自定义TransactionManger集不适用于春季批处理

Question

我对Spring Boot和批处理非常陌生。 我们正在尝试将spring batch集成到我们现有的spring boot REST应用程序中，以添加将csv文件中的数据持久存储到oracle数据库中的功能。

我试图通过扩展BatchConfigurer在我的BatchConfiguration文件中配置数据源和transactionManager，如下所示。我正在调用一种服务方法来将数据持久保存到IteamProcessor中的数据库。但工作失败，出现以下异常。您能帮我解决此问题，并指导我在春季批处理中设置现有的数据源和事务管理器吗？

2019-05-13 11:14:51,689 LL="ERROR" source=batchprocessor CR="" RE="" DE="" TR="scheduling-1" LN="o.s.b.c.s.AbstractStep"    MSG=Encountered an error executing step process-consumers-step in job consumers-batch-loader
org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.transaction.PlatformTransactionManager' available: expected single matching bean but found 2: transactionManager,customTransactionManager
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1139)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveBean(DefaultListableBeanFactory.java:407)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:341)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:335)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.determineTransactionManager(TransactionAspectSupport.java:394)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:284)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688)
        at com.sample.batchprocessor.model.ConsumerWhitelistService$$EnhancerBySpringCGLIB$$8061a132.updateWhitelist(<generated>)
        at com.sample.batchprocessor.config.Processor.process(Processor.java:50)
        at com.sample.batchprocessor.config.Processor.process(Processor.java:1)
        at org.springframework.batch.core.step.item.SimpleChunkProcessor.doProcess(SimpleChunkProcessor.java:129)
        at org.springframework.batch.core.step.item.SimpleChunkProcessor.transform(SimpleChunkProcessor.java:306)
        at org.springframework.batch.core.step.item.SimpleChunkProcessor.process(SimpleChunkProcessor.java:205)
        at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:75)
        at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:407)
        at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:331)
        at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:140)
        at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:273)
        at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:82)
        at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:375)
        at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
        at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:145)
        at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:258)
        at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:203)
        at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
        at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:399)
        at org.springframework.batch.core.job.SimpleJob.doExecute(SimpleJob.java:135)
        at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:313)
        at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:144)
        at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
        at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:137)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:343)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:198)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
        at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
        at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
        at com.sun.proxy.$Proxy139.run(Unknown Source)
        at com.sample.batchprocessor.config.BatchJobLauncher.load(BatchJobLauncher.java:44)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
        at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
2019-05-13 11:14:51,722 LL="INFO" source=batchprocessor CR="" RE="" DE="" TR="scheduling-1" LN="o.s.b.c.l.s.SimpleJobLauncher"    MSG=Job: [SimpleJob: [name=consumers-batch-loader]] completed with the following parameters: [{Time=1557771291413}] and the following status: [FAILED]

代码：

@Configuration
@EnableBatchProcessing
@EnableTransactionManagement
public class BatchConfiguration implements BatchConfigurer {

    private JobRepository jobRepository;
    private JobExplorer jobExplorer;
    private JobLauncher jobLauncher;

    @Autowired(required=true)
    @Qualifier("customEntityManagerFactory")
    EntityManagerFactoryBean merchantEntityManagerFactory;

    @Autowired(required = true)
    @Qualifier("customTransactionManager")
    PlatformTransactionManager transactionManager;

    @Override
    public JobRepository getJobRepository() throws Exception {
        return this.jobRepository;
    }   

    @Override
    public JobLauncher getJobLauncher() throws Exception {
        return this.jobLauncher;
    }

Answer 1

似乎您的配置不完整。我可以看到您正在实现BatchConfigurer以创建自定义存储库。

下面是一些示例代码，可帮助您了解配置中缺少的内容

//Data source configuration for H2
@Bean
public DataSource dataSource(){
    EmbeddedDatabaseBuilder embeddedDatabaseBuilder = new EmbeddedDatabaseBuilder();
    return embeddedDatabaseBuilder
            .addScript("classpath:employee.sql") // Add your sqlscripts in properties
            .setType(EmbeddedDatabaseType.H2)
            .build();
}

//creating JobRepository
@Override
public JobRepository getJobRepository() throws Exception {
    JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
    factory.setDataSource(dataSource());
    factory.setTransactionManager(getTransactionManager());
    factory.afterPropertiesSet();
    return  factory.getObject();
}


@Override
public PlatformTransactionManager getTransactionManager() throws Exception {
    return new ResourcelessTransactionManager();
}

@Override
public JobLauncher getJobLauncher() throws Exception {
    SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
    jobLauncher.setJobRepository(getJobRepository());
    jobLauncher.afterPropertiesSet();
    return jobLauncher;
}

@Override
public JobExplorer getJobExplorer() throws Exception {
    return null;
}

希望这会有所帮助。