Spring Batch - Read once and write twice

Question

I am new to Spring Batch. My requirement is I have a reader which gets the records through a web service call/database call and currently I am writing those records to one table

Answer 1

Spring Batch defines independent steps for processing. Each step is responsible for their input, processing, and output. Because of this, I'd structure the job something like:

<job id="myJob">
    <step id="step1" next="step2">
        <tasklet>
            <chunk reader="reader" writer="typeAwriter"/>
        </tasklet>
    </step>
    <step id="step2">
        <tasklet>
            <chunk reader="reader" processor="processor" writer="typeBwriter"/>
        </tasklet>
    </step>
</job>

With the above configuration, the reader would be a step scoped reader that reads in type A. The typeAwriter writes out type A. The processor is the processor that converts type A to type B. The typeBwriter writes type B. Since the processor returns a list of type B, the typeBwriter would need to be a custom implementation that loops over the lists that the processor returns (typeBwriter would take a List<List<TypeB>>).