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/*
* Copyright 2016, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package io.grpc.testing.integration;
import static java.util.Arrays.asList;
import static java.util.Collections.shuffle;
import static java.util.Collections.singletonList;
import static java.util.concurrent.Executors.newFixedThreadPool;
import static java.util.concurrent.TimeUnit.SECONDS;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;
import com.google.common.collect.Iterators;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.ListeningExecutorService;
import com.google.common.util.concurrent.MoreExecutors;
import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
import io.grpc.Server;
import io.grpc.ServerBuilder;
import io.grpc.Status;
import io.grpc.StatusException;
import io.grpc.stub.StreamObserver;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A stress test client following the
*
* specifications of the gRPC stress testing framework.
*/
public class StressTestClient {
private static final Logger log = Logger.getLogger(StressTestClient.class.getName());
/**
* The main application allowing this client to be launched from the command line.
*/
public static void main(String... args) throws Exception {
final StressTestClient client = new StressTestClient();
client.parseArgs(args);
// Attempt an orderly shutdown, if the JVM is shutdown via a signal.
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
client.shutdown();
}
});
try {
client.startMetricsService();
client.runStressTest();
client.blockUntilStressTestComplete();
} catch (Exception e) {
log.log(Level.WARNING, "The stress test client encountered an error!", e);
} finally {
client.shutdown();
}
}
private static final int WORKER_GRACE_PERIOD_SECS = 30;
private List addresses =
singletonList(new InetSocketAddress("localhost", 8080));
private List testCaseWeightPairs = new ArrayList();
private int durationSecs = -1;
private int channelsPerServer = 1;
private int stubsPerChannel = 1;
private int metricsPort = 8081;
private Server metricsServer;
private final Map gauges =
new ConcurrentHashMap();
private volatile boolean shutdown;
/**
* List of futures that {@link #blockUntilStressTestComplete()} waits for.
*/
private final List> workerFutures =
new ArrayList>();
private final List channels = new ArrayList();
private ListeningExecutorService threadpool;
@VisibleForTesting
void parseArgs(String[] args) {
boolean usage = false;
for (String arg : args) {
if (!arg.startsWith("--")) {
System.err.println("All arguments must start with '--': " + arg);
usage = true;
break;
}
String[] parts = arg.substring(2).split("=", 2);
String key = parts[0];
if ("help".equals(key)) {
usage = true;
break;
}
if (parts.length != 2) {
System.err.println("All arguments must be of the form --arg=value");
usage = true;
break;
}
String value = parts[1];
if ("server_addresses".equals(key)) {
addresses = parseServerAddresses(value);
usage = addresses.isEmpty();
} else if ("test_cases".equals(key)) {
testCaseWeightPairs = parseTestCases(value);
} else if ("test_duration_secs".equals(key)) {
durationSecs = Integer.valueOf(value);
} else if ("num_channels_per_server".equals(key)) {
channelsPerServer = Integer.valueOf(value);
} else if ("num_stubs_per_channel".equals(key)) {
stubsPerChannel = Integer.valueOf(value);
} else if ("metrics_port".equals(key)) {
metricsPort = Integer.valueOf(value);
} else {
System.err.println("Unknown argument: " + key);
usage = true;
break;
}
}
if (usage) {
StressTestClient c = new StressTestClient();
System.err.println(
"Usage: [ARGS...]"
+ "\n"
+ "\n --server_addresses=:,:...:"
+ "\n Default: " + serverAddressesToString(c.addresses)
+ "\n --test_cases=,..."
+ "\n List of tuples. Weight is the relative frequency at which"
+ " testcase is run."
+ "\n Valid Testcases:"
+ validTestCasesHelpText()
+ "\n --test_duration_secs=SECONDS '-1' for no limit. Default: " + c.durationSecs
+ "\n --num_channels_per_server=INT Number of connections to each server address."
+ " Default: " + c.channelsPerServer
+ "\n --num_stubs_per_channel=INT Default: " + c.stubsPerChannel
+ "\n --metrics_port=PORT Listening port of the metrics server."
+ " Default: " + c.metricsPort
);
System.exit(1);
}
}
@VisibleForTesting
void startMetricsService() throws IOException {
Preconditions.checkState(!shutdown, "client was shutdown.");
metricsServer = ServerBuilder.forPort(metricsPort)
.addService(MetricsServiceGrpc.bindService(new MetricsServiceImpl()))
.build()
.start();
}
@VisibleForTesting
void runStressTest() throws Exception {
Preconditions.checkState(!shutdown, "client was shutdown.");
if (testCaseWeightPairs.isEmpty()) {
return;
}
int numChannels = addresses.size() * channelsPerServer;
int numThreads = numChannels * stubsPerChannel;
threadpool = MoreExecutors.listeningDecorator(newFixedThreadPool(numThreads));
int serverIdx = -1;
for (InetSocketAddress address : addresses) {
serverIdx++;
for (int i = 0; i < channelsPerServer; i++) {
ManagedChannel channel = createChannel(address);
channels.add(channel);
for (int j = 0; j < stubsPerChannel; j++) {
String gaugeName =
String.format("/stress_test/server_%d/channel_%d/stub_%d/qps", serverIdx, i, j);
Worker worker =
new Worker(channel, testCaseWeightPairs, durationSecs, gaugeName);
workerFutures.add(threadpool.submit(worker));
}
}
}
}
@VisibleForTesting
void blockUntilStressTestComplete() throws Exception {
Preconditions.checkState(!shutdown, "client was shutdown.");
ListenableFuture f = Futures.allAsList(workerFutures);
if (durationSecs == -1) {
// '-1' indicates that the stress test runs until terminated by the user.
f.get();
} else {
f.get(durationSecs + WORKER_GRACE_PERIOD_SECS, SECONDS);
}
}
@VisibleForTesting
void shutdown() {
if (shutdown) {
return;
}
shutdown = true;
for (ManagedChannel ch : channels) {
try {
ch.shutdownNow();
ch.awaitTermination(1, SECONDS);
} catch (Throwable t) {
log.log(Level.WARNING, "Error shutting down channel!", t);
}
}
try {
metricsServer.shutdownNow();
} catch (Throwable t) {
log.log(Level.WARNING, "Error shutting down metrics service!", t);
}
try {
if (threadpool != null) {
threadpool.shutdownNow();
}
} catch (Throwable t) {
log.log(Level.WARNING, "Error shutting down threadpool.", t);
}
}
private static List parseServerAddresses(String addressesStr) {
List addresses = new ArrayList();
for (List namePort : parseCommaSeparatedTuples(addressesStr)) {
String name = namePort.get(0);
int port = Integer.valueOf(namePort.get(1));
addresses.add(new InetSocketAddress(name, port));
}
return addresses;
}
private static List parseTestCases(String testCasesStr) {
List testCaseWeightPairs = new ArrayList();
for (List nameWeight : parseCommaSeparatedTuples(testCasesStr)) {
TestCases testCase = TestCases.fromString(nameWeight.get(0));
int weight = Integer.valueOf(nameWeight.get(1));
testCaseWeightPairs.add(new TestCaseWeightPair(testCase, weight));
}
return testCaseWeightPairs;
}
private static List> parseCommaSeparatedTuples(String str) {
List> tuples = new ArrayList>();
for (String tupleStr : Splitter.on(',').split(str)) {
int splitIdx = tupleStr.lastIndexOf(':');
if (splitIdx == -1) {
throw new IllegalArgumentException("Illegal tuple format: '" + tupleStr + "'");
}
String part0 = tupleStr.substring(0, splitIdx);
String part1 = tupleStr.substring(splitIdx + 1);
tuples.add(asList(part0, part1));
}
return tuples;
}
private static ManagedChannel createChannel(InetSocketAddress address) {
return ManagedChannelBuilder.forAddress(address.getHostName(), address.getPort())
.usePlaintext(true)
.build();
}
private static String serverAddressesToString(List addresses) {
List tmp = new ArrayList();
for (InetSocketAddress address : addresses) {
URI uri;
try {
uri = new URI(null, null, address.getHostName(), address.getPort(), null, null, null);
} catch (URISyntaxException e) {
throw new RuntimeException(e);
}
tmp.add(uri.getAuthority());
}
return Joiner.on(',').join(tmp);
}
private static String validTestCasesHelpText() {
StringBuilder builder = new StringBuilder();
for (TestCases testCase : TestCases.values()) {
String strTestcase = testCase.name().toLowerCase();
builder.append("\n ")
.append(strTestcase)
.append(": ")
.append(testCase.description());
}
return builder.toString();
}
/**
* A stress test worker. Every stub has its own stress test worker.
*/
private class Worker implements Runnable {
// Interval at which the QPS stats of metrics service are updated.
private static final long METRICS_COLLECTION_INTERVAL_SECS = 5;
private final ManagedChannel channel;
private final List testCaseWeightPairs;
private final Integer durationSec;
private final String gaugeName;
Worker(ManagedChannel channel, List testCaseWeightPairs,
int durationSec, String gaugeName) {
Preconditions.checkArgument(durationSec >= -1, "durationSec must be gte -1.");
this.channel = Preconditions.checkNotNull(channel);
this.testCaseWeightPairs = Preconditions.checkNotNull(testCaseWeightPairs);
this.durationSec = durationSec == -1 ? null : durationSec;
this.gaugeName = Preconditions.checkNotNull(gaugeName);
}
@Override
public void run() {
// Simplify debugging if the worker crashes / never terminates.
Thread.currentThread().setName(gaugeName);
Tester tester = new Tester();
tester.setUp();
WeightedTestCaseSelector testCaseSelector = new WeightedTestCaseSelector(testCaseWeightPairs);
Long endTime = durationSec == null ? null : System.nanoTime() + SECONDS.toNanos(durationSecs);
long lastMetricsCollectionTime = initLastMetricsCollectionTime();
// Number of interop testcases run since the last time metrics have been updated.
long testCasesSinceLastMetricsCollection = 0;
while (!Thread.currentThread().isInterrupted() && !shutdown
&& (endTime == null || endTime - System.nanoTime() > 0)) {
try {
runTestCase(tester, testCaseSelector.nextTestCase());
} catch (Exception e) {
throw new RuntimeException(e);
}
testCasesSinceLastMetricsCollection++;
double durationSecs = computeDurationSecs(lastMetricsCollectionTime);
if (durationSecs >= METRICS_COLLECTION_INTERVAL_SECS) {
long qps = (long) Math.ceil(testCasesSinceLastMetricsCollection / durationSecs);
Metrics.GaugeResponse gauge = Metrics.GaugeResponse
.newBuilder()
.setName(gaugeName)
.setLongValue(qps)
.build();
gauges.put(gaugeName, gauge);
lastMetricsCollectionTime = System.nanoTime();
testCasesSinceLastMetricsCollection = 0;
}
}
}
private long initLastMetricsCollectionTime() {
return System.nanoTime() - SECONDS.toNanos(METRICS_COLLECTION_INTERVAL_SECS);
}
private double computeDurationSecs(long lastMetricsCollectionTime) {
return (System.nanoTime() - lastMetricsCollectionTime) / 1000000000.0;
}
private void runTestCase(Tester tester, TestCases testCase) throws Exception {
// TODO(buchgr): Implement tests requiring auth, once C++ supports it.
switch (testCase) {
case EMPTY_UNARY:
tester.emptyUnary();
break;
case LARGE_UNARY:
tester.largeUnary();
break;
case CLIENT_STREAMING:
tester.clientStreaming();
break;
case SERVER_STREAMING:
tester.serverStreaming();
break;
case PING_PONG:
tester.pingPong();
break;
case EMPTY_STREAM:
tester.emptyStream();
break;
case UNIMPLEMENTED_METHOD: {
tester.unimplementedMethod();
break;
}
case CANCEL_AFTER_BEGIN: {
tester.cancelAfterBegin();
break;
}
case CANCEL_AFTER_FIRST_RESPONSE: {
tester.cancelAfterFirstResponse();
break;
}
case TIMEOUT_ON_SLEEPING_SERVER: {
tester.timeoutOnSleepingServer();
break;
}
default:
throw new IllegalArgumentException("Unknown test case: " + testCase);
}
}
class Tester extends AbstractInteropTest {
@Override
protected ManagedChannel createChannel() {
return Worker.this.channel;
}
}
class WeightedTestCaseSelector {
/**
* Randomly shuffled and cyclic sequence that contains each testcase proportionally
* to its weight.
*/
final Iterator testCases;
WeightedTestCaseSelector(List testCaseWeightPairs) {
Preconditions.checkNotNull(testCaseWeightPairs);
Preconditions.checkArgument(testCaseWeightPairs.size() > 0);
List testCases = new ArrayList();
for (TestCaseWeightPair testCaseWeightPair : testCaseWeightPairs) {
for (int i = 0; i < testCaseWeightPair.weight; i++) {
testCases.add(testCaseWeightPair.testCase);
}
}
shuffle(testCases);
this.testCases = Iterators.cycle(testCases);
}
TestCases nextTestCase() {
return testCases.next();
}
}
}
/**
* Service that exports the QPS metrics of the stress test.
*/
private class MetricsServiceImpl implements MetricsServiceGrpc.MetricsService {
@Override
public void getAllGauges(Metrics.EmptyMessage request,
StreamObserver responseObserver) {
for (Metrics.GaugeResponse gauge : gauges.values()) {
responseObserver.onNext(gauge);
}
responseObserver.onCompleted();
}
@Override
public void getGauge(Metrics.GaugeRequest request,
StreamObserver responseObserver) {
String gaugeName = request.getName();
Metrics.GaugeResponse gauge = gauges.get(gaugeName);
if (gauge != null) {
responseObserver.onNext(gauge);
responseObserver.onCompleted();
} else {
responseObserver.onError(new StatusException(Status.NOT_FOUND));
}
}
}
@VisibleForTesting
static class TestCaseWeightPair {
final TestCases testCase;
final int weight;
TestCaseWeightPair(TestCases testCase, int weight) {
Preconditions.checkArgument(weight >= 0, "weight must be positive.");
this.testCase = Preconditions.checkNotNull(testCase);
this.weight = weight;
}
@Override
public boolean equals(Object other) {
if (!(other instanceof TestCaseWeightPair)) {
return false;
}
TestCaseWeightPair that = (TestCaseWeightPair) other;
return testCase.equals(that.testCase) && weight == that.weight;
}
@Override
public int hashCode() {
return Objects.hashCode(testCase, weight);
}
}
@VisibleForTesting
List addresses() {
return Collections.unmodifiableList(addresses);
}
@VisibleForTesting
List testCaseWeightPairs() {
return testCaseWeightPairs;
}
@VisibleForTesting
int durationSecs() {
return durationSecs;
}
@VisibleForTesting
int channelsPerServer() {
return channelsPerServer;
}
@VisibleForTesting
int stubsPerChannel() {
return stubsPerChannel;
}
@VisibleForTesting
int metricsPort() {
return metricsPort;
}
}
