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https://issues.apache.org/jira/browse/FLINK-5024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15652901#comment-15652901
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Xiaogang Shi commented on FLINK-5024:
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I am very poor at English :( But i think "Simple" is more often used as the
opposite of "Compound". For example: simple interests and compound interests.
"Primitive" is not that good because it is usually used to describe those BASIC
elements which form the other things.
Maybe we need some help from native speakers.... lol
> Add SimpleStateDescriptor to clarify the concepts
> -------------------------------------------------
>
> Key: FLINK-5024
> URL: https://issues.apache.org/jira/browse/FLINK-5024
> Project: Flink
> Issue Type: Improvement
> Reporter: Xiaogang Shi
> Assignee: Xiaogang Shi
>
> Currently, StateDescriptors accept two type arguments : the first one is the
> type of the created state and the second one is the type of the values in the
> states.
> The concepts however is a little confusing here because in ListStates, the
> arguments passed to the StateDescriptors are the types of the list elements
> instead of the lists. It also makes the implementation of MapStates difficult.
> I suggest not to put the type serializer in StateDescriptors, making
> StateDescriptors independent of the data structures of the values.
> A new type of StateDescriptor named SimpleStateDescriptor can be provided to
> abstract those states (namely ValueState, ReducingState and FoldingState)
> whose states are not composited.
> The states (e.g. ListStates and MapStates) can implement their own
> descriptors according to their data structures.
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