On Fri, Feb 27, 2009 at 5:22 PM, ee7arh <[email protected]> wrote:
>
> Hi,
>
> I'm getting quite into using the Camel DSL router and got quite far but now
> have this situation:
Welcome onboard the ride.
>
> I have a bean method (myBeanMethod1()) which returns not a boolean but a
> real object (MyReturnObj1). This object contains an Enum return code
> (myReturnCode) and I want to do some routing based on this returncode.
>
> e.g.
>
> // Bean Method
> public MyReturnObj1 myBeanMethod1();
>
> The definition of MyReturnObj1 is
>
> public class MyReturnObj1 {
>
> protected Enum myReturnCode;
>
> }
>
> I want to do some routing like this:
>
> from("jms:queue:queue1").to("bean:myBeanMethod1").choice()
> .when(myErrorCode=myReturnCode.ERRROR1).to("jms:queue:error1Queue")
> .when(myErrorCode=myReturnCode.ERROR2).to("jms:queue:error2Queue")
> .otherwise().to("jms:queue:unknownErrorQueue");
>
> Is it possible to somehow do routing based on bean which returns an object?
> If I set my "returnCode" into the JMS Header field I could use the header()
> method to get the values as seen in many examples on Camel website.
Yes when you do routing with the content based router EIP pattern, you
use the choice/when/otherwise as you do above.
when and otherwise uses Predicate to evaluate true|false, if it should
route it this way or continue down the other predicates.
Camel have build in nice DSL sugar for these predicates, aka predicate
builders and others so you can build fluent syntax.
You can use a method call predicate to invoke a method on a bean, and
then chain the sub predicate isEqualTo.
when(method(MyPredicateBean.class,
"thismethod").isEqualTo(MyEnumConstant)).to("jms:xxx")
But this will invoke your bean on each predicate test and if you think
this operation is very expensive, then you can do as above
to route it to your bean prior the choice and set the result in a header.
Then the testing is just based using header("key") instead of the
method call predicate.
>
> Advice greatly appreciated.
>
> Andrew
>
> --
> View this message in context:
> http://www.nabble.com/Camel-Routing-based-on-bean-return-object-tp22249110p22249110.html
> Sent from the Camel - Users (activemq) mailing list archive at Nabble.com.
>
>
--
Claus Ibsen
Apache Camel Committer
Open Source Integration: http://fusesource.com
Blog: http://davsclaus.blogspot.com/
