Spring的非同步執行緒處理
阿新 • • 發佈:2020-09-21
Spring封裝了JDK的執行緒池和執行緒呼叫,並使用標籤就可以開啟多執行緒呼叫。
先進行一個Spring的執行緒池配置
@Configuration
@EnableAsync
public class ThreadPoolConfig implements AsyncConfigurer {
@Bean
@Override
public Executor getAsyncExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(Runtime.getRuntime ().availableProcessors());
executor.setMaxPoolSize(Runtime.getRuntime().availableProcessors() * 5);
executor.setQueueCapacity(Runtime.getRuntime().availableProcessors() * 2);
executor.setThreadNamePrefix("this-executor-");
executor.initialize();
return executor;
}
@Bean
@Override
public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
return new SimpleAsyncUncaughtExceptionHandler();
}
}
再編寫一個Service的非同步方法呼叫,這裡是帶返回值的,不帶返回值的方法比較簡單,這裡就不舉例了。
@Service
@Slf4j
public class ThreadTasks {
/**
* 如果非同步方法有返回值,一定要使用Future包裝,否則無法返回
* @return
* @throws InterruptedException
*/
@Async
public Future<String> startTask() throws InterruptedException {
Thread.sleep(3000);
log .info("this is async task");
return new AsyncResult<>("123456");
}
}
最後寫一個Controller,對該非同步方法進行呼叫
@RestController
public class AsyncTaskController {
@Autowired
private ThreadTasks tasks;
@GetMapping("/users-anon/useTask")
public String useSyncTask() throws InterruptedException, ExecutionException {
Future<String> future = tasks.startTask();
return future.get();
}
}
最後執行下來,我們可以看到每次都是不同的執行緒執行
2020-09-21 16:33:53.027 INFO [user-center,3e635fca3d1259da,d30e8b6372922137,false] 1126 --- [this-executor-1] com.cloud.user.service.ThreadTasks : this is async task
2020-09-21 16:35:27.664 INFO [user-center,9b68efbb2c848d7b,895ed921f6c8fe03,false] 1126 --- [this-executor-2] com.cloud.user.service.ThreadTasks : this is async task
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