/*
* Copyright 2012-2016 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.springframework.boot.maven;
import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.List;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugins.annotations.Execute;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;
import org.apache.maven.plugins.annotations.ResolutionScope;
import org.springframework.boot.loader.tools.JavaExecutable;
import org.springframework.boot.loader.tools.RunProcess;
/**
* Run an executable archive application.
*
* @author Phillip Webb
* @author Stephane Nicoll
* @author Andy Wilkinson
*/
@Mojo(name = "run", requiresProject = true, defaultPhase = LifecyclePhase.VALIDATE, requiresDependencyResolution = ResolutionScope.TEST)
@Execute(phase = LifecyclePhase.TEST_COMPILE)
public class RunMojo extends AbstractRunMojo {
private static final int EXIT_CODE_SIGINT = 130;
private static final String RESTARTER_CLASS_LOCATION = "org/springframework/boot/devtools/restart/Restarter.class";
/**
* Devtools presence flag to avoid checking for it several times per execution.
*/
private Boolean hasDevtools;
@Override
protected boolean enableForkByDefault() {
return super.enableForkByDefault() || hasDevtools();
}
@Override
protected void logDisabledFork() {
super.logDisabledFork();
if (hasDevtools()) {
getLog().warn("Fork mode disabled, devtools will be disabled");
}
}
@Override
protected void runWithForkedJvm(File workingDirectory, List<String> args)
throws MojoExecutionException {
try {
RunProcess runProcess = new RunProcess(workingDirectory,
new JavaExecutable().toString());
Runtime.getRuntime()
.addShutdownHook(new Thread(new RunProcessKiller(runProcess)));
int exitCode = runProcess.run(true, args.toArray(new String[args.size()]));
if (exitCode == 0 || exitCode == EXIT_CODE_SIGINT) {
return;
}
throw new MojoExecutionException(
"Application finished with exit code: " + exitCode);
}
catch (Exception ex) {
throw new MojoExecutionException("Could not exec java", ex);
}
}
@Override
protected void runWithMavenJvm(String startClassName, String... arguments)
throws MojoExecutionException {
IsolatedThreadGroup threadGroup = new IsolatedThreadGroup(startClassName);
Thread launchThread = new Thread(threadGroup,
new LaunchRunner(startClassName, arguments), "main");
launchThread.setContextClassLoader(new URLClassLoader(getClassPathUrls()));
launchThread.start();
join(threadGroup);
threadGroup.rethrowUncaughtException();
}
private void join(ThreadGroup threadGroup) {
boolean hasNonDaemonThreads;
do {
hasNonDaemonThreads = false;
Thread[] threads = new Thread[threadGroup.activeCount()];
threadGroup.enumerate(threads);
for (Thread thread : threads) {
if (thread != null && !thread.isDaemon()) {
try {
hasNonDaemonThreads = true;
thread.join();
}
catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
}
}
}
while (hasNonDaemonThreads);
}
private boolean hasDevtools() {
if (this.hasDevtools == null) {
this.hasDevtools = checkForDevtools();
}
return this.hasDevtools;
}
@SuppressWarnings("resource")
private boolean checkForDevtools() {
try {
URL[] urls = getClassPathUrls();
URLClassLoader classLoader = new URLClassLoader(urls);
return (classLoader.findResource(RESTARTER_CLASS_LOCATION) != null);
}
catch (Exception ex) {
return false;
}
}
private static final class RunProcessKiller implements Runnable {
private final RunProcess runProcess;
private RunProcessKiller(RunProcess runProcess) {
this.runProcess = runProcess;
}
@Override
public void run() {
this.runProcess.kill();
}
}
}