[jira] [Updated] (FLINK-4992) Expose String parameter for timers in Timely functions and TimerService

["Aljoscha Krettek (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-4992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aljoscha Krettek updated FLINK-4992:
------------------------------------
    Component/s:     (was: Streaming)
                 DataStream API

> Expose String parameter for timers in Timely functions and TimerService
> -----------------------------------------------------------------------
>
>                 Key: FLINK-4992
>                 URL: https://issues.apache.org/jira/browse/FLINK-4992
>             Project: Flink
>          Issue Type: Improvement
>          Components: DataStream API
>    Affects Versions: 1.2.0
>            Reporter: Gyula Fora
>            Priority: Minor
>
> Currently it is very hard to register and execute multiple different types timers from the same user function because timers don't carry any metadata.
> We propose to extend the timer registration and onTimer logic by attaching a String argument so users of these features can implement functionality that depends on this addtitional metadata.
> The proposed new methods:
> In the TimerService:
> void registerProcessingTimeTimer(long time, String label);
> void registerEventTimeTimer(long time, String label);
> In the TimelyFunctions:
> void onTimer(long timestamp, String label, TimeDomain timeDomain, TimerService timerService...);
> This extended functionality can be mapped to a String namespace for the internal timer service. I suggest we don't use the term "namespace" here because it just complicates things for the users, I think "label" or "id" or "name" is much simpler to understand.



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