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Glowroot Agent Integration Test Harness
/*
* Copyright 2011-2018 the original author or authors.
*
* Licensed 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.glowroot.agent.it.harness.impl;
import java.io.File;
import java.net.ServerSocket;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.Executors;
import org.glowroot.agent.it.harness.shaded.com.google.common.collect.ImmutableMap;
import org.glowroot.agent.it.harness.shaded.com.google.common.collect.Maps;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.glowroot.agent.MainEntryPoint;
import org.glowroot.agent.init.GlowrootAgentInit;
import org.glowroot.agent.it.harness.AppUnderTest;
import org.glowroot.agent.it.harness.ConfigService;
import org.glowroot.agent.it.harness.Container;
import org.glowroot.agent.it.harness.TempDirs;
import org.glowroot.agent.weaving.IsolatedWeavingClassLoader;
import org.glowroot.wire.api.model.TraceOuterClass.Trace;
import static org.glowroot.agent.it.harness.shaded.com.google.common.base.Preconditions.checkNotNull;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
public class LocalContainer implements Container {
private final File testDir;
private final boolean deleteTestDirOnClose;
private volatile @Nullable IsolatedWeavingClassLoader isolatedWeavingClassLoader;
private final @Nullable GrpcServerWrapper server;
private final @Nullable TraceCollector traceCollector;
private final GlowrootAgentInit glowrootAgentInit;
private final @Nullable ConfigServiceImpl configService;
private volatile @Nullable Thread executingAppThread;
public static LocalContainer create() throws Exception {
return new LocalContainer(null, false, ImmutableMap.of());
}
public static LocalContainer create(File testDir) throws Exception {
return new LocalContainer(testDir, false, ImmutableMap.of());
}
public LocalContainer(@Nullable File testDir, boolean embedded,
Map extraProperties) throws Exception {
if (testDir == null) {
this.testDir = TempDirs.createTempDir("glowroot-test-dir");
deleteTestDirOnClose = true;
} else {
this.testDir = testDir;
deleteTestDirOnClose = false;
}
boolean pointingToCentral = extraProperties.containsKey("glowroot.collector.address");
final Map properties = Maps.newHashMap();
properties.put("glowroot.test.dir", this.testDir.getAbsolutePath());
if (embedded || pointingToCentral) {
traceCollector = null;
server = null;
} else {
int collectorPort = getAvailablePort();
traceCollector = new TraceCollector();
server = new GrpcServerWrapper(traceCollector, collectorPort);
properties.put("glowroot.collector.address",
"localhost:" + Integer.toString(collectorPort));
}
isolatedWeavingClassLoader = new IsolatedWeavingClassLoader(AppUnderTest.class);
properties.putAll(extraProperties);
// start up in separate thread to avoid the main thread from being capture by netty
// ThreadDeathWatcher, which then causes PermGen OOM during maven test
Executors.newSingleThreadExecutor().submit(new Callable() {
@Override
public @Nullable Void call() throws Exception {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(isolatedWeavingClassLoader);
try {
MainEntryPoint.start(properties);
} finally {
Thread.currentThread().setContextClassLoader(loader);
}
return null;
}
}).get();
glowrootAgentInit = checkNotNull(MainEntryPoint.getGlowrootAgentInit());
if (server == null) {
configService = null;
glowrootAgentInit.setSlowThresholdToZero();
} else {
configService = new ConfigServiceImpl(server, false);
// need to set through config service so config service can keep track of changes,
// otherwise it will clobber slow threshold value on next update through config service
configService.setSlowThresholdToZero();
}
}
@Override
public ConfigService getConfigService() {
checkNotNull(configService);
return configService;
}
@Override
public void addExpectedLogMessage(String loggerName, String partialMessage) {
checkNotNull(traceCollector);
traceCollector.addExpectedLogMessage(loggerName, partialMessage);
}
@Override
public Trace execute(Class appClass) throws Exception {
return executeInternal(appClass, null, null);
}
@Override
public Trace execute(Class appClass, String transactionType)
throws Exception {
return executeInternal(appClass, transactionType, null);
}
@Override
public Trace execute(Class appClass, String transactionType,
String transactionName) throws Exception {
return executeInternal(appClass, transactionType, transactionName);
}
@Override
public void executeNoExpectedTrace(Class appClass) throws Exception {
executeInternal(appClass);
MILLISECONDS.sleep(10);
if (traceCollector != null && traceCollector.hasTrace()) {
throw new IllegalStateException("Trace was collected when none was expected");
}
}
@Override
public void interruptAppUnderTest() throws Exception {
Thread thread = executingAppThread;
if (thread == null) {
throw new IllegalStateException("No app currently executing");
}
thread.interrupt();
}
@Override
public Trace getCollectedPartialTrace() throws InterruptedException {
checkNotNull(traceCollector);
return traceCollector.getPartialTrace(10, SECONDS);
}
@Override
public void checkAndReset() throws Exception {
if (configService == null) {
glowrootAgentInit.resetConfig();
} else {
// need to reset through config service so config service can keep track of changes,
// otherwise it will clobber the reset config on next update through config service
configService.resetConfig();
}
if (traceCollector != null) {
traceCollector.checkAndResetLogMessages();
}
}
@Override
public void close() throws Exception {
glowrootAgentInit.close();
if (server != null) {
server.close();
}
glowrootAgentInit.awaitClose();
if (deleteTestDirOnClose) {
TempDirs.deleteRecursively(testDir);
}
// release class loader to prevent PermGen OOM during maven test
isolatedWeavingClassLoader = null;
}
public Trace executeInternal(Class appClass,
@Nullable String transactionType, @Nullable String transactionName) throws Exception {
checkNotNull(traceCollector);
executeInternal(appClass);
Trace trace =
traceCollector.getCompletedTrace(transactionType, transactionName, 10, SECONDS);
traceCollector.clearTrace();
return trace;
}
private void executeInternal(Class appClass) throws Exception {
IsolatedWeavingClassLoader isolatedWeavingClassLoader = this.isolatedWeavingClassLoader;
checkNotNull(isolatedWeavingClassLoader);
ClassLoader previousContextClassLoader = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(isolatedWeavingClassLoader);
executingAppThread = Thread.currentThread();
try {
AppUnderTest app = isolatedWeavingClassLoader.newInstance(appClass, AppUnderTest.class);
app.executeApp();
} finally {
executingAppThread = null;
Thread.currentThread().setContextClassLoader(previousContextClassLoader);
}
}
static int getAvailablePort() throws Exception {
ServerSocket serverSocket = new ServerSocket(0);
int port = serverSocket.getLocalPort();
serverSocket.close();
return port;
}
}