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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.client.protocol;
class HeartbeatDiagnostics
{
private static final Diagnostics _impl = init();
private HeartbeatDiagnostics()
{
}
private static Diagnostics init()
{
return Boolean.getBoolean("amqj.heartbeat.diagnostics") ? new On() : new Off();
}
static void sent()
{
_impl.sent();
}
static void timeout()
{
_impl.timeout();
}
static void received(boolean heartbeat)
{
_impl.received(heartbeat);
}
static void init(int delay, int timeout)
{
_impl.init(delay, timeout);
}
private static interface Diagnostics
{
void sent();
void timeout();
void received(boolean heartbeat);
void init(int delay, int timeout);
}
private static class On implements Diagnostics
{
private final String[] messages = new String[50];
private int i;
private void save(String msg)
{
messages[i++] = msg;
if(i >= messages.length){
i = 0;//i.e. a circular buffer
}
}
public void sent()
{
save(System.currentTimeMillis() + ": sent heartbeat");
}
public void timeout()
{
for(int i = 0; i < messages.length; i++)
{
if(messages[i] != null)
{
System.out.println(messages[i]);
}
}
System.out.println(System.currentTimeMillis() + ": timed out");
}
public void received(boolean heartbeat)
{
save(System.currentTimeMillis() + ": received " + (heartbeat ? "heartbeat" : "data"));
}
public void init(int delay, int timeout)
{
System.out.println(System.currentTimeMillis() + ": initialised delay=" + delay + ", timeout=" + timeout);
}
}
private static class Off implements Diagnostics
{
public void sent()
{
}
public void timeout()
{
}
public void received(boolean heartbeat)
{
}
public void init(int delay, int timeout)
{
}
}
}
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