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 import javax.annotation.Nullable;
  14 import javax.annotation.concurrent.NotThreadSafe;
  15 import org.opendaylight.controller.config.api.ModuleIdentifier;
  16 import org.opendaylight.controller.config.manager.testingservices.seviceinterface.ModifiableThreadPoolServiceInterface;
  17 import org.opendaylight.controller.config.spi.Module;
  18
  19 @NotThreadSafe
  20 public class TestingFixedThreadPoolModule implements
  21         TestingFixedThreadPoolConfigMXBean, Module,
  22         TestingThreadPoolConfigMXBean, ModifiableThreadPoolServiceInterface {
  23     private final AutoCloseable oldCloseable;
  24     private final TestingFixedThreadPool oldInstance;
  25     private final ModuleIdentifier name;
  26     private TestingFixedThreadPool instance;
  27     private int threadCount = 0;
  28     private boolean triggerNewInstanceCreation;
  29
  30     TestingFixedThreadPoolModule(final ModuleIdentifier name,
  31             @Nullable final AutoCloseable oldCloseable,
  32             @Nullable final TestingFixedThreadPool oldInstance) {
  33         this.name = name;
  34         this.oldCloseable = oldCloseable;
  35         this.oldInstance = oldInstance;
  36     }
  37
  38
  39     // attributes
  40     @Override
  41     public void setThreadCount(final int threadCount) {
  42         this.threadCount = threadCount;
  43     }
  44
  45     @Override
  46     public int getThreadCount() {
  47         return threadCount;
  48     }
  49
  50     @Override
  51     public boolean isTriggerNewInstanceCreation() {
  52         return triggerNewInstanceCreation;
  53     }
  54
  55     @Override
  56     public void setTriggerNewInstanceCreation(final boolean triggerNewInstanceCreation) {
  57         this.triggerNewInstanceCreation = triggerNewInstanceCreation;
  58     }
  59
  60     // operations
  61
  62     private boolean isReusable() {
  63         return oldInstance != null;
  64     }
  65
  66     @Override
  67     public void validate() {
  68         checkState(threadCount > 0,
  69                 "Parameter 'threadCount' must be greater than 0");
  70     }
  71
  72     @Override
  73     public boolean canReuse(final Module oldModule) {
  74         return isReusable() && triggerNewInstanceCreation == false;
  75     }
  76
  77     @Override
  78     public Closeable getInstance() {
  79         if (instance == null) {
  80             if (isReusable() && triggerNewInstanceCreation == false) { // simulate
  81                                                                        // big
  82                                                                        // change
  83                                                                        // using
  84                                                                        // triggerNewInstanceCreation
  85                 oldInstance.setMaximumNumberOfThreads(threadCount);
  86                 instance = oldInstance;
  87             } else {
  88                 if (oldCloseable != null) {
  89                     try {
  90                         oldCloseable.close();
  91                     } catch (final Exception e) {
  92                         throw new RuntimeException(e);
  93                     }
  94                 }
  95                 instance = new TestingFixedThreadPool(threadCount,
  96                         name.toString());
  97             }
  98         }
  99         return instance;
 100     }
 101
 102     @Override
 103     public ModuleIdentifier getIdentifier() {
 104         return name;
 105     }
 106
 107 }