Re: xpath filter question

[John Dubchak]

Hi Reji,

Thanks for the response.  I added an .otherwise().log("xpath predicate 
failed...") and found out that I was running into an issue with 
namespaces.  Once I addressed the namespace issue, I was able to send a 
notification and have it work through the route correctly.

Here is what I ended up with:

DataFormat jaxb = new 
JaxbDataFormat("com.example.services.schemas.notification");
Namespaces ns = new Namespaces("tns", 
"http://www.example.com/services/notifications";);

from("activemq:cdw.Notifications")
    .log("Recieved notification ${id}: ")
  .choice()
        .when(ns.xpath("/tns:notification/tns:type = 'email'"))
        .process(new Processor() {
            @Override
            public void process(Exchange exchange) throws Exception {
                String body = exchange.getIn().getBody(String.class);
                exchange.getOut().setBody(body);
            }
        })
            .unmarshal(jaxb).bean(notifier, "send")
        .otherwise().log("No match for message: ${id}").stop();

I'm not entirely positive that I require the processor before 
unmarshaling, however it works and I may end up removing that and 
testing it again.  But, it was a namespace issue in the XML and xpath 
wasn't matching as a result.

John

On 11/14/13 7:04 PM, Reji Mathews wrote:
John

What is the error?  Anything in log?  And to which component are u sending the 
message after removing the processor

Reji

ravindra.godb...@cognizant.com wrote:

Can you share the sample xml message ? Does it have namespace in it ?
________________________________________
From: John Dubchak [j...@johndubchak.com]
Sent: Friday, November 15, 2013 1:42 AM
To: users@camel.apache.org
Subject: xpath filter question

Hi,

I am trying to create a JavaDSL route that filters an incoming XML from
an ActiveMQ queue.  The message is being delivered correctly and I can
print it out if I short-circuit it with a processor that dumps the
message.  However, removing the processor, I cannot seem to get the
correct xpath expression to match on a particular value:

from("activemq:cdw.Notifications")
   .filter()
.xpath("/parent_node[child_node = 'value of text']")

Any insight into what I've messed up?

Thanks,
John





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