com.google.firebase.internal.FirebaseScheduledExecutor Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of firebase-admin Show documentation

This is the official Firebase Admin Java SDK. Build extraordinary native JVM apps in minutes with Firebase. The Firebase platform can power your app’s backend, user authentication, static hosting, and more.

There is a newer version: 9.3.0

Show newest version

/*
 * 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();
  }
}