opendaylight/config/config-manager/src/test/java/org/opendaylight/controller/config/manager/testingservices/parallelapsp/TestingParallelAPSPModule.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.parallelapsp;
   9
  10 import static com.google.common.base.Preconditions.checkNotNull;
  11 import static com.google.common.base.Preconditions.checkState;
  12
  13 import java.io.Closeable;
  14
  15 import javax.annotation.Nullable;
  16 import javax.annotation.concurrent.NotThreadSafe;
  17 import javax.management.ObjectName;
  18
  19 import org.opendaylight.controller.config.api.DependencyResolver;
  20 import org.opendaylight.controller.config.api.JmxAttribute;
  21 import org.opendaylight.controller.config.api.ModuleIdentifier;
  22 import org.opendaylight.controller.config.api.annotations.RequireInterface;
  23 import org.opendaylight.controller.config.manager.testingservices.seviceinterface.TestingThreadPoolServiceInterface;
  24 import org.opendaylight.controller.config.manager.testingservices.threadpool.TestingThreadPoolIfc;
  25 import org.opendaylight.controller.config.spi.Module;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import com.google.common.base.Strings;
  30
  31 /**
  32  * Represents service that has dependency to thread pool.
  33  */
  34 @NotThreadSafe
  35 public class TestingParallelAPSPModule implements Module,
  36         TestingParallelAPSPConfigMXBean {
  37     private static final Logger logger = LoggerFactory
  38             .getLogger(TestingParallelAPSPModule.class);
  39
  40     private final DependencyResolver dependencyResolver;
  41     private final AutoCloseable oldCloseable;
  42     private final TestingParallelAPSPImpl oldInstance;
  43     private final ModuleIdentifier name;
  44     private ObjectName threadPoolON;
  45     private TestingParallelAPSPImpl instance;
  46     private String someParam;
  47
  48     public TestingParallelAPSPModule(ModuleIdentifier name,
  49             DependencyResolver dependencyResolver,
  50             @Nullable AutoCloseable oldCloseable,
  51             @Nullable TestingParallelAPSPImpl oldInstance) {
  52         this.name = name;
  53         this.dependencyResolver = dependencyResolver;
  54         this.oldCloseable = oldCloseable;
  55         this.oldInstance = oldInstance;
  56     }
  57
  58     @Override
  59     public ModuleIdentifier getName() {
  60         return name;
  61     }
  62
  63     @Override
  64     public ObjectName getThreadPool() {
  65         return threadPoolON;
  66     }
  67
  68     @RequireInterface(TestingThreadPoolServiceInterface.class)
  69     @Override
  70     public void setThreadPool(ObjectName threadPoolName) {
  71         this.threadPoolON = threadPoolName;
  72     }
  73
  74     @Override
  75     public String getSomeParam() {
  76         return someParam;
  77     }
  78
  79     @Override
  80     public void setSomeParam(String someParam) {
  81         this.someParam = someParam;
  82     }
  83
  84     @Override
  85     public Integer getMaxNumberOfThreads() {
  86         if (instance == null)
  87             return null;
  88         return instance.getMaxNumberOfThreads();
  89     }
  90
  91     // this would be generated:
  92     private final JmxAttribute threadPoolONJMXAttribute = new JmxAttribute("threadPoolON");
  93
  94     @Override
  95     public void validate() {
  96         checkNotNull(threadPoolON, "Parameter 'threadPool' must be set");
  97         dependencyResolver.validateDependency(
  98                 TestingThreadPoolServiceInterface.class, threadPoolON,
  99                 threadPoolONJMXAttribute);
 100
 101         checkState(Strings.isNullOrEmpty(someParam) == false,
 102                 "Parameter 'SomeParam' is blank");
 103         // check that calling resolveInstance fails
 104         try {
 105             dependencyResolver.resolveInstance(TestingThreadPoolIfc.class,
 106                     threadPoolON, threadPoolONJMXAttribute);
 107             throw new RuntimeException("fail");
 108         } catch (IllegalStateException e) {
 109             checkState("Commit was not triggered".equals(e.getMessage()),
 110                     e.getMessage());
 111         }
 112     }
 113
 114     @Override
 115     public Closeable getInstance() {
 116         if (instance == null) {
 117             TestingThreadPoolIfc threadPoolInstance = dependencyResolver
 118                     .resolveInstance(TestingThreadPoolIfc.class, threadPoolON, threadPoolONJMXAttribute);
 119
 120             if (oldInstance != null) {
 121                 // changing thread pool is not supported
 122                 boolean reuse = threadPoolInstance.equals(oldInstance
 123                         .getThreadPool());
 124                 if (reuse) {
 125                     logger.debug("Reusing old instance");
 126                     instance = oldInstance;
 127                     instance.setSomeParam(someParam);
 128                 }
 129             }
 130             if (instance == null) {
 131                 logger.debug("Creating new instance");
 132                 if (oldCloseable != null) {
 133                     try {
 134                         oldCloseable.close();
 135                     } catch (Exception e) {
 136                         throw new RuntimeException(e);
 137                     }
 138                 }
 139                 instance = new TestingParallelAPSPImpl(threadPoolInstance,
 140                         someParam);
 141             }
 142         }
 143         return instance;
 144     }
 145 }