springboot中多线程开发的注意事项总结

@Configuration
@SpringBootApplication
@Import({ThreadConfig.class})
public class ThreadApp implements CommandLineRunner
{
 public static void main(String[] args) throws Exception {

  ApplicationContext app = SpringApplication.run(ThreadApp .class, args);
  //这里主要保存上下文对象实例，需要加上。SpringBootUtils类网上很多，可以自己搜下
  SpringBootUtils.setApplicationContext(app);

 }

 //access command line arguments
 @Override
 public void run(String... args) throws Exception {
  //do something
 }
}

//ComponentScan注解会扫描com.demo.thead下，也就是多线程类所在的包下的文件
@Configuration
@ComponentScan(basePackages = { "com.demo.thread"})
public class ThreadConfig{

}

@Component
public class demoThread extends Thread
{
 //注意这里，如果你没有实现把多线程类的实例注入到spring容器中，这里你是无法拿到其他自动装配的对象实例的的，这也是我们第一步的意义所在。
 @Autowired
 private XxxService xxxService;

 @PostConstruct
 public void start() {
  super.start();
 }

 public void run() {
  // Ok,在这里你就可以实现线程要实现的功能逻辑了，自然也可以直接使用装配好的sevice对象实例。
  
 }
}

private TaskThread thread;
 private ExecutorService taskPool= new ThreadPoolExecutor(
   5, 10, 1000,
   TimeUnit.MILLISECONDS, new ArrayBlockingQueue<>(10),
   new ThreadPoolExecutor.CallerRunsPolicy()); 


 @KafkaListener(topics = "xxTopic")
 public void receive(ConsumerRecord consumerRecord) {
   JSONObject json = JSON.parseObject(consumerRecord.value().toString());
   //通过SpringBootUtils获取线程类的实例
   thread = SpringBootUtils.getBean(TaskThread.class);
   //启动线程
   //new Thread(thread).start() ; 
   //向线程对象里传值
   thread.init(i);
   //放入线程池执行
   taskPool.execute(thread);

 }

//注意这里是否添加@Scope("prototype")注解
@Component
@Scope("prototype")
public class TaskThread implements Runnable{
 
 protected int value=0；

 @Autowired
 private XxxService xxxService;
 
 //ThreadLocal 对象，单例模式下可以保证成员变量的线程安全和独立性。
 public ThreadLocal valueLocal = new ThreadLocal  () {
  @Override
  protected Integer initialValue() {
   return 0;
  }
 };

 protected static final Logger LOG = LoggerFactory.getLogger(GpsTaskThread.class);
 
 @Override
 public final void run() {
  try { 
   LOG.info(value+"");
   
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

 public void init(int Value) {
  this.value=Value;
 }
}