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2.x -- group by, custom map variant

See original GitHub issue

We are using release 2.1.7.

As is noted in the “What’s Different” page, the variant of groupBy that accepts a custom map factory is not currently part of the 2.x API. We were relying on this to implement “eviction” of groups that haven’t been seen for a “long time” (where “long” is user specified). Our system maintains Flowable instances for its entire lifetime (which is hopefully weeks/months), so it is important to be able to reclaim resources as we go.

Anyway – my questions are – are the plans to bring this back? Is there a suggested alternative for implementing the disposal of groups after a period of inactivity? Any guidance would be appreciated.

Issue Analytics

State:
Created 6 years ago
Reactions:1
Comments:14 (5 by maintainers)

Top GitHub Comments

1reaction

davidmotencommented, Dec 15, 2017

I was author of that contribution to 1.x #3931. Using timeout was discussed but it had problems. In particular you can lose emissions. If @akarnokd is in favour I can investigate adapting the groupBy operator to use a Map factory again.

0reactions

davidmotencommented, Apr 3, 2018

Woohoo! Slow compilation of RxJava 2.x is fixed in Eclipse 4.7.3.