Koji Kawamura created NIFI-4049:
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Summary: Refactor AtomicDistributedMapCacheClient to be used with
cache engines that does not have revision number
Key: NIFI-4049
URL: https://issues.apache.org/jira/browse/NIFI-4049
Project: Apache NiFi
Issue Type: Improvement
Components: Extensions
Affects Versions: 1.2.0
Reporter: Koji Kawamura
Assignee: Koji Kawamura
AtomicDistributedMapCacheClient interface defines fetch and replace method to
atomically replace cache value. To do so, it currently uses a long revision
value. This can be a limitation when other implementation is written against a
cache engine that doesn't have revision concept.
This JIRA proposes to refactor that interface by using generics to specify what
type of revision is used by an implementation class.
If the underlying cache engine doesn't have revision concept, the revision
field can be used to store current cached value, and to check if the key is not
updated at 'replace' method.
https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-standard-services/nifi-distributed-cache-client-service-api/src/main/java/org/apache/nifi/distributed/cache/client/AtomicDistributedMapCacheClient.java
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