如何从XML Spring调度配置转向注释/代码配置？

Question

我试图将以下Spring任务xml配置转换为纯粹基于代码/注释的版本:

<task:executor id="xyz.executor"
    pool-size="${xyz.job.executor.pool.size:1-40}"
    queue-capacity="${xyz.job.executor.queue.capacity:0}"
    rejection-policy="CALLER_RUNS"/>

<task:scheduler id="xyz.scheduler" pool size="${xyz.job.scheduler.pool.size:4}"  />

<task:annotation-driven executor="xyz.executor" scheduler="xyz.scheduler" />

<bean id='xyzProcessor' class="xyz.queueing.QueueProcessor" /> 

<task:scheduled-tasks scheduler="xyz.scheduler" >
    <task:scheduled ref="partitioner" method="createPartitions" cron="${xyz.job.partitioner.interval:0 0 3 * * *}" />
</task:scheduled-tasks>

根据Spring规范28.4.1(http://docs.spring.io/spring/docs/current/spring-framework-reference/html/scheduling.html),他们说要像这样从XML 转发:

<task:annotation-driven executor="myExecutor" scheduler="myScheduler"/>
<task:executor id="myExecutor" pool-size="5"/>
<task:scheduler id="myScheduler" pool-size="10"/>

代码配置就像启用@EnableScheduling和/或@EnableAsync一样简单.

但是,我没有看到任何可以实际实例化调度程序的地方.@EnableScheduling的javadoc(http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/scheduling/annotation/EnableScheduling.html)展示了如何插入我自己创建的Executor,虽然我不确定它应该是什么类(我仍然希望能够控制池大小,队列容量和拒绝策略).它还显示了如何使用configureTasks覆盖来调度我的createPartitions方法.但是,我希望能够命名我的调度程序(以便我可以识别其线程)并控制其池大小.

所以,我想知道这些事情:

1)我可以使用哪个类来设置XML所具有的执行程序字段？

2)有没有办法创建一个我可以控制名称和池大小的调度程序实例？

Answer 1

退房的类型AsyncConfigurer,AsyncConfigurerSupport和SchedulingConfigurer.它们是辅助类型,可用于@Configuration通过异步/调度配置增强类.

在所有这些和javadoc中@EnabledAsync,您将找到设置异步/调度@Configuration类所需的所有设置方法.

给出的例子等同于

 @Configuration
 @EnableAsync
 public class AppConfig implements AsyncConfigurer {

     @Bean
     public MyAsyncBean asyncBean() {
         return new MyAsyncBean();
     }

     @Override
     public Executor getAsyncExecutor() {
         ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
         executor.setCorePoolSize(7);
         executor.setMaxPoolSize(42);
         executor.setQueueCapacity(11);
         executor.setThreadNamePrefix("MyExecutor-");
         executor.initialize();
         return executor;
     }

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

同

 <beans>
     <task:annotation-driven executor="myExecutor" exception-handler="exceptionHandler"/>
     <task:executor id="myExecutor" pool-size="7-42" queue-capacity="11"/>
     <bean id="asyncBean" class="com.foo.MyAsyncBean"/>
     <bean id="exceptionHandler" class="com.foo.MyAsyncUncaughtExceptionHandler"/>
 </beans>

SchedulingConfigurer有一个类似的设置task:scheduler.