2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.core.infrastructure.messaging;
23 import org.onap.policy.apex.core.infrastructure.messaging.impl.ws.messageblock.MessageBlock;
26 * The listener interface for receiving message events. The class that is interested in processing a message event
27 * implements this interface.
29 * @author Sajeevan Achuthan (sajeevan.achuthan@ericsson.com)
30 * @param <M> of message of any given type that is being listened for and handled
32 public interface MessageListener<M> {
35 * This method is called when a message block is received on a web socket and is to be forwarded to a listener.
37 * @param data the message data containing a message
39 void onMessage(MessageBlock<M> data);
42 * This method is called when a string message is received on a web socket and is to be forwarded to a listener.
44 * @param messageString the message string
46 void onMessage(String messageString);