/**
* Copyright 2016 Yahoo Inc.
*
* 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 com.yahoo.pulsar.client.api;
import java.io.Serializable;
/**
* A listener that will be called in order for every message received.
*
*
*/
public interface MessageListener extends Serializable {
/**
* This method is called whenever a new message is received.
*
* Messages are guaranteed to be delivered in order and from the same thread for a single consumer
*
* This method will only be called once for each message, unless either application or broker crashes.
*
* Application is responsible of handling any exception that could be thrown while processing the message.
*
* @param consumer
* the consumer that received the message
* @param msg
* the message object
*/
void received(Consumer consumer, Message msg);
}