[
https://issues.apache.org/jira/browse/FLINK-5982?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Wei-Che Wei updated FLINK-5982:
-------------------------------
Description:
Currently, running a invokable in {{Task}} needs to call
{{setEnvironment(env)}} and {{invoke()}}. If the invokable is also a
{{StatefulTask}}, it need to call {{setInitialState(state)}}. That makes the
difficulty in doing the eager initialization on invokable during {{DEPLOYING}}
state. One solution discussed in FLINK-4714 is to separate {{invoke()}} into
{{open()}} and {{invoke()}}, but that makes the complexity for running it in
{{Task}}.
This task wants to refactor {{AbstractInvokable}} and {{StatefulTask}} to make
it easier to construct and run an invokable.
# Refactor abstract class to have one default constructor.
#* Remove {{setEnvironment(env)}} and change {{AbstractInvokable}} to have one
argument constructor with {{Environment}}.
#* Remove {{setInitialState}} and create a new abstract class
{{AbstractStatefulInvokable}} to inherit {{AbstractInvokable}} and implement
{{StatefulTask}}. Make {{AbstractStatefulInvokable}} have a two argument
constructor with {{Environment}} and {{TaskStateHandles}}.
# Update all subclass
#* Make all subclass of only {{AbstractInvokable}} have an one argument
constructor and call the constructor in {{AbstractInvokable}}.
#* Make all subclass of {{AbstractInvokable}} and {{StatefulTask}} to inherit
{{AbstractStatefulInvokable}} and have two two argument constructor.
# Change the creation of the invokables to call that constructor, update all
the tests.
Then, we can simplify the logic to run an invokable by using constructor and
{{invoke()}}. The eager initialization can easily be placed in the constructor
to fulfill the requirement such as FLINK-4714.
was:
Currently, running a invokable in {{Task}} needs to call
{{setEnvironment(env)}} and {{invoke()}}. If the invokable is also a
{{StatefulTask}}, it need to call {{setInitialState(state)}}. That makes the
difficulty in doing the eager initialization on invokable during {{DEPLOYING}}
state. One solution discussed in FLINK-4714 is to separate {{invoke()}} into
{{open()}} and {{invoke()}}, but that makes the complexity for running it in
{{Task}}.
This task wants to refactor {{AbstractInvokable}} and {{StatefulTask}} to make
it easier to construct and run an invokable.
# Refactor abstract class to have one default constructor.
#* Remove {{setEnvironment(env)}} and change {{AbstractInvokable}} to have one
argument constructor with {{Environment}}.
#* Remove {{setInitialState}} and create a new abstract class
{{AbstractStatefulInvokable}} to inherit {{AbstractInvokable}} and implement
{{StatefulTask}}. Make {{AbstractStatefulInvokable}} have a two argument
constructor with {{Environment}} and {{TaskStateHandles}}.
# Update all subclass
#* Make all subclass of only {{AbstractInvokable}} have an one argument
constructor and call the constructor in {{AbstractInvokable}}.
#* Make all subclass of {{AbstractInvokable}} and {{StatefulTask}} to inherit
{{AbstractStatefulInvokable}} and have two two argument constructor.
# Change the creation of the invokables to call that constructor, update all
the tests
> Refactor AbstractInvokable and StatefulTask
> -------------------------------------------
>
> Key: FLINK-5982
> URL: https://issues.apache.org/jira/browse/FLINK-5982
> Project: Flink
> Issue Type: Improvement
> Components: Distributed Coordination, State Backends, Checkpointing
> Affects Versions: 1.2.0
> Reporter: Wei-Che Wei
> Assignee: Wei-Che Wei
>
> Currently, running a invokable in {{Task}} needs to call
> {{setEnvironment(env)}} and {{invoke()}}. If the invokable is also a
> {{StatefulTask}}, it need to call {{setInitialState(state)}}. That makes the
> difficulty in doing the eager initialization on invokable during
> {{DEPLOYING}} state. One solution discussed in FLINK-4714 is to separate
> {{invoke()}} into {{open()}} and {{invoke()}}, but that makes the complexity
> for running it in {{Task}}.
> This task wants to refactor {{AbstractInvokable}} and {{StatefulTask}} to
> make it easier to construct and run an invokable.
> # Refactor abstract class to have one default constructor.
> #* Remove {{setEnvironment(env)}} and change {{AbstractInvokable}} to have
> one argument constructor with {{Environment}}.
> #* Remove {{setInitialState}} and create a new abstract class
> {{AbstractStatefulInvokable}} to inherit {{AbstractInvokable}} and implement
> {{StatefulTask}}. Make {{AbstractStatefulInvokable}} have a two argument
> constructor with {{Environment}} and {{TaskStateHandles}}.
> # Update all subclass
> #* Make all subclass of only {{AbstractInvokable}} have an one argument
> constructor and call the constructor in {{AbstractInvokable}}.
> #* Make all subclass of {{AbstractInvokable}} and {{StatefulTask}} to inherit
> {{AbstractStatefulInvokable}} and have two two argument constructor.
> # Change the creation of the invokables to call that constructor, update all
> the tests.
> Then, we can simplify the logic to run an invokable by using constructor and
> {{invoke()}}. The eager initialization can easily be placed in the
> constructor to fulfill the requirement such as FLINK-4714.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
