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 java.util.Collection;
  11 import java.util.concurrent.Future;
  12
  13 import javax.annotation.concurrent.GuardedBy;
  14
  15 import org.opendaylight.controller.sal.core.api.Broker.ConsumerSession;
  16 import org.opendaylight.controller.sal.core.api.BrokerService;
  17 import org.opendaylight.controller.sal.core.api.Consumer;
  18 import org.opendaylight.controller.sal.dom.broker.osgi.AbstractBrokerServiceProxy;
  19 import org.opendaylight.controller.sal.dom.broker.osgi.ProxyFactory;
  20 import org.opendaylight.yangtools.yang.common.QName;
  21 import org.opendaylight.yangtools.yang.common.RpcResult;
  22 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
  23 import org.osgi.framework.BundleContext;
  24 import org.osgi.framework.ServiceReference;
  25
  26 import com.google.common.collect.ClassToInstanceMap;
  27 import com.google.common.collect.MutableClassToInstanceMap;
  28
  29 class ConsumerContextImpl implements ConsumerSession {
  30
  31     private final ClassToInstanceMap<BrokerService> instantiatedServices = MutableClassToInstanceMap
  32             .create();
  33     private final BundleContext context;
  34     private final Consumer consumer;
  35
  36     private BrokerImpl broker = null;
  37     @GuardedBy("this")
  38     private boolean closed = false;
  39
  40     public ConsumerContextImpl(final Consumer consumer, final BundleContext ctx) {
  41         this.consumer = consumer;
  42         this.context = ctx;
  43     }
  44
  45     @Override
  46     public Future<RpcResult<CompositeNode>> rpc(final QName rpc,
  47             final CompositeNode input) {
  48         return broker.invokeRpcAsync(rpc, input);
  49     }
  50
  51     @Override
  52     public <T extends BrokerService> T getService(final Class<T> service) {
  53         final T localProxy = instantiatedServices.getInstance(service);
  54         if (localProxy != null) {
  55             return localProxy;
  56         }
  57         final ServiceReference<T> serviceRef = context
  58                 .getServiceReference(service);
  59         if (serviceRef == null) {
  60             return null;
  61         }
  62         final T serviceImpl = context.getService(serviceRef);
  63         final T ret = ProxyFactory.createProxy(serviceRef, serviceImpl);
  64         if (ret != null) {
  65             instantiatedServices.putInstance(service, ret);
  66         }
  67         return ret;
  68     }
  69
  70     @Override
  71     public void close() {
  72         synchronized (this) {
  73             if (closed) {
  74                 return;
  75             }
  76             this.closed = true;
  77         }
  78
  79         Collection<BrokerService> toStop = instantiatedServices.values();
  80         for (BrokerService brokerService : toStop) {
  81             if (brokerService instanceof AbstractBrokerServiceProxy<?>) {
  82                 ((AbstractBrokerServiceProxy<?>) brokerService).close();
  83             }
  84         }
  85         broker.consumerSessionClosed(this);
  86     }
  87
  88     @Override
  89     public synchronized boolean isClosed() {
  90         return closed;
  91     }
  92
  93     /**
  94      * @return the broker
  95      */
  96     public BrokerImpl getBroker() {
  97         return broker;
  98     }
  99
 100     /**
 101      * @param broker
 102      *            the broker to set
 103      */
 104     public void setBroker(final BrokerImpl broker) {
 105         this.broker = broker;
 106     }
 107
 108     /**
 109      * @return the _consumer
 110      */
 111     public Consumer getConsumer() {
 112         return consumer;
 113     }
 114 }