Custom interceptors and finding the first and last camel route

[BAnanth <bh...@wipro.com>]

Hello,

We have a requirement wherein we need to do some database operations
(inserts/updates) immedialtely after the first and last routes are executed.

We would be writing two custom interceptors - one for the insert operation
after the first route is executed , and the other for the update operation
once the last route is executed.

We wanted to know if there is a way/method to know when the first route in
camel has been executed. Likewise is there a way to find out the last route
executed and then trigger the interceptor for updating the data in the
database.

As always, appreciate your help.

Thanks and Regards,
Bhavani



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Re: Custom interceptors and finding the first and last camel route

[BAnanth <bh...@wipro.com>]

Thanks everyone for your reply.

I meant the first and last route within a given context.

eg

<context>

<r1>
     from and to stmts
<r2>
     from ...to
<r3>
     from...to
</context>

We need to make an entry to the databas immediately after the first route
(r1) "from-to" is executed in the first route. this is needed to persisit
the original message and other details. (we are using tracer for this)


The second requirement is  to make an entry immeditely after the last route
is executed (last from-to).
We were planning to use OnCompleteion here. But the solution has to be
generic , in the sense it should be able to trigger onCompletion
irrespective of whether the user specifies onCompletion in his code. (the
user could  give the route id in a properties file and our program should be
able to implement the onCOmpletion if the given route matches the route id
in the properties file.)



Thanks and Regards,
bhavani





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Re: Custom interceptors and finding the first and last camel route

[Claus Ibsen <cl...@gmail.com>]

On Thu, Jan 24, 2013 at 12:10 PM, BAnanth <bh...@wipro.com> wrote:
> Hello,
>
> We have a requirement wherein we need to do some database operations
> (inserts/updates) immedialtely after the first and last routes are executed.
>
> We would be writing two custom interceptors - one for the insert operation
> after the first route is executed , and the other for the update operation
> once the last route is executed.
>

What is the first route and the last route? Do you mean the 1st route
a given Exchange starts with,
and the last route the same Exchange ended at?

> We wanted to know if there is a way/method to know when the first route in
> camel has been executed. Likewise is there a way to find out the last route
> executed and then trigger the interceptor for updating the data in the
> database.
>

There is also the tracer
http://camel.apache.org/tracer

And the event notifier api. We dont have to much docs about this but a
little bit here
http://camel.apache.org/eventnotifier-to-log-details-about-all-sent-exchanges.html





> As always, appreciate your help.
>
> Thanks and Regards,
> Bhavani
>
>
>
> --
> View this message in context: http://camel.465427.n5.nabble.com/Custom-interceptors-and-finding-the-first-and-last-camel-route-tp5726148.html
> Sent from the Camel - Users mailing list archive at Nabble.com.



-- 
Claus Ibsen
-----------------
Red Hat, Inc.
FuseSource is now part of Red Hat
Email: cibsen@redhat.com
Web: http://fusesource.com
Twitter: davsclaus
Blog: http://davsclaus.com
Author of Camel in Action: http://www.manning.com/ibsen

Re: Custom interceptors and finding the first and last camel route

[Christian Müller <ch...@gmail.com>]

Please find my comments inline.

Best,
Christian

On Thu, Jan 24, 2013 at 12:10 PM, BAnanth <bh...@wipro.com> wrote:

> Hello,
>
> We have a requirement wherein we need to do some database operations
> (inserts/updates) immedialtely after the first and last routes are
> executed.
>

What do you mean?
After each exchanges was processed by the first endpoint on a route and
after each exchange was processed by the last endpoint on a route?
Or only for the first exchange?
Or...?


> We would be writing two custom interceptors - one for the insert operation
> after the first route is executed , and the other for the update operation
> once the last route is executed.
>
In org.apache.camel.processor.interceptor.DefaultTraceEventMessage you can
check how to figure out what is/was the fromEndpoint, previousNode and
nextNode. I think with this information you can determine in your
interceptor whether it should do something or not.

>
> We wanted to know if there is a way/method to know when the first route in
> camel has been executed. Likewise is there a way to find out the last route
> executed and then trigger the interceptor for updating the data in the
> database.
>
See above. May the nextNode is null if you passed the last endpoint. And
fromEndpoint and previousNode may have the same values when you pased the
first endpoint.

>
> As always, appreciate your help.
>
> Thanks and Regards,
> Bhavani
>
>
>
> --
> View this message in context:
> http://camel.465427.n5.nabble.com/Custom-interceptors-and-finding-the-first-and-last-camel-route-tp5726148.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>



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Re: Custom interceptors and finding the first and last camel route

[lleclerc <ll...@aim-rg.com>]

I don`t understand what you are asking.

Usually you can just add a ".to(somethingElse)" at the end of your route. Or
you can add some http://camel.apache.org/predicate.html to check if your
request was succesful first.

If your 2 routes should be in sync, why aren`t they on the same route ?
Else you might try to use http://camel.apache.org/aggregator2.html and you
will need to make sure it`s 2 matching messages and maybe skip some if only
1 of your 2 routes success.



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