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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.rocketmq.example.schedule;

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.common.message.MessageExt;

public class ScheduledMessageConsumer {

    public static final String CONSUMER_GROUP = "ExampleConsumer";
    public static final String DEFAULT_NAMESRVADDR = "127.0.0.1:9876";
    public static final String TOPIC = "TestTopic";

    public static void main(String[] args) throws Exception {
        // Instantiate message consumer
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer(CONSUMER_GROUP);

        // Uncomment the following line while debugging, namesrvAddr should be set to your local address
//        consumer.setNamesrvAddr(DEFAULT_NAMESRVADDR);

        // Subscribe topics
        consumer.subscribe(TOPIC, "*");
        // Register message listener
        consumer.registerMessageListener((MessageListenerConcurrently) (messages, context) -> {
            for (MessageExt message : messages) {
                // Print approximate delay time period
                System.out.printf("Receive message[msgId=%s %d  ms later]\n", message.getMsgId(),
                    System.currentTimeMillis() - message.getStoreTimestamp());
            }
            return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
        });
        // Launch consumer
        consumer.start();
        //info:to see the time effect, run the consumer first , it will wait for the msg
        //then start the producer
    }
}