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Posted to issues@camel.apache.org by "Balazs Szeti (JIRA)" <ji...@apache.org> on 2019/01/23 21:59:00 UTC

[jira] [Created] (CAMEL-13119) Create Cache Policy for routes

Balazs Szeti created CAMEL-13119:
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Summary: Create Cache Policy for routes
Key: CAMEL-13119
URL: https://issues.apache.org/jira/browse/CAMEL-13119
Project: Camel
Issue Type: New Feature
Components: camel-jcache
Reporter: Balazs Szeti

Let's write a Policy for camel routes that can cache the "result" of a route and execute the route next time only if nothing is found in the cache.
Related to cache DSL idea, but without DSL change: https://issues.apache.org/jira/browse/CAMEL-11114
In the first draft the CachePolicy would cache the Message Body by a key calculated via an Expression.
Interface:
* cachePolicy.setCacheManager( cacheManager ) - set the CacheManager. If not set, try lookup automatically.

* cachePolicy.setCacheName ( name ) - Will use this cache from the CacheManager. If not set, we can use the route id by default.
* cachePolicy.setKeyExpression( expression ) - Camel expression that is evaluated on the Exchange to determine the cache key. If it's found in the cache, the route is not executed and the cached value is set as Body. Otherwise the Message Body is added to the cache after the route with this key.

An earlier related implementation: [https://gist.github.com/bszeti/552bf7a1f05a75fc2964a4ce7ce889b5]
and how it can be used in a route: [https://gist.github.com/bszeti/4f855cd80cd69e3953ff990b0ae056a2]

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