opendaylight/config/config-manager/src/test/java/org/opendaylight/controller/config/manager/testingservices/threadpool/TestingFixedThreadPoolModule.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  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.controller.config.manager.testingservices.threadpool;
   9
  10 import static com.google.common.base.Preconditions.checkState;
  11
  12 import java.io.Closeable;
  13
  14 import javax.annotation.Nullable;
  15 import javax.annotation.concurrent.NotThreadSafe;
  16
  17 import org.opendaylight.controller.config.api.ModuleIdentifier;
  18 import org.opendaylight.controller.config.manager.testingservices.seviceinterface.ModifiableThreadPoolServiceInterface;
  19 import org.opendaylight.controller.config.spi.Module;
  20
  21 @NotThreadSafe
  22 public class TestingFixedThreadPoolModule implements
  23         TestingFixedThreadPoolConfigMXBean, Module,
  24         TestingThreadPoolConfigMXBean, ModifiableThreadPoolServiceInterface {
  25     private final AutoCloseable oldCloseable;
  26     private final TestingFixedThreadPool oldInstance;
  27     private final ModuleIdentifier name;
  28     private TestingFixedThreadPool instance;
  29     private int threadCount = 0;
  30     private boolean triggerNewInstanceCreation;
  31
  32     TestingFixedThreadPoolModule(ModuleIdentifier name,
  33             @Nullable AutoCloseable oldCloseable,
  34             @Nullable TestingFixedThreadPool oldInstance) {
  35         this.name = name;
  36         this.oldCloseable = oldCloseable;
  37         this.oldInstance = oldInstance;
  38     }
  39
  40     @Override
  41     public ModuleIdentifier getName() {
  42         return name;
  43     }
  44
  45     // attributes
  46     @Override
  47     public void setThreadCount(int threadCount) {
  48         this.threadCount = threadCount;
  49     }
  50
  51     @Override
  52     public int getThreadCount() {
  53         return threadCount;
  54     }
  55
  56     @Override
  57     public boolean isTriggerNewInstanceCreation() {
  58         return triggerNewInstanceCreation;
  59     }
  60
  61     @Override
  62     public void setTriggerNewInstanceCreation(boolean triggerNewInstanceCreation) {
  63         this.triggerNewInstanceCreation = triggerNewInstanceCreation;
  64     }
  65
  66     // operations
  67
  68     private boolean isReusable() {
  69         return oldInstance != null;
  70     }
  71
  72     @Override
  73     public void validate() {
  74         checkState(threadCount > 0,
  75                 "Parameter 'threadCount' must be greater than 0");
  76     }
  77
  78     @Override
  79     public Closeable getInstance() {
  80         if (instance == null) {
  81             if (isReusable() && triggerNewInstanceCreation == false) { // simulate
  82                                                                        // big
  83                                                                        // change
  84                                                                        // using
  85                                                                        // triggerNewInstanceCreation
  86                 oldInstance.setMaximumNumberOfThreads(threadCount);
  87                 instance = oldInstance;
  88             } else {
  89                 if (oldCloseable != null) {
  90                     try {
  91                         oldCloseable.close();
  92                     } catch (Exception e) {
  93                         throw new RuntimeException(e);
  94                     }
  95                 }
  96                 instance = new TestingFixedThreadPool(threadCount,
  97                         name.toString());
  98             }
  99         }
 100         return instance;
 101     }
 102
 103 }