001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache license, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the license for the specific language governing permissions and 015 * limitations under the license. 016 */ 017 package org.apache.logging.log4j.core.net; 018 019 import javax.jms.JMSException; 020 import javax.jms.Session; 021 import javax.jms.Topic; 022 import javax.jms.TopicConnection; 023 import javax.jms.TopicConnectionFactory; 024 import javax.jms.TopicSession; 025 import javax.jms.TopicSubscriber; 026 import javax.naming.Context; 027 import javax.naming.InitialContext; 028 import javax.naming.NamingException; 029 import java.io.BufferedReader; 030 import java.io.InputStreamReader; 031 import java.nio.charset.Charset; 032 033 /** 034 * Receives Topic messages that contain LogEvents. This implementation expects that all messages 035 * are serialized log events. 036 */ 037 public class JMSTopicReceiver extends AbstractJMSReceiver { 038 039 /** 040 * Constructor. 041 * @param tcfBindingName The TopicConnectionFactory binding name. 042 * @param topicBindingName The Topic binding name. 043 * @param username The userid to connect to the topic. 044 * @param password The password to connect to the topic. 045 */ 046 public JMSTopicReceiver(final String tcfBindingName, final String topicBindingName, final String username, 047 final String password) { 048 try { 049 final Context ctx = new InitialContext(); 050 TopicConnectionFactory topicConnectionFactory; 051 topicConnectionFactory = (TopicConnectionFactory) lookup(ctx, tcfBindingName); 052 final TopicConnection topicConnection = topicConnectionFactory.createTopicConnection(username, password); 053 topicConnection.start(); 054 final TopicSession topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE); 055 final Topic topic = (Topic) ctx.lookup(topicBindingName); 056 final TopicSubscriber topicSubscriber = topicSession.createSubscriber(topic); 057 topicSubscriber.setMessageListener(this); 058 } catch (final JMSException e) { 059 logger.error("Could not read JMS message.", e); 060 } catch (final NamingException e) { 061 logger.error("Could not read JMS message.", e); 062 } catch (final RuntimeException e) { 063 logger.error("Could not read JMS message.", e); 064 } 065 } 066 067 /** 068 * Main startup for the receiver. 069 * @param args The command line arguments. 070 * @throws Exception if an error occurs. 071 */ 072 public static void main(final String[] args) throws Exception { 073 if (args.length != 4) { 074 usage("Wrong number of arguments."); 075 } 076 077 final String tcfBindingName = args[0]; 078 final String topicBindingName = args[1]; 079 final String username = args[2]; 080 final String password = args[3]; 081 082 new JMSTopicReceiver(tcfBindingName, topicBindingName, username, password); 083 084 final Charset enc = Charset.defaultCharset(); 085 final BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in, enc)); 086 // Loop until the word "exit" is typed 087 System.out.println("Type \"exit\" to quit JMSTopicReceiver."); 088 while (true) { 089 final String s = stdin.readLine(); 090 if (s.equalsIgnoreCase("exit")) { 091 System.out.println("Exiting. Kill the application if it does not exit " 092 + "due to daemon threads."); 093 return; 094 } 095 } 096 } 097 098 private static void usage(final String msg) { 099 System.err.println(msg); 100 System.err.println("Usage: java " + JMSTopicReceiver.class.getName() 101 + " TopicConnectionFactoryBindingName TopicBindingName username password"); 102 System.exit(1); 103 } 104 }