com.facebook.buck.util.concurrent.FakeListeningExecutorService.java Source code

Introduction

Here is the source code for com.facebook.buck.util.concurrent.FakeListeningExecutorService.java

Source

/*
 * Copyright 2013-present Facebook, 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.facebook.buck.util.concurrent;

import com.google.common.util.concurrent.AbstractListeningExecutorService;
import com.google.common.util.concurrent.ListeningExecutorService;

import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * Fake implementation of {@link ListeningExecutorService} that can be used for unit tests. In
 * particular, it is designed to capture whether {@link #shutdownNow()} was invoked.
 */
public class FakeListeningExecutorService extends AbstractListeningExecutorService {

    private boolean wasShutdownInvoked = false;
    private boolean wasShutdownNowInvoked = false;

    @Override
    public void shutdown() {
        wasShutdownInvoked = true;
    }

    @Override
    public List<Runnable> shutdownNow() {
        wasShutdownNowInvoked = true;
        return null;
    }

    /** @return {@code true} if this object's {@link #shutdownNow()} method was invoked. */
    public boolean wasShutdownNowInvoked() {
        return wasShutdownNowInvoked;
    }

    @Override
    public boolean isShutdown() {
        return wasShutdownInvoked || wasShutdownNowInvoked;
    }

    @Override
    public boolean isTerminated() {
        return wasShutdownInvoked || wasShutdownNowInvoked;
    }

    @Override
    public boolean awaitTermination(long timeout, TimeUnit unit) throws InterruptedException {
        return false;
    }

    /**
     * Because this is a fake, the specified {@link Runnable} is not actually executed (unless this
     * method is overridden).
     */
    @Override
    public void execute(Runnable command) {
    }

}