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Posted to user@flink.apache.org by Szymon <si...@poczta.fm> on 2018/10/13 07:49:49 UTC
Mapstatedescriptor
Hi, i have a question about MapStateDescriptor used to create MapState. I have a keyed stream and ProcessWindowFunction where I want to use MapState. And the question is that in MapStateDescriptor constructor public MapStateDescriptor(String name,
Class<UK> keyClass,
Class<UV> valueClass)the "name" must be unique for each key or this is only the name/description.Best RegardsSzymon
Re: Mapstatedescriptor
Posted by Kostas Kloudas <k....@data-artisans.com>.
Hi Szymon,
Dominik is right. The “name” refers to the whole state described by the specified descriptor.
Kostas
> On Oct 13, 2018, at 10:30 AM, Dominik Wosiński <wo...@gmail.com> wrote:
>
> Hey,
> It's the name for the whole descriptor. Not the keys, it means that no other descriptor should be created with the same name.
>
> Best Regards,
> Dom.
>
> Sob., 13.10.2018, 09:50 użytkownik Szymon <simon_t@poczta.fm <ma...@poczta.fm>> napisał:
>
>
> Hi, i have a question about MapStateDescriptor used to create MapState.
> I have a keyed stream and ProcessWindowFunction where I want to use MapState. And the question is that in MapStateDescriptor constructor
>
> public MapStateDescriptor(String name, Class<UK> keyClass, Class<UV> valueClass)
>
> the "name" must be unique for each key or this is only the name/description.
>
> Best Regards
> Szymon
>
>
>
>
>
Re: Mapstatedescriptor
Posted by Dominik Wosiński <wo...@gmail.com>.
Hey,
It's the name for the whole descriptor. Not the keys, it means that no
other descriptor should be created with the same name.
Best Regards,
Dom.
Sob., 13.10.2018, 09:50 użytkownik Szymon <si...@poczta.fm> napisał:
>
>
> Hi, i have a question about MapStateDescriptor used to create MapState.
> I have a keyed stream and ProcessWindowFunction where I want to use
> MapState. And the question is that in MapStateDescriptor constructor
>
> public MapStateDescriptor(String name, Class<UK> keyClass, Class<UV>
> valueClass)
>
> the "name" must be unique for each key or this is only the
> name/description.
>
> Best Regards
> Szymon
>
>
>
>
>