[jira] Commented: (CAMEL-2563) The Trace mechanism is inflexible and inefficient - specifically it doesn't enable custom tracing around a node.

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

    [ https://issues.apache.org/activemq/browse/CAMEL-2563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=58641#action_58641 ] 

Claus Ibsen commented on CAMEL-2563:
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> The Trace mechanism is inflexible and inefficient - specifically it doesn't enable custom tracing around a node.
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: CAMEL-2563
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-2563
>             Project: Apache Camel
>          Issue Type: Improvement
>          Components: camel-core
>    Affects Versions: 2.3.0
>         Environment: All.
>            Reporter: Jim Talbut
>            Priority: Minor
>             Fix For: Future
>
>         Attachments: tracechanges.diff, tracechanges.diff, tracechanges.diff, tracechanges.diff
>
>   Original Estimate: 2 days
>  Remaining Estimate: 2 days
>
> What it won't let me do:
> I want to be able to correlate the "out" trace with the "in" trace, in one database row without commiting the row until the route has completed.
> This requires a JPA transaction to exist around each of the nodes that are called.
> I'm finding that the transaction has ended by the time of the "out" trace.
> Inefficiencies:
> 1. It causes the construction of the new Exchange object and a bunch of String objects that I don't want.
> 2. It causes the invocation of a new route, that is unnecessary.
> I think it would be better to:
> 1. Pass the class to use as the TraceInterceptor into Tracer.
> 2. Break the existing TraceInterceptor into two, a base class that tracks the RouteNodes and a subclass that implements traceExchange.
> 3. Change traceExchange so that it returns an Object and pass that Object in to the call to traceExchange for "out" traces.
> 4. Give the Tracer a payload object that can be used to pass information to the TraceInterceptor.
> 5. Change the various trace* functions to take in and return a payload Object.
> Custom users could then dervice from TraceInterceptor and override the trace* functions as necessary (probably just traceExchange).
> I'm working on a patch.

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