SpringBoot+springmvc异步处理请求

有两种情况，第一种是业务逻辑复杂，但不需要业务逻辑的结果，第二种是需要返回业务逻辑的处理结果

第一种比较简单，利用多线程处理业务逻辑，或者利用spring中@Asyn注解更简单，

使用@Asyn注解，要首先要配置开启异步注解

@Configuration

@EnableAsync

public class AsyncConfig {

}

然后直接在方法上注解即可

@Service

public class AsyncAction {

@Async

public void fun1() {

try {

Thread.sleep(10000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println("fun1");

}

}

切记异步类的bean不能被重复扫描，而且只能被sping容器的上下文扫描，不能被spingmvc扫描，否则异步失效

第二种需要返回业务逻辑情况则首先需要开启异步支持

public class SpitterWebInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

@Override

protected void customizeRegistration(Dynamic registration) {

registration.setAsyncSupported(true);

}

或者在web.xml中开启

<servlet>

<servlet-name>SpringMvcservlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>

<init-param>

<param-name>contextConfigLocationparam-name>

<param-value>...param-value>

init-param>

<load-on-startup>1load-on-startup>

<async-supported>trueasync-supported>

servlet>

然后配置一下线程池

@Configuration

@EnableWebMvc

@ComponentScan("spittr.web")

public class WebConfig extends WebMvcConfigurerAdapter {

@Override

public void configureAsyncSupport(AsyncSupportConfigurer configurer) {

ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();

executor.setCorePoolSize(5);

executor.setMaxPoolSize(10);

executor.setQueueCapacity(50);

executor.setThreadNamePrefix("abc-");

executor.setKeepAliveSeconds(30);

configurer.setTaskExecutor(executor);

configurer.setDefaultTimeout(600);

}

@Configuration

@EnableWebMvc

@ComponentScan("spittr.web")

public class WebConfig extends WebMvcConfigurerAdapter {

这样就可以开始异步处理任务了，能够尽快释放servlet线程，缓解高并发问题

@RequestMapping(value = "/async")

public @ResponseBody Callable async() {

 return new Callable() {
            @Override
            public String call() throws Exception {
                Thread.sleep(2000);
                return "Callable result";
            }
        };

}

转载于:https://www.cnblogs.com/jpfss/p/9329410.html