gerrit.onap Code Review - sdc.git/blob

   1 /*-
   2  * ============LICENSE_START=======================================================
   3  * SDC
   4  * ================================================================================
   5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
   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
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  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=========================================================
  19  */
  20
  21 package org.openecomp.sdc.be.components.distribution.engine;
  22
  23 import java.util.concurrent.ExecutorService;
  24 import java.util.concurrent.SynchronousQueue;
  25 import java.util.concurrent.ThreadFactory;
  26 import java.util.concurrent.ThreadPoolExecutor;
  27 import java.util.concurrent.TimeUnit;
  28
  29 import org.openecomp.sdc.be.config.DistributionEngineConfiguration.DistributionNotificationTopicConfig;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 import com.google.common.util.concurrent.ThreadFactoryBuilder;
  34
  35 public class NotificationExecutorService {
  36
  37         private static Logger logger = LoggerFactory.getLogger(NotificationExecutorService.class.getName());
  38
  39         public ExecutorService createExcecutorService(DistributionNotificationTopicConfig distributionNotificationTopic) {
  40
  41                 Integer minThreadPoolSize = distributionNotificationTopic.getMinThreadPoolSize();
  42                 if (minThreadPoolSize == null) {
  43                         minThreadPoolSize = 0;
  44                 }
  45
  46                 Integer maxThreadPoolSize = distributionNotificationTopic.getMaxThreadPoolSize();
  47                 if (maxThreadPoolSize == null) {
  48                         maxThreadPoolSize = 10;
  49                 }
  50
  51                 ThreadFactoryBuilder threadFactoryBuilder = new ThreadFactoryBuilder();
  52                 threadFactoryBuilder.setNameFormat("distribution-notification-thread-%d");
  53                 ThreadFactory threadFactory = threadFactoryBuilder.build();
  54
  55                 ExecutorService executorService = new ThreadPoolExecutor(minThreadPoolSize, maxThreadPoolSize, 60L, TimeUnit.SECONDS, new SynchronousQueue<Runnable>(), threadFactory);
  56
  57                 return executorService;
  58         }
  59
  60         public void shutdownAndAwaitTermination(ExecutorService pool, long maxTimeToWait) {
  61
  62                 logger.debug("shutdown NotificationExecutorService");
  63                 pool.shutdown(); // Disable new tasks from being submitted
  64                 try {
  65                         // Wait a while for existing tasks to terminate
  66                         if (!pool.awaitTermination(maxTimeToWait, TimeUnit.SECONDS)) {
  67                                 pool.shutdownNow(); // Cancel currently executing tasks
  68                                 // Wait a while for tasks to respond to being cancelled
  69                                 if (!pool.awaitTermination(maxTimeToWait, TimeUnit.SECONDS)) {
  70                                         logger.debug("Failed to close executor service");
  71                                 }
  72                         }
  73                 } catch (InterruptedException ie) {
  74                         // (Re-)Cancel if current thread also interrupted
  75                         pool.shutdownNow();
  76                         // Preserve interrupt status
  77                         Thread.currentThread().interrupt();
  78                 }
  79         }
  80
  81 }