Remote Chunking scope="step" dependencies on remote slaves

[dpeker]

Currently we are trying to implement Remote Chunking and the processor/writer that is implemented to run on slave nodes has scope="step" dependency. This is causing the exception as the following. I'am wondering if any one has any suggestion to how to resolve this.

Exception :

org.springframework.beans.factory.BeanCreationExce ption: Error creating bean with name 'scopedTarget.updatePositionSchedule': Scope 'step' is not active for the current thread; consider defining a scoped proxy for this bean if you intend to refer to it from a singleton; nested exception is java.lang.IllegalStateException: No context holder available for step scope
at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean(AbstractBeanFactory.java:339 )
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:190)

Related slave node configuration.

<bean id="slaveChunkHandler" class="org.springframework.batch.integration.chunk .ChunkProcessorChunkHandler">
<property name="chunkProcessor" >
<bean class="org.springframework.batch.core.step.item.Si mpleChunkProcessor">
<property name="itemWriter" ref="PositionItemWriter"/>
<property name="itemProcessor">
<bean class="org.springframework.batch.item.support.Pass ThroughItemProcessor"/>
</property>
</bean>
</property>
</bean>

<bean id="PositionItemWriter"
class="org.springframework.batch.item.support.Comp ositeItemWriter">
<property name="delegates">
<list>
<ref bean="updatePositionSchedule"/>
</list>
</property>
</bean>

<bean id="updatePositionSchedule" scope="step"
class="com.xyz.batch.writer.PositionScheduleItemWr iter">
<property name="calcRequest" value="#{jobExecutionContext['calcRequest']}"/>
</bean>

[dpeker]

Any one has any solution for this issue?
I also see that in RemoteChunkHandlerFactoryBean.java has the following comment on line no:142
Is there any plan to provide the implementation in this class to create step context for the processor in case it has scope="step" dependencies? I think that would resolve this step scope issue java.lang.IllegalStateException: No context holder available for step scope

ChunkProcessorChunkHandler<T> handler = new ChunkProcessorChunkHandler<T>();
setNonBuffering(chunkProcessor);
handler.setChunkProcessor(chunkProcessor);
// TODO: create step context for the processor in case it has
// scope="step" dependencies
handler.afterPropertiesSet();

return handler;

[mminella]

Your comment on that note is correct in that the framework currently does not support the injection of remote step scoped dependencies. I did a quick search for a Jira item related to that and did not find one so I created it. You can follow it's progress here: https://jira.springsource.org/browse/BATCHADM-148

As always, contributions are happily accepted!