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/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.ce.app;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableMap;
import java.util.concurrent.CountDownLatch;
import javax.annotation.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.sonar.ce.ComputeEngine;
import org.sonar.ce.ComputeEngineImpl;
import org.sonar.ce.container.ComputeEngineContainerImpl;
import org.sonar.ce.logging.CeProcessLogging;
import org.sonar.process.MinimumViableSystem;
import org.sonar.process.Monitored;
import org.sonar.process.ProcessEntryPoint;
import org.sonar.process.Props;
import static com.google.common.base.Preconditions.checkState;
import static org.sonar.process.ProcessId.COMPUTE_ENGINE;
/**
* The Compute Engine server which starts a daemon thread to run the {@link ComputeEngineImpl} when it's {@link #start()}
* method is called.
* <p>
* This is the class to call to run a standalone {@link ComputeEngineImpl} (see {@link #main(String[])}).
* </p>
*/
public class CeServer implements Monitored {
private static final Logger LOG = LoggerFactory.getLogger(CeServer.class);
private static final String CE_MAIN_THREAD_NAME = "ce-main";
private final CountDownLatch awaitStop = new CountDownLatch(1);
private final ComputeEngine computeEngine;
@Nullable
private CeMainThread ceMainThread = null;
@VisibleForTesting
protected CeServer(ComputeEngine computeEngine, MinimumViableSystem mvs) {
this.computeEngine = computeEngine;
mvs
.checkWritableTempDir()
.checkRequiredJavaOptions(ImmutableMap.of("file.encoding", "UTF-8"));
}
@Override
public void start() {
checkState(ceMainThread == null, "start() can not be called twice");
// start main thread
ceMainThread = new CeMainThread();
ceMainThread.start();
}
@Override
public Status getStatus() {
checkState(ceMainThread != null, "getStatus() can not be called before start()");
if (ceMainThread.isStarted()) {
return ceMainThread.isOperational() ? Status.OPERATIONAL : Status.FAILED;
}
return Status.DOWN;
}
@Override
public void awaitStop() {
checkState(ceMainThread != null, "awaitStop() must not be called before start()");
while (true) {
try {
awaitStop.await();
return;
} catch (InterruptedException e) {
// abort waiting
}
}
}
@Override
public void stop() {
if (ceMainThread != null) {
ceMainThread.stopIt();
awaitStop();
}
}
@Override
public void hardStop() {
if (ceMainThread != null) {
ceMainThread.stopItNow();
awaitStop();
}
}
/**
* Can't be started as is. Needs to be bootstrapped by sonar-application
*/
public static void main(String[] args) {
ProcessEntryPoint entryPoint = ProcessEntryPoint.createForArguments(args);
Props props = entryPoint.getProps();
new CeProcessLogging().configure(props);
CeServer server = new CeServer(
new ComputeEngineImpl(props, new ComputeEngineContainerImpl()),
new MinimumViableSystem());
entryPoint.launch(server);
}
private class CeMainThread extends Thread {
private final CountDownLatch stopSignal = new CountDownLatch(1);
private volatile boolean started = false;
private volatile boolean operational = false;
private volatile boolean hardStop = false;
private volatile boolean dontInterrupt = false;
public CeMainThread() {
super(CE_MAIN_THREAD_NAME);
}
@Override
public void run() {
boolean startupSuccessful = attemptStartup();
this.operational = startupSuccessful;
this.started = true;
try {
if (startupSuccessful) {
try {
stopSignal.await();
} catch (InterruptedException e) {
// don't restore interrupt flag since it would be unset in attemptShutdown anyway
}
attemptShutdown();
}
} finally {
// release thread(s) waiting for CeServer to stop
signalAwaitStop();
}
}
private boolean attemptStartup() {
try {
LOG.info("{} starting up...", COMPUTE_ENGINE.getHumanReadableName());
computeEngine.startup();
LOG.info("{} is started", COMPUTE_ENGINE.getHumanReadableName());
return true;
} catch (org.sonar.api.utils.MessageException | org.sonar.process.MessageException e) {
LOG.error("{} startup failed: {}", COMPUTE_ENGINE.getHumanReadableName(), e.getMessage());
return false;
} catch (Throwable e) {
LOG.error("{} startup failed", COMPUTE_ENGINE.getHumanReadableName(), e);
return false;
}
}
private void attemptShutdown() {
try {
LOG.info("{} is stopping...", COMPUTE_ENGINE.getHumanReadableName());
if (!hardStop) {
computeEngine.stopProcessing();
}
dontInterrupt = true;
// make sure that interrupt flag is unset because we don't want to interrupt shutdown of pico container
interrupted();
computeEngine.shutdown();
LOG.info("{} is stopped", COMPUTE_ENGINE.getHumanReadableName());
} catch (Throwable e) {
LOG.error("{} failed to stop", COMPUTE_ENGINE.getHumanReadableName(), e);
}
}
public boolean isStarted() {
return started;
}
public boolean isOperational() {
return operational;
}
public void stopIt() {
stopSignal.countDown();
}
public void stopItNow() {
hardStop = true;
stopSignal.countDown();
// interrupt current thread unless it's already performing shutdown
if (!dontInterrupt) {
interrupt();
}
}
private void signalAwaitStop() {
awaitStop.countDown();
}
}
}
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