如何在batch-int：job-luniting-gateway中运行异步批处理作业？

Question

首先感谢大家的关注，

我在我的项目中结合了spring integration和spring batch，我想在batch-int:job-luniting-gateway中以异步方式启动作业，我的方法是输入通道中的每个消息以异步方式启动作业，而不是等待util完成作业，我的代码是：

 <batch-int:job-launching-gateway request-channel="outboundJobRequestChannel"
                                     reply-channel="jobLaunchReplyChannel"/>

@Bean
    public MapJobRepositoryFactoryBean jobRepositoryFactoryBean() {
        MapJobRepositoryFactoryBean fb = new MapJobRepositoryFactoryBean();
        return fb;
    }
 @Bean
    public JobLauncher jobLauncher() throws Exception {
        final SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
        jobLauncher.setJobRepository(jobRepositoryFactoryBean().getObject());
        final SimpleAsyncTaskExecutor simpleAsyncTaskExecutor = new SimpleAsyncTaskExecutor();
        jobLauncher.setTaskExecutor(simpleAsyncTaskExecutor);
        return jobLauncher;
    }

但不起作用，并抛出bellow异常：

Exception in thread "SimpleAsyncTaskExecutor-20" java.lang.NullPointerException
    at org.springframework.batch.core.repository.dao.MapJobExecutionDao.synchronizeStatus(MapJobExecutionDao.java:158)
    at org.springframework.batch.core.repository.support.SimpleJobRepository.update(SimpleJobRepository.java:161)
    at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy18.update(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor15.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:483)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
    at com.sun.proxy.$Proxy18.update(Unknown Source)
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:351)
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
    at java.lang.Thread.run(Thread.java:745)

Answer 1

简单地将OutboundJobRequestChannel更改为ExecutorChannel可能更容易。请参阅文档和此处。