/*
* Copyright 2017 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.gradle.workers.internal;
import org.gradle.api.internal.classloading.GroovySystemLoader;
import org.gradle.api.internal.classloading.GroovySystemLoaderFactory;
import org.gradle.api.logging.LogLevel;
import org.gradle.api.logging.Logger;
import org.gradle.internal.UncheckedException;
import org.gradle.internal.classloader.CachingClassLoader;
import org.gradle.internal.classloader.ClassLoaderFactory;
import org.gradle.internal.classloader.ClasspathUtil;
import org.gradle.internal.classloader.FilteringClassLoader;
import org.gradle.internal.classloader.MultiParentClassLoader;
import org.gradle.internal.classloader.VisitableURLClassLoader;
import org.gradle.internal.classpath.DefaultClassPath;
import org.gradle.internal.io.ClassLoaderObjectInputStream;
import org.gradle.internal.operations.BuildOperationContext;
import org.gradle.internal.operations.BuildOperationExecutor;
import org.gradle.internal.progress.BuildOperationState;
import org.gradle.internal.operations.CallableBuildOperation;
import org.gradle.internal.progress.BuildOperationDescriptor;
import org.gradle.internal.reflect.DirectInstantiator;
import org.gradle.internal.serialize.ExceptionReplacingObjectInputStream;
import org.gradle.internal.serialize.ExceptionReplacingObjectOutputStream;
import org.gradle.internal.work.WorkerLeaseRegistry;
import org.gradle.internal.work.WorkerLeaseRegistry.WorkerLease;
import org.gradle.util.GUtil;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.concurrent.Callable;
public class IsolatedClassloaderWorkerFactory implements WorkerFactory {
private final ClassLoaderFactory classLoaderFactory;
private final WorkerLeaseRegistry workerLeaseRegistry;
private final BuildOperationExecutor buildOperationExecutor;
private final GroovySystemLoaderFactory groovySystemLoaderFactory = new GroovySystemLoaderFactory();
public IsolatedClassloaderWorkerFactory(ClassLoaderFactory classLoaderFactory, WorkerLeaseRegistry workerLeaseRegistry, BuildOperationExecutor buildOperationExecutor) {
this.classLoaderFactory = classLoaderFactory;
this.workerLeaseRegistry = workerLeaseRegistry;
this.buildOperationExecutor = buildOperationExecutor;
}
@Override
public <T extends WorkSpec> Worker<T> getWorker(final Class<? extends WorkerProtocol<T>> workerImplementationClass, File workingDir, final DaemonForkOptions forkOptions) {
return new Worker<T>() {
@Override
public DefaultWorkResult execute(T spec) {
return execute(spec, workerLeaseRegistry.getCurrentWorkerLease(), buildOperationExecutor.getCurrentOperation());
}
@Override
public DefaultWorkResult execute(final T spec, WorkerLease parentWorkerWorkerLease, final BuildOperationState parentBuildOperation) {
WorkerLeaseRegistry.WorkerLeaseCompletion workerLease = parentWorkerWorkerLease.startChild();
try {
return buildOperationExecutor.call(new CallableBuildOperation<DefaultWorkResult>() {
@Override
public DefaultWorkResult call(BuildOperationContext context) {
return executeInWorkerClassLoader(workerImplementationClass, spec, forkOptions);
}
@Override
public BuildOperationDescriptor.Builder description() {
return BuildOperationDescriptor.displayName(spec.getDisplayName()).parent(parentBuildOperation);
}
});
} finally {
workerLease.leaseFinish();
}
}
};
}
private <T extends WorkSpec> DefaultWorkResult executeInWorkerClassLoader(Class<? extends WorkerProtocol<T>> workerImplementationClass, T spec, DaemonForkOptions forkOptions) {
ClassLoader actionClasspathLoader = createActionClasspathLoader(forkOptions);
GroovySystemLoader actionClasspathGroovy = groovySystemLoaderFactory.forClassLoader(actionClasspathLoader);
ClassLoader workerClassLoader = createWorkerClassLoader(actionClasspathLoader, forkOptions.getSharedPackages(), spec.getClass());
ClassLoader previousContextLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(workerClassLoader);
Callable<?> worker = transferWorkerIntoWorkerClassloader(workerImplementationClass, spec, workerClassLoader);
Object result = worker.call();
return transferResultFromWorkerClassLoader(result);
} catch (Exception e) {
throw UncheckedException.throwAsUncheckedException(e);
} finally {
// Eventually shutdown any leaky groovy runtime loaded from action classpath loader
actionClasspathGroovy.shutdown();
Thread.currentThread().setContextClassLoader(previousContextLoader);
}
}
private ClassLoader createActionClasspathLoader(DaemonForkOptions forkOptions) {
return classLoaderFactory.createIsolatedClassLoader(new DefaultClassPath(forkOptions.getClasspath()));
}
private ClassLoader createWorkerClassLoader(ClassLoader actionClasspathLoader, Iterable<String> sharedPackages, Class<?> actionClass) {
FilteringClassLoader.Spec actionFilterSpec = new FilteringClassLoader.Spec();
for (String packageName : sharedPackages) {
actionFilterSpec.allowPackage(packageName);
}
ClassLoader actionFilteredClasspathLoader = classLoaderFactory.createFilteringClassLoader(actionClasspathLoader, actionFilterSpec);
FilteringClassLoader.Spec gradleApiFilterSpec = new FilteringClassLoader.Spec();
// Logging
gradleApiFilterSpec.allowPackage("org.slf4j");
gradleApiFilterSpec.allowClass(Logger.class);
gradleApiFilterSpec.allowClass(LogLevel.class);
// Native
gradleApiFilterSpec.allowPackage("org.gradle.internal.nativeintegration");
gradleApiFilterSpec.allowPackage("org.gradle.internal.nativeplatform");
gradleApiFilterSpec.allowPackage("net.rubygrapefruit.platform");
// TODO:pm Add Gradle API and a way to opt out of it (for compiler workers)
ClassLoader gradleApiLoader = classLoaderFactory.createFilteringClassLoader(actionClass.getClassLoader(), gradleApiFilterSpec);
ClassLoader actionAndGradleApiLoader = new CachingClassLoader(new MultiParentClassLoader(gradleApiLoader, actionFilteredClasspathLoader));
return new VisitableURLClassLoader(actionAndGradleApiLoader, ClasspathUtil.getClasspath(actionClass.getClassLoader()));
}
private <T extends WorkSpec> Callable<?> transferWorkerIntoWorkerClassloader(Class<? extends WorkerProtocol<T>> workerImplementationClass, T spec, ClassLoader workerClassLoader) throws IOException, ClassNotFoundException {
byte[] serializedWorker = GUtil.serialize(new WorkerCallable<T>(workerImplementationClass, spec));
ObjectInputStream ois = new ClassLoaderObjectInputStream(new ByteArrayInputStream(serializedWorker), workerClassLoader);
return (Callable<?>) ois.readObject();
}
private DefaultWorkResult transferResultFromWorkerClassLoader(Object result) throws IOException, ClassNotFoundException {
ByteArrayOutputStream resultBytes = new ByteArrayOutputStream();
ObjectOutputStream oos = new ExceptionReplacingObjectOutputStream(resultBytes);
try {
oos.writeObject(result);
} finally {
oos.close();
}
ObjectInputStream ois = new ExceptionReplacingObjectInputStream(new ByteArrayInputStream(resultBytes.toByteArray()), getClass().getClassLoader());
return (DefaultWorkResult) ois.readObject();
}
private static class WorkerCallable<T extends WorkSpec> implements Callable<Object>, Serializable {
private final Class<? extends WorkerProtocol<T>> workerImplementationClass;
private final T spec;
private WorkerCallable(Class<? extends WorkerProtocol<T>> workerImplementationClass, T spec) {
this.workerImplementationClass = workerImplementationClass;
this.spec = spec;
}
@Override
public Object call() throws Exception {
return DirectInstantiator.INSTANCE.newInstance(workerImplementationClass).execute(spec);
}
}
}