java - Spring-Batch没有将元数据持久化到数据库？

我想创建一个spring-batch作业，但是我想在没有任何数据库持久性的情况下运行它。不幸的是，spring-batch需要以某种方式将作业周期的metadata写入数据库，从而促使我至少提供某种类型的具有transactionmanager和Entitymanager的数据库。

是否可以防止元数据并独立于txmanagers和数据库运行？

更新:

ERROR org.springframework.batch.core.job.AbstractJob: Encountered fatal error executing job
java.lang.NullPointerException
    at org.springframework.batch.core.repository.dao.MapJobExecutionDao.synchronizeStatus(MapJobExecutionDao.java:158) ~[spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at org.springframework.batch.core.repository.support.SimpleJobRepository.update(SimpleJobRepository.java:161) ~[spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_51]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_51]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98) ~[spring-tx-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262) ~[spring-tx-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95) ~[spring-tx-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at com.sun.proxy.$Proxy134.update(Unknown Source) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_51]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_51]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) ~[spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) ~[spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at com.sun.proxy.$Proxy134.update(Unknown Source) ~[?:?]
    at org.springframework.batch.core.job.AbstractJob.updateStatus(AbstractJob.java:416) ~[spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:299) [spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135) [spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50) [spring-core-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128) [spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_51]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_51]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_51]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_51]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) [spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) [spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) [spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127) [spring-batch-core-3.0.1.RELEASE.jar:3.0.1.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) [spring-aop-4.0.6.RELEASE.jar:4.0.6.RELEASE]
    at com.sun.proxy.$Proxy50.run(Unknown Source) [?:?]

最佳答案

只需创建一个没有数据源的配置即可进行批处理配置:

@Configuration
@EnableAutoConfiguration
@EnableBatchProcessing
public class BatchConfiguration extends DefaultBatchConfigurer {

    @Override
    public void setDataSource(DataSource dataSource) {
        // override to do not set datasource even if a datasource exist.
        // initialize will use a Map based JobRepository (instead of database)
    }

}

它将使用基于内存映射的实现来初始化JobRepository和JobExplorer。
https://github.com/spring-projects/spring-batch/blob/342d27bc1ed83312bdcd9c0cb30510f4c469e47d/spring-batch-core/src/main/java/org/springframework/batch/core/configuration/annotation/DefaultBatchConfigurer.java#L84

即使使用Spring Boot自动配置，您也可以使用生产数据源。