Gaetan Chaboussie created OFBIZ-13282:
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Summary: JobTracker object
Key: OFBIZ-13282
URL: https://issues.apache.org/jira/browse/OFBIZ-13282
Project: OFBiz
Issue Type: Improvement
Components: framework/service
Affects Versions: Upcoming Branch
Reporter: Gaetan Chaboussie
Hello community,
We recently got a client with an interesting need, and began reflecting on it
(Nicolas and I).
The need is the following : be able to easily follow the advancement of a very
large process.
For example, when an operator launches the generation of three thousands
invoices, they want to be able to see how many have been treated, have an
estimate on how long it would take, rerun the failed generations, how many
failed so far, etc.
To this end, we started the development of what we called the JobTracker.
The idea is the following:
* I launch the top service that plans all the unit generation jobs. This top
service uses a dedicated engine (TrackedServiceEngine) that inits and injects a
JobTracker object in the context.
** You can check the `testTrackedServiceAreTracked` unit test for an example
implementation.
* The JobTracker object has its corresponding persisting entity, that allows
it to be retrieved from anywhere in the framework, associated with the
JobTrackerFactory and its cache.
* Each of the generating services is watched by the JobTracker object. At the
end of each unit job, there is a check for the status of the whole list of
tracked jobs to check completion.
* When all the jobs have been run, the JobTracker status switches to complete.
* Any time during the process of the list of unit jobs, the tracker can be
accessed, and gathers all of the data of the jobs linked to it. It can (for
example) give the completion percentage of the generation process.
* At the end of each job, the result of the job can be stored in a dedicated
new entity TrackedJobResult. This entity stores the Job final status, potential
error messages, and can be extended for storing business related data, useful
in a lot of ways. We didn’t use JobSandbox to store the result because they are
automatically purged after some time.
If you want to test it for yourself, you can run the ‘ServiceForTestingTracker’
service that uses the description above.
You can then go to the view of the JobTrackers[1], and follow the real-time
advancement of the tracker once it’s been selected.
[1] [https://localhost:8443/webtools/control/FindJobTracker]
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