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; 031 032 /** 033 * Receives Topic messages that contain LogEvents. This implementation expects that all messages 034 * are serialized log events. 035 */ 036 public class JMSTopicReceiver extends AbstractJMSReceiver { 037 038 /** 039 * Constructor. 040 * @param tcfBindingName The TopicConnectionFactory binding name. 041 * @param topicBindingName The Topic binding name. 042 * @param username The userid to connect to the topic. 043 * @param password The password to connect to the topic. 044 */ 045 public JMSTopicReceiver(String tcfBindingName, String topicBindingName, String username, String password) { 046 try { 047 Context ctx = new InitialContext(); 048 TopicConnectionFactory topicConnectionFactory; 049 topicConnectionFactory = (TopicConnectionFactory) lookup(ctx, tcfBindingName); 050 TopicConnection topicConnection = topicConnectionFactory.createTopicConnection(username, password); 051 topicConnection.start(); 052 TopicSession topicSession = topicConnection.createTopicSession(false, Session.AUTO_ACKNOWLEDGE); 053 Topic topic = (Topic) ctx.lookup(topicBindingName); 054 TopicSubscriber topicSubscriber = topicSession.createSubscriber(topic); 055 topicSubscriber.setMessageListener(this); 056 } catch (JMSException e) { 057 logger.error("Could not read JMS message.", e); 058 } catch (NamingException e) { 059 logger.error("Could not read JMS message.", e); 060 } catch (RuntimeException e) { 061 logger.error("Could not read JMS message.", e); 062 } 063 } 064 065 /** 066 * Main startup for the receiver. 067 * @param args The command line arguments. 068 * @throws Exception if an error occurs. 069 */ 070 public static void main(String[] args) throws Exception { 071 if (args.length != 4) { 072 usage("Wrong number of arguments."); 073 } 074 075 String tcfBindingName = args[0]; 076 String topicBindingName = args[1]; 077 String username = args[2]; 078 String password = args[3]; 079 080 new JMSTopicReceiver(tcfBindingName, topicBindingName, username, password); 081 082 BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in)); 083 // Loop until the word "exit" is typed 084 System.out.println("Type \"exit\" to quit JMSTopicReceiver."); 085 while (true) { 086 String s = stdin.readLine(); 087 if (s.equalsIgnoreCase("exit")) { 088 System.out.println("Exiting. Kill the application if it does not exit " 089 + "due to daemon threads."); 090 return; 091 } 092 } 093 } 094 095 private static void usage(String msg) { 096 System.err.println(msg); 097 System.err.println("Usage: java " + JMSTopicReceiver.class.getName() 098 + " TopicConnectionFactoryBindingName TopicBindingName username password"); 099 System.exit(1); 100 } 101 }