David Griffon created UNOMI-739:
-----------------------------------
Summary: Implemenation of purge of sessions / events following
rollover usage.
Key: UNOMI-739
URL: https://issues.apache.org/jira/browse/UNOMI-739
Project: Apache Unomi
Issue Type: New Feature
Reporter: David Griffon
Currently the configuration is set by:
{code}
# Purge all monthly indexes (sessions/events) that have been created for a
specific number of months
org.apache.unomi.monthly.index.purge.existTime=${env:UNOMI_MONTHLY_INDEX_PURGE_EXISTTIME:-12}
{code}
it has to be changed to allow a purge by type: session and event
{code}
org.apache.unomi.sessions.purge.existTime=${env:UNOMI_SESSIONS_PURGE_EXISTTIME:-}
org.apache.unomi.events.purge.existTime=${env:UNOMI_EVENTS_PURGE_EXISTTIME:-}
{code}
Old value should be deprecated and use as default if the new one are not set.
h2. Implementation
2 mechanisms are involved in the purge of sessions / events:
h3. Deleting old documents:
There is a job that currently purge monthly indices and profiles, the goal is
to replace the [monthly indices
purge|https://github.com/apache/unomi/blob/7feff5c5067ff679a079211d9f2eb989898efc75/services/src/main/java/org/apache/unomi/services/impl/profiles/ProfileServiceImpl.java#L402]
by a dedicated method to remove events and sessions.
This method will work as the [profile
purge|https://github.com/apache/unomi/blob/7feff5c5067ff679a079211d9f2eb989898efc75/services/src/main/java/org/apache/unomi/services/impl/profiles/ProfileServiceImpl.java#L333]
calling {{persistenceService.removeByQuery(..)}}.
Like in here:
https://github.com/apache/unomi/blob/7feff5c5067ff679a079211d9f2eb989898efc75/services/src/main/java/org/apache/unomi/services/impl/profiles/ProfileServiceImpl.java#L365
*A log need to be added to mention the number of document removed.*
h3. Removing empty indices.
When documents are deleted, it will happen that some indices contain no
document, we need to have a dedicated execution to remove the empty indices.
*A log need to be added to mention the deleted indices and the remaining
indices with the number of documents in each.*
h2. Handle TODOs
- Remove index deletion from the rollup configuration.
- Enable back and adapt integration test related to the purge.
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