Question

我正在尝试配置我的第一个多线程作业。我们有一个大约200,000条记录的主文件，我们需要处理这些记录。我想将文件分解为10个文件并处理它们。拆分文件tasklet工作正常＆amp;它将错误文件拆分为10个较小的文件。我将文件的路径传递给作业参数键中的作业“urlFilesPath”，值为“file：/ scrapper / spliturl *”。我确认在 MultiResourcePartitioner bean中正确读取了文件。

主步骤在我的配置中运行，但从属步骤未运行。以下是我的配置。

分区：

<bean id="partitioner"
    class="org.springframework.batch.core.partition.support.MultiResourcePartitioner"
    scope="step">
    <property name="resources" value="#{jobParameters['urlFilesPath']}" />
</bean>

MultiResourceItemReader：

<bean id="multiResourceItemReader"
    class="org.springframework.batch.item.file.MultiResourceItemReader"
    scope="step">
    <property name="resources" value="#{jobParameters['urlFilesPath']}" />
    <property name="delegate" ref="urlFileItemReader" />
    <property name="strict" value="true" />
    <property name="saveState" value="false" />
</bean>

FlatFileItemWriter：

<bean id="urlFileItemReader" class="org.springframework.batch.item.file.FlatFileItemReader"
scope="step">
    <property name="lineMapper" ref="passThroughLineMapper" />      
    <property name="resource" value="#{stepExecutionContext['fileName']}" /> 
    <property name="saveState" value="true" /> 
</bean>

作业配置：

<batch:job id="importJob" job-repository="jobRepository">
    <batch:step id="fileSplitter" next="readURLFileRunner">
        <batch:tasklet ref="fileSplittingTasklet"
            transaction-manager="transactionManager" />
    </batch:step>

    <batch:step id="readURLFileRunner">
        <batch:partition step="readURLFile" partitioner="partitioner">
            <batch:handler grid-size="10" task-executor="taskExecutor" />
        </batch:partition>
    </batch:step>
</batch:job>

从属步骤配置：

<batch:step id="readURLFile">
    <batch:tasklet transaction-manager="transactionManager"
        task-executor="taskExecutor" throttle-limit="10">
        <batch:chunk reader="multiResourceItemReader" processor="urlFileItemProcessor"
            writer="validURLItemWriter" commit-interval="200" skip-limit="100">
            <batch:skippable-exception-classes>
                <batch:include class="java.net.MalformedURLException" />
                <batch:include class="java.net.URISyntaxException" />
                <batch:include class="java.net.UnknownHostException" />
            </batch:skippable-exception-classes>
        </batch:chunk>
        <batch:listeners>
            <batch:listener ref="malformedURLExceptionListener" />
            <batch:listener ref="uriSyntaxExceptionListener" />
            <batch:listener ref="unknownHostExceptionListener" />
        </batch:listeners>
    </batch:tasklet>
    <batch:end on="COMPLETED" />
</batch:step>

请告诉我我做错了什么。我没有看到处理器 urlFileItemProcessor ＆amp;编写器 validURLItemWriter 正在执行。

更新我按照@dimzak给出的答案。但是我仍然没有看到 urlFileItemProcessor ＆amp;的执行步骤 readURLFile 和记录器 validURLItemWriter 不会打印到控制台。该作业在以下记录器之后挂起

org.springframework.batch.repeat.support.TaskExecutorRepeatTemplate - Starting repeat context.

我对我配置步距的方式有疑问。

StepScope配置

<bean class="org.springframework.batch.core.scope.StepScope">
    <property name="autoProxy" value="true"/>
    <property name="proxyTargetClass" value="true"/>
</bean>

在Spring论坛上，我已经读过 multiResourceItemReader 的委托属性不需要步骤作用域。当我从 urlFileItemReader 中删除 scope =“step”时，我得到以下异常。

    INFO : 26 Sep 2014 00:10:58,811 - org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor - Initializing ExecutorService  'taskExecutor'
INFO : 26 Sep 2014 00:10:59,066 - org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor - Shutting down ExecutorService 'taskExecutor'
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'urlFileItemReader' defined in class path resource [beansBatchService.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 0): Field or property 'stepExecutionContext' cannot be found on object of type 'org.springframework.beans.factory.config.BeanExpressionContext'
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)
    at com.chw.hma.service.batch.jobrunner.MainJobRunner.run(MainJobRunner.java:29)
    at com.chw.hma.service.batch.jobrunner.MainJobRunner.main(MainJobRunner.java:21)
Caused by: org.springframework.beans.factory.BeanExpressionException: Expression parsing failed; nested exception is org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 0): Field or property 'stepExecutionContext' cannot be found on object of type 'org.springframework.beans.factory.config.BeanExpressionContext'
    at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate(StandardBeanExpressionResolver.java:146)
    at org.springframework.beans.factory.support.AbstractBeanFactory.evaluateBeanDefinitionString(AbstractBeanFactory.java:1364)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.evaluate(BeanDefinitionValueResolver.java:214)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:186)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1456)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    ... 12 more
Caused by: org.springframework.expression.spel.SpelEvaluationException: EL1008E:(pos 0): Field or property 'stepExecutionContext' cannot be found on object of type 'org.springframework.beans.factory.config.BeanExpressionContext'
    at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:217)
    at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:85)
    at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:78)
    at org.springframework.expression.spel.ast.CompoundExpression.getValueRef(CompoundExpression.java:49)
    at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:85)
    at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:102)
    at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:94)
    at org.springframework.context.expression.StandardBeanExpressionResolver.evaluate(StandardBeanExpressionResolver.java:143)
    ... 18 more

请告知。

2014年9月27日更新

根据@dimzak

的建议发布任务执行人等

<bean id="taskExecutor"
    class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
    <property name="corePoolSize" value="10" />
    <property name="maxPoolSize" value="10" />
</bean>

<bean id="jobRepository"
    class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean">
    <property name="transactionManager" ref="transactionManager" />
    <property name="dataSource" ref="dataSource" />
    <property name="databaseType" value="mySQL" />
</bean>

<bean id="jobLauncher"
    class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
    <property name="jobRepository" ref="jobRepository" />
    <property name="taskExecutor" ref="taskExecutor" />
</bean>

Answer 1

MultiResourcePartitioner接受file:/scrapper/spliturl*并在不同的步骤中将每个文件拆分为spliturl1，spliturl2。

然后，在从属步骤中，您必须只读取此步骤的特定文件。因此，您的配置应该没有MultiResourceItemReader。

<batch:step id="readURLFile">
    <batch:tasklet transaction-manager="transactionManager"
        task-executor="taskExecutor" throttle-limit="10">
        <batch:chunk reader="urlFileItemReader" processor="urlFileItemProcessor"
            writer="validURLItemWriter" commit-interval="200" skip-limit="100">
            <batch:skippable-exception-classes>
                <batch:include class="java.net.MalformedURLException" />
                <batch:include class="java.net.URISyntaxException" />
                <batch:include class="java.net.UnknownHostException" />
            </batch:skippable-exception-classes>
        </batch:chunk>
        <batch:listeners>
            <batch:listener ref="malformedURLExceptionListener" />
            <batch:listener ref="uriSyntaxExceptionListener" />
            <batch:listener ref="unknownHostExceptionListener" />
        </batch:listeners>
    </batch:tasklet>
    <batch:end on="COMPLETED" />
</batch:step>

Spring Batch分区步骤未运行

1 个答案: