Java tutorial
/* * Copyright 2018 Google Inc. * * 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 com.google.firebase.internal; import static com.google.common.base.Preconditions.checkArgument; import com.google.common.base.Strings; import com.google.common.util.concurrent.ThreadFactoryBuilder; import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.ThreadFactory; /** * A single-threaded scheduled executor implementation. Allows naming the threads, and spawns * new threads as daemons. */ public class FirebaseScheduledExecutor extends ScheduledThreadPoolExecutor { public FirebaseScheduledExecutor(@NonNull ThreadFactory threadFactory, @NonNull String name) { this(threadFactory, name, null); } public FirebaseScheduledExecutor(@NonNull ThreadFactory threadFactory, @NonNull String name, @Nullable Thread.UncaughtExceptionHandler handler) { super(1, decorateThreadFactory(threadFactory, name, handler)); setRemoveOnCancelPolicy(true); } static ThreadFactory getThreadFactoryWithName(@NonNull ThreadFactory threadFactory, @NonNull String name) { return decorateThreadFactory(threadFactory, name, null); } private static ThreadFactory decorateThreadFactory(ThreadFactory threadFactory, String name, Thread.UncaughtExceptionHandler handler) { checkArgument(!Strings.isNullOrEmpty(name)); ThreadFactoryBuilder builder = new ThreadFactoryBuilder().setThreadFactory(threadFactory) .setNameFormat(name).setDaemon(true); if (handler != null) { builder.setUncaughtExceptionHandler(handler); } return builder.build(); } }