// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.concurrent;

import java.util.Collections;
import java.util.List;
import java.util.concurrent.AbstractExecutorService;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.TimeUnit;

/**
 * {@link ExecutorService} implementation that runs all tasks in the calling thread. Useful for tests.
 *
 * @author jonmv
 */
public class InThreadExecutorService extends AbstractExecutorService {

    private boolean isShutdown = false;

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

    @Override
    public List<Runnable> shutdownNow() {
        shutdown();
        return Collections.emptyList();
    }

    @Override
    public boolean isShutdown() {
        return isShutdown;
    }

    @Override
    public boolean isTerminated() {
        return isShutdown;
    }

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

    @Override
    public void execute(Runnable command) {
        command.run();
    }

}