问题描述
在我的项目中,我用Spring Batch 2.2编写了一个Quartz调度程序.
根据我的要求,我想运行一个调度程序以获取应用程序的config属性,以刷新所有GlassFish群集上的配置缓存.
因此,我不需要用于文件读/写操作的ItemWriter和ItemReader.因此,我可以从中删除 ItemReader 和 ItemWriter 吗?
我的工作配置如下:
<batch:job id="reportJob">
<batch:step id="step1">
<batch:tasklet>
<!--I want to remove ItemReader and ItemWriter as its not used -->
<batch:chunk reader="ItemReader" writer="ItemWriter"
commit-interval="10">
</batch:chunk>
</batch:tasklet>
</batch:step>
<batch:listeners>
<batch:listener ref="simpleListener"/>
</batch:listeners>
</batch:job>
<bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailBean">
<!-- Cache Refresh code is written here : JobLauncherDetails.java file -->
<property name="jobClass" value="com.mkyong.quartz.JobLauncherDetails" />
<property name="group" value="quartz-batch" />
<property name="jobDataAsMap">
<map>
<entry key="jobName" value="reportJob" />
<entry key="jobLocator" value-ref="jobRegistry" />
<entry key="jobLauncher" value-ref="jobLauncher" />
<entry key="param1" value="mkyong1" />
<entry key="param2" value="mkyong2" />
</map>
</property>
</bean>
我编写了业务逻辑以刷新JobClass JobLauncherDetails.java上的缓存.因此可以删除ItemReader和ItemWriter吗?我们有其他可能的替代方法吗?
使用
<job id="reportJob">
<step id="step1">
<tasklet ref="MyTaskletBean" />
</step>
<!-- Other config... -->
</job>
class MyTasklet implements Tasklet {
@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
}
}
您可以从官方文档
In my project, I have written a Quartz scheduler with Spring Batch 2.2.
As per my requirement, I want to run a scheduler to fetch application config property to refresh the configuration cache on all the GlassFish Clusters.
So I dont need ItemWriter and ItemReader which are used to for File Read/Write operations.So can I remove ItemReader and ItemWriter from ?
The configuration of my job is mentioned below :
<batch:job id="reportJob">
<batch:step id="step1">
<batch:tasklet>
<!--I want to remove ItemReader and ItemWriter as its not used -->
<batch:chunk reader="ItemReader" writer="ItemWriter"
commit-interval="10">
</batch:chunk>
</batch:tasklet>
</batch:step>
<batch:listeners>
<batch:listener ref="simpleListener"/>
</batch:listeners>
</batch:job>
<bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailBean">
<!-- Cache Refresh code is written here : JobLauncherDetails.java file -->
<property name="jobClass" value="com.mkyong.quartz.JobLauncherDetails" />
<property name="group" value="quartz-batch" />
<property name="jobDataAsMap">
<map>
<entry key="jobName" value="reportJob" />
<entry key="jobLocator" value-ref="jobRegistry" />
<entry key="jobLauncher" value-ref="jobLauncher" />
<entry key="param1" value="mkyong1" />
<entry key="param2" value="mkyong2" />
</map>
</property>
</bean>
I writing my business logic to refresh cache on JobClass JobLauncherDetails.java.So is it possible to remove ItemReader and ItemWriter ? Do we have any possible alternative way ?
Use a Tasklet
<job id="reportJob">
<step id="step1">
<tasklet ref="MyTaskletBean" />
</step>
<!-- Other config... -->
</job>
class MyTasklet implements Tasklet {
@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
}
}
You can read more on Tasklet at chapter 5.2 from official doc
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