I've created the following JIRA issue for ServiceMix NMR.
Do you think it's worth doing it ?  Would it help people finding
problems ?  I usually use the log file, but having something more
dynamic may be helpful.

On Tue, Mar 11, 2008 at 10:36 AM, Guillaume Nodet (JIRA)
<[EMAIL PROTECTED]> wrote:
> Debugging flows
>  ---------------
>
>                  Key: SMX4NMR-21
>                  URL: https://issues.apache.org/activemq/browse/SMX4NMR-21
>              Project: ServiceMix NMR
>           Issue Type: New Feature
>             Reporter: Guillaume Nodet
>
>
>  Create a set of console commands / OSGi service / NMR listeners to be able 
> to:
>   * add / remove / disable breakpoints (with conditional evaluation on 
> exchanges)
>   * list paused exchanges
>   * inspect / modify a paused exchange
>   * resume execution for a exchange
>
>  A breakpoint is basically a condition that filters an exchange.  If the 
> filter match, the breakpoint is activated and the flow for the given exchange 
> is paused.   Simple breakpoints include:
>    * exchanges originated from a given endpoint
>    * exchanges targeted at a given endpoint
>    * exchanges in an ERROR status
>    * ...
>
>  Using an ExchangeListener, it should be easy to intercept all the exchanges. 
>  I think the problem is that currently, the only way is to suspend the 
> calling thread and wait for a signal that would be set by a command when 
> resuming an exchange.  This is not really scalable.   Maybe using a flow is a 
> better option, but I think it would be more intrusive, so that entering / 
> exiting debug mode may not be easy.
>
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-- 
Cheers,
Guillaume Nodet
------------------------
Blog: http://gnodet.blogspot.com/

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