Passing the “resources” property value to multiResourceReader from previous step in spring batch

[Aruna Ponaka]

I need to read csv files from a folder and write to DB, also archive the files. Below is the job described in xml

    <job id="importJob" xmlns="http://www.springframework.org/schema/batch">
    	      <step id="validateFileStep" >
    			<tasklet ref="validateFileTasklet" />			 
    			  <next on="*" to="importFileStep" />
                  <next on="FAILED" to="archiveFileStep" />               
    		</step>  
    	<step id="importFileStep"  next="archiveFileStep">     		
    			<tasklet>
    				<chunk reader="multiResourceReader" writer="csvWriter"
    					commit-interval="1" >					
    				</chunk>
    			</tasklet>
    		</step>
    		<step id="archiveFileStep">
    			<tasklet ref="archiveFileTasklet" />
    		</step>     		
    	</job>

multiResourceReader bean definition

   

<bean id="multiResourceReader"	class="org.springframework.batch.item.file.MultiResourceItemReader" scope="step">
    	<property name="resources" value="classpath:data/*.csv" />
    	<property name="delegate" ref="csvReader" />
      </bean>

The code is working fine, but instead of providing the "resources" property value in xml, i need to get it from "validateFileStep" step, as the reader should read only those csv files which are formatted properly. I should pass the same to archiveFileStep also, so that name the files can be appended with completed or failed in the archive accordingly.

Below is the reader bean def

<bean id="csvReader" class="org.springframework.batch.item.file.FlatFileItemReader"
		scope="step">
   <!-- property to skip the headers, as no headers in CSV, value is 0 -->
    <property name="linesToSkip" value="0" />       
    <property name="lineMapper">
        <bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">

            <property name="lineTokenizer">
                <bean
                    class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
                    <property name="delimiter" value="," />
                    <!-- Names of the CSV columns -->
                    <property name="names"
                        value="id,name,city" />
                </bean>
            </property>

            <property name="fieldSetMapper">
                <bean
                    class="com.common.service.csvFieldSetMapper" />
            </property>
        </bean>
    </property>
</bean>