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https://issues.apache.org/jira/browse/IGNITE-425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16109112#comment-16109112
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ASF GitHub Bot commented on IGNITE-425:
---------------------------------------
GitHub user nizhikov opened a pull request:
https://github.com/apache/ignite/pull/2372
IGNITE-425: Implementation of ContinuousQueryWithTransformer
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/nizhikov/ignite IGNITE-425
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/ignite/pull/2372.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2372
----
commit a188dfa481796fe554085a9c729e327740d6242e
Author: Nikolay Izhikov <[email protected]>
Date: 2017-08-01T15:37:49Z
IGNITE-425: Implementation of ContinuousQueryWithTransformer
----
> Introduce transformers for continuous queries
> ---------------------------------------------
>
> Key: IGNITE-425
> URL: https://issues.apache.org/jira/browse/IGNITE-425
> Project: Ignite
> Issue Type: Sub-task
> Components: cache
> Reporter: Yakov Zhdanov
> Assignee: Nikolay Izhikov
>
> Currently if updated entry passes the filter, it is sent to node initiated
> the query entirely. It would be good to provide user with the ability to
> transform entry and, for example, select only fields that are important. This
> may bring huge economy to traffic and lower GC pressure as well.
> Possible signatures will be:
> {noformat}
> public final class ContinuousQuery<K, V, T> {..} // T is a type transformer
> transforms to
> public ContinuousQuery<K, V, T> setLocalListener(Listener<T> locLsnr) {..} //
> Probably, we will have to introduce new listener type, since user may want to
> wipe out key as well.
> /* new method to add */
> public ContinuousQuery<K, V, T> setRemoteTransformerFactory(Factory<? extends
> ContinuousQueryTransformer<K, V, T>> factory) { ..}
> {noformat}
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