| /* |
| * Copyright 2014 Open Networking Laboratory |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.onlab.netty; |
| |
| import java.io.IOException; |
| |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| /** |
| * Interface for low level messaging primitives. |
| */ |
| public interface MessagingService { |
| /** |
| * Sends a message asynchronously to the specified communication end point. |
| * The message is specified using the type and payload. |
| * @param ep end point to send the message to. |
| * @param type type of message. |
| * @param payload message payload bytes. |
| * @throws IOException when I/O exception of some sort has occurred |
| */ |
| public void sendAsync(Endpoint ep, String type, byte[] payload) throws IOException; |
| |
| /** |
| * Sends a message synchronously and waits for a response. |
| * @param ep end point to send the message to. |
| * @param type type of message. |
| * @param payload message payload. |
| * @return a response future |
| * @throws IOException when I/O exception of some sort has occurred |
| */ |
| public ListenableFuture<byte[]> sendAndReceive(Endpoint ep, String type, byte[] payload) throws IOException; |
| |
| /** |
| * Registers a new message handler for message type. |
| * @param type message type. |
| * @param handler message handler |
| */ |
| public void registerHandler(String type, MessageHandler handler); |
| |
| /** |
| * Unregister current handler, if one exists for message type. |
| * @param type message type |
| */ |
| public void unregisterHandler(String type); |
| } |