/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.geronimo.microprofile.opentracing.common.microprofile.client;

import static java.util.Collections.emptyList;

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

public class SyncExecutor extends AbstractExecutorService {
    private volatile boolean shutdown;
    private final CountDownLatch latch = new CountDownLatch(1);

    @Override
    public void shutdown() {
        shutdown = true;
        latch.countDown();
    }

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

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

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

    @Override
    public boolean awaitTermination(final long timeout, final TimeUnit unit) {
        try {
            return latch.await(timeout, unit);
        } catch (final InterruptedException e) {
            return false;
        }
    }

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