Java tutorial
// The contents of this file are subject to the Mozilla Public License // Version 1.1 (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.mozilla.org/MPL/ // // Software distributed under the License is distributed on an "AS IS" // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See // the License for the specific language governing rights and // limitations under the License. // // The Original Code is RabbitMQ. // // The Initial Developer of the Original Code is GoPivotal, Inc. // Copyright (c) 2007-2013 GoPivotal, Inc. All rights reserved. // package com.rabbitmq.client3.test.performance; import java.io.FileOutputStream; import java.io.IOException; import java.io.PrintStream; import java.text.DecimalFormat; import java.text.NumberFormat; import java.util.Random; import java.util.Stack; import java.util.UUID; import java.util.Vector; import java.util.concurrent.CountDownLatch; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.Option; import com.rabbitmq.client3.AMQP; import com.rabbitmq.client3.Channel; import com.rabbitmq.client3.Connection; import com.rabbitmq.client3.ConnectionFactory; import com.rabbitmq.client3.MessageProperties; import com.rabbitmq.client3.ReturnListener; /** * This tests the scalability of the routing tables in two aspects: * * 1. The rate of creation and deletion for a fixed level of bindings * per queue accross varying amounts of queues; * * 2. The rate of publishing n messages to an exchange with a fixed * amount of bindings per queue accross varying amounts of queues. */ public class ScalabilityTest { private static class Parameters { String host; int port; int messageCount; int base, maxQueueExp, maxBindingExp, maxExp; String filePrefix; } private abstract static class Measurements { protected long[] times; private long start; public Measurements(final int count) { times = new long[count]; start = System.nanoTime(); } public void addDataPoint(final int i) { times[i] = System.nanoTime() - start; } abstract public float[] analyse(final int base); protected static float[] calcOpTimes(final int base, final long[] t) { float[] r = new float[t.length]; for (int i = 0; i < t.length; i++) { final int amount = pow(base, i); r[i] = t[i] / (float) amount / 1000; } return r; } } private static class CreationMeasurements extends Measurements { public CreationMeasurements(final int count) { super(count); } public float[] analyse(final int base) { return calcOpTimes(base, times); } } private static class DeletionMeasurements extends Measurements { public DeletionMeasurements(final int count) { super(count); } public float[] analyse(final int base) { final long tmp[] = new long[times.length]; final long totalTime = times[0]; int i; for (i = 0; i < times.length - 1; i++) { tmp[i] = totalTime - times[i + 1]; } tmp[i] = totalTime; return calcOpTimes(base, tmp); } } private static class Results { float[][] creationTimes; float[][] deletionTimes; float[][] routingTimes; public Results(final int y) { creationTimes = new float[y][]; deletionTimes = new float[y][]; routingTimes = new float[y][]; } public void print(final int base, final String prefix) throws IOException { PrintStream s; s = open(prefix, "creation"); print(s, base, creationTimes); s.close(); s = open(prefix, "deletion"); print(s, base, deletionTimes); s.close(); s = open(prefix, "routing"); print(s, base, transpose(routingTimes)); s.close(); } private static PrintStream open(final String prefix, final String suffix) throws IOException { return new PrintStream(new FileOutputStream(prefix + suffix + ".dat")); } private static void print(final PrintStream s, final int base, final float[][] times) { for (int y = 0; y < times.length; y++) { s.println("# level " + pow(base, y)); for (int x = 0; x < times[y].length; x++) { s.println(pow(base, x) + " " + format.format(times[y][x])); } s.println(); s.println(); } } private float[][] transpose(float[][] m) { Vector<Vector<Float>> tmp = new Vector<Vector<Float>>(); for (int i = 0; i < m[0].length; i++) { tmp.addElement(new Vector<Float>()); } for (int i = 0; i < m.length; i++) { for (int j = 0; j < m[i].length; j++) { Vector<Float> v = tmp.get(j); v.addElement(m[i][j]); } } float[][] r = new float[tmp.size()][]; for (int i = 0; i < tmp.size(); i++) { Vector<Float> v = tmp.get(i); float[] vr = new float[v.size()]; for (int j = 0; j < v.size(); j++) { vr[j] = v.get(j); } r[i] = vr; } return r; } } private static NumberFormat format = new DecimalFormat("0.00"); private final Parameters params; public ScalabilityTest(Parameters p) { params = p; } public static void main(String[] args) throws Exception { Parameters params = parseArgs(args); if (params == null) return; ScalabilityTest test = new ScalabilityTest(params); Results r = test.run(); if (params.filePrefix != null) r.print(params.base, params.filePrefix); } public Results run() throws Exception { Connection con = new ConnectionFactory() { { setHost(params.host); setPort(params.port); } }.newConnection(); Channel channel = con.createChannel(); Results r = new Results(params.maxBindingExp); for (int y = 0; y < params.maxBindingExp; y++) { final int maxBindings = pow(params.base, y); String[] routingKeys = new String[maxBindings]; for (int b = 0; b < maxBindings; b++) { routingKeys[b] = UUID.randomUUID().toString(); } Stack<String> queues = new Stack<String>(); int maxQueueExp = Math.min(params.maxQueueExp, params.maxExp - y); System.out.println("---------------------------------"); System.out.println("| bindings = " + maxBindings + ", messages = " + params.messageCount); System.out.println("| Routing"); int q = 0; // create queues & bindings, time routing Measurements creation = new CreationMeasurements(maxQueueExp); float routingTimes[] = new float[maxQueueExp]; for (int x = 0; x < maxQueueExp; x++) { final int maxQueues = pow(params.base, x); for (; q < maxQueues; q++) { AMQP.Queue.DeclareOk ok = channel.queueDeclare(); queues.push(ok.getQueue()); for (int b = 0; b < maxBindings; b++) { channel.queueBind(ok.getQueue(), "amq.direct", routingKeys[b]); } } creation.addDataPoint(x); float routingTime = timeRouting(channel, routingKeys); routingTimes[x] = routingTime; printTime(params.base, x, routingTime); } r.routingTimes[y] = routingTimes; float[] creationTimes = creation.analyse(params.base); r.creationTimes[y] = creationTimes; System.out.println("| Creating"); printTimes(params.base, creationTimes); // delete queues & bindings Measurements deletion = new DeletionMeasurements(maxQueueExp); for (int x = maxQueueExp - 1; x >= 0; x--) { final int maxQueues = (x == 0) ? 0 : pow(params.base, x - 1); for (; q > maxQueues; q--) { channel.queueDelete(queues.pop()); } deletion.addDataPoint(x); } float[] deletionTimes = deletion.analyse(params.base); r.deletionTimes[y] = deletionTimes; System.out.println("| Deleting"); printTimes(params.base, deletionTimes); } channel.close(); con.close(); return r; } private float timeRouting(Channel channel, String[] routingKeys) throws IOException, InterruptedException { boolean mandatory = true; boolean immdediate = true; final CountDownLatch latch = new CountDownLatch(params.messageCount); channel.addReturnListener(new ReturnListener() { public void handleReturn(int replyCode, String replyText, String exchange, String routingKey, AMQP.BasicProperties properties, byte[] body) throws IOException { latch.countDown(); } }); final long start = System.nanoTime(); // route some messages Random r = new Random(); int size = routingKeys.length; for (int n = 0; n < params.messageCount; n++) { String key = routingKeys[r.nextInt(size)]; channel.basicPublish("amq.direct", key, mandatory, immdediate, MessageProperties.MINIMAL_BASIC, null); } // wait for the returns to come back latch.await(); // Compute the roundtrip time final long finish = System.nanoTime(); final long wallclock = finish - start; return (params.messageCount == 0) ? (float) 0.0 : wallclock / (float) params.messageCount / 1000; } private static Parameters parseArgs(String[] args) { CLIHelper helper = CLIHelper.defaultHelper(); helper.addOption(new Option("n", "messages", true, "number of messages to send")); helper.addOption(new Option("b", "base", true, "base for exponential scaling")); helper.addOption(new Option("x", "q-max-exp", true, "maximum queue count exponent")); helper.addOption(new Option("y", "b-max-exp", true, "maximum per-queue binding count exponent")); helper.addOption(new Option("c", "c-max-exp", true, "combined maximum exponent")); helper.addOption(new Option("f", "file", true, "result files prefix; defaults to no file output")); CommandLine cmd = helper.parseCommandLine(args); if (null == cmd) return null; Parameters params = new Parameters(); params.host = cmd.getOptionValue("h", "0.0.0.0"); params.port = CLIHelper.getOptionValue(cmd, "p", AMQP.PROTOCOL.PORT); params.messageCount = CLIHelper.getOptionValue(cmd, "n", 100); params.base = CLIHelper.getOptionValue(cmd, "b", 10); params.maxQueueExp = CLIHelper.getOptionValue(cmd, "x", 4); params.maxBindingExp = CLIHelper.getOptionValue(cmd, "y", 4); params.maxExp = CLIHelper.getOptionValue(cmd, "c", Math.max(params.maxQueueExp, params.maxBindingExp)); params.filePrefix = cmd.getOptionValue("f", null); return params; } private static int pow(int x, int y) { int r = 1; for (int i = 0; i < y; i++) r *= x; return r; } private static void printTimes(int base, float[] times) { for (int i = 0; i < times.length; i++) { printTime(base, i, times[i]); } } private static void printTime(int base, int exp, float v) { System.out.println("| " + pow(base, exp) + " -> " + format.format(v) + " us/op"); } }