2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright 2018 TechMahindra
6 *=================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 package org.onap.universalvesadapter.utils;
22 import java.util.ArrayList;
23 import java.util.Collection;
24 import java.util.concurrent.CountDownLatch;
25 import java.util.concurrent.ExecutorService;
26 import java.util.concurrent.Executors;
30 * Utility class to execute parallel tasks
35 public class ParallelTasks
37 private final Collection<Runnable> tasks = new ArrayList<Runnable>();
39 public ParallelTasks()
45 * Add task to be executed in parallel
49 public void add(final Runnable task)
55 * starts all the added tasks in parallel
57 * @throws InterruptedException
59 public void startParallelTasks() throws InterruptedException
61 final ExecutorService threads = Executors.newFixedThreadPool(Runtime.getRuntime()
62 .availableProcessors());
65 final CountDownLatch latch = new CountDownLatch(tasks.size());
66 for (final Runnable task : tasks)
67 threads.execute(new Runnable() {