/*
* Copyright (c) 2014 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.controller.md.sal.binding.util;
import static com.google.common.base.Preconditions.checkNotNull;
import org.opendaylight.controller.md.sal.common.api.routing.RouteChangeListener;
import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ConsumerContext;
import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.RoutedRpcRegistration;
import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.RpcRegistration;
import org.opendaylight.controller.sal.binding.api.BindingAwareConsumer;
import org.opendaylight.controller.sal.binding.api.BindingAwareProvider;
import org.opendaylight.controller.sal.binding.api.BindingAwareService;
import org.opendaylight.controller.sal.binding.api.RpcConsumerRegistry;
import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
import org.opendaylight.controller.sal.binding.api.rpc.RpcContextIdentifier;
import org.opendaylight.yangtools.concepts.ListenerRegistration;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.opendaylight.yangtools.yang.binding.RpcService;
import com.google.common.collect.ClassToInstanceMap;
import com.google.common.collect.MutableClassToInstanceMap;
public class BindingContextUtils {
public static ConsumerContext createConsumerContext(BindingAwareConsumer consumer,
ClassToInstanceMap<BindingAwareService> serviceProvider) {
checkNotNull(consumer,"Consumer should not be null");
checkNotNull(serviceProvider,"Service map should not be null");
return new SingleConsumerContextImpl(serviceProvider);
}
public static ProviderContext createProviderContext(BindingAwareProvider provider,
ClassToInstanceMap<BindingAwareService> serviceProvider) {
checkNotNull(provider,"Provider should not be null");
checkNotNull(serviceProvider,"Service map should not be null");
return new SingleProviderContextImpl(serviceProvider);
}
public static ConsumerContext createConsumerContextAndInitialize(BindingAwareConsumer consumer,
ClassToInstanceMap<BindingAwareService> serviceProvider) {
ConsumerContext context = createConsumerContext(consumer, serviceProvider);
consumer.onSessionInitialized(context);
return context;
}
public static ProviderContext createProviderContextAndInitialize(BindingAwareProvider provider,
ClassToInstanceMap<BindingAwareService> serviceProvider) {
ProviderContext context = createProviderContext(provider, serviceProvider);
provider.onSessionInitiated(context);
return context;
}
public static <T extends BindingAwareService> T createContextProxyOrReturnService(Class<T> service, T instance) {
// FIXME: Create Proxy
return instance;
}
private static class SingleConsumerContextImpl implements ConsumerContext, AutoCloseable {
private ClassToInstanceMap<BindingAwareService> alreadyRetrievedServices;
private ClassToInstanceMap<BindingAwareService> serviceProvider;
public SingleConsumerContextImpl(ClassToInstanceMap<BindingAwareService> serviceProvider) {
this.alreadyRetrievedServices = MutableClassToInstanceMap.create();
this.serviceProvider = serviceProvider;
}
@Override
public final <T extends RpcService> T getRpcService(Class<T> module) {
return getSALService(RpcConsumerRegistry.class).getRpcService(module);
}
@Override
public final <T extends BindingAwareService> T getSALService(Class<T> service) {
checkNotNull(service,"Service class should not be null.");
T potential = alreadyRetrievedServices.getInstance(service);
if(potential != null) {
return potential;
}
return tryToRetrieveSalService(service);
}
private synchronized <T extends BindingAwareService> T tryToRetrieveSalService(Class<T> service) {
final T potential = alreadyRetrievedServices.getInstance(service);
if(potential != null) {
return potential;
}
final T requested = serviceProvider.getInstance(service);
if(requested == null) {
throw new IllegalArgumentException("Requested service "+service.getName() +" is not available.");
}
final T retrieved = BindingContextUtils.createContextProxyOrReturnService(service,requested);
alreadyRetrievedServices.put(service, retrieved);
return retrieved;
}
@Override
public final void close() throws Exception {
alreadyRetrievedServices = null;
serviceProvider = null;
}
}
private static class SingleProviderContextImpl extends SingleConsumerContextImpl implements ProviderContext {
public SingleProviderContextImpl(ClassToInstanceMap<BindingAwareService> serviceProvider) {
super(serviceProvider);
}
@Override
public <L extends RouteChangeListener<RpcContextIdentifier, InstanceIdentifier<?>>> ListenerRegistration<L> registerRouteChangeListener(
L listener) {
return getSALService(RpcProviderRegistry.class).registerRouteChangeListener(listener);
}
@Override
public <T extends RpcService> RoutedRpcRegistration<T> addRoutedRpcImplementation(Class<T> type,
T implementation) throws IllegalStateException {
return getSALService(RpcProviderRegistry.class).addRoutedRpcImplementation(type, implementation);
}
@Override
public <T extends RpcService> RpcRegistration<T> addRpcImplementation(Class<T> type, T implementation)
throws IllegalStateException {
return getSALService(RpcProviderRegistry.class).addRpcImplementation(type, implementation);
}
}
}