opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/sal/dom/broker/ConsumerContextImpl.java

   1 /*
   2  * Copyright (c) 2014 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.sal.dom.broker;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.collect.ClassToInstanceMap;
  13 import com.google.common.collect.MutableClassToInstanceMap;
  14 import java.util.Collection;
  15 import java.util.concurrent.atomic.AtomicBoolean;
  16 import org.opendaylight.controller.sal.core.api.Broker.ConsumerSession;
  17 import org.opendaylight.controller.sal.core.api.BrokerService;
  18 import org.opendaylight.controller.sal.core.api.Consumer;
  19 import org.opendaylight.controller.sal.dom.broker.osgi.AbstractBrokerServiceProxy;
  20 import org.opendaylight.controller.sal.dom.broker.osgi.ProxyFactory;
  21
  22 @Deprecated
  23 class ConsumerContextImpl implements ConsumerSession {
  24
  25     private final ClassToInstanceMap<BrokerService> instantiatedServices = MutableClassToInstanceMap.create();
  26     private final Consumer consumer;
  27
  28     private final BrokerImpl broker;
  29     private final AtomicBoolean closed = new AtomicBoolean(false);
  30
  31     ConsumerContextImpl(final Consumer provider, final BrokerImpl brokerImpl) {
  32         broker = brokerImpl;
  33         consumer = provider;
  34     }
  35
  36     @Override
  37     public <T extends BrokerService> T getService(final Class<T> service) {
  38         checkNotClosed();
  39         final T localProxy = instantiatedServices.getInstance(service);
  40         if (localProxy != null) {
  41             return localProxy;
  42         }
  43         final Optional<T> serviceImpl = broker.getGlobalService(service);
  44         if (serviceImpl.isPresent()) {
  45             final T ret = ProxyFactory.createProxy(null, serviceImpl.get());
  46             instantiatedServices.putInstance(service, ret);
  47             return ret;
  48         } else {
  49             return null;
  50         }
  51     }
  52
  53     @Override
  54     public void close() {
  55         if (closed.compareAndSet(false, true)) {
  56             Collection<BrokerService> toStop = instantiatedServices.values();
  57             for (BrokerService brokerService : toStop) {
  58                 if (brokerService instanceof AbstractBrokerServiceProxy<?>) {
  59                     ((AbstractBrokerServiceProxy<?>) brokerService).close();
  60                 }
  61             }
  62             broker.consumerSessionClosed(this);
  63         }
  64     }
  65
  66
  67     @Override
  68     public boolean isClosed() {
  69         return closed.get();
  70     }
  71
  72     /**
  73      * Gets broker.
  74      *
  75      * @return the broker
  76      */
  77     protected final BrokerImpl getBrokerChecked() {
  78         checkNotClosed();
  79         return broker;
  80     }
  81
  82     /**
  83      * Gets consumer.
  84      *
  85      * @return the _consumer
  86      */
  87     public Consumer getConsumer() {
  88         return consumer;
  89     }
  90
  91     protected final void checkNotClosed() {
  92         Preconditions.checkState(!closed.get(), "Session is closed.");
  93     }
  94 }