异步REST API生成警告

问题描述 投票:3回答:4

我正在使用Spring Boot应用程序。我有一个返回Controller的rest控制器。

@GetMapping("/fb-roles")
@Timed
public Callable<List<FbRole>> getAllFbRoles() {
    log.debug("REST request to get all FbRoles");
    return (() -> { return fbRoleRepository.findAll(); });
}

ThreadPoolTask​​Executor的配置如下:

@Configuration
@EnableAsync
@EnableScheduling
public class AsyncConfiguration implements AsyncConfigurer {

private final Logger log = LoggerFactory.getLogger(AsyncConfiguration.class);

private final JHipsterProperties jHipsterProperties;

public AsyncConfiguration(JHipsterProperties jHipsterProperties) {
    this.jHipsterProperties = jHipsterProperties;
}

@Override
@Bean(name = "taskExecutor")
public Executor getAsyncExecutor() {
    log.debug("Creating Async Task Executor");
    ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
    executor.setCorePoolSize(jHipsterProperties.getAsync().getCorePoolSize());
    executor.setMaxPoolSize(jHipsterProperties.getAsync().getMaxPoolSize());
    executor.setQueueCapacity(jHipsterProperties.getAsync().getQueueCapacity());
    executor.setThreadNamePrefix("fb-quiz-Executor-");
    return new ExceptionHandlingAsyncTaskExecutor(executor);
}

@Override
public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
    return new SimpleAsyncUncaughtExceptionHandler();
}

}

2018-09-19 00:43:58.434警告10104 --- [XNIO-2 task-28] o.s.w.c.request.async.WebAsyncManager:!!!需要执行程序来处理java.util.concurrent.Callable返回值。请在“异步支持”下的MVC配置中配置TaskExecutor。当前使用的SimpleAsyncTaskExecutor在负载下不适合。

但是在访问api服务器时会产生以下警告

spring spring-mvc spring-boot jhipster spring-async
4个回答
6
投票

Spring配置在这方面有点令人困惑,因为它需要单独的配置来支持MVC异步,即使用返回Callable的Controller处理程序方法以及任何以@Async注释的Spring bean方法。要正确配置两者,您可以应用以下配置,请注意AsyncTaskExecutor配置可能需要修改:

@Configuration
@EnableAsync
public class AsyncConfig  implements AsyncConfigurer {

    @Bean
    protected WebMvcConfigurer webMvcConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void configureAsyncSupport(AsyncSupportConfigurer configurer) {
                configurer.setTaskExecutor(getTaskExecutor());
            }
        };
    }

    @Bean
    protected ConcurrentTaskExecutor getTaskExecutor() {
        return new ConcurrentTaskExecutor(Executors.newFixedThreadPool(5));
    }
}

附带说明,您可能会想用@Async简单地注释Controller处理程序方法。这只会在火灾和遗忘操作上产生预期的效果-释放Web服务器线程-(此观察基于Spring Boot 2.1.2,将来可能会解决此问题)。如果要利用Servlet 3.0异步处理的功能,则确实必须使用Callables并将其配置为WebMvcConfigurer


1
投票

给出警告和您的Callable方法。

似乎Spring无法识别您刚刚设置的Executor bean在您的配置类中。

您可能需要注释您的方法并指定执行者bean名称,所以

@GetMapping("/fb-roles")
@Timed
@Async("taskExecutor")
public Callable<List<FbRole>> getAllFbRoles() {
    log.debug("REST request to get all FbRoles");
    return (() -> { return fbRoleRepository.findAll(); });
}

希望这会有所帮助

指南可在此处找到:https://www.baeldung.com/spring-async


0
投票

从警告“请在。当前正在使用的SimpleAsyncTaskExecutor在负载下不适合。”

我想知道您是否使用spring mvc吗?

使用MVC,以下几个链接可能会有所帮助:

Configuring mvc async task executor in springboot application

Spring Boot - Any shortcuts for setting TaskExecutor?


0
投票
我结合了mvc配置(xml +注释),对我而言,以下配置有助于解决该警告:

mvc-servlet.xml:

<mvc:annotation-driven> <mvc:async-support default-timeout="30000" task-executor="taskExecutor" </mvc:annotation-driven>

AsyncConfig.java

@Configuration @EnableAsync public class AsyncConfig implements AsyncConfigurer { @Bean public AsyncTaskExecutor taskExecutor() { return new ConcurrentTaskExecutor(Executors.newCachedThreadPool()); } }

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