import org.opendaylight.yangtools.yang.binding.RpcService;
/**
- *
- * Defines the component of controller and supplies additional metadata. A
- * component of the controller or application supplies a concrete implementation
- * of this interface.
- *
+ *
+ * A developer implemented component that gets registered with the Broker.
+ *
+ * Semantically, a provider may:
+ *
+ * <ol>
+ * <li> Emit Notifications</li>
+ * <li> Provide the implementation of RPCs </li>
+ * <li> Write to the operational data tree </li>
+ * </ol>
+ *
+ * If a class is not doing at least one of those three, consider using
+ * a BindingAwareConsumer instead:
+ * @see org.opendaylight.controller.sal.binding.api.BindingAwareConsumer
+ *
+ * <p>
+ *
+ *In addition, a BindingAwareProvider can in pursuit of its goals:
+ *
+ * <ol>
+ * <li>Subscribe for Notifications </li>
+ * <li>Invoke RPCs</li>
+ * <li>Read from either the operational or config data tree</li>
+ * <li>Write to the config data tree</li>
+ * </ol>
+ * (All of the above are things a Consumer can also do).
+ *
+ *<p>
+ *
+ * Examples:
+ *
+ *<p>
+ *
+ * To get a NotificationService:
+ *
+ * {code
+ * public void onSessionInitiated(ProviderContext session) {
+ * NotificationProviderService notificationService = session.getSALService(NotificationProviderService.class);
+ * }
+ * For more information on sending notifications via the NotificationProviderService
+ * @see org.opendaylight.controller.sal.binding.api.NotificationProviderService
+ *
+ * To register an RPC implementation:
+ *
+ * {code
+ * public void onSessionInitiated(ProviderContext session) {
+ * RpcRegistration<MyService> registration = session.addRpcImplementation(MyService.class, myImplementationInstance);
+ * }
+ *
+ * <p>
+ *
+ * Where MyService.class is a Service interface generated from a yang model with RPCs modeled in it and myImplementationInstance
+ * is an instance of a class that implements MyService.
+ *
+ * To register a Routed RPC Implementation:
+ * {code
+ * public void onSessionInitiated(ProviderContext session) {
+ * RoutedRpcRegistration<SalFlowService> flowRegistration = session.addRoutedRpcImplementation(SalFlowService.class, salFlowServiceImplementationInstance);
+ flowRegistration.registerPath(NodeContext.class, nodeInstanceId);
+ * }
+ * }
+ *
+ * Where SalFlowService.class is a Service interface generated from a yang model with RPCs modeled in it and salFlowServiceImplementationInstance is an instance
+ * of a class that implements SalFlowService.
* <p>
- * A user-implemented component (application) which facilitates the SAL and SAL
- * services to access infrastructure services and to provide functionality to
- * {@link Consumer}s and other providers.
- *
- *
+ * The line:
+ * {code
+ * flowRegistration.registerPath(NodeContext.class, nodeInstanceId);
+ * }
+ * Is indicating that the RPC implementation is registered to handle RPC invocations that have their NodeContext pointing to the node with instance id nodeInstanceId.
+ * This bears a bit of further explanation. RoutedRPCs can be 'routed' to an implementation based upon 'context'. 'context' is a pointer (instanceId) to some place
+ * in the data tree. In this example, the 'context' is a pointer to a Node. In this way, a provider can register its ability to provide a service for a particular
+ * Node, but not *all* Nodes. The Broker routes the RPC by 'context' to the correct implementation, without the caller having to do extra work. Because of this when
+ * a RoutedRPC is registered, it needs to also be able to indicate for which 'contexts' it is providing an implementation.
+ *
+ * An example of a Routed RPC would be an updateFlow(node, flow) that would be routed based on node to the provider which had registered to provide
+ * it *for that node*.
+ *
+ *<p>
+ *
+ * To get a DataBroker to allow access to the data tree:
+ *
+ * {code
+ * public void onSessionInitiated(final ProviderContext session) {
+ * DataBroker databroker = session.getSALService(BindingDataBroker.class);
+ * }
+ * }
+ * @see org.opendaylight.controller.md.sal.common.api.data.BindingDataBroker
+ * for more info on using the DataBroker.
+ *
*/
public interface BindingAwareProvider {
- void onSessionInitialized(ConsumerContext session);
-
/**
- * Returns a set of provided implementations of YANG modules and their rpcs.
- *
- *
- * @return Set of provided implementation of YANG modules and their Rpcs
+ * @deprecated
+ *
+ * This interface was originally intended to solve problems of how to get Implementations
+ * of functionality from a provider, but that is no longer necessary because the Provider
+ * Registers RPCs in onSessionInitiated.
+ *
+ * Recommend:
+ * {code
+ * public Collection<? extends RpcService> getImplementations() {
+ * return Collections.emptySet();
+ * }
+ * }
*/
+ @Deprecated
Collection<? extends RpcService> getImplementations();
/**
- * Gets a set of implementations of provider functionality to be registered
- * into system during the provider registration to the SAL.
- *
- * <p>
- * This method is invoked by {@link Broker#registerProvider(Provider)} to
- * learn the initial provided functionality
- *
- * @return Set of provider's functionality.
+ * @deprecated
+ *
+ * This interface was originally intended to solve problems of how to get Functionality
+ * a provider could provide, but that is no longer necessary because the Provider
+ * Registers RPCs in onSessionInitiated.
+ *
+ * Recommend:
+ * {code
+ * public Collection<? extends ProviderFunctionality> getFunctionality() {
+ * return Collections.emptySet();
+ * }
+ * }
+ *
*/
+ @Deprecated
Collection<? extends ProviderFunctionality> getFunctionality();
/**
* Functionality provided by the {@link BindingAwareProvider}
- *
+ *
* <p>
* Marker interface used to mark the interfaces describing specific
* functionality which could be exposed by providers to other components.
- *
- *
- *
+ *
+ *
+ *
*/
+ @Deprecated
public interface ProviderFunctionality {
}
-
+ /**
+ * Callback signaling initialization of the consumer session to the SAL.
+ *
+ * The consumer MUST use the session for all communication with SAL or
+ * retrieving SAL infrastructure services.
+ *
+ * This method is invoked by
+ * {@link BindingAwareBroker#registerProvider(BindingAwareProvider)}
+ *
+ * @param session Unique session between consumer and SAL.
+ */
void onSessionInitiated(ProviderContext session);
+ /*
+ * @deprecated
+ *
+ * A provider was at one point considered an extension of a consumer, thus this
+ * call. It is deprecated and the @see org.opendaylight.controller.sal.binding.api.BindingAwareConsumer#onSessionInitiated
+ * used, or you should simply use {@link #onSessionInitiated(ProviderContext)}
+ *
+ * Recommend:
+ * {code
+ * public final void onSessionInitialized(ConsumerContext session) {
+ * // NOOP - as method is deprecated
+ * }
+ * }
+ */
+ @Deprecated
+ void onSessionInitialized(ConsumerContext session);
+
}
Code Review / controller.git / blobdiff