content: /*
   * Copyright 2013-2023 the original author or authors.
   *
   * 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
   *
   *      https://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.alibaba.cloud.examples.pollable;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import com.alibaba.cloud.examples.common.SimpleMsg;
  import org.apache.rocketmq.common.message.MessageConst;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.ApplicationRunner;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  import org.springframework.cloud.stream.binder.PollableMessageSource;
  import org.springframework.cloud.stream.function.StreamBridge;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.context.annotation.Bean;
  import org.springframework.core.ParameterizedTypeReference;
  import org.springframework.messaging.Message;
  import org.springframework.messaging.support.GenericMessage;
  
  /**
   * @author sorie
   */
  @SpringBootApplication
  public class RocketMQPollableConsumeApplication {
  
  	private static final Logger log = LoggerFactory
  			.getLogger(RocketMQPollableConsumeApplication.class);
  
  	@Autowired
  	private StreamBridge streamBridge;
  
  	public static void main(String[] args) {
  		ConfigurableApplicationContext context = SpringApplication.run(RocketMQPollableConsumeApplication.class, args);
  		PollableMessageSource destIn = context.getBean(PollableMessageSource.class);
  		new Thread(() -> {
  			while (true) {
  				try {
  					if (!destIn.poll((m) -> {
  						SimpleMsg newPayload = (SimpleMsg) m.getPayload();
  						System.out.println(newPayload.getMsg());
  					}, new ParameterizedTypeReference<SimpleMsg>() {
  					})) {
  						Thread.sleep(1000);
  					}
  				}
  				catch (Exception e) {
  					// handle failure
  				}
  			}
  		}).start();
  	}
  
  	@Bean
  	public ApplicationRunner producer() {
  		return args -> {
  			for (int i = 0; i < 100; i++) {
  				String key = "KEY" + i;
  				Map<String, Object> headers = new HashMap<>();
  				headers.put(MessageConst.PROPERTY_KEYS, key);
  				Message<SimpleMsg> msg = new GenericMessage(
  						new SimpleMsg("Hello RocketMQ " + i), headers);
  				streamBridge.send("producer-out-0", msg);
  			}
  		};
  	}
  
  }
  