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我已经定义了一个运行一次就可以的 Spring Batch 作业。但是，由于 JOB_INSTANCE_ID 的主键中有重复条目，它无法第二次运行；

SEVERE: Job Terminated in error: PreparedStatementCallback; SQL [INSERT into    BATCH_JOB_INSTANCE(JOB_INSTANCE_ID, JOB_NAME, JOB_KEY, VERSION) values (?, ?, ?, ?)]; Duplicate entry '0' for key 'PRIMARY'; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '0' for key 'PRIMARY'

我读过这可以通过在作业中设置命令行参数来克服，例如

java -cp ${CLASSPATH} org.springframework.batch.core.launch.support.CommandLineJobRunner myJob.xml myJob date=20121025154016 -next

无论我是否包含 -next 参数，它都不会运行该作业。

我的 Spring Batch 配置如下所示（batch/launchContext.xml）；

<?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"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:jdbc="http://springframework.org/schema/jdbc"
    xsi:schemaLocation="http://www.springframework.org/schema/jdbc     http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd
    http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch.xsd
http://springframework.org/schema/jdbc http://springframework.org/schema/jdbc/spring-jdbc.xsd
    http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- Launch context: how to launch all of the jobs -->
    <!-- Expects a data source configuration file to be used, with a DataSource bean 
called "dataSource" -->

    <!-- The data source for the jobs status -->
    <import resource="dataSource.xml" />

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

    <bean
            id="incrementer"
            class="org.springframework.batch.core.launch.support.RunIdIncrementer" />

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

    <bean
            id="transactionManager"
            class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property
                    name="dataSource"
                    ref="dataSource" />
    </bean>

    <bean
            id="jobExplorer"       
class="org.springframework.batch.core.explore.support.JobExplorerFactoryBean">
            <property
                    name="dataSource"
                    ref="dataSource" />
    </bean>

</beans>

工作是这样的（在 myJob.xml 文件中）

....
<import resource="batch/launchContext.xml" />
...
    <batch:job
            id="myJob"
            job-repository="jobRepository"
            incrementer="incrementer">
            <batch:step id="step1">
                    <batch:tasklet transaction-manager="transactionManager">
                            <batch:chunk
                                    reader="myReader"
                                    processor="myProcessor"
                                    writer="myWriter"
                                    commit-interval="10" />
                    </batch:tasklet>
            </batch:step>
    </batch:job>

理想情况下，我希望每次运行作业都与运行日期/时间保持一致。有没有办法将启动器配置为自动执行此操作？

4

1 回答 1

7

我也将这个问题放在官方春季论坛上。我最终找到了自己的答案（一路上有提示）；

http://forum.springsource.org/showthread.php?131347-How-to-re-run-a-job&p=428484#post428484

简而言之，问题是我从这三个表中删除了值“0”；

  • BATCH_STEP_EXECUTION_SEQ
  • BATCH_JOB_EXECUTION_SEQ
  • BATCH_JOB_SEQ

因此，在清理 Spring Batch 元数据表时（例如，使用 truncate 或 delete from ...）确保之后运行以下命令；

INSERT INTO BATCH_STEP_EXECUTION_SEQ values(0);
INSERT INTO BATCH_JOB_EXECUTION_SEQ values(0);
INSERT INTO BATCH_JOB_SEQ values(0);
于 2012-10-30T08:15:59.837 回答