Spring Batch - reading multiple PDF files and passing them to ItemProcessor - spring

Question

I would like to read a multiple pdf files and process them one by one.
I use MultiResourceItemReader and a custom delegate:
public class MyItemReader implements ResourceAwareItemReaderItemStream<MyItem> {
private Resource resource;
#Override
public MyItem read() throws Exception, UnexpectedInputException, ParseException, NonTransientResourceException {
return null; //create MyItem
}
#Override
public void setResource(Resource resource) {
this.resource = resource;
}
#Override
public void open(ExecutionContext executionContext) throws ItemStreamException {
}
#Override
public void update(ExecutionContext executionContext) throws ItemStreamException {
}
#Override
public void close() throws ItemStreamException {
}
}
The problem I have is that the read method is ivoked infinitly and my ItemProcessor is not invoked.
The resources property is correctly set - files are set.
Could anyone explain me this? Thanks in advance.
I finally decided to use ResourcesItemReader instead of MultiResourceItemReader with custom delegate. This solution is simpler.
<!--suppress SpringBatchModel -->
<batch:job id="my-import">
<batch:step id="myFileStep">
<batch:tasklet>
<batch:chunk reader="resourcesItemReader"
processor="sddeImportProcessor"
writer="sddeImportJpaItemWriter"
commit-interval="${commit.interval:500}"/>
</batch:tasklet>
</batch:step>
<batch:listeners>
<batch:listener ref="sftpImportExecutionListener"/>
<batch:listener ref="longRunningJobExecutionNotificator"/>
<batch:listener ref="exitStatusJobExecutionListener"/>
<batch:listener ref="afterJobExecutionMailSender"/>
</batch:listeners>
</batch:job>
<bean id="sftpImportExecutionListener"
class="my.batches.shared.listener.SftpImportJobListener">
<constructor-arg name="ftsReadService" ref="ftsReadService"/>
<constructor-arg name="ftsWriterService" ref="ftsWriterService"/>
<constructor-arg name="localDir" value="${voe.batch.sdde.unterschriftenblatt.import.local.folder}"/>
<constructor-arg name="remoteDir" value="${voe.batch.sdde.unterschriftenblatt.import.remote.folder}"/>
<constructor-arg name="multipleFilesImport" value="true" />
</bean>
<bean id="resourcesItemReader" class="org.springframework.batch.item.file.ResourcesItemReader" scope="step">
<property name="resources" value="#{jobExecutionContext['import.input.file.path']}"/>
</bean>
<bean id="myImportProcessor" class="my.MyProcessor">
<property name="myUpdateService" ref="defaultUpdateService" />
</bean>
<bean id="myImportJpaItemWriter" class="org.springframework.batch.item.database.JpaItemWriter">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>