XPath Exception Using Camel 1.5.4 within Fuse ESB 3.4

[gmotts_gary.motts]

Hi,

I'm trying to use an Camel XPath fitler to read a message out of an ActiveMQ topic queue and place it into an ActiveMQ queue. I've validated the XPath using external tools, but I continue to receive XPath exceptions whenever the XML message is routed to my topic endpoint.

Here's the Camel expressions within MyRouteBuilder that I'm using:

public class MyRouteBuilder extends RouteBuilder {

public void configure() {

from("jbi:service:http://ventyx.com/core/myRouteBuilder")

.choice()

.when()

.xpath("//SOICanonicalHeader")

.to("activemq:topic:topic2")

.otherwise()

.to("activemq:queue:InvalidMessageQueue");

from("activemq:topic:topic2").filter().xpath("/InboundRequest/SOICanonicalHeader").

to("activemq:queue:example1");

}

Here's the Exception:

WARN - EndpointMessageListener - Endpoint[activemq:topic:topic2|http://fusesource.com/forums/] consumer caught an exception while processing JMS message: ActiveMQMessage {commandId = 5, responseRequired = true, messageId = ID:GMOTTS0705072-3676-1241626061718-2:48:1:1:1, originalDestination =

null, originalTransactionId = null, producerId = ID:GMOTTS0705072-3676-1241626061718-2:48:1:1, destination = topic://topic2, transactionId = null, expiration = 0, timestamp = 1241634317468, arrival = 0, brokerInTime = 1241634317468, brokerOutTime = 1241634317484, correlationId = null, replyTo = null, persistent = true, type = null, priority = 4, groupID = null, groupSequence = 0, targetConsumerId = null, compressed = false, userID = null, content = null, marshalledProperties = mailto:org.apache.activemq.util.ByteSequence@1e3885c, dataStructure = null, redeliveryCounter = 0, size = 0, properties = {org_apache_servicemix_file_name=work order2.xml, org_apache_servicemix_file_path=C:\ESB\iona\fuse-esb-3.4.0.1\temp\publisher2\work order2.xml}, readOnlyProperties = true, readOnlyBody = true, droppable = false}

org.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath: /InboundRequest/SOICanonicalHeader. Reason: javax.xml.xpath.XPathExpressionException at org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:443)

at org.apache.camel.builder.xml.XPathBuilder.matches(XPathBuilder.java:98)

at org.apache.camel.builder.xml.XPathBuilder.matches(XPathBuilder.java:63)

at org.apache.camel.processor.FilterProcessor.process(FilterProcessor.java:38)

at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:80)

at org.apache.camel.processor.DeadLetterChannel.process(DeadLetterChannel.java:185)

at org.apache.camel.processor.DeadLetterChannel.process(DeadLetterChannel.java:132)

at org.apache.camel.management.InstrumentationProcessor.process(InstrumentationProcessor.java:68)

at org.apache.camel.processor.UnitOfWorkProcessor.process(UnitOfWorkProcessor.java:52)

at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:41)

at org.apache.camel.processor.DelegateAsyncProcessor.process(DelegateAsyncProcessor.java:66)

at org.apache.camel.component.jms.EndpointMessageListener.onMessage(EndpointMessageListener.java:72)

at org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:543)

at org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:482)

at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:451)

at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)

at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)

at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:982)

at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:881)

at java.lang.Thread.run(Thread.java:619)

Caused by: javax.xml.xpath.XPathExpressionException

at com.sun.org.apache.xpath.internal.jaxp.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:193)

at org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:429)

... 19 more

Any help is appreciated,

Thanks,

Gary

Edited by: gmotts on May 6, 2009 3:06 PM

Edited by: gmotts on May 6, 2009 3:08 PM

[davsclaus]

Hi

Yeah Xpath can be troublesome to work with.

Its this route that causes an exception:

rom("activemq:topic:topic2").filter().xpath("/InboundRequest/SOICanonicalHeader").

to("activemq:queue:example1");

I guess its your xpath expression here that is invalid:

xpath("/InboundRequest/SOICanonicalHeader")

As its reported in the stacktrace:

rg.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath: /InboundRequest/SOICanonicalHeader. Reason: javax.xml.xpath.XPathExpressionException

at org.apache.camel.builder.xml.XPathBuilder.evaluateAs(XPathBuilder.java:443)

Maybe it should be like the other xpath you have:

.xpath("//SOICanonicalHeader")