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From Anton Vinogradov ...@apache.org>
Subject Re: Continuous Query With Transformer are ready for merge
Date Thu, 08 Feb 2018 09:38:06 GMT
Looks like no one have objections.

Nikolay,
Let's merge.

On Tue, Feb 6, 2018 at 8:45 PM, Nikolay Izhikov <nizhikov@apache.org> wrote:

> Hello, Igniters.
>
> Improvement of Continuous Query public API are ready for merge.
> AFAIK Anton Vinogradov and Yakov Zhdanov are happy with proposed API. [1]
>
> With this improvement we can transform entry on the server node before
> sending it to the listener to reduce network utilization.
>
> Example of usage:
>
> ```
> ContinuousQueryWithTransformer<Long, Value, T> cqwt = new
> ContinuousQueryWithTransformer<>();
>
> cqwt.setRemoteTransformerFactory(FactoryBuilder.factoryOf(new
> IdTransformer()));
>
> CQWTListener lsnr = new CQWTListener();
>
> cqwt.setLocalListener(lsnr);
>
> cache.query(cqwt);
>
> public static class IdTransformer implements IgniteClosure<CacheEntryEvent<?
> extends Long, ? extends Value>, Long> {
>    @Override public Long apply(CacheEntryEvent<? extends Long, ? extends
> Value> event) {
>        return event.getValue().id;
>    }
> }
>
> public static class CQWTListener<Long> implements EventListener<Long> {
>    @Override public void onUpdated(Iterable<? extends Long> ids) {
>        for (Long id : ids)
>           consume(id);
>    }
> }
>
> ```
>
> Implementation checked on TC, benchmarks [2][3] passed as well and we’re
> ready to merge changes to the master branch.
>
> Any objections?
>
> [1] https://github.com/apache/ignite/pull/2372
> [2] https://github.com/nizhikov/ignite-425-benchmark
> [3] https://issues.apache.org/jira/browse/IGNITE-425?
> focusedCommentId=16353812&page=com.atlassian.jira.
> plugin.system.issuetabpanels:comment-tabpanel#comment-16353812

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