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https://issues.apache.org/jira/browse/BEAM-1195?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15863188#comment-15863188
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Kenneth Knowles commented on BEAM-1195:
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Instead, they will be directly represented in a proto schema.
> Give triggers URNs / JSON formats
> ---------------------------------
>
> Key: BEAM-1195
> URL: https://issues.apache.org/jira/browse/BEAM-1195
> Project: Beam
> Issue Type: New Feature
> Components: beam-model-runner-api
> Reporter: Kenneth Knowles
> Assignee: Kenneth Knowles
>
> We have recently gotten to the point where triggers are just syntax, but it
> is still shipped via Java serialization. To make it language-independent, we
> need a concrete syntax.
> Something like the following is fairly concise, tag adjacent to payload. I
> haven't bothered making up fully verbose/namespaced URNs here.
> {code}
> {
> "$urn": "OrFinally",
> "main": {
> "$urn": "EndOfWindow",
> "early": <foo>
> },
> "finally": {
> "$urn": "AfterCount",
> "count": 45
> }
> }
> {code}
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