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From Claus Ibsen <>
Subject Re: wireTaps really asynchronous?
Date Thu, 18 Aug 2011 11:57:46 GMT
On Sun, Aug 14, 2011 at 9:18 AM, Claus Ibsen <> wrote:
> On Thu, Aug 11, 2011 at 5:18 PM, CamelBumper01 <> wrote:
>> Hi Claus,
>> Thanks for your response. I now understand why I was experiencing blocking.
>> However, I would like to advocate that the default threadpool for wireTaps
>> not use the  caller run rejection policy.  This default policy works well
>> for splits and other mechanisms, but I don't believe it is useful for
>> wireTaps as indicated by the situation I ran into.
>> I would like to suggest that the wireTap run policy use the DiscardPolicy by
>> default.  My rationale for this request is that a wireTap by definition
>> should be non-intrusive (if you are modelling it after a traditional
>> telephony wireTap paradigm).  Therefore, using the camel default caller run
>> rejection policy for wireTaps by it's nature implies an intrusive wireTap.
>> The DiscardPolicy would return the wireTap to a non-intrusive and truly
>> asynchronous metaphor.
> Some people uses the wireTap to spawn a new thread to route a copy of
> the message etc.
> Or a new message etc.
> So they most likely dont want to discard old messages etc.
> At first I would like to add some notes the the wire tap EIP about the
> current defaults.
> And how people can adjust this and chose their strategy. We may want
> to make configuring the rejectionPolicy a tad easier on the wireTap so
> you dont have to refer to a new thread pool or thread pool policy for
> that.

I have added a note to the Camel wiki page, that the wire tap uses the
default thread pool settings.
And that you must configure it explicit if you need to eg, discard old
messages etc, in case the pool is exhausted.

>> As always, someone who wants to override this new default behavior may
>> always do so.  Reasonable request?  Anyone else support or object?  How bout
>> Camel 2.9 :-)
>> Thanks,
>> Bret
>> --
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> --
> Claus Ibsen
> -----------------
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Claus Ibsen
Twitter: davsclaus, fusenews
Author of Camel in Action:

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