| /* |
| * 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.giraph.utils; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.ThreadFactory; |
| |
| /** |
| * Utility class for thread related functions. |
| */ |
| public class ThreadUtils { |
| |
| /** |
| * Utility class. Do not inherit or create objects. |
| */ |
| private ThreadUtils() { } |
| |
| /** |
| * Creates new thread factory with specified thread name format. |
| * |
| * @param nameFormat defines naming format for threads created by |
| * thread factory |
| * @param exceptionHandler handles uncaught exceptions in all threads |
| * produced created thread factory |
| * @return new thread factory with specified thread name format and |
| * exception handler. |
| */ |
| public static ThreadFactory createThreadFactory( |
| String nameFormat, |
| Thread.UncaughtExceptionHandler exceptionHandler) { |
| ThreadFactoryBuilder builder = new ThreadFactoryBuilder(). |
| setNameFormat(nameFormat).setDaemon(true); |
| if (exceptionHandler != null) { |
| builder.setUncaughtExceptionHandler(exceptionHandler); |
| } |
| return builder.build(); |
| } |
| |
| /** |
| * Creates new thread factory with specified thread name format. |
| * |
| * @param nameFormat defines naming format for threads created by |
| * thread factory |
| * @return new thread factory with specified thread name format |
| */ |
| public static ThreadFactory createThreadFactory(String nameFormat) { |
| return createThreadFactory(nameFormat, null); |
| } |
| |
| /** |
| * Submit a callable to executor service, ensuring any exceptions are |
| * caught with provided exception handler. |
| * |
| * When using submit(), UncaughtExceptionHandler which is set on ThreadFactory |
| * isn't used, so we need this utility. |
| * |
| * @param executorService Executor service to submit callable to |
| * @param callable Callable to submit |
| * @param uncaughtExceptionHandler Handler for uncaught exceptions in callable |
| * @param <T> Type of callable result |
| * @return Future for callable |
| */ |
| public static <T> Future<T> submitToExecutor( |
| ExecutorService executorService, |
| Callable<T> callable, |
| Thread.UncaughtExceptionHandler uncaughtExceptionHandler) { |
| return executorService.submit( |
| new LogStacktraceCallable<>(callable, uncaughtExceptionHandler)); |
| } |
| } |