| package org.onlab.onos.store.cluster.messaging; |
| |
| import java.io.IOException; |
| |
| import org.onlab.onos.cluster.NodeId; |
| |
| // TODO: Should payload type be ByteBuffer? |
| /** |
| * Base message for cluster-wide communications. |
| */ |
| public class ClusterMessage { |
| |
| private final NodeId sender; |
| private final MessageSubject subject; |
| private final byte[] payload; |
| |
| /** |
| * Creates a cluster message. |
| * |
| * @param subject message subject |
| */ |
| public ClusterMessage(NodeId sender, MessageSubject subject, byte[] payload) { |
| this.sender = sender; |
| this.subject = subject; |
| this.payload = payload; |
| } |
| |
| /** |
| * Returns the id of the controller sending this message. |
| * |
| * @return message sender id. |
| */ |
| public NodeId sender() { |
| return sender; |
| } |
| |
| /** |
| * Returns the message subject indicator. |
| * |
| * @return message subject |
| */ |
| public MessageSubject subject() { |
| return subject; |
| } |
| |
| /** |
| * Returns the message payload. |
| * |
| * @return message payload. |
| */ |
| public byte[] payload() { |
| return payload; |
| } |
| |
| /** |
| * Sends a response to the sender. |
| * |
| * @param data payload response. |
| * @throws IOException |
| */ |
| public void respond(byte[] data) throws IOException { |
| throw new IllegalStateException("One can only repond to message recived from others."); |
| } |
| } |