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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) [2016-2021] Payara Foundation and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://github.com/payara/Payara/blob/master/LICENSE.txt
* See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* The Payara Foundation designates this particular file as subject to the "Classpath"
* exception as provided by the Payara Foundation in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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package org.glassfish.weld.services;
import com.sun.enterprise.util.Utility;
import java.util.Collection;
import java.util.List;
import java.util.ArrayList;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import jakarta.enterprise.concurrent.ManagedExecutorService;
import jakarta.enterprise.concurrent.ManagedScheduledExecutorService;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.internal.api.Globals;
import org.jboss.weld.executor.AbstractExecutorServices;
import org.jboss.weld.manager.api.ExecutorServices;
/**
* Implementation of the Weld Executor Services SPI which uses the Payara Executor
* Service for its
* @author steve
*/
public class ExecutorServicesImpl extends AbstractExecutorServices implements ExecutorServices {
private final ExecutorService taskExecutor;
private final ContextualTimerExecutor timerExecutor;
private final ManagedExecutorService executor;
private final org.glassfish.concurrent.config.ManagedExecutorService config;
private static final String DEFAULT_MANAGED_SCHEDULED_EXECUTOR_SERVICE = "java:comp/DefaultManagedScheduledExecutorService";
private static final String DEFAULT_MANAGED_EXECUTOR_SERVICE = "java:comp/DefaultManagedExecutorService";
private static final String DEFAULT_MANAGED_EXECUTOR_SERVICE_PHYS = "concurrent/__defaultManagedExecutorService";
public ExecutorServicesImpl() throws NamingException {
InitialContext ctx = new InitialContext();
executor = (ManagedExecutorService) ctx.lookup(DEFAULT_MANAGED_EXECUTOR_SERVICE);
taskExecutor = new ContextualTaskExecutor();
timerExecutor = new ContextualTimerExecutor();
this.config = getManagedExecutorServiceConfig(DEFAULT_MANAGED_EXECUTOR_SERVICE_PHYS);
}
@Override
public ExecutorService getTaskExecutor() {
return taskExecutor;
}
@Override
public ScheduledExecutorService getTimerExecutor() {
return timerExecutor;
}
@Override
public void cleanup() {
}
@Override
protected int getThreadPoolSize() {
return Integer.parseInt(this.config.getMaximumPoolSize());
}
@Override
public Collection> wrap(Collection> tasks) {
// needs to set the context classloader based on the current context classloader and then reset it back
ClassLoader TCCL = Thread.currentThread().getContextClassLoader();
List> wrapped = new ArrayList<>(tasks.size());
for (Callable task : tasks) {
wrapped.add(inContextClassloader(TCCL, task));
}
return wrapped;
}
private static Callable inContextClassloader(ClassLoader contextClassLoader, Callable task) {
return () -> {
ClassLoader old = Utility.setContextClassLoader(contextClassLoader);
try {
return task.call();
} finally {
Utility.setContextClassLoader(old);
}
};
}
private static Runnable inContextClassloader(ClassLoader contextClassLoader, Runnable task) {
return () -> {
ClassLoader old = Utility.setContextClassLoader(contextClassLoader);
try {
task.run();
} finally {
Utility.setContextClassLoader(old);
}
};
}
private static Callable inCurrentContextClassloader(Callable task) {
return inContextClassloader(Thread.currentThread().getContextClassLoader(), task);
}
private static Runnable inCurrentContextClassloader(Runnable task) {
return inContextClassloader(Thread.currentThread().getContextClassLoader(), task);
}
class ContextualTaskExecutor implements ExecutorService {
private final ExecutorService delegate;
ContextualTaskExecutor() {
this.delegate = executor;
}
@Override
public void shutdown() {
throw new IllegalStateException("Downstream service cannot request shutdown");
}
@Override
public List shutdownNow() {
throw new IllegalStateException("Downstream service cannot request shutdown");
}
@Override
public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
return delegate().awaitTermination(timeout, unit);
}
@Override
public boolean isShutdown() {
return delegate().isShutdown();
}
@Override
public boolean isTerminated() {
return delegate().isTerminated();
}
@Override
public Future submit(Callable task) {
return delegate().submit(inCurrentContextClassloader(task));
}
@Override
public Future submit(Runnable task, T result) {
return delegate().submit(inCurrentContextClassloader(task), result);
}
@Override
public Future submit(Runnable task) {
return delegate().submit(inCurrentContextClassloader(task));
}
@Override
public List> invokeAll(Collection> tasks) throws InterruptedException {
return delegate().invokeAll(wrap(tasks));
}
@Override
public List> invokeAll(Collection> tasks, long timeout, TimeUnit unit) throws InterruptedException {
return delegate().invokeAll(wrap(tasks), timeout, unit);
}
@Override
public T invokeAny(Collection> tasks) throws InterruptedException, ExecutionException {
return delegate().invokeAny(wrap(tasks));
}
@Override
public T invokeAny(Collection> tasks, long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
return delegate().invokeAny(wrap(tasks), timeout, unit);
}
@Override
public void execute(Runnable command) {
delegate().execute(inCurrentContextClassloader(command));
}
protected ExecutorService delegate() {
return delegate;
}
}
class ContextualTimerExecutor extends ContextualTaskExecutor implements ScheduledExecutorService {
private final ScheduledExecutorService delegate;
ContextualTimerExecutor() throws NamingException {
InitialContext ctx = new InitialContext();
this.delegate = (ManagedScheduledExecutorService) ctx.lookup(DEFAULT_MANAGED_SCHEDULED_EXECUTOR_SERVICE);
}
@Override
protected ScheduledExecutorService delegate() {
return this.delegate;
}
@Override
public ScheduledFuture schedule(Runnable command, long delay, TimeUnit unit) {
return delegate().schedule(inCurrentContextClassloader(command), delay, unit);
}
@Override
public ScheduledFuture schedule(Callable callable, long delay, TimeUnit unit) {
return delegate().schedule(inCurrentContextClassloader(callable), delay, unit);
}
@Override
public ScheduledFuture scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) {
return delegate().scheduleAtFixedRate(inCurrentContextClassloader(command), initialDelay, period, unit);
}
@Override
public ScheduledFuture scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) {
return delegate().scheduleWithFixedDelay(inCurrentContextClassloader(command), initialDelay, delay, unit);
}
}
private org.glassfish.concurrent.config.ManagedExecutorService getManagedExecutorServiceConfig(String jndiName) {
for (org.glassfish.concurrent.config.ManagedExecutorService service : Globals.getDefaultHabitat()
.getAllServices(org.glassfish.concurrent.config.ManagedExecutorService.class)) {
if(service.getJndiName().equals(jndiName)) {
return service;
}
}
throw new IllegalStateException(jndiName + " executor service config not found.");
}
}