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From Hadrian Zbarcea <>
Subject Re: Camel direct component
Date Tue, 05 Feb 2013 21:56:55 GMT
Hi Jothi,

A direct: endpoint provides a synchronous, in memory call which is 
probably the simplest, most basic way in which two endpoints could 
communicate. In real life endpoints almost never share the memory space, 
right? So the answer to your question revolves around those usecases 
where the two endpoints share the memory space.

One is, like you mentioned, kinda artificially splitting a route in two 
and use a direct endpoint to connect them, sorta like using 
continuations. It allows for separation of routes into parts that have 
different roles and make them easier to manage.

There is a second probably even more interesting set of usecases, mostly 
useful during development/testing in different test environments, where 
you would use a direct endpoint (and a route) to mock an external 
service not available in that particular environment. Mocking it out, 
allows you to continue your integration work with minimal impact. Things 
are even easier if you externalize your uris using things like the 
properties component, because then the only thing that changes is a 
string in a text file.

And there are obviously others, unit testing was mentioned.

I hope this helps,

On 02/04/2013 04:42 PM, Joe San wrote:
> Camel users,
> I came across the direct component. As I understand that this component is
> used to tie routes together in the same camel context, I'm not able to
> think of any practical use cases. Could anyone please let me know of a
> practical example where the direct component would be a good fit?
> Regards,
> Jothi

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