It looks like ItemReader as the methods open(), readItem(), close() so it knows about it’s lifecycle. The similar is the case for ItemWriter. However ItemProcessor and Batchlet look completely agnostic.

To more flexibly juggle existing code for chunk based batchlet execution, I’d like to chain multiple item processors such that the output of one is the input of the next. The whole chunk step should look like

To more flexibly juggle existing code for chunk based batchlet execution, I’d like to chain multiple item processors such that the output of one is the input of the next. The whole chunk step should look like