Question

不能停止弹簧批处理步骤..

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:batch="http://www.springframework.org/schema/batch"
    xsi:schemaLocation="
    http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch-2.1.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">

    <description>Example job to get you started. It provides a skeleton for a typical batch application.</description>
<bean id="HelloTasklet" class="c.c.c.HelloTasklet" scope="step"/>
<bean id="completionPolicy" class="org.springframework.batch.repeat.policy.DefaultResultCompletionPolicy"/> 
<bean id="chunkTimeout" class="org.springframework.batch.repeat.policy.TimeoutTerminationPolicy">
    <constructor-arg value="3"/>
</bean>
<bean id="commitCount" class="org.springframework.batch.repeat.policy.SimpleCompletionPolicy">
    <property name="chunkSize" value="200" />
</bean>
<bean id="chunkCompletionPolicy" class="org.springframework.batch.repeat.policy.CompositeCompletionPolicy">
    <property name="policies">
    <list>
        <ref bean="chunkTimeout" />
        <ref bean="commitCount" />
    </list>
    </property>
</bean>
<bean id="RandomChunkSizePolicy" class="c.c.c.RandomChunkSizePolicy"/>
<job id="importInvoices"  xmlns="http://www.springframework.org/schema/batch">  
<listeners>
<listener ref="loggingListener"/>
</listeners>
    <step id="vehicleStep" next="hello">
    <tasklet>
        <chunk reader="vehicleReader"  writer="vehicleWriter" chunk-completion-policy="RandomChunkSizePolicy"/>
    </tasklet>
</step>
    <step id="hello" next="decompress">
        <tasklet ref="HelloTasklet" />
    </step>

    <step id="decompress" next="readWriteInvoices">
        <tasklet ref="decompressTasklet" />
    </step>
    <step id="readWriteInvoices">
        <tasklet>
            <chunk reader="reader" writer="writer" commit-interval="100" />
        </tasklet>  
    </step>
</job>
 <bean id="loggingListener" class="c.c.c.JobLoggerListener"></bean>
<bean id="decompressTasklet" class="c.c.c.DecompressTasklet">
    <property name="inputResource" value="file:./input/input.zip" /> 
    <property name="targetDirectory" value="./work/output/" /> 
    <property name="targetFile" value="invoices.txt" /> 
</bean>
<bean id="reader" class="org.springframework.batch.item.file.FlatFileItemReader">
    <property name="resource" value="file:./work/output/invoices.txt" />
    <property name="linesToSkip" value="1" />
    <property name="lineMapper">
        <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
            <property name="lineTokenizer">
                <bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
                    <property name="names" value="INVOICE_ID,CUSTOMER_ID,DESCRIPTION,ISSUE_DATE,AMOUNT" />
                </bean>
            </property>
            <property name="fieldSetMapper">
                <bean class="c.c.c.InvoiceFieldSetMapper" /> 
            </property>
        </bean>
    </property>
</bean>
<bean id="writer" class="c.c.c.InvoiceJdbcItemWriter">
    <constructor-arg ref="dataSource" />
</bean> 
</beans>

并在输入中看到这一点：

The chunk size has been set to 2
Reader
Reader
Writer
[reeeeader, reeeeader]

The chunk size has been set to 2
Reader
Reader
Writer
[reeeeader, reeeeader]

The chunk size has been set to 2
Reader
Reader
Writer
[reeeeader, reeeeader]

..等等。需要建议。

Answer 1

只有在ItemReader实现中读取空值时，步骤才会停止。您需要确保读取器实现在某个时间点读取并返回null。然后该步骤将自行停止。

无法停止弹簧批量步骤

1 个答案: