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.jms; 018 019 import java.io.BufferedReader; 020 import java.io.InputStreamReader; 021 import java.nio.charset.Charset; 022 023 import javax.jms.JMSException; 024 import javax.jms.Queue; 025 import javax.jms.QueueConnection; 026 import javax.jms.QueueConnectionFactory; 027 import javax.jms.QueueReceiver; 028 import javax.jms.QueueSession; 029 import javax.jms.Session; 030 import javax.naming.Context; 031 import javax.naming.InitialContext; 032 import javax.naming.NamingException; 033 034 /** 035 * Receives Log Events over a JMS Queue. This implementation expects that all messages will 036 * contain a serialized LogEvent. 037 */ 038 public class JmsQueueReceiver extends AbstractJmsReceiver { 039 040 /** 041 * Constructor. 042 * @param qcfBindingName The QueueConnectionFactory binding name. 043 * @param queueBindingName The Queue binding name. 044 * @param username The userid to connect to the queue. 045 * @param password The password to connect to the queue. 046 */ 047 public JmsQueueReceiver(final String qcfBindingName, final String queueBindingName, final String username, 048 final String password) { 049 050 try { 051 final Context ctx = new InitialContext(); 052 QueueConnectionFactory queueConnectionFactory; 053 queueConnectionFactory = (QueueConnectionFactory) lookup(ctx, qcfBindingName); 054 final QueueConnection queueConnection = queueConnectionFactory.createQueueConnection(username, password); 055 queueConnection.start(); 056 final QueueSession queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE); 057 final Queue queue = (Queue) ctx.lookup(queueBindingName); 058 final QueueReceiver queueReceiver = queueSession.createReceiver(queue); 059 queueReceiver.setMessageListener(this); 060 } catch (final JMSException e) { 061 logger.error("Could not read JMS message.", e); 062 } catch (final NamingException e) { 063 logger.error("Could not read JMS message.", e); 064 } catch (final RuntimeException e) { 065 logger.error("Could not read JMS message.", e); 066 } 067 } 068 069 /** 070 * Main startup for the receiver. 071 * @param args The command line arguments. 072 * @throws Exception if an error occurs. 073 */ 074 public static void main(final String[] args) throws Exception { 075 if (args.length != 4) { 076 usage("Wrong number of arguments."); 077 } 078 079 final String qcfBindingName = args[0]; 080 final String queueBindingName = args[1]; 081 final String username = args[2]; 082 final String password = args[3]; 083 084 new JmsQueueReceiver(qcfBindingName, queueBindingName, username, password); 085 086 final Charset enc = Charset.defaultCharset(); 087 final BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in, enc)); 088 // Loop until the word "exit" is typed 089 System.out.println("Type \"exit\" to quit JmsQueueReceiver."); 090 while (true) { 091 final String line = stdin.readLine(); 092 if (line == null || line.equalsIgnoreCase("exit")) { 093 System.out.println("Exiting. Kill the application if it does not exit " 094 + "due to daemon threads."); 095 return; 096 } 097 } 098 } 099 100 101 private static void usage(final String msg) { 102 System.err.println(msg); 103 System.err.println("Usage: java " + JmsQueueReceiver.class.getName() 104 + " QueueConnectionFactoryBindingName QueueBindingName username password"); 105 System.exit(1); 106 } 107 }