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https://issues.apache.org/jira/browse/GEODE-3676?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lynn Gallinat updated GEODE-3676:
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Summary: Add WriteInterceptor user callback to modify a value before being
put into the cache (was: Add WriteInterceptor to modify a value before being
put into the cache)
> Add WriteInterceptor user callback to modify a value before being put into
> the cache
> ------------------------------------------------------------------------------------
>
> Key: GEODE-3676
> URL: https://issues.apache.org/jira/browse/GEODE-3676
> Project: Geode
> Issue Type: New Feature
> Components: regions
> Reporter: Fred Krone
> Assignee: Lynn Gallinat
>
> Create a new callback called WriteInterceptor to allow a user to change the
> value to be written during a write operation.
> Use cases:
> # Needing to update an entry when doing write behind caching. For example --
> inserting into a DB and needed to add the auto generated id to the domain
> object entry.
> # Needing to update an entry when doing inline-caching. Example: needing to
> update a PdxInstance on-the-fly.
> Requirements:
> # This callback should not be invoked while holding locks on the RegionEntry.
> # Each Region will only support one instance of WriteInterceptor.
> # Callback should be invoked:
> #* before CacheWriter
> #* before value constraint checks
> #* before null checks on a put
> #* after CacheLoader
> # The WriteInterceptor must be mutable at runtime so that a user can change
> the WriteInterceptor on an existing region.
> # The WriteInterceptor can be installed or changed via APIs and gfsh commands.
> # The WriteInterceptor should be invoked only in the member that initiated
> the write operation and should not be invoked at subsequent distribution
> points.
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