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Posted to dev@tinkerpop.apache.org by "Boxuan Li (Jira)" <ji...@apache.org> on 2022/06/11 03:19:00 UTC

[jira] [Commented] (TINKERPOP-2523) Allow registration of listeners for traversal iteration begin/end events

    [ https://issues.apache.org/jira/browse/TINKERPOP-2523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17553017#comment-17553017 ] 

Boxuan Li commented on TINKERPOP-2523:
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This sounds very useful!

> Allow registration of listeners for traversal iteration begin/end events
> ------------------------------------------------------------------------
>
>                 Key: TINKERPOP-2523
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-2523
>             Project: TinkerPop
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.4.10
>            Reporter: Clément de Groc
>            Priority: Minor
>
> In order to improve observability/monitoring (e.g. distributed tracing, logging of traversals requests), it would be nice if users could register custom listeners for traversal iteration begin/end events.
> Those begin/end events are actually already nicely exposed as protected methods in [TraversalOpProcessor|https://github.com/apache/tinkerpop/blob/master/gremlin-server/src/main/java/org/apache/tinkerpop/gremlin/server/op/traversal/TraversalOpProcessor.java#L262-L272]. Though, in 3.4.10, it is difficult to subclass TraversalOpProcessor to override those methods as the [OpLoader|https://github.com/apache/tinkerpop/blob/master/gremlin-server/src/main/java/org/apache/tinkerpop/gremlin/server/op/OpLoader.java#L47] ensures only one OpProcessor can be loaded with name "traversal".
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