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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.tools;
import java.util.concurrent.CountDownLatch;
import javax.jms.MapMessage;
import org.apache.qpid.thread.Threading;
import org.apache.qpid.tools.report.MercuryReporter;
import org.apache.qpid.tools.report.MercuryReporter.MercuryThroughputAndLatency;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* PerfConsumer will receive x no of messages in warmup mode.
* Once it receives the Start message it will then signal the PerfProducer.
* It will start recording stats from the first message it receives after
* the warmup mode is done.
*
* The following calculations are done.
* The important numbers to look at is
* a) Avg Latency
* b) System throughput.
*
* Latency.
* =========
* Currently this test is written with the assumption that either
* a) The Perf Producer and Consumer are on the same machine
* b) They are on separate machines that have their time synced via a Time Server
*
* In order to calculate latency the producer inserts a timestamp
* when the message is sent. The consumer will note the current time the message is
* received and will calculate the latency as follows
* latency = rcvdTime - msg.getJMSTimestamp()
*
* Through out the test it will keep track of the max and min latency to show the
* variance in latencies.
*
* Avg latency is measured by adding all latencies and dividing by the total msgs.
*
* Throughput
* ===========
* Consumer rate is calculated as
* rcvdMsgCount/(rcvdTime - startTime)
*
* Note that the testStartTime referes to when the producer sent the first message
* and startTime is when the consumer first received a message.
*
* rcvdTime keeps track of when the last message is received.
*
* All throughput rates are given as msg/sec so the rates are multiplied by 1000.
*
*/
public class MercuryConsumerController extends MercuryBase
{
private static final Logger _logger = LoggerFactory.getLogger(MercuryConsumerController.class);
MercuryReporter reporter;
TestConfiguration config;
QpidReceive receiver;
public MercuryConsumerController(TestConfiguration config, MercuryReporter reporter, String prefix)
{
super(config,prefix);
this.reporter = reporter;
if (_logger.isInfoEnabled())
{
_logger.info("Consumer ID : " + id);
}
}
public void setUp() throws Exception
{
super.setUp();
receiver = new QpidReceive(reporter,config, con,dest);
receiver.setUp();
MapMessage m = controllerSession.createMapMessage();
m.setInt(CODE, OPCode.REGISTER_CONSUMER.ordinal());
sendMessageToController(m);
}
public void warmup()throws Exception
{
receiveFromController(OPCode.CONSUMER_STARTWARMUP);
receiver.waitforCompletion(config.getWarmupCount());
// It's more realistic for the consumer to signal this.
MapMessage m1 = controllerSession.createMapMessage();
m1.setInt(CODE, OPCode.PRODUCER_READY.ordinal());
sendMessageToController(m1);
MapMessage m2 = controllerSession.createMapMessage();
m2.setInt(CODE, OPCode.CONSUMER_READY.ordinal());
sendMessageToController(m2);
}
public void runReceiver() throws Exception
{
if (_logger.isInfoEnabled())
{
_logger.info("Consumer: " + id + " Starting iteration......" + "\n");
}
resetCounters();
receiver.waitforCompletion(config.getMsgCount());
MapMessage m = controllerSession.createMapMessage();
m.setInt(CODE, OPCode.RECEIVED_END_MSG.ordinal());
sendMessageToController(m);
}
public void resetCounters()
{
reporter.clear();
}
public void sendResults() throws Exception
{
receiveFromController(OPCode.CONSUMER_STOP);
reporter.report();
MapMessage m = controllerSession.createMapMessage();
m.setInt(CODE, OPCode.RECEIVED_CONSUMER_STATS.ordinal());
m.setDouble(AVG_LATENCY, reporter.getAvgLatency());
m.setDouble(MIN_LATENCY, reporter.getMinLatency());
m.setDouble(MAX_LATENCY, reporter.getMaxLatency());
m.setDouble(STD_DEV, reporter.getStdDev());
m.setDouble(CONS_RATE, reporter.getRate());
m.setLong(MSG_COUNT, reporter.getSampleSize());
sendMessageToController(m);
reporter.log(new StringBuilder("Total Msgs Received : ").append(reporter.getSampleSize()).toString());
reporter.log(new StringBuilder("Consumer rate : ").
append(config.getDecimalFormat().format(reporter.getRate())).
append(" msg/sec").toString());
reporter.log(new StringBuilder("Avg Latency : ").
append(config.getDecimalFormat().format(reporter.getAvgLatency())).
append(" ms").toString());
reporter.log(new StringBuilder("Min Latency : ").
append(config.getDecimalFormat().format(reporter.getMinLatency())).
append(" ms").toString());
reporter.log(new StringBuilder("Max Latency : ").
append(config.getDecimalFormat().format(reporter.getMaxLatency())).
append(" ms").toString());
if (config.isPrintStdDev())
{
reporter.log(new StringBuilder("Std Dev : ").
append(reporter.getStdDev()).toString());
}
}
public void run()
{
try
{
setUp();
warmup();
boolean nextIteration = true;
while (nextIteration)
{
System.out.println("=========================================================\n");
System.out.println("Consumer: " + id + " starting a new iteration ......\n");
runReceiver();
sendResults();
nextIteration = continueTest();
}
tearDown();
}
catch(Exception e)
{
handleError(e,"Error when running test");
}
}
@Override
public void tearDown() throws Exception
{
super.tearDown();
}
public static void main(String[] args) throws Exception
{
TestConfiguration config = new JVMArgConfiguration();
MercuryReporter reporter= new MercuryReporter(MercuryThroughputAndLatency.class,System.out,10,true);
String scriptId = (args.length == 1) ? args[0] : "";
int conCount = config.getConnectionCount();
final CountDownLatch testCompleted = new CountDownLatch(conCount);
for (int i=0; i < conCount; i++)
{
final MercuryConsumerController cons = new MercuryConsumerController(config, reporter, scriptId + i);
Runnable r = new Runnable()
{
public void run()
{
cons.run();
testCompleted.countDown();
}
};
Thread t;
try
{
t = Threading.getThreadFactory().createThread(r);
}
catch(Exception e)
{
throw new Error("Error creating consumer thread",e);
}
t.start();
}
testCompleted.await();
reporter.log("Consumers have completed the test......\n");
}
}
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