[jira] [Commented] (BEAM-2980) BagState.isEmpty needs a tighter spec

["Beam JIRA Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17189441#comment-17189441 ] 

Beam JIRA Bot commented on BEAM-2980:
-------------------------------------

This issue was marked "stale-P2" and has not received a public comment in 14 days. It is now automatically moved to P3. If you are still affected by it, you can comment and move it back to P2.

> BagState.isEmpty needs a tighter spec
> -------------------------------------
>
>                 Key: BEAM-2980
>                 URL: https://issues.apache.org/jira/browse/BEAM-2980
>             Project: Beam
>          Issue Type: Bug
>          Components: beam-model
>            Reporter: Kenneth Knowles
>            Priority: P3
>
> Consider the following:
> {code}
> BagState<X> myBag = // empty
> ReadableState<Boolean> isMyBagEmpty = myBag.isEmpty();
> myBag.add(bizzle);
> bool empty = isMyBagEmpty.read();
> {code}
> Should {{empty}} be true or false? We need a consistent answer, across all kinds of state, when snapshots are required.



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