/*
* Copyright 2010 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.process.internal.child;
import org.gradle.api.Action;
import org.gradle.api.logging.LogLevel;
import org.gradle.internal.UncheckedException;
import org.gradle.internal.classloader.CachingClassLoader;
import org.gradle.internal.classloader.FilteringClassLoader;
import org.gradle.internal.classloader.MultiParentClassLoader;
import org.gradle.internal.classloader.MutableURLClassLoader;
import org.gradle.internal.io.ClassLoaderObjectInputStream;
import org.gradle.logging.LoggingManagerInternal;
import org.gradle.logging.LoggingServiceRegistry;
import org.gradle.util.*;
import java.io.ByteArrayInputStream;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.net.URL;
import java.util.Collection;
/**
* <p>A stage of the worker process start-up. Instantiated in the worker bootstrap ClassLoader and takes care of
* creating the implementation ClassLoader and executing the next stage of start-up in that ClassLoader. </p>
*/
public class ImplementationClassLoaderWorker implements Action<WorkerContext>, Serializable {
private final LogLevel logLevel;
private final Collection<String> sharedPackages;
private final Collection<URL> implementationClassPath;
private final byte[] serializedWorkerAction;
protected ImplementationClassLoaderWorker(LogLevel logLevel, Collection<String> sharedPackages,
Collection<URL> implementationClassPath,
Action<WorkerContext> workerAction) {
this.logLevel = logLevel;
this.sharedPackages = sharedPackages;
this.implementationClassPath = implementationClassPath;
serializedWorkerAction = GUtil.serialize(workerAction);
}
public void execute(WorkerContext workerContext) {
LoggingManagerInternal loggingManager = createLoggingManager();
loggingManager.setLevel(logLevel).start();
FilteringClassLoader filteredWorkerClassLoader = new FilteringClassLoader(getClass().getClassLoader());
filteredWorkerClassLoader.allowPackage("org.slf4j");
filteredWorkerClassLoader.allowClass(Action.class);
filteredWorkerClassLoader.allowClass(WorkerContext.class);
ClassLoader applicationClassLoader = workerContext.getApplicationClassLoader();
FilteringClassLoader filteredApplication = new FilteringClassLoader(applicationClassLoader);
MutableURLClassLoader implementationClassLoader = createImplementationClassLoader(filteredWorkerClassLoader,
filteredApplication);
// Configure classpaths
for (String sharedPackage : sharedPackages) {
filteredApplication.allowPackage(sharedPackage);
}
implementationClassLoader.addURLs(implementationClassPath);
// Deserialize the worker action
Action<WorkerContext> action;
try {
ObjectInputStream instr = new ClassLoaderObjectInputStream(new ByteArrayInputStream(serializedWorkerAction),
implementationClassLoader);
action = (Action<WorkerContext>) instr.readObject();
} catch (Exception e) {
throw UncheckedException.throwAsUncheckedException(e);
}
action.execute(workerContext);
}
LoggingManagerInternal createLoggingManager() {
return LoggingServiceRegistry.newProcessLogging().newInstance(LoggingManagerInternal.class);
}
MutableURLClassLoader createImplementationClassLoader(ClassLoader system, ClassLoader application) {
return new MutableURLClassLoader(new CachingClassLoader(new MultiParentClassLoader(application, system)));
}
}