Fixed deployment of mount points (dynamic instances of MD-SAL)

[controller.git] / opendaylight / md-sal / sal-binding-util / src / main / java / org / opendaylight / controller / md / sal / binding / util / BindingContextUtils.java

diff --git a/opendaylight/md-sal/sal-binding-util/src/main/java/org/opendaylight/controller/md/sal/binding/util/BindingContextUtils.java b/opendaylight/md-sal/sal-binding-util/src/main/java/org/opendaylight/controller/md/sal/binding/util/BindingContextUtils.java
new file mode 100644 (file)
index 0000000..6f2186b
--- /dev/null
+++ b/opendaylight/md-sal/sal-binding-util/src/main/java/org/opendaylight/controller/md/sal/binding/util/BindingContextUtils.java
@@ -0,0 +1,143 @@
+package org.opendaylight.controller.md.sal.binding.util;
+
+import java.awt.image.SinglePixelPackedSampleModel;
+
+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.BindingAwareProvider;
+import org.opendaylight.controller.sal.binding.api.BindingAwareProvider.ProviderFunctionality;
+import org.opendaylight.controller.sal.binding.api.rpc.RpcContextIdentifier;
+import org.opendaylight.controller.sal.binding.api.BindingAwareConsumer;
+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.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.binding.RpcService;
+
+import static com.google.common.base.Preconditions.*;
+
+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);
+        }
+        
+        @Deprecated
+        @Override
+        public void registerFunctionality(ProviderFunctionality functionality) {
+            // NOOP
+        }
+        
+        @Deprecated
+        @Override
+        public void unregisterFunctionality(ProviderFunctionality functionality) {
+            // NOOP
+        }
+    }
+}