com.topekalabs.threads.ThreadUtils.java Source code

Introduction

Here is the source code for com.topekalabs.threads.ThreadUtils.java

Source

/*
 * Copyright 2015 Topeka Labs.
 *
 * 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.topekalabs.threads;

import com.google.common.base.Stopwatch;
import com.topekalabs.collection.utils.ListUtils;
import java.util.Collection;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

/**
 *
 * @author Topeka Labs
 */
public class ThreadUtils {
    private static final TimeUnit MILLIS_UNIT = TimeUnit.MILLISECONDS;

    private ThreadUtils() {
        //Do nothing
    }

    public static <T> void done(List<Future<T>> futures, long timeout, TimeUnit timeUnit)
            throws TimeoutException, InterruptedException, ExecutionException {
        done(ListUtils.listToCollection(futures), timeout, timeUnit);
    }

    public static <T> void done(Collection<Future<T>> futures)
            throws TimeoutException, InterruptedException, ExecutionException {
        for (Future<?> future : futures) {
            future.get();
        }
    }

    public static <T> void done(Collection<Future<T>> futures, long timeout, TimeUnit timeUnit)
            throws TimeoutException, InterruptedException, ExecutionException {
        long milliTimeout = MILLIS_UNIT.convert(timeout, timeUnit);
        long currentTimeout = milliTimeout;

        Stopwatch sw = Stopwatch.createUnstarted();

        for (Future<?> future : futures) {
            sw.start();
            future.get(currentTimeout, MILLIS_UNIT);
            sw.stop();

            long elapsed = sw.elapsed(MILLIS_UNIT);

            if (elapsed > milliTimeout) {
                throw new TimeoutException("Exceeded timeout of " + milliTimeout + " milliseconds.");
            }

            currentTimeout = milliTimeout - elapsed;
        }
    }
}