Hi Claus, Tried two approach but neither of them worked for me (based out of the URL - http://camel.apache.org/exception-clause.html) What I need is when the first When fails, camel should continue to execute the second When. Could you let me know where I am going wrong?
Option 1: Defined the onException clause after the camel:xpath expression. Getting exception " OnException[[class org.apache.camel.builder.xml.InvalidXPathExpression] -> []] is not configured. " <camel:route> <camel:from ref="Sender"/> <camel:setHeader headerName="MyHeader"> <camel:constant>GOOD</camel:constant> </camel:setHeader> <camel:choice> <camel:when> <camel:xpath>//MessageId = 'a'</camel:xpath> <camel:onException> <camel:exception>org.apache.camel.builder.xml.InvalidXPathExpression</camel:exception> <camel:continued><camel:constant>true</camel:constant></camel:continued> </camel:onException> <camel:to ref="Receiver1_"/> </camel:when> <camel:when> <camel:simple>${header.MyHeader} == 'GOOD'</camel:simple> <camel:to ref="Receiver_"/> </camel:when> <camel:otherwise/> </camel:choice> </camel:route> Option 2: Define the onException clause inside the camel context. Here two it doesn't work. After exception occurs, the processing stops successfully. Instead I need the second condition to be evaluated. <camel:camelContext id="TryCatchEval"> <camel:onException> <camel:exception>org.apache.camel.builder.xml.InvalidXPathExpression</camel:exception> <camel:continued><camel:constant>true</camel:constant></camel:continued> </camel:onException> <camel:route> <camel:from ref="Sender"/> <camel:setHeader headerName="MyHeader"> <camel:constant>GOOD</camel:constant> </camel:setHeader> <camel:choice> <camel:when> <camel:xpath>//MessageId = 'a'</camel:xpath> <camel:to ref="Receiver1_"/> </camel:when> <camel:when> <camel:simple>${header.MyHeader} == 'GOOD'</camel:simple> <camel:to ref="Receiver_"/> </camel:when> <camel:otherwise/> </camel:choice> </camel:route> </camel:camelContext> Regards, Arpit -----Original Message----- From: Claus Ibsen [mailto:claus.ib...@gmail.com] Sent: Thursday, November 14, 2013 2:58 PM To: users@camel.apache.org Subject: Re: Try-Catch in choice-when Use <onException> instead of try .. catch as that is better. On Wed, Nov 13, 2013 at 2:15 PM, Goyal, Arpit <arpit.go...@sap.com> wrote: > Any idea how can I achieve the following? > > -----Original Message----- > From: Goyal, Arpit [mailto:arpit.go...@sap.com] > Sent: Wednesday, November 13, 2013 9:42 AM > To: users@camel.apache.org > Subject: Try-Catch in choice-when > > Hi All, > > I am trying to use Try-Catch inside 'when' but not sure how to get it right. > I am using BLUEPRINT DSL. Following is my route: > > <camel:route> > <camel:from ref="Sender"/> > > <camel:setHeader headerName="MyHeader"> > <camel:constant>GOOD</camel:constant> > </camel:setHeader> > > <camel:choice> > <camel:when> > <camel:doTry> > <camel:xpath>//MessageId = 'a'</camel:xpath> > <camel:to ref="Receiver1"/> > <camel:doCatch> > > <camel:exception>org.apache.camel.builder.xml.InvalidXPathExpression</camel:exception> > <camel:to > uri="log:TryCatchEval?level=INFO"/> > </camel:doCatch> > </camel:doTry> > </camel:when> > <camel:when> > <camel:simple>${header.MyHeader} == 'GOOD'</camel:simple> > <camel:to ref="Receiver_"/> > </camel:when> > <camel:otherwise/> > </camel:choice> > </camel:route> > > Here the prefix camel stands for > xmlns:camel=http://camel.apache.org/schema/blueprint > > Basically the idea which we want to achieve is, in case my first condition > fails (due to some exception), I want to execute the second condition and > have hard restriction that I can't change my pattern of choice-when. > > As per the camel-blueprint xsd > (http://camel.apache.org/schema/blueprint/camel-blueprint-2.11.2.xsd), > whenDefinition expects first element to be some language element and then > allows Try-Catch. What if the language it-self throws exception? How can I > prevent that? > > Regards, > Arpit. -- Claus Ibsen ----------------- Red Hat, Inc. Email: cib...@redhat.com Twitter: davsclaus Blog: http://davsclaus.com Author of Camel in Action: http://www.manning.com/ibsen