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/*
* Copyright 2017 Async-IO.org
*
* 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.atmosphere.util;
import org.atmosphere.cpr.ApplicationConfig;
import org.atmosphere.cpr.AtmosphereConfig;
import com.vaadin.external.org.slf4j.Logger;
import com.vaadin.external.org.slf4j.LoggerFactory;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import static org.atmosphere.cpr.ApplicationConfig.USE_FORJOINPOOL;
/**
* Stateless Factory to create {@link ExecutorService} used in all Atmosphere Component. By default they are
* shared amongst all component. To change the behavior, add {@link ApplicationConfig#BROADCASTER_SHARABLE_THREAD_POOLS}
*
* @author Jeanfrancois Arcand
*/
public class ExecutorsFactory {
private final static Logger logger = LoggerFactory.getLogger(ExecutorsFactory.class);
public final static int DEFAULT_ASYNC_THREAD = 200;
public final static int DEFAULT_MESSAGE_THREAD = -1;
public final static int DEFAULT_KEEP_ALIVE = 30;
public final static String ASYNC_WRITE_THREAD_POOL = "asyncWriteService";
public final static String SCHEDULER_THREAD_POOL = "scheduler";
public final static String BROADCASTER_THREAD_POOL = "executorService";
public final static class AtmosphereThreadFactory implements ThreadFactory {
private final AtomicInteger count = new AtomicInteger();
private final boolean shared;
private final String name;
public AtmosphereThreadFactory(boolean shared, String name) {
this.shared = shared;
this.name = name;
}
@Override
public Thread newThread(final Runnable runnable) {
Thread t = new Thread(runnable, (shared ? "Atmosphere-Shared-" : name) + count.getAndIncrement());
t.setDaemon(true);
return t;
}
}
/**
* Create an {@link ExecutorService} to be used for dispatching messages, not I/O events.
*
* @param config the {@link AtmosphereConfig}
* @param name a name to use if shared is false.
* @return {@link ExecutorService}
*/
public static ExecutorService getMessageDispatcher(final AtmosphereConfig config, final String name) {
final boolean shared = config.framework().isShareExecutorServices();
boolean useForkJoinPool = config.getInitParameter(USE_FORJOINPOOL, true);
if (!shared || config.properties().get(BROADCASTER_THREAD_POOL) == null) {
int numberOfMessageProcessingThread = DEFAULT_MESSAGE_THREAD;
String s = config.getInitParameter(ApplicationConfig.BROADCASTER_MESSAGE_PROCESSING_THREADPOOL_MAXSIZE);
if (s != null) {
numberOfMessageProcessingThread = Integer.parseInt(s);
}
if (shared && numberOfMessageProcessingThread == 1) {
logger.warn("Not enough numberOfMessageProcessingThread for a shareable thread pool {}, " +
"Setting it to a newCachedThreadPool", numberOfMessageProcessingThread);
numberOfMessageProcessingThread = -1;
}
AbstractExecutorService messageService;
logger.trace("Max number of DispatchOp {}", numberOfMessageProcessingThread == -1 ? "Unlimited" : numberOfMessageProcessingThread);
String threadName = name + "-DispatchOp-";
if (numberOfMessageProcessingThread == -1) {
messageService = !useForkJoinPool ? (ThreadPoolExecutor) Executors.newCachedThreadPool(new AtmosphereThreadFactory(shared, threadName))
: new ForkJoinPool(shared, threadName);
} else {
messageService = (ThreadPoolExecutor) Executors.newFixedThreadPool(numberOfMessageProcessingThread,
new AtmosphereThreadFactory(shared, threadName));
}
keepAliveThreads(messageService, config);
if (shared) {
config.properties().put(BROADCASTER_THREAD_POOL, messageService);
}
return messageService;
} else {
return (ExecutorService) config.properties().get(BROADCASTER_THREAD_POOL);
}
}
private static void keepAliveThreads(AbstractExecutorService t, AtmosphereConfig config) {
if (!ThreadPoolExecutor.class.isAssignableFrom(t.getClass())) {
return;
}
ThreadPoolExecutor e = ThreadPoolExecutor.class.cast(t);
int keepAlive = DEFAULT_KEEP_ALIVE;
String s = config.getInitParameter(ApplicationConfig.EXECUTORFACTORY_KEEP_ALIVE);
if (s != null) {
keepAlive = Integer.parseInt(s);
}
e.setKeepAliveTime(keepAlive, TimeUnit.SECONDS);
e.allowCoreThreadTimeOut(config.getInitParameter(ApplicationConfig.ALLOW_CORE_THREAD_TIMEOUT, true));
}
/**
* Create an {@link ExecutorService} to be used for dispatching I/O events.
*
* @param config the {@link AtmosphereConfig}
* @param name a name to use if shared is false.
* @return {@link ExecutorService}
*/
public static ExecutorService getAsyncOperationExecutor(final AtmosphereConfig config, final String name) {
final boolean shared = config.framework().isShareExecutorServices();
if (!shared || config.properties().get(ASYNC_WRITE_THREAD_POOL) == null) {
int numberOfAsyncThread = DEFAULT_ASYNC_THREAD;
String s = config.getInitParameter(ApplicationConfig.BROADCASTER_ASYNC_WRITE_THREADPOOL_MAXSIZE);
if (s != null) {
numberOfAsyncThread = Integer.parseInt(s);
}
if (shared && numberOfAsyncThread == 1) {
logger.warn("Not enough numberOfAsyncThread for a shareable thread pool {}, " +
"Setting it to a newCachedThreadPool", numberOfAsyncThread);
numberOfAsyncThread = -1;
}
AbstractExecutorService asyncWriteService;
boolean useForkJoinPool = config.getInitParameter(USE_FORJOINPOOL, true);
logger.trace("Max number of AsyncOp {}", numberOfAsyncThread == -1 ? "Unlimited" : numberOfAsyncThread);
String threadName = name + "-AsyncOp-";
if (numberOfAsyncThread == -1) {
asyncWriteService = !useForkJoinPool ? (ThreadPoolExecutor) Executors.newCachedThreadPool(new AtmosphereThreadFactory(shared, threadName))
: new ForkJoinPool(shared, threadName);
} else {
asyncWriteService = (ThreadPoolExecutor) Executors.newFixedThreadPool(numberOfAsyncThread,
new AtmosphereThreadFactory(shared, threadName));
}
keepAliveThreads(asyncWriteService, config);
if (shared) {
config.properties().put(ASYNC_WRITE_THREAD_POOL, asyncWriteService);
}
return asyncWriteService;
} else {
return (ExecutorService) config.properties().get(ASYNC_WRITE_THREAD_POOL);
}
}
/**
* Create a {@link ScheduledExecutorService} used ot schedule I/O and non I/O events.
*
* @param config the {@link AtmosphereConfig}
* @return {@link ScheduledExecutorService}
*/
public static ScheduledExecutorService getScheduler(final AtmosphereConfig config) {
final boolean shared = config.framework().isShareExecutorServices();
if (!shared || config.properties().get(SCHEDULER_THREAD_POOL) == null) {
int threads = config.getInitParameter(ApplicationConfig.SCHEDULER_THREADPOOL_MAXSIZE, Runtime.getRuntime().availableProcessors());
logger.trace("Max number of Atmosphere-Scheduler {}", threads);
ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(threads, new ThreadFactory() {
private final AtomicInteger count = new AtomicInteger();
@Override
public Thread newThread(final Runnable runnable) {
Thread t = new Thread(runnable, "Atmosphere-Scheduler-" + count.getAndIncrement());
t.setDaemon(true);
return t;
}
});
if (shared) {
config.properties().put(SCHEDULER_THREAD_POOL, scheduler);
}
keepAliveThreads((ThreadPoolExecutor) scheduler, config);
return scheduler;
} else {
return (ScheduledExecutorService) config.properties().get(SCHEDULER_THREAD_POOL);
}
}
public final static void reset(AtmosphereConfig config) {
ExecutorService e = (ExecutorService) config.properties().get(ASYNC_WRITE_THREAD_POOL);
if (e != null) {
e.shutdown();
}
config.properties().remove(ASYNC_WRITE_THREAD_POOL);
e = (ExecutorService) config.properties().get(SCHEDULER_THREAD_POOL);
if (e != null) {
e.shutdown();
}
config.properties().remove(SCHEDULER_THREAD_POOL);
e = (ExecutorService) config.properties().get(BROADCASTER_THREAD_POOL);
if (e != null) {
e.shutdown();
}
config.properties().remove(BROADCASTER_THREAD_POOL);
}
}
