent by a {@link
    42   * JMSAppender}.
    43   *
    44   *
    45   * @author Ceki G&uuml;lc&uuml;
    46   * */
    47  public class JMSSink implements javax.jms.MessageListener {
    48
    49    static Logger logger = Logger.getLogger(JMSSink.class);
    50
    51    static public void main(String[] args) throws Exception {
    52      if(args.length != 5) {
    53        usage("Wrong number of arguments.");
    54      }
    55
    56      String tcfBindingName = args[0];
    57      String topicBindingName = args[1];
    58      String username = args[2];
    59      String password = args[3];
    60
    61
    62      String configFile = args[4];
    63
    64      if(configFile.endsWith(".xml")) {
    65        DOMConfigurator.configure(configFile);
    66      } else {
    67        PropertyConfigurator.configure(configFile);
    68      }
    69
    70      new JMSSink(tcfBindingName, topicBindingName, username, password);
    71
    72      BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
    73      // Loop until the word "exit" is typed
    74      System.out.println("Type \"exit\" to quit JMSSink.");
    75      while(true){
    76        String s = stdin.readLine( );
    77        if (s.equalsIgnoreCase("exit")) {
    78  	System.out.println("Exiting. Kill the application if it does not exit "
    79  			   + "due to daemon threads.");
    80  	return;
    81        }
    82      }
    83    }
    84
    85    public JMSSink( String tcfBindingName, String topicBindingName, String username,
    86  		  String password) {
    87
    88      try {
    89        Context ctx = new InitialContext();
    90        TopicConnectionFactory topicConnectionFactory;
    91        topicConnectionFactory = (TopicConnectionFactory) lookup(ctx,
    92                                                                 tcfBindingName);
    93
    94        TopicConnection topicConnection =
    95  	                        topicConnectionFactory.createTopicConnection(username,
    96  									     password);
    97        topicConnection.start();
    98
    99        TopicSession topicSession = topicConnection.createTopicSession(false,
    100                                                        Session.AUTO_ACKNOWLEDGE);
    101
    102       Topic topic = (Topic)ctx.lookup(topicBindingName);
    103
    104       TopicSubscriber topicSubscriber = topicSession.createSubscriber(topic);
    105
    106       topicSubscriber.setMessageListener(this);
    107
    108     } catch(JMSException e) {
    109       logger.error("Could not read JMS message.", e);
    110     } catch(NamingException e) {
    111       logger.error("Could not read JMS message.", e);
    112     } catch(RuntimeException e) {
    113       logger.error("Could not read JMS message.", e);
    114     }
    115   }
    116
    117   public void onMessage(javax.jms.Message message) {
    118     LoggingEvent event;
    119     Logger remoteLogger;
    120
    121     try {
    122       if(message instanceof  ObjectMessage) {
    123 	ObjectMessage objectMessage = (ObjectMessage) message;
    124 	event = (LoggingEvent) objectMessage.getObject();
    125 	remoteLogger = Logger.getLogger(event.getLoggerName());
    126 	remoteLogger.callAppenders(event);
    127       } else {
    128 	logger.warn("Received message is of type "+message.getJMSType()
    129 		    +", was expecting ObjectMessage.");
    130       }
    131     } catch(JMSException jmse) {
    132       logger.error("Exception thrown while processing incoming message.",
    133 		   jmse);
    134     }
    135   }
    136
    137
    138   protected static Object lookup(Context ctx, String name) throws NamingException {
    139     try {
    140       return ctx.lookup(name);
    141     } catch(NameNotFoundException e) {
    142       logger.error("Could not find name ["+name+"].");
    143       throw e;
    144     }
    145   }
    146
    147   static void usage(String msg) {
    148     System.err.println(msg);
    149     System.err.println("Usage: java " + JMSSink.class.getName()
    150             + " TopicConnectionFactoryBindingName TopicBindingName username password configFile");
    151     System.exit(1);
    152   }
    153 }