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
  41     // attributes
  42     @Override
  43     public void setThreadCount(int threadCount) {
  44         this.threadCount = threadCount;
  45     }
  46
  47     @Override
  48     public int getThreadCount() {
  49         return threadCount;
  50     }
  51
  52     @Override
  53     public boolean isTriggerNewInstanceCreation() {
  54         return triggerNewInstanceCreation;
  55     }
  56
  57     @Override
  58     public void setTriggerNewInstanceCreation(boolean triggerNewInstanceCreation) {
  59         this.triggerNewInstanceCreation = triggerNewInstanceCreation;
  60     }
  61
  62     // operations
  63
  64     private boolean isReusable() {
  65         return oldInstance != null;
  66     }
  67
  68     @Override
  69     public void validate() {
  70         checkState(threadCount > 0,
  71                 "Parameter 'threadCount' must be greater than 0");
  72     }
  73
  74     @Override
  75     public Closeable getInstance() {
  76         if (instance == null) {
  77             if (isReusable() && triggerNewInstanceCreation == false) { // simulate
  78                                                                        // big
  79                                                                        // change
  80                                                                        // using
  81                                                                        // triggerNewInstanceCreation
  82                 oldInstance.setMaximumNumberOfThreads(threadCount);
  83                 instance = oldInstance;
  84             } else {
  85                 if (oldCloseable != null) {
  86                     try {
  87                         oldCloseable.close();
  88                     } catch (Exception e) {
  89                         throw new RuntimeException(e);
  90                     }
  91                 }
  92                 instance = new TestingFixedThreadPool(threadCount,
  93                         name.toString());
  94             }
  95         }
  96         return instance;
  97     }
  98
  99     @Override
 100     public ModuleIdentifier getIdentifier() {
 101         return name;
 102     }
 103
 104 }