[jira] [Comment Edited] (FLINK-9431) Introduce TimeEnd State to flink cep

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

    [ https://issues.apache.org/jira/browse/FLINK-9431?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16488734#comment-16488734 ] 

aitozi edited comment on FLINK-9431 at 5/24/18 9:56 AM:
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[~dawidwys] Three thing:

# 1. if i use {code:java}Pattern.begin('A').notfollowedBy("B").within(Time.minutes(5)){code}, Pattern cant be end with notFollowedBy
# 2. within just compare the time with the start state, not with the any middle pattern you refer to. May be you want express the {code:java}A followedBy B notFollowedBy C and emit (A, B) when 5 minutes past{code}
# 3. it is not directly, i have to get matched results from timeout results
I think timeEnd state only need to work with notFollowedBy pattern because it has a explict path to Final state, and  timeEnd state can reach Final when time past.



was (Author: aitozi):
[~dawidwys]two thing:

# 1. if i use {code:java}Pattern.begin('A').notfollowedBy("B").within(Time.minutes(5)){code}, Pattern cant be end with notFollowedBy
# 2. within just compare the time with the start state, not with the any middle pattern you refer to. May be you want express the {code:java}A followedBy B notFollowedBy C and emit (A, B) when 5 minutes past{code}
# 3. it is not directly, i have to get matched results from timeout results
I think timeEnd state only need to work with notFollowedBy pattern because it has a explict path to Final state, and  timeEnd state can reach Final when time past.


> Introduce TimeEnd State to flink cep
> ------------------------------------
>
>                 Key: FLINK-9431
>                 URL: https://issues.apache.org/jira/browse/FLINK-9431
>             Project: Flink
>          Issue Type: Improvement
>          Components: CEP
>    Affects Versions: 1.4.2
>            Reporter: aitozi
>            Assignee: aitozi
>            Priority: Major
>
> Now flink cep have no support to reach a Final State upon past some time. if i use a pattern like 
> {code:java}Pattern.begin('A').notFollowedBy("B"){code}, if i want A element be emitted after 5minutes, i have no way.
> I want to introduce a timeEnd State to work with notFollowedBy to figure out with this scenior.
> It can be used like this {code:java}Pattern.begin('A').notFollowedBy("B").timeEnd("end").{code},
> [~dawidwys] [~kkl0u] Is this meaningful?



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