001 /*
002 *
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements. See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership. The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License. You may obtain a copy of the License at
010 *
011 * http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied. See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 *
020 */
021 package org.apache.qpid.client.protocol;
022
023 class HeartbeatDiagnostics
024 {
025 private static final Diagnostics _impl = init();
026
027 private static Diagnostics init()
028 {
029 return Boolean.getBoolean("amqj.heartbeat.diagnostics") ? new On() : new Off();
030 }
031
032 static void sent()
033 {
034 _impl.sent();
035 }
036
037 static void timeout()
038 {
039 _impl.timeout();
040 }
041
042 static void received(boolean heartbeat)
043 {
044 _impl.received(heartbeat);
045 }
046
047 static void init(int delay, int timeout)
048 {
049 _impl.init(delay, timeout);
050 }
051
052 private static interface Diagnostics
053 {
054 void sent();
055 void timeout();
056 void received(boolean heartbeat);
057 void init(int delay, int timeout);
058 }
059
060 private static class On implements Diagnostics
061 {
062 private final String[] messages = new String[50];
063 private int i;
064
065 private void save(String msg)
066 {
067 messages[i++] = msg;
068 if(i >= messages.length){
069 i = 0;//i.e. a circular buffer
070 }
071 }
072
073 public void sent()
074 {
075 save(System.currentTimeMillis() + ": sent heartbeat");
076 }
077
078 public void timeout()
079 {
080 for(int i = 0; i < messages.length; i++)
081 {
082 if(messages[i] != null)
083 {
084 System.out.println(messages[i]);
085 }
086 }
087 System.out.println(System.currentTimeMillis() + ": timed out");
088 }
089
090 public void received(boolean heartbeat)
091 {
092 save(System.currentTimeMillis() + ": received " + (heartbeat ? "heartbeat" : "data"));
093 }
094
095 public void init(int delay, int timeout)
096 {
097 System.out.println(System.currentTimeMillis() + ": initialised delay=" + delay + ", timeout=" + timeout);
098 }
099 }
100
101 private static class Off implements Diagnostics
102 {
103 public void sent()
104 {
105
106 }
107 public void timeout()
108 {
109
110 }
111 public void received(boolean heartbeat)
112 {
113
114 }
115
116 public void init(int delay, int timeout)
117 {
118
119 }
120 }
121 }
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