How to skip batch step when condition is false - spring-batch

Question

I have one basis job with one basic step. This jobs is executing every x second (I am using quartz for this). Then in my config class I also have variable "runStep". Where should I add this attribute and run my step only if runStep is true ?
<batch:job id="export1" parent="baseJob">
<batch:step id="registruj" parent="baseStep">
<tasklet>
<chunk reader="registrujReader" processor="registrujProcessor" writer="registrujWriter"
commit-interval="1" />
</tasklet>
</batch:step>
</batch:job>
<bean id="baseJob" class="org.springframework.batch.core.job.SimpleJob" abstract="true">
<property name="jobRepository" ref="jobRepository" />
</bean>
<bean id="baseStep" class="org.springframework.batch.core.step.factory.SimpleStepFactoryBean" abstract="true">
<property name="transactionManager" ref="transactionManager" />
<property name="jobRepository" ref="jobRepository" />
<property name="startLimit" value="100" />
<property name="commitInterval" value="1" />
</bean>
<bean id="jobRepository" class="org.springframework.batch.core.repository.support.JobRepositoryFactoryBean"
p:dataSource-ref="expDataSource" p:transactionManager-ref="transactionManager" />
<bean id="jobLauncher" class="org.springframework.batch.core.launch.support.SimpleJobLauncher">
<property name="jobRepository" ref="jobRepository" />
</bean>
<bean class="org.springframework.batch.core.configuration.support.JobRegistryBeanPostProcessor">
<property name="jobRegistry" ref="jobRegistry" />
</bean>
<bean id="jobRegistry" class="org.springframework.batch.core.configuration.support.MapJobRegistry" />
<bean id="registrujWriter" class="cz.isvs.reg.rob.util.export.batch.RegistrujItemWriter" scope="step" />
<bean id="registrujReader" class="cz.isvs.reg.rob.util.export.batch.RegistrujItemReader" scope="step" />
<bean id="registrujProcessor" class="cz.isvs.reg.rob.util.export.batch.RegistrujItemProcessor" scope="step" />
<!-- run every 10 seconds -->
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
<property name="triggers">
<bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
<property name="jobDetail" ref="jobDetail" />
<property name="cronExpression" value="*/10 * * * * ?" />
</bean>
</property>
</bean>
<bean id="jobDetail" class="org.springframework.scheduling.quartz.JobDetailBean">
<property name="jobClass" value="cz.isvs.reg.rob.util.export.batch.JobLauncherDetails" />
<property name="group" value="quartz-batch" />
<property name="jobDataAsMap">
<map>
<entry key="jobName" value="export1" />
<entry key="jobLocator" value-ref="jobRegistry" />
<entry key="jobLauncher" value-ref="jobLauncher" />
</map>
</property>
</bean>

Answer 1

Use a JobExecutionDecider
public class RunStepDecider implements JobExecutionDecider {
public FlowExecutionStatus decide(JobExecution jobExecution, StepExecution stepExecution) {
final String runStep = jobExecution.getJobParameters().getString("runStep");
//Depending on the above condition you can return Completed or Failed.
return new FlowExecutionStatus.COMPLETED;
}
}
<batch:job id="export1" parent="baseJob">
<decision id="decision" decider="decider">
<next on="COMPLETED" to="registruj" />
</decision>
<batch:step id="registruj" parent="baseStep">
<tasklet>
<chunk reader="registrujReader" processor="registrujProcessor" writer="registrujWriter" commit-interval="1" />
</tasklet>
</batch:step>
</batch:job>
<bean id="decider" class="RunStepDecider" />
and pass runStep as JobParameter.
Hope can help to solve your problem.