Carsten Ziegeler created SLING-2831:
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Summary: Use new discovery API
Key: SLING-2831
URL: https://issues.apache.org/jira/browse/SLING-2831
Project: Sling
Issue Type: Improvement
Components: Extensions
Affects Versions: Extensions Event 3.1.4
Reporter: Carsten Ziegeler
Assignee: Carsten Ziegeler
Fix For: Extensions Event 3.1.6
We should leverage the new discovery api in several ways:
With SLING-2829 we have an API which allows to detect the capabilities of an
instance (= the jobs the instance can process). The discovery API provides a
way to distribute this information across the cluster. The job handling should
use this information to distribute the jobs to instances which are capable of
handling the jobs.
I refer to this as the push based job distributed: once a job is created, the
receiving instance can use the capabilities and push the job to an instance
which is able to process this. This allows job processing without any
additional overhead like locking etc.
With the new topology view of the discovery api, we can handle crashing/stopped
instances, changes in capabilities etc. As these events usually require
redistribution, we can use the leader election of the topology view to let only
one instance do the task
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