定时任务返回结果给方法
定时任务返回结果给方法
示例代码:
存在一些小问题,list会添加重复的数据,后面用到再优化一下
package com.sucsoft.video.service.develop;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
/**
* 轮播画面定时器
*/
@Service
public class VsCarouselTimerService {
private static ScheduledExecutorService pool = Executors.newScheduledThreadPool(5);
private static final Logger logger = Logger.getLogger(VsCarouselTimerService.class);
private static String url = "";
private static Map map = new HashMap();
private List<Map> list = new ArrayList<Map>();
@Autowired
private RestTemplate restTemplate;
/**
* 每5分钟请求一次, 延迟1分钟开始执行
* @param id
*/
public void requestStream(String id) {
// 防止重复创建线程
if(Thread.currentThread().isAlive()) {
this.pool.shutdown();
pool = Executors.newScheduledThreadPool(5);
}
pool.scheduleAtFixedRate(() -> {
try {
map = restTemplate.getForObject(url, Map.class);
list.add(map);
} catch (Exception e) {
logger.error(e);
}
}, 1, 300, TimeUnit.SECONDS);
}
/**
* 转发流给前端
* @return
*/
public List<Map> forwardStream() {
return list;
}
}