org.apache.dubbo.common.utils.ExecutorUtil Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo Show documentation
Show all versions of dubbo Show documentation
The all in one project of dubbo
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.dubbo.common.utils;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.logger.ErrorTypeAwareLogger;
import org.apache.dubbo.common.logger.LoggerFactory;
import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import static org.apache.dubbo.common.constants.CommonConstants.THREAD_NAME_KEY;
import static org.apache.dubbo.common.constants.LoggerCodeConstants.COMMON_UNEXPECTED_EXECUTORS_SHUTDOWN;
public class ExecutorUtil {
private static final ErrorTypeAwareLogger logger = LoggerFactory.getErrorTypeAwareLogger(ExecutorUtil.class);
private static final ThreadPoolExecutor SHUTDOWN_EXECUTOR = new ThreadPoolExecutor(0, 1,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue(100),
new NamedThreadFactory("Close-ExecutorService-Timer", true));
public static boolean isTerminated(Executor executor) {
if (executor instanceof ExecutorService) {
if (((ExecutorService) executor).isTerminated()) {
return true;
}
}
return false;
}
/**
* Use the shutdown pattern from:
* https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html
*
* @param executor the Executor to shutdown
* @param timeout the timeout in milliseconds before termination
*/
public static void gracefulShutdown(Executor executor, int timeout) {
if (!(executor instanceof ExecutorService) || isTerminated(executor)) {
return;
}
final ExecutorService es = (ExecutorService) executor;
try {
// Disable new tasks from being submitted
es.shutdown();
} catch (SecurityException | NullPointerException ex2) {
return;
}
try {
// Wait a while for existing tasks to terminate
if (!es.awaitTermination(timeout, TimeUnit.MILLISECONDS)) {
es.shutdownNow();
}
} catch (InterruptedException ex) {
es.shutdownNow();
Thread.currentThread().interrupt();
}
if (!isTerminated(es)) {
newThreadToCloseExecutor(es);
}
}
public static void shutdownNow(Executor executor, final int timeout) {
if (!(executor instanceof ExecutorService) || isTerminated(executor)) {
return;
}
final ExecutorService es = (ExecutorService) executor;
try {
es.shutdownNow();
} catch (SecurityException | NullPointerException ex2) {
return;
}
try {
es.awaitTermination(timeout, TimeUnit.MILLISECONDS);
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
if (!isTerminated(es)) {
newThreadToCloseExecutor(es);
}
}
private static void newThreadToCloseExecutor(final ExecutorService es) {
if (!isTerminated(es)) {
SHUTDOWN_EXECUTOR.execute(() -> {
try {
for (int i = 0; i < 1000; i++) {
es.shutdownNow();
if (es.awaitTermination(10, TimeUnit.MILLISECONDS)) {
break;
}
}
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
} catch (Throwable e) {
logger.warn(COMMON_UNEXPECTED_EXECUTORS_SHUTDOWN, "", "", e.getMessage(), e);
}
});
}
}
/**
* append thread name with url address
*
* @return new url with updated thread name
*/
public static URL setThreadName(URL url, String defaultName) {
String name = url.getParameter(THREAD_NAME_KEY, defaultName);
name = name + "-" + url.getAddress();
url = url.addParameter(THREAD_NAME_KEY, name);
return url;
}
public static void cancelScheduledFuture(ScheduledFuture scheduledFuture) {
ScheduledFuture future = scheduledFuture;
if (future != null && !future.isCancelled()) {
future.cancel(true);
}
}
}