I have yet to use it, but isn't Java EE's Batch API is used for things like this? It tracks the progress of long running tasks (e.g. the index of the current ma

I have yet to use it, but isn't Java EE's Batch API is used for things like this? It tracks the progress of long running tasks (e.g. the index of the current mail) and can continue from the last sent index in case of some error.