alpha/alpha-core/src/main/java/org/apache/servicecomb/pack/alpha/core/PendingTaskRunner.java

/*
 * 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.servicecomb.pack.alpha.core;

import static java.util.concurrent.TimeUnit.MILLISECONDS;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class PendingTaskRunner {
  private final BlockingQueue<Runnable> pendingTasks;
  private final int delay;

  public PendingTaskRunner(BlockingQueue<Runnable> pendingTasks, int delay) {
    this.pendingTasks = pendingTasks;
    this.delay = delay;
  }

  public Future<?> run() {
    return Executors.newSingleThreadScheduledExecutor()
        .scheduleWithFixedDelay(() -> {
          try {
            pendingTasks.take().run();
          } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
          }
        }, 0, delay, MILLISECONDS);
  }
}