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.rocketmq;
  
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.ObjectMapper;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.beans.factory.annotation.Value;
  import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
  import org.springframework.boot.builder.SpringApplicationBuilder;
  import org.springframework.cloud.bus.event.AckRemoteApplicationEvent;
  import org.springframework.cloud.bus.jackson.RemoteApplicationEventScan;
  import org.springframework.context.ApplicationEventPublisher;
  import org.springframework.context.event.EventListener;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestParam;
  import org.springframework.web.bind.annotation.RestController;
  
  /**
   * RocketMQ Bus Spring Application.
   *
   * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
   * @since 0.2.1
   */
  @RestController
  @EnableAutoConfiguration
  @RemoteApplicationEventScan(basePackages = "com.alibaba.cloud.examples.rocketmq")
  public class RocketMQBusApplication {
  
  	public static void main(String[] args) {
  		new SpringApplicationBuilder(RocketMQBusApplication.class)
  				.properties("server.port=0") // Random server port
  				.properties("management.endpoints.web.exposure.include=*") // exposure
  																			// includes
  																			// all
  				.properties("spring.cloud.bus.trace.enabled=true") // Enable trace
  				.run(args);
  	}
  
  	@Autowired
  	private ApplicationEventPublisher publisher;
  
  	@Value("${spring.cloud.bus.id}")
  	private String originService;
  
  	@Value("${server.port}")
  	private int localServerPort;
  
  	@Autowired
  	private ObjectMapper objectMapper;
  
  	/**
  	 * Publish the {@link UserRemoteApplicationEvent}.
  	 * @param name the user name
  	 * @param destination the destination
  	 * @return If published
  	 */
  	@GetMapping("/bus/event/publish/user")
  	public boolean publish(@RequestParam String name,
  			@RequestParam(required = false) String destination) {
  		User user = new User();
  		user.setId(System.currentTimeMillis());
  		user.setName(name);
  		publisher.publishEvent(
  				new UserRemoteApplicationEvent(this, user, originService, destination));
  		return true;
  	}
  
  	/**
  	 * Listener on the {@link UserRemoteApplicationEvent}.
  	 * @param event {@link UserRemoteApplicationEvent}
  	 */
  	@EventListener
  	public void onEvent(UserRemoteApplicationEvent event) {
  		System.out.printf("Server [port : %d] listeners on %s\n", localServerPort,
  				event.getUser());
  	}
  
  	@EventListener
  	public void onAckEvent(AckRemoteApplicationEvent event)
  			throws JsonProcessingException {
  		System.out.printf("Server [port : %d] listeners on %s\n", localServerPort,
  				objectMapper.writeValueAsString(event));
  	}
  
  }
  