opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/sal/binding/impl/BindingAwareBrokerImpl.xtend

   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.sal.binding.impl
   9
  10 import org.opendaylight.controller.sal.binding.api.BindingAwareConsumer
  11 import org.opendaylight.controller.sal.binding.api.BindingAwareProvider
  12 import org.opendaylight.yangtools.yang.binding.RpcService
  13 import javassist.ClassPool
  14 import org.osgi.framework.BundleContext
  15 import java.util.Map
  16 import java.util.HashMap
  17 import javassist.LoaderClassPath
  18 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker
  19 import java.util.Hashtable
  20 import static extension org.opendaylight.controller.sal.binding.codegen.RuntimeCodeHelper.*
  21
  22 import org.opendaylight.controller.sal.binding.api.NotificationProviderService
  23 import org.osgi.framework.ServiceRegistration
  24 import static org.opendaylight.controller.sal.binding.impl.osgi.Constants.*
  25 import static extension org.opendaylight.controller.sal.binding.impl.osgi.PropertiesUtils.*
  26 import org.opendaylight.controller.sal.binding.api.NotificationService
  27 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext
  28
  29 import org.slf4j.LoggerFactory
  30 import org.opendaylight.controller.sal.binding.codegen.impl.RuntimeCodeGenerator
  31
  32 class BindingAwareBrokerImpl implements BindingAwareBroker {
  33     private static val log = LoggerFactory.getLogger(BindingAwareBrokerImpl)
  34
  35     private val clsPool = ClassPool.getDefault()
  36     private var RuntimeCodeGenerator generator;
  37     private Map<Class<? extends RpcService>, RpcProxyContext> managedProxies = new HashMap();
  38     private var NotificationBrokerImpl notifyBroker
  39     private var ServiceRegistration<NotificationProviderService> notifyBrokerRegistration
  40
  41     @Property
  42     var BundleContext brokerBundleContext
  43
  44     def start() {
  45         initGenerator();
  46
  47         // Initialization of notificationBroker
  48         notifyBroker = new NotificationBrokerImpl(null);
  49         val brokerProperties = newProperties();
  50         notifyBrokerRegistration = brokerBundleContext.registerService(NotificationProviderService, notifyBroker,
  51             brokerProperties)
  52         brokerBundleContext.registerService(NotificationService, notifyBroker, brokerProperties)
  53     }
  54
  55     def initGenerator() {
  56
  57         // YANG Binding Class Loader
  58         clsPool.appendClassPath(new LoaderClassPath(RpcService.classLoader));
  59         generator = new RuntimeCodeGenerator(clsPool);
  60     }
  61
  62     override registerConsumer(BindingAwareConsumer consumer, BundleContext bundleCtx) {
  63         val ctx = consumer.createContext(bundleCtx)
  64         consumer.onSessionInitialized(ctx)
  65         return ctx
  66     }
  67
  68     override registerProvider(BindingAwareProvider provider, BundleContext bundleCtx) {
  69         val ctx = provider.createContext(bundleCtx)
  70         provider.onSessionInitialized(ctx)
  71         provider.onSessionInitiated(ctx as ProviderContext)
  72         return ctx
  73     }
  74
  75     private def createContext(BindingAwareConsumer consumer, BundleContext consumerCtx) {
  76         new OsgiConsumerContext(consumerCtx, this)
  77     }
  78
  79     private def createContext(BindingAwareProvider provider, BundleContext providerCtx) {
  80         new OsgiProviderContext(providerCtx, this)
  81     }
  82
  83     /**
  84      * Returns a Managed Direct Proxy for supplied class
  85      *
  86      * Managed direct proxy is a generated proxy class conforming to the supplied interface
  87      * which delegates all calls to the backing delegate.
  88      *
  89      * Proxy does not do any validation, null pointer checks or modifies data in any way, it
  90      * is only use to avoid exposing direct references to backing implementation of service.
  91      *
  92      * If proxy class does not exist for supplied service class it will be generated automatically.
  93      */
  94     def <T extends RpcService> getManagedDirectProxy(Class<T> service) {
  95
  96         var RpcProxyContext existing = null
  97         if ((existing = managedProxies.get(service)) != null) {
  98             return existing.proxy
  99         }
 100         val proxyClass = generator.generateDirectProxy(service)
 101         val rpcProxyCtx = new RpcProxyContext(proxyClass)
 102         val properties = new Hashtable<String, String>()
 103         rpcProxyCtx.proxy = proxyClass.newInstance as RpcService
 104
 105         properties.salServiceType = SAL_SERVICE_TYPE_CONSUMER_PROXY
 106         rpcProxyCtx.registration = brokerBundleContext.registerService(service, rpcProxyCtx.proxy as T, properties)
 107         managedProxies.put(service, rpcProxyCtx)
 108         return rpcProxyCtx.proxy
 109     }
 110     /**
 111      * Registers RPC Implementation
 112      *
 113      */
 114     def <T extends RpcService> registerRpcImplementation(Class<T> type, T service, OsgiProviderContext context,
 115         Hashtable<String, String> properties) {
 116         val proxy = getManagedDirectProxy(type)
 117         if(proxy.delegate != null) {
 118             throw new IllegalStateException("Service " + type + "is already registered");
 119         }
 120         val osgiReg = context.bundleContext.registerService(type, service, properties);
 121         proxy.delegate = service;
 122         return new RpcServiceRegistrationImpl<T>(type, service, osgiReg);
 123     }
 124 }