On Tue, Apr 24, 2012 at 11:23 PM, Bob Jolliffe <bobjolli...@gmail.com> wrote:
> On 24 April 2012 16:36, Claus Ibsen <claus.ib...@gmail.com> wrote:
>> On Tue, Apr 24, 2012 at 5:11 PM, Bob Jolliffe <bobjolli...@gmail.com> wrote:
>>> On 24 April 2012 15:22, Claus Ibsen <claus.ib...@gmail.com> wrote:
>>>> Hi
>>>>
>>>> Thanks
>>>>
>>>> Just to be sure how do you refer to this external file?
>>>>
>>>
>>> I'm loading it with:
>>>
>>> FileInputStream is = new FileInputStream( file );
>>>
>>> try
>>> {
>>> RoutesDefinition routes = camelContext.loadRoutesDefinition( is );
>>> camelContext.addRouteDefinitions( routes.getRoutes() );
>>> }
>>> catch ( Exception e )
>>> {
>>> log.info( "Unable to load route: " + e.getMessage() );
>>> return ERROR;
>>> }
>>>
>>
>> Ah okay, I don't think namespaces is injected into the xpath/xquery
>> predicates/expression when you do it like that.
>> This is done using JAXB which loads the model from the XML. It would
>> require a bit more effort to discover the custom namespace
>> declarations.
>>
>
> Yes I am afraid you are right. Trying to think what workarounds there
> might be for this. Unfortunately we have no way of knowing in advance
> which namespaces we might be dealing with so I need a general
> mechanism for loading routes at runtime and being able to process
> various types of xml. I wonder how easy it might be to create my own
> xpath based splitter which handled the namespace issue? Maybe more
> trouble than it is worth.
>
Maybe the loadRoutesDefinition method could be improved to scan for
namespaces in the XML file, before
doing JAXB. Then we may be able to gather the custom namespaces. And
then add those to the models
of Camel that support namespaces.
> As a general suggestion, wouldn't it be a good idea generally for
> there to be a way of making the xpath expression aware of certain
> namespaces by picking up an xmlns declaration closer to where it is
> used. eg on the xpath element like <xpath xmlns:d="..">...</xapth>?
>
Yeah that could be a good idea. I am not sure if JAXB supports this
when it marshal from XML to JAXB objects.
In all cases feel free to log a JIRA ticket. It would be nice to look
into this and support this out of the box.
Any XML and XPath stuff usually uses namespaces, so it affects more users.
> I guess in the meantime I can make all my xpath expressions use local-name().
>
> Regards
> Bob
>
>>
>>
>>>>
>>>>
>>>>
>>>> On Mon, Apr 23, 2012 at 6:54 PM, Bob Jolliffe <bobjolli...@gmail.com>
>>>> wrote:
>>>>> On 23 April 2012 17:29, Claus Ibsen <claus.ib...@gmail.com> wrote:
>>>>>> Hi
>>>>>>
>>>>>> Do you declare the route in an external file, or how do you refer to
>>>>>> the xml file with that route?
>>>>>> Maybe you can post your full XML files.
>>>>>
>>>>> I have the route declared in an external file. The following is a
>>>>> complete listing of the file which illustrates the problem:
>>>>>
>>>>> <?xml version="1.0" encoding="UTF-8"?>
>>>>> <route xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>>>>> xsi:schemaLocation="http://camel.apache.org/schema/spring
>>>>> camel-spring-2.9.1.xsd"
>>>>> xmlns="http://camel.apache.org/schema/spring";
>>>>> xmlns:d="http://dhis2.org/schema/dxf/2.0";
>>>>> id="dataUpdater">
>>>>>
>>>>> <description>Import Metadata</description>
>>>>> <!-- every now and again ... -->
>>>>> <from
>>>>> uri="quartz://halfminute?trigger.repeatInterval=300000&trigger.repeatCount=10"/>
>>>>> <to
>>>>> uri="http://localhost/trunk/api/metaData.xml"/>
>>>>> <split>
>>>>> <xpath>/d:dxf/d:organisationUnits/d:orgainsationUnit</xpath>
>>>>> <log loggingLevel="INFO" message="Processed one orgunit" />
>>>>> </split>
>>>>> </route>
>>>>>
>>>>> The error I get is:
>>>>> Failed delivery for (MessageId:
>>>>> ID-bobs-laptop-39546-1335131554800-0-25 on ExchangeId:
>>>>> ID-bobs-laptop-39546-1335131554800-0-24). Exhausted after delivery
>>>>> attempt: 1 caught:
>>>>> org.apache.camel.builder.xml.InvalidXPathExpression: Invalid xpath:
>>>>> /d:dxf/d:organisationUnits/d:orgainsationUnit. Reason:
>>>>> javax.xml.xpath.XPathExpressionException (MarkerIgnoringBase.java
>>>>> [DefaultQuartzScheduler-camel-builtin_Worker-2])
>>>>>
>>>>> Note that I have declared xmlns:d="http://dhis2.org/schema/dxf/2.0"; on
>>>>> the route element. It seems this is not being picked up.
>>>>>
>>>>> Regards
>>>>> Bob
>>>>>
>>>>>>
>>>>>>
>>>>>> On Mon, Apr 23, 2012 at 6:23 PM, Bob Jolliffe <bobjolli...@gmail.com>
>>>>>> wrote:
>>>>>>> I have an application where I load a camel context using spring and
>>>>>>> then add different spring dsl routes particular to individual site
>>>>>>> configurations.
>>>>>>>
>>>>>>> I am having trouble using an XPath splitter because of the issue with
>>>>>>> making namespaces visible to the XPath processor.
>>>>>>>
>>>>>>> I've seen from here
>>>>>>> (http://camel.465427.n5.nabble.com/fail-filter-XPATH-camel-td476424.html)
>>>>>>> that if the route is defined within a camel context, then you can make
>>>>>>> the namespace visible in the usual way, as a xmlns declaration in the
>>>>>>> root (context) element.
>>>>>>>
>>>>>>> But this doesn't seem to work if I am loading just a route into an
>>>>>>> existing context.
>>>>>>>
>>>>>>> <route xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>>>>>>> xmlns="http://camel.apache.org/schema/spring";
>>>>>>> xmlns:d="http://dhis2.org/schema/dxf/2.0";
>>>>>>> id="dataUpdater">
>>>>>>>
>>>>>>> <description>Import Metadata</description>
>>>>>>> <!-- every now and again ... -->
>>>>>>> <from
>>>>>>> uri="quartz://halfminute?trigger.repeatInterval=300000&trigger.repeatCount=10"/>
>>>>>>> <to
>>>>>>> uri="http://localhost/trunk/api/metaData.xml?"/>
>>>>>>> <split>
>>>>>>> <xpath>/d:/dxf2/d:organisationUnit</xpath>
>>>>>>> <to .... />
>>>>>>> </split>
>>>>>>>
>>>>>>> Camel complains that the xpath expression is illegal. Has anyone come
>>>>>>> across (and maybe solved) this problem before?
>>>>>>>
>>>>>>> I've had a look at the tokenize xml approach, which seems nice (and
>>>>>>> efficient) but again it doesn't seem to handle namespaces.
>>>>>>>
>>>>>>> Any advice welcome.
>>>>>>>
>>>>>>> Regards
>>>>>>> Bob
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Claus Ibsen
>>>>>> -----------------
>>>>>> CamelOne 2012 Conference, May 15-16, 2012: http://camelone.com
>>>>>> FuseSource
>>>>>> Email: cib...@fusesource.com
>>>>>> Web: http://fusesource.com
>>>>>> Twitter: davsclaus, fusenews
>>>>>> Blog: http://davsclaus.blogspot.com/
>>>>>> Author of Camel in Action: http://www.manning.com/ibsen/
>>>>
>>>>
>>>>
>>>> --
>>>> Claus Ibsen
>>>> -----------------
>>>> CamelOne 2012 Conference, May 15-16, 2012: http://camelone.com
>>>> FuseSource
>>>> Email: cib...@fusesource.com
>>>> Web: http://fusesource.com
>>>> Twitter: davsclaus, fusenews
>>>> Blog: http://davsclaus.blogspot.com/
>>>> Author of Camel in Action: http://www.manning.com/ibsen/
>>
>>
>>
>> --
>> Claus Ibsen
>> -----------------
>> CamelOne 2012 Conference, May 15-16, 2012: http://camelone.com
>> FuseSource
>> Email: cib...@fusesource.com
>> Web: http://fusesource.com
>> Twitter: davsclaus, fusenews
>> Blog: http://davsclaus.blogspot.com/
>> Author of Camel in Action: http://www.manning.com/ibsen/
--
Claus Ibsen
-----------------
CamelOne 2012 Conference, May 15-16, 2012: http://camelone.com
FuseSource
Email: cib...@fusesource.com
Web: http://fusesource.com
Twitter: davsclaus, fusenews
Blog: http://davsclaus.blogspot.com/
Author of Camel in Action: http://www.manning.com/ibsen/
