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https://issues.apache.org/jira/browse/FLINK-5023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15649615#comment-15649615
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Xiaogang Shi edited comment on FLINK-5023 at 11/9/16 2:46 AM:
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@Aljoscha Krettek In that case, i think we should provide {{UpdatableState}}
instead of {{ReadableState}}.
Now {{State}} is updatable because it has the method {{clear()}}. I would
prefer {{ReadableState}} inherits from {{State}}; otherwise, it's very weird
that a readable state is not a state.
>From this point, i think the base {{State}} should be readable, and a new
>interface {{UpdatableState}} could be provided to abstract those states
>allowing both reads and writes.
was (Author: xiaogang.shi):
@Aljoscha Krettek In that case, i think we should provide {{UpdatableState}}
instead of {{ReadableState}}.
Now {{State}} is updatable because it has the method {{clear()}}. If
{{ReadableState}} does not inherit from {{State}}. I would prefer
{{ReadableState}} inherits from {{State}}; otherwise, it's very weird that a
readable state is not a state.
>From this point, i think the base {{State}} should be readable, and a new
>interface {{UpdatableState}} could be provided to abstract those states
>allowing both reads and writes.
> Add get() method in State interface
> -----------------------------------
>
> Key: FLINK-5023
> URL: https://issues.apache.org/jira/browse/FLINK-5023
> Project: Flink
> Issue Type: Improvement
> Components: State Backends, Checkpointing
> Reporter: Xiaogang Shi
> Assignee: Xiaogang Shi
>
> Currently, the only method provided by the State interface is `clear()`. I
> think we should provide another method called `get()` to return the
> structured value (e.g., value, list, or map) under the current key.
> In fact, the functionality of `get()` has already been implemented in all
> types of states: e.g., `value()` in ValueState and `get()` in ListState. The
> modification to the interface can better abstract these states.
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