mappingservice/neutron/src/main/java/org/opendaylight/lispflowmapping/neutron/intenthandler/IntentHandlerAsyncExecutorProvider.java

   1 /*
   2  * Copyright (c) 2017 Cisco Systems, Inc.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.lispflowmapping.neutron.intenthandler;
   9
  10 import com.google.common.util.concurrent.ListeningExecutorService;
  11 import com.google.common.util.concurrent.MoreExecutors;
  12 import java.util.concurrent.Executors;
  13
  14 /**
  15  * Created by Shakib Ahmed on 1/24/17.
  16  */
  17 public final class IntentHandlerAsyncExecutorProvider {
  18     private static ListeningExecutorService listeningExecutorService;
  19
  20     private static final int EXTRA_THREADS_TO_HANDLE_VPP_LISTENER = 1;
  21
  22     private static IntentHandlerAsyncExecutorProvider intentHandlerAsyncExecutorProvider;
  23
  24     private IntentHandlerAsyncExecutorProvider() {
  25         listeningExecutorService = MoreExecutors
  26                 .listeningDecorator(Executors.newFixedThreadPool(EXTRA_THREADS_TO_HANDLE_VPP_LISTENER));
  27     }
  28
  29     public static synchronized IntentHandlerAsyncExecutorProvider getInstace() {
  30         if (intentHandlerAsyncExecutorProvider == null) {
  31             intentHandlerAsyncExecutorProvider = new IntentHandlerAsyncExecutorProvider();
  32         }
  33         return intentHandlerAsyncExecutorProvider;
  34     }
  35
  36     public synchronized ListeningExecutorService getExecutor() {
  37         return listeningExecutorService;
  38     }
  39
  40     public void close() {
  41         listeningExecutorService.shutdown();
  42     }
  43 }