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I created a job which splits my file into small chunks and all these chunks are read in the separated steps. For ex. 3 steps are finished without any errors and the records are commited to the database, but if 4th step fails I need to rollback all records from previous step. Is it possible to rollback them somehow?
Or perhaps there is a possibility to commit all records only when the last step was finished correctly? (But here is problem with large files)
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Spring Batch uses chunk oriented style of processing which is reading data one at a time, and creating chunks that will be written out within a transaction. The item is read by ItemReader and passed onto ItemProcessor, then it is written out by ItemWriter once the item is ready.
– Open Spring Tool Suite, on main menu, choose File->New->Spring Starter Project, input project info. Press Next then Finish, a Spring Boot project will be created successfully.
To terminate a step you have to return null from ItemReader. read() so when you process an old object you can set a flag into step-execution context and use it to: prevent other items of current chunk to be processed. prevent chunk processed item writing.
Don't play with transaction while using spring batch; due to its transactional nature is a really bad idea manually manage transaction.
See Transaction Management in Spring batch or Spring batch - One transaction over whole Job for further explanation
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