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Posted to users@camel.apache.org by Kenneth H <ph...@gmail.com> on 2009/12/14 20:10:44 UTC
Help to understand xpath expression in camel routebuilder
Hi,
I'm trying to udnerstand a camel example, but I'm stuck at a poit where
xpath is used. The builder is shown here:
public void configure() {
from(SERVICE_IN) // SERVICE_IN =
jbi:service:http://esbinaction.com/insurance/insuranceDSLRouter
.convertBodyTo(DOMSource.class) // Convert to DOM tree
.choice()
.when(xpath("//ins:TravelInsuranceRequest").namespace("ins",
"http://dzone.com/insurance"))
.to(TRAVEL_OUT)
.when(xpath("//ins:CarInsuranceRequest").namespace("ins",
"http://dzone.com/insurance"))
.to(LUXURY_CAR_OUT, BUDGET_CAR_OUT)
.otherwise()
.to(FAILURE_OUT);
}
My problem is the "when": what exactly does:
when(xpath("//ins:TravelInsuranceRequest").namespace("ins",
"http://dzone.com/insurance"))
mean?
Can anybody help me?
Kind regards,
Kenneth H
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Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
This is the consumer which the messages is sent to:
<jms:consumer service="fork:terrorReceiver"
endpoint="jmsEndpoint"
targetService="fork:terrorDSLRouter"
destinationName="terror.in"
connectionFactory="#connectionFactory"
marshaler="#TerrorJMSMarshaler"/>
The "TerrorJMSMarshaler" is:
public class TerrorJMSMarshaler extends DefaultConsumerMarshaler {
protected void populateMessage(Message message, NormalizedMessage
normalizedMessage) throws Exception {
if (message instanceof ObjectMessage) {
ObjectMessage objectMessage = (ObjectMessage) message;
Object payload = objectMessage.getObject();
Source source = JiBXUtil.marshalDocument(payload, "UTF-8");
if(payload instanceof TerrorResponse) {
TerrorResponse terrorResponse = (TerrorResponse) payload;
normalizedMessage.setProperty("org.apache.servicemix.eip.splitter.corrid",
terrorResponse.getRequestID());
normalizedMessage.setProperty("org.apache.servicemix.eip.splitter.index",
new Integer(1));
normalizedMessage.setProperty("org.apache.servicemix.eip.splitter.count",
new Integer(2));
}
normalizedMessage.setContent(source);
} else {
throw new UnsupportedOperationException("JMS message is not a
ObjectMessage");
}
}
}
The message is NOT of type TerrorResponse, so it should not jump into the
statement. But from here the JiBXUtil (where the exception is thrown) is
used. Still I can't see where the error is.
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Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
- sorry for all the posts Jon...
If you look at the original Ant build file, you see:
<target name="deploy-insurance" description="Deploy the insurance example">
<echo message="Creating insurance service units" />
<antcall target="gn:create-serviceunit">
</antcall>
<antcall target="gn:create-serviceunit">
</antcall>
The question is now: how do I do the same thing in Maven?
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Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
janstey wrote:
>
> Hmm... JBI deployment question eh... not really sure how to help you off
> the
> top of my head to be honest! Maybe try users@servicemix.apache.org?
>
I'll try there and maybe also some Maven-folks :)
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Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
Hmm... JBI deployment question eh... not really sure how to help you off the
top of my head to be honest! Maybe try users@servicemix.apache.org?
On Wed, Dec 16, 2009 at 2:35 PM, Kenneth H <ph...@gmail.com> wrote:
>
> - sorry for all the posts Jon...
>
> If you look at the original Ant build file, you see ("." infront of "param"
> is to make sure the whole post is shown):
>
> <target name="deploy-insurance" description="Deploy the insurance example">
> <echo message="Creating insurance service units" />
> <antcall target="gn:create-serviceunit">
> <.param name="servicemix-conf" value="servicemix/insurance-jms-su"
> />
> <.param name="service-dest-file" value="insurance-jms-su.zip" />
> <.param name="jibx-mapping" value="jibx/InsuranceMapping.xml" />
> <.param name="include-classes" value="esb/dzone/servicemix/model/*"
> />
> <.param name="include-resource-dir"
> value="servicemix/insurance-jms-su/resources" />
> </antcall>
>
> <antcall target="gn:create-serviceunit">
> <.param name="servicemix-conf" value="servicemix/insurance-file-su"
> />
> <.param name="service-dest-file" value="insurance-file-su.zip" />
> <.param name="include-classes" value="esb/dzone/servicemix/model/*"
> />
> <.param name="jibx-mapping" value="jibx/InsuranceMapping.xml" />
> <.param name="include-resource-dir"
> value="servicemix/insurance-file-su/resources" />
> </antcall>
>
> The question is now: how do I do the same thing in my Maven project?
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26815668.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
- sorry for all the posts Jon...
If you look at the original Ant build file, you see ("." infront of "param"
is to make sure the whole post is shown):
<target name="deploy-insurance" description="Deploy the insurance example">
<echo message="Creating insurance service units" />
<antcall target="gn:create-serviceunit">
<.param name="servicemix-conf" value="servicemix/insurance-jms-su" />
<.param name="service-dest-file" value="insurance-jms-su.zip" />
<.param name="jibx-mapping" value="jibx/InsuranceMapping.xml" />
<.param name="include-classes" value="esb/dzone/servicemix/model/*" />
<.param name="include-resource-dir"
value="servicemix/insurance-jms-su/resources" />
</antcall>
<antcall target="gn:create-serviceunit">
<.param name="servicemix-conf" value="servicemix/insurance-file-su" />
<.param name="service-dest-file" value="insurance-file-su.zip" />
<.param name="include-classes" value="esb/dzone/servicemix/model/*" />
<.param name="jibx-mapping" value="jibx/InsuranceMapping.xml" />
<.param name="include-resource-dir"
value="servicemix/insurance-file-su/resources" />
</antcall>
The question is now: how do I do the same thing in my Maven project?
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Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
>Have you created a mapping file for your custom class? You need to provide
>JiBX with a mapping file so it knows how to do the marshalling. In the
>article, they've defined one for their classes in
>InsuranceSMDZone/jibx/InsuranceMapping.xml
>You got me there, I haven't included this file. Do you know on which
classpath to put it? I'll put in the >same folder as the other two JiBX
classes as a first try.
That's strange. I can't find anywhere where the "InsuranceMapping.xml" is
referenced, so I don't know where to put it?! My project is a Maven project
and the orginal project is build with Ant, so I cannot just create the same
folder as him and put it there.
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Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
janstey wrote:
>
> Have you created a mapping file for your custom class? You need to provide
> JiBX with a mapping file so it knows how to do the marshalling. In the
> article, they've defined one for their classes in
> InsuranceSMDZone/jibx/InsuranceMapping.xml
>
You got me there, I haven't included this file. Do you know on which
classpath to put it? I'll put in the same folder as the other two JiBX
classes as a first try.
--
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Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
Have you created a mapping file for your custom class? You need to provide
JiBX with a mapping file so it knows how to do the marshalling. In the
article, they've defined one for their classes in
InsuranceSMDZone/jibx/InsuranceMapping.xml
On Wed, Dec 16, 2009 at 1:43 PM, Kenneth H <ph...@gmail.com> wrote:
>
>
> janstey wrote:
> >
> > In JBI applications, each SU has its own classloader so I *think* if you
> > make sure that your custom classes are available on the Camel SU's
> > classpath
> > and the JMS SU's classpath all will be well.
> >
>
> You were right. After moving the relevant classes to the classpath
> directory, the exception is gone. However, it would be to easy if things
> just worked, so Servicmix throws a new exception. This time it's JiBX,
> annoying:
>
> javax.jms.JMSException: Error sending JBI exchange
> at
>
> org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:575)
> at
>
> org.apache.servicemix.jms.endpoints.JmsConsumerEndpoint$1.onMessage(JmsConsumerEndpoint.java:505)
> at
>
> org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:518)
> at
>
> org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:479)
> at
>
> org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:451)
> at
>
> org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)
> at
>
> org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)
> at
>
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:982)
> at
>
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:974)
> at
>
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:876)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: org.jibx.runtime.JiBXException: Error marshalling XML to Object
> at terror.util.JiBXUtil.marshalDocument(JiBXUtil.java:51)
> at
> terror.util.TerrorJMSMarshaler.populateMessage(TerrorJMSMarshaler.java:19)
> at
>
> org.apache.servicemix.jms.endpoints.DefaultConsumerMarshaler.createExchange(DefaultConsumerMarshaler.java:99)
> at
>
> org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:544)
> ... 10 more
>
> The function that throws the exceptions is this:
>
> public static Source marshalDocument(Object src, String encoding) throws
> JiBXException {
> Source result = null;
>
> try {
> ByteArrayOutputStream bOut = new ByteArrayOutputStream();
> IMarshallingContext ctx =
> BindingDirectory.getFactory(src.getClass())
> .createMarshallingContext();
> ctx.marshalDocument(src, "UTF-8", null, bOut);
> result = new StreamSource(new
> ByteArrayInputStream(bOut.toByteArray()));
> }
> catch (Exception e) {
> throw new JiBXException("Error marshalling XML to
> Object",e);
> }
> return result;
> }
>
> I don't know where the problems is. The exceptiopns doesn't give much
> information.
>
> Kind regards,
> Kenneth
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26814820.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
janstey wrote:
>
> In JBI applications, each SU has its own classloader so I *think* if you
> make sure that your custom classes are available on the Camel SU's
> classpath
> and the JMS SU's classpath all will be well.
>
You were right. After moving the relevant classes to the classpath
directory, the exception is gone. However, it would be to easy if things
just worked, so Servicmix throws a new exception. This time it's JiBX,
annoying:
javax.jms.JMSException: Error sending JBI exchange
at
org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:575)
at
org.apache.servicemix.jms.endpoints.JmsConsumerEndpoint$1.onMessage(JmsConsumerEndpoint.java:505)
at
org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:518)
at
org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:479)
at
org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:451)
at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)
at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)
at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:982)
at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:974)
at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:876)
at java.lang.Thread.run(Thread.java:619)
Caused by: org.jibx.runtime.JiBXException: Error marshalling XML to Object
at terror.util.JiBXUtil.marshalDocument(JiBXUtil.java:51)
at
terror.util.TerrorJMSMarshaler.populateMessage(TerrorJMSMarshaler.java:19)
at
org.apache.servicemix.jms.endpoints.DefaultConsumerMarshaler.createExchange(DefaultConsumerMarshaler.java:99)
at
org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:544)
... 10 more
The function that throws the exceptions is this:
public static Source marshalDocument(Object src, String encoding) throws
JiBXException {
Source result = null;
try {
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
IMarshallingContext ctx = BindingDirectory.getFactory(src.getClass())
.createMarshallingContext();
ctx.marshalDocument(src, "UTF-8", null, bOut);
result = new StreamSource(new ByteArrayInputStream(bOut.toByteArray()));
}
catch (Exception e) {
throw new JiBXException("Error marshalling XML to Object",e);
}
return result;
}
I don't know where the problems is. The exceptiopns doesn't give much
information.
Kind regards,
Kenneth
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Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
In JBI applications, each SU has its own classloader so I *think* if you
make sure that your custom classes are available on the Camel SU's classpath
and the JMS SU's classpath all will be well.
On Tue, Dec 15, 2009 at 5:50 PM, Kenneth H <ph...@gmail.com> wrote:
>
> > > One last novice question. In the statement:
> > >
> > > from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
> > >
> > > Where does the "foo" comes from, I mean, where do I set it? From
> Eclipse
> > > I'm
> > > creating a JMS Message, but the only headers availbe is these:
> > >
> > >
> > >
> >
> http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
> > >
> > > Do you know how I can use these headers/properties in a Camel choice
> > > statement? Basicly, I just want to create the most simple example,
> where
> > > to
> > > messages are send from Eclipse and goes to two different queues in a
> > Camel
> > > choice statement. The messages should be simple tect or objects.
> > >
> >
> > >You should be able to access any of the JMS headers you mentioned in the
> > >same way the "foo" header is referenced. So how are you sending JMS
> > messages
> > >from Eclipse? I'm assuming its a function of Tivoli in the link you
> > >provided?
> >
> > I (or the writer of the document I'm reading) made af "Response" class
> > called "InsuranceResponse". The response class is sent to the Camel
> > Routebuilder. I would like to swith on either the classname of the object
> > I'm sending or a field, e.g. "CompanyName", in the object. I create/send
> > like this:
> >
> > ObjectMessage insuranceMessage = session.createObjectMessage();
> > InsuranceResponse response = new InsuranceResponse();
> > response.setRequestID("1");
> > response.setInsuranceCompanyName("Luxury Cars");
> > response.setPrice(100f);
> > response.setResponseID(UUID.randomUUID().toString());
> > insuranceMessage.setObject(response);
> > producer.send(insuranceMessage);
> >
> > Then I receive like this ("responseMessage" returns null all the time,
> but
> > I
> > guess it's beacuse my Camel Routebuilder isn't wotking, so no object is
> > send
> > to the queue):
> >
> > ObjectMessage responseMessage = (ObjectMessage) consumer.receive();
> > InsuranceResponse insuranceMessageReceived = (InsuranceResponse)
> > responseMessage.getObject();
>
>
> >>So I think you are looking at:
>
> >>http://soa.dzone.com/articles/pattern-based-development-with-0?page=0,3
>
> Exactly. I'm hoping to use some of it as part of my master thesis.
>
> >>And it looks like they are using JIBX to convert between
> InsuranceResponses
> >>and XML. So, in the Camel route, the message is already in XML form so we
> >>can use an XPath expression something like the following to switch on the
> >>company name:
>
> Yes, I'm still with you.
>
> >>xpath("//ins:TravelInsuranceRequest/ins:insuranceCompanyName/text() =
> >>'Luxury Cars'").namespace("ins","http://dzone.com/insurance")
>
> >>I haven't booted up the example myself so I don't know why you are not
> >>getting any messages using the raw JMS API. Do the ServiceMix logs or
> Camel
> >>logs with trace enabled give you any more info on where the holdup could
> be?
>
> I don't think the message even get to the Camel router. The error
> Servicemix
> throws is:
>
> javax.jms.JMSException: Error sending JBI exchange
> at
>
> org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:575)
> at
>
> org.apache.servicemix.jms.endpoints.JmsConsumerEndpoint$1.onMessage(JmsConsumerEndpoint.java:505)
> at
>
> org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:518)
> at
>
> org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:479)
> at
>
> org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:451)
> at
>
> org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)
> at
>
> org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)
> at
>
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:982)
> at
>
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:974)
> at
>
> org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:876)
> at java.lang.Thread.run(Thread.java:619)
> Caused by: javax.jms.JMSException: Failed to build body from bytes. Reason:
> java.io.IOException: terror.model.TerrorType1Request
> at
>
> org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:35)
> at
>
> org.apache.activemq.command.ActiveMQObjectMessage.getObject(ActiveMQObjectMessage.java:183)
> at
> kenneth.util.TerrorJMSMarshaler.populateMessage(TerrorJMSMarshaler.java:15)
> at
>
> org.apache.servicemix.jms.endpoints.DefaultConsumerMarshaler.createExchange(DefaultConsumerMarshaler.java:99)
> at
>
> org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:544)
> ... 10 more
>
> I looked the error up on the net and found:
>
> http://www.mail-archive.com/user@geronimo.apache.org/msg10579.html
> http://issues.apache.org/activemq/browse/AMQ-1588
>
> It seems like there is a problem with deserializing the object I'm sending,
> but I don't quite understand how to fix it. The two answers above talks
> about moving some classes? Any ideas to solve it?
>
>
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26801956.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
> > One last novice question. In the statement:
> >
> > from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
> >
> > Where does the "foo" comes from, I mean, where do I set it? From Eclipse
> > I'm
> > creating a JMS Message, but the only headers availbe is these:
> >
> >
> >
> http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
> >
> > Do you know how I can use these headers/properties in a Camel choice
> > statement? Basicly, I just want to create the most simple example, where
> > to
> > messages are send from Eclipse and goes to two different queues in a
> Camel
> > choice statement. The messages should be simple tect or objects.
> >
>
> >You should be able to access any of the JMS headers you mentioned in the
> >same way the "foo" header is referenced. So how are you sending JMS
> messages
> >from Eclipse? I'm assuming its a function of Tivoli in the link you
> >provided?
>
> I (or the writer of the document I'm reading) made af "Response" class
> called "InsuranceResponse". The response class is sent to the Camel
> Routebuilder. I would like to swith on either the classname of the object
> I'm sending or a field, e.g. "CompanyName", in the object. I create/send
> like this:
>
> ObjectMessage insuranceMessage = session.createObjectMessage();
> InsuranceResponse response = new InsuranceResponse();
> response.setRequestID("1");
> response.setInsuranceCompanyName("Luxury Cars");
> response.setPrice(100f);
> response.setResponseID(UUID.randomUUID().toString());
> insuranceMessage.setObject(response);
> producer.send(insuranceMessage);
>
> Then I receive like this ("responseMessage" returns null all the time, but
> I
> guess it's beacuse my Camel Routebuilder isn't wotking, so no object is
> send
> to the queue):
>
> ObjectMessage responseMessage = (ObjectMessage) consumer.receive();
> InsuranceResponse insuranceMessageReceived = (InsuranceResponse)
> responseMessage.getObject();
>>So I think you are looking at:
>>http://soa.dzone.com/articles/pattern-based-development-with-0?page=0,3
Exactly. I'm hoping to use some of it as part of my master thesis.
>>And it looks like they are using JIBX to convert between
InsuranceResponses
>>and XML. So, in the Camel route, the message is already in XML form so we
>>can use an XPath expression something like the following to switch on the
>>company name:
Yes, I'm still with you.
>>xpath("//ins:TravelInsuranceRequest/ins:insuranceCompanyName/text() =
>>'Luxury Cars'").namespace("ins","http://dzone.com/insurance")
>>I haven't booted up the example myself so I don't know why you are not
>>getting any messages using the raw JMS API. Do the ServiceMix logs or
Camel
>>logs with trace enabled give you any more info on where the holdup could
be?
I don't think the message even get to the Camel router. The error Servicemix
throws is:
javax.jms.JMSException: Error sending JBI exchange
at
org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:575)
at
org.apache.servicemix.jms.endpoints.JmsConsumerEndpoint$1.onMessage(JmsConsumerEndpoint.java:505)
at
org.springframework.jms.listener.AbstractMessageListenerContainer.doInvokeListener(AbstractMessageListenerContainer.java:518)
at
org.springframework.jms.listener.AbstractMessageListenerContainer.invokeListener(AbstractMessageListenerContainer.java:479)
at
org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:451)
at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:323)
at
org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:261)
at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:982)
at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.executeOngoingLoop(DefaultMessageListenerContainer.java:974)
at
org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:876)
at java.lang.Thread.run(Thread.java:619)
Caused by: javax.jms.JMSException: Failed to build body from bytes. Reason:
java.io.IOException: terror.model.TerrorType1Request
at
org.apache.activemq.util.JMSExceptionSupport.create(JMSExceptionSupport.java:35)
at
org.apache.activemq.command.ActiveMQObjectMessage.getObject(ActiveMQObjectMessage.java:183)
at
kenneth.util.TerrorJMSMarshaler.populateMessage(TerrorJMSMarshaler.java:15)
at
org.apache.servicemix.jms.endpoints.DefaultConsumerMarshaler.createExchange(DefaultConsumerMarshaler.java:99)
at
org.apache.servicemix.jms.endpoints.AbstractConsumerEndpoint.onMessage(AbstractConsumerEndpoint.java:544)
... 10 more
I looked the error up on the net and found:
http://www.mail-archive.com/user@geronimo.apache.org/msg10579.html
http://issues.apache.org/activemq/browse/AMQ-1588
It seems like there is a problem with deserializing the object I'm sending,
but I don't quite understand how to fix it. The two answers above talks
about moving some classes? Any ideas to solve it?
--
View this message in context: http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26801956.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
On Tue, Dec 15, 2009 at 1:33 PM, Kenneth H <ph...@gmail.com> wrote:
>
>
> On Tue, Dec 15, 2009 at 11:26 AM, Kenneth H <ph...@gmail.com> wrote:
>
>
> > > 1. Where can I read about the ".namespace()" function syntax? I still
> > don't
> > > get why "ins" is used in both functions. I tried w3schools but didn't
> > find
> > > it.
>
>
> > >Did you find this page?
> > >http://www.w3schools.com/XML/xml_namespaces.asp
> > >
> > >That should help you understand usage of the namespace prefix and URI.>
> > >
> >
> > I know namespaces in general, bit it was the syntax of the ".namespace()"
> > function in xpath, I was looking for.
> >
>
> >Ah Cool stuff. The public javadoc may be helpful to you then
>
> >http://camel.apache.org/maven/camel-
> >core/apidocs/org/apache/camel/builder/xml/XPathBuilder.html#namespace(java.lang.String,%>20java.lang.String)
>
> Perfect. Actually I was looking here earlier, but I must have missed it.
>
>
> > > 2. Is it possible to debug in the Camel routebuilder somehow? If I want
> > to
> > > know how the message looks like before and after the
> > > ".convertBodyTo(DOMSource.class)". And most important: I want to know
> if
> > > an
> > > expression evaluates to true, i.e. I want to "print-out" the result of
> > the
> > > when statement. Maybe something like this pseudocode:
> > >
> > > var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
> > > "ins","http://dzone.com/insurance"))
> > >
> > > print(travelRequest);
> > >
> > > .when(travelRequest).to(LUXURY_CAR_OUT);
> > >
> >
> > >I guess it depends on how you have this deployed... if its a JUnit test,
> > >well Eclipse or IntelliJ can easily debug that for you. Other setups may
> > >require extra configuration of the app server / ESB to get debugging
> > >working. Actually, if you just want to see what the messages look like
> at
> > >various points in your route, try enabling the tracer
> > >http://camel.apache.org/tracer.html
> >
> >
> > I will look into the tracer - didn't know of that. I have just created a
> > Maven project and deployed it on the Servicemix ESB. Hard to find out how
> > to
> > debug :)
> >
>
> >If you are using the latest ServiceMix, you can follow some notes here to
> >turn on debugging
> >
> https://repository.apache.org/content/groups/public/org/apache/felix/karaf/manual/1.3.0-
> >SNAPSHOT/manual-1.3.0-SNAPSHOT.html#KarafUsers%27Guideinonepage-5.1.Troubleshooting%>2CDebuggingandProfiling
>
> This might be very helpful to me!
>
> >
> > One last novice question. In the statement:
> >
> > from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
> >
> > Where does the "foo" comes from, I mean, where do I set it? From Eclipse
> > I'm
> > creating a JMS Message, but the only headers availbe is these:
> >
> >
> >
> http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
> >
> > Do you know how I can use these headers/properties in a Camel choice
> > statement? Basicly, I just want to create the most simple example, where
> > to
> > messages are send from Eclipse and goes to two different queues in a
> Camel
> > choice statement. The messages should be simple tect or objects.
> >
>
> >You should be able to access any of the JMS headers you mentioned in the
> >same way the "foo" header is referenced. So how are you sending JMS
> messages
> >from Eclipse? I'm assuming its a function of Tivoli in the link you
> >provided?
>
> I (or the writer of the document I'm reading) made af "Response" class
> called "InsuranceResponse". The response class is sent to the Camel
> Routebuilder. I would like to swith on either the classname of the object
> I'm sending or a field, e.g. "CompanyName", in the object. I create/send
> like this:
>
> ObjectMessage insuranceMessage = session.createObjectMessage();
> InsuranceResponse response = new InsuranceResponse();
> response.setRequestID("1");
> response.setInsuranceCompanyName("Luxury Cars");
> response.setPrice(100f);
> response.setResponseID(UUID.randomUUID().toString());
> insuranceMessage.setObject(response);
> producer.send(insuranceMessage);
>
> Then I receive like this ("responseMessage" returns null all the time, but
> I
> guess it's beacuse my Camel Routebuilder isn't wotking, so no object is
> send
> to the queue):
>
> ObjectMessage responseMessage = (ObjectMessage) consumer.receive();
> InsuranceResponse insuranceMessageReceived = (InsuranceResponse)
> responseMessage.getObject();
>
So I think you are looking at:
http://soa.dzone.com/articles/pattern-based-development-with-0?page=0,3
And it looks like they are using JIBX to convert between InsuranceResponses
and XML. So, in the Camel route, the message is already in XML form so we
can use an XPath expression something like the following to switch on the
company name:
xpath("//ins:TravelInsuranceRequest/ins:insuranceCompanyName/text() =
'Luxury Cars'").namespace("ins","http://dzone.com/insurance")
I haven't booted up the example myself so I don't know why you are not
getting any messages using the raw JMS API. Do the ServiceMix logs or Camel
logs with trace enabled give you any more info on where the holdup could be?
>
>
> >>You can also use Camel to set a header like so
>
> >>from("seda:a").setHeader("foo", constant("bar"))...
>
> Cool. But what is the corresponding function in Eclipse/JMS to the
> "setHeader"?!
>
>
> Kind regards
> Kenneth H
>
>
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26798115.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
On Tue, Dec 15, 2009 at 1:33 PM, Kenneth H <ph...@gmail.com> wrote:
>
>
> On Tue, Dec 15, 2009 at 11:26 AM, Kenneth H <ph...@gmail.com> wrote:
>
>
> > > 1. Where can I read about the ".namespace()" function syntax? I still
> > don't
> > > get why "ins" is used in both functions. I tried w3schools but didn't
> > find
> > > it.
>
>
> > >Did you find this page?
> > >http://www.w3schools.com/XML/xml_namespaces.asp
> > >
> > >That should help you understand usage of the namespace prefix and URI.>
> > >
> >
> > I know namespaces in general, bit it was the syntax of the ".namespace()"
> > function in xpath, I was looking for.
> >
>
> >Ah Cool stuff. The public javadoc may be helpful to you then
>
> >http://camel.apache.org/maven/camel-
> >core/apidocs/org/apache/camel/builder/xml/XPathBuilder.html#namespace(java.lang.String,%>20java.lang.String)
>
> Perfect. Actually I was looking here earlier, but I must have missed it.
>
>
> > > 2. Is it possible to debug in the Camel routebuilder somehow? If I want
> > to
> > > know how the message looks like before and after the
> > > ".convertBodyTo(DOMSource.class)". And most important: I want to know
> if
> > > an
> > > expression evaluates to true, i.e. I want to "print-out" the result of
> > the
> > > when statement. Maybe something like this pseudocode:
> > >
> > > var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
> > > "ins","http://dzone.com/insurance"))
> > >
> > > print(travelRequest);
> > >
> > > .when(travelRequest).to(LUXURY_CAR_OUT);
> > >
> >
> > >I guess it depends on how you have this deployed... if its a JUnit test,
> > >well Eclipse or IntelliJ can easily debug that for you. Other setups may
> > >require extra configuration of the app server / ESB to get debugging
> > >working. Actually, if you just want to see what the messages look like
> at
> > >various points in your route, try enabling the tracer
> > >http://camel.apache.org/tracer.html
> >
> >
> > I will look into the tracer - didn't know of that. I have just created a
> > Maven project and deployed it on the Servicemix ESB. Hard to find out how
> > to
> > debug :)
> >
>
> >If you are using the latest ServiceMix, you can follow some notes here to
> >turn on debugging
> >
> https://repository.apache.org/content/groups/public/org/apache/felix/karaf/manual/1.3.0-
> >SNAPSHOT/manual-1.3.0-SNAPSHOT.html#KarafUsers%27Guideinonepage-5.1.Troubleshooting%>2CDebuggingandProfiling
>
> This might be very helpful to me!
>
> >
> > One last novice question. In the statement:
> >
> > from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
> >
> > Where does the "foo" comes from, I mean, where do I set it? From Eclipse
> > I'm
> > creating a JMS Message, but the only headers availbe is these:
> >
> >
> >
> http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
> >
> > Do you know how I can use these headers/properties in a Camel choice
> > statement? Basicly, I just want to create the most simple example, where
> > to
> > messages are send from Eclipse and goes to two different queues in a
> Camel
> > choice statement. The messages should be simple tect or objects.
> >
>
> >You should be able to access any of the JMS headers you mentioned in the
> >same way the "foo" header is referenced. So how are you sending JMS
> messages
> >from Eclipse? I'm assuming its a function of Tivoli in the link you
> >provided?
>
> I (or the writer of the document I'm reading) made af "Response" class
> called "InsuranceResponse". The response class is sent to the Camel
> Routebuilder. I would like to swith on either the classname of the object
> I'm sending or a field, e.g. "CompanyName", in the object. I create/send
> like this:
>
> ObjectMessage insuranceMessage = session.createObjectMessage();
> InsuranceResponse response = new InsuranceResponse();
> response.setRequestID("1");
> response.setInsuranceCompanyName("Luxury Cars");
> response.setPrice(100f);
> response.setResponseID(UUID.randomUUID().toString());
> insuranceMessage.setObject(response);
> producer.send(insuranceMessage);
>
> Then I receive like this ("responseMessage" returns null all the time, but
> I
> guess it's beacuse my Camel Routebuilder isn't wotking, so no object is
> send
> to the queue):
>
> ObjectMessage responseMessage = (ObjectMessage) consumer.receive();
> InsuranceResponse insuranceMessageReceived = (InsuranceResponse)
> responseMessage.getObject();
>
>
> >>You can also use Camel to set a header like so
>
> >>from("seda:a").setHeader("foo", constant("bar"))...
>
> Cool. But what is the corresponding function in Eclipse/JMS to the
> "setHeader"?!
>
You are using the raw JMS API so you can set a property on the ObjectMessage
before sending. See:
http://java.sun.com/j2ee/1.4/docs/api/javax/jms/Message.html
>
>
> Kind regards
> Kenneth H
>
>
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26798115.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
On Tue, Dec 15, 2009 at 11:26 AM, Kenneth H <ph...@gmail.com> wrote:
> > 1. Where can I read about the ".namespace()" function syntax? I still
> don't
> > get why "ins" is used in both functions. I tried w3schools but didn't
> find
> > it.
> >Did you find this page?
> >http://www.w3schools.com/XML/xml_namespaces.asp
> >
> >That should help you understand usage of the namespace prefix and URI.>
> >
>
> I know namespaces in general, bit it was the syntax of the ".namespace()"
> function in xpath, I was looking for.
>
>Ah Cool stuff. The public javadoc may be helpful to you then
>http://camel.apache.org/maven/camel->core/apidocs/org/apache/camel/builder/xml/XPathBuilder.html#namespace(java.lang.String,%>20java.lang.String)
Perfect. Actually I was looking here earlier, but I must have missed it.
> > 2. Is it possible to debug in the Camel routebuilder somehow? If I want
> to
> > know how the message looks like before and after the
> > ".convertBodyTo(DOMSource.class)". And most important: I want to know if
> > an
> > expression evaluates to true, i.e. I want to "print-out" the result of
> the
> > when statement. Maybe something like this pseudocode:
> >
> > var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
> > "ins","http://dzone.com/insurance"))
> >
> > print(travelRequest);
> >
> > .when(travelRequest).to(LUXURY_CAR_OUT);
> >
>
> >I guess it depends on how you have this deployed... if its a JUnit test,
> >well Eclipse or IntelliJ can easily debug that for you. Other setups may
> >require extra configuration of the app server / ESB to get debugging
> >working. Actually, if you just want to see what the messages look like at
> >various points in your route, try enabling the tracer
> >http://camel.apache.org/tracer.html
>
>
> I will look into the tracer - didn't know of that. I have just created a
> Maven project and deployed it on the Servicemix ESB. Hard to find out how
> to
> debug :)
>
>If you are using the latest ServiceMix, you can follow some notes here to
>turn on debugging
>https://repository.apache.org/content/groups/public/org/apache/felix/karaf/manual/1.3.0->SNAPSHOT/manual-1.3.0-SNAPSHOT.html#KarafUsers%27Guideinonepage-5.1.Troubleshooting%>2CDebuggingandProfiling
This might be very helpful to me!
>
> One last novice question. In the statement:
>
> from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
>
> Where does the "foo" comes from, I mean, where do I set it? From Eclipse
> I'm
> creating a JMS Message, but the only headers availbe is these:
>
>
> http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
>
> Do you know how I can use these headers/properties in a Camel choice
> statement? Basicly, I just want to create the most simple example, where
> to
> messages are send from Eclipse and goes to two different queues in a Camel
> choice statement. The messages should be simple tect or objects.
>
>You should be able to access any of the JMS headers you mentioned in the
>same way the "foo" header is referenced. So how are you sending JMS
messages
>from Eclipse? I'm assuming its a function of Tivoli in the link you
>provided?
I (or the writer of the document I'm reading) made af "Response" class
called "InsuranceResponse". The response class is sent to the Camel
Routebuilder. I would like to swith on either the classname of the object
I'm sending or a field, e.g. "CompanyName", in the object. I create/send
like this:
ObjectMessage insuranceMessage = session.createObjectMessage();
InsuranceResponse response = new InsuranceResponse();
response.setRequestID("1");
response.setInsuranceCompanyName("Luxury Cars");
response.setPrice(100f);
response.setResponseID(UUID.randomUUID().toString());
insuranceMessage.setObject(response);
producer.send(insuranceMessage);
Then I receive like this ("responseMessage" returns null all the time, but I
guess it's beacuse my Camel Routebuilder isn't wotking, so no object is send
to the queue):
ObjectMessage responseMessage = (ObjectMessage) consumer.receive();
InsuranceResponse insuranceMessageReceived = (InsuranceResponse)
responseMessage.getObject();
>>You can also use Camel to set a header like so
>>from("seda:a").setHeader("foo", constant("bar"))...
Cool. But what is the corresponding function in Eclipse/JMS to the
"setHeader"?!
Kind regards
Kenneth H
--
View this message in context: http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26798115.html
Sent from the Camel - Users mailing list archive at Nabble.com.
Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
On Tue, Dec 15, 2009 at 11:26 AM, Kenneth H <ph...@gmail.com> wrote:
>
> > 1. Where can I read about the ".namespace()" function syntax? I still
> don't
> > get why "ins" is used in both functions. I tried w3schools but didn't
> find
> > it.
>
>
> >Did you find this page?
> >http://www.w3schools.com/XML/xml_namespaces.asp
> >
> >That should help you understand usage of the namespace prefix and URI.>
> >
>
> I know namespaces in general, bit it was the syntax of the ".namespace()"
> function in xpath, I was looking for.
>
Ah Cool stuff. The public javadoc may be helpful to you then
http://camel.apache.org/maven/camel-core/apidocs/org/apache/camel/builder/xml/XPathBuilder.html#namespace(java.lang.String,%20java.lang.String)
>
>
> > 2. Is it possible to debug in the Camel routebuilder somehow? If I want
> to
> > know how the message looks like before and after the
> > ".convertBodyTo(DOMSource.class)". And most important: I want to know if
> > an
> > expression evaluates to true, i.e. I want to "print-out" the result of
> the
> > when statement. Maybe something like this pseudocode:
> >
> > var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
> > "ins","http://dzone.com/insurance"))
> >
> > print(travelRequest);
> >
> > .when(travelRequest).to(LUXURY_CAR_OUT);
> >
>
> >I guess it depends on how you have this deployed... if its a JUnit test,
> >well Eclipse or IntelliJ can easily debug that for you. Other setups may
> >require extra configuration of the app server / ESB to get debugging
> >working. Actually, if you just want to see what the messages look like at
> >various points in your route, try enabling the tracer
> >http://camel.apache.org/tracer.html
>
>
> I will look into the tracer - didn't know of that. I have just created a
> Maven project and deployed it on the Servicemix ESB. Hard to find out how
> to
> debug :)
>
If you are using the latest ServiceMix, you can follow some notes here to
turn on debugging
https://repository.apache.org/content/groups/public/org/apache/felix/karaf/manual/1.3.0-SNAPSHOT/manual-1.3.0-SNAPSHOT.html#KarafUsers%27Guideinonepage-5.1.Troubleshooting%2CDebuggingandProfiling
>
> One last novice question. In the statement:
>
> from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
>
> Where does the "foo" comes from, I mean, where do I set it? From Eclipse
> I'm
> creating a JMS Message, but the only headers availbe is these:
>
>
> http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
>
> Do you know how I can use these headers/properties in a Camel choice
> statement? Basicly, I just want to create the most simple example, where to
> messages are send from Eclipse and goes to two different queues in a Camel
> choice statement. The messages should be simple tect or objects.
>
You should be able to access any of the JMS headers you mentioned in the
same way the "foo" header is referenced. So how are you sending JMS messages
from Eclipse? I'm assuming its a function of Tivoli in the link you
provided?
You can also use Camel to set a header like so
from("seda:a").setHeader("foo", constant("bar"))...
>
> Kend regards,
> Kenneth H
>
>
>
>
>
>
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26795823.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
> 1. Where can I read about the ".namespace()" function syntax? I still don't
> get why "ins" is used in both functions. I tried w3schools but didn't find
> it.
>Did you find this page?
>http://www.w3schools.com/XML/xml_namespaces.asp
>
>That should help you understand usage of the namespace prefix and URI.>
>
I know namespaces in general, bit it was the syntax of the ".namespace()"
function in xpath, I was looking for.
> 2. Is it possible to debug in the Camel routebuilder somehow? If I want to
> know how the message looks like before and after the
> ".convertBodyTo(DOMSource.class)". And most important: I want to know if
> an
> expression evaluates to true, i.e. I want to "print-out" the result of the
> when statement. Maybe something like this pseudocode:
>
> var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
> "ins","http://dzone.com/insurance"))
>
> print(travelRequest);
>
> .when(travelRequest).to(LUXURY_CAR_OUT);
>
>I guess it depends on how you have this deployed... if its a JUnit test,
>well Eclipse or IntelliJ can easily debug that for you. Other setups may
>require extra configuration of the app server / ESB to get debugging
>working. Actually, if you just want to see what the messages look like at
>various points in your route, try enabling the tracer
>http://camel.apache.org/tracer.html
I will look into the tracer - didn't know of that. I have just created a
Maven project and deployed it on the Servicemix ESB. Hard to find out how to
debug :)
One last novice question. In the statement:
from("seda:a").filter(header("foo").isEqualTo("bar")).to("seda:b");
Where does the "foo" comes from, I mean, where do I set it? From Eclipse I'm
creating a JMS Message, but the only headers availbe is these:
http://publib.boulder.ibm.com/infocenter/tivihelp/v2r1/index.jsp?topic=/com.ibm.IBMDI.doc/referenceguide95.htm
Do you know how I can use these headers/properties in a Camel choice
statement? Basicly, I just want to create the most simple example, where to
messages are send from Eclipse and goes to two different queues in a Camel
choice statement. The messages should be simple tect or objects.
Kend regards,
Kenneth H
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Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
On Tue, Dec 15, 2009 at 9:43 AM, Kenneth H <ph...@gmail.com> wrote:
>
> Hi Jon,
>
> Your answer definitely helped. I have a couple of more questions though:
>
> 1. Where can I read about the ".namespace()" function syntax? I still don't
> get why "ins" is used in both functions. I tried w3schools but didn't find
> it.
>
Did you find this page?
http://www.w3schools.com/XML/xml_namespaces.asp
That should help you understand usage of the namespace prefix and URI.
>
> 2. Is it possible to debug in the Camel routebuilder somehow? If I want to
> know how the message looks like before and after the
> ".convertBodyTo(DOMSource.class)". And most important: I want to know if an
> expression evaluates to true, i.e. I want to "print-out" the result of the
> when statement. Maybe something like this pseudocode:
>
> var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
> "ins","http://dzone.com/insurance"))
>
> print(travelRequest);
>
> .when(travelRequest).to(LUXURY_CAR_OUT);
>
I guess it depends on how you have this deployed... if its a JUnit test,
well Eclipse or IntelliJ can easily debug that for you. Other setups may
require extra configuration of the app server / ESB to get debugging
working. Actually, if you just want to see what the messages look like at
various points in your route, try enabling the tracer
http://camel.apache.org/tracer.html
>
> Kind regards,
> Kenneth H
>
>
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26794573.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com
Re: Help to understand xpath expression in camel routebuilder
Posted by Kenneth H <ph...@gmail.com>.
Hi Jon,
Your answer definitely helped. I have a couple of more questions though:
1. Where can I read about the ".namespace()" function syntax? I still don't
get why "ins" is used in both functions. I tried w3schools but didn't find
it.
2. Is it possible to debug in the Camel routebuilder somehow? If I want to
know how the message looks like before and after the
".convertBodyTo(DOMSource.class)". And most important: I want to know if an
expression evaluates to true, i.e. I want to "print-out" the result of the
when statement. Maybe something like this pseudocode:
var travelRequest = xpath("//ins:TravelInsuranceRequest").namespace
"ins","http://dzone.com/insurance"))
print(travelRequest);
.when(travelRequest).to(LUXURY_CAR_OUT);
Kind regards,
Kenneth H
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Re: Help to understand xpath expression in camel routebuilder
Posted by Jon Anstey <ja...@gmail.com>.
The xpath expression is going to be evaluated against the incoming message
body. So, if we have a message like:
<?xml version="1.0" encoding="UTF-8"?>
<TravelInsuranceRequest xmlns="http://dzone.com/insurance">
...
</TravelInsuranceRequest>
the first when clause will evaluate to true since the xpath expression is
searching for any element like "TravelInsuranceRequest". The namespace bit
tells Camel to search for TravelInsuranceRequest elements only in the
http://dzone.com/insurance namespace.
Does this help any?
On Mon, Dec 14, 2009 at 3:40 PM, Kenneth H <ph...@gmail.com> wrote:
>
> Hi,
>
> I'm trying to udnerstand a camel example, but I'm stuck at a poit where
> xpath is used. The builder is shown here:
>
> public void configure() {
> from(SERVICE_IN) // SERVICE_IN =
> jbi:service:http://esbinaction.com/insurance/insuranceDSLRouter
> .convertBodyTo(DOMSource.class) // Convert to DOM
> tree
> .choice()
>
> .when(xpath("//ins:TravelInsuranceRequest").namespace("ins",
> "http://dzone.com/insurance"))
> .to(TRAVEL_OUT)
>
> .when(xpath("//ins:CarInsuranceRequest").namespace("ins",
> "http://dzone.com/insurance"))
> .to(LUXURY_CAR_OUT, BUDGET_CAR_OUT)
> .otherwise()
> .to(FAILURE_OUT);
> }
>
> My problem is the "when": what exactly does:
>
> when(xpath("//ins:TravelInsuranceRequest").namespace("ins",
> "http://dzone.com/insurance"))
>
> mean?
>
> Can anybody help me?
>
> Kind regards,
> Kenneth H
> --
> View this message in context:
> http://old.nabble.com/Help-to-understand-xpath-expression-in-camel-routebuilder-tp26779963p26779963.html
> Sent from the Camel - Users mailing list archive at Nabble.com.
>
>
--
Cheers,
Jon
Camel in Action: http://manning.com/ibsen
Blog: http://janstey.blogspot.com