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From "indika priyantha kumara (JIRA)" <j...@apache.org>
Subject [jira] Commented: (SYNAPSE-503) get-property function is not recognized in xquery variable expression attribute
Date Mon, 16 Feb 2009 08:56:59 GMT

    [ https://issues.apache.org/jira/browse/SYNAPSE-503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12673825#action_12673825
] 

indika priyantha kumara commented on SYNAPSE-503:
-------------------------------------------------

I have updated the XQuery mediator to use SynapseXPath. 

But , I didn't check your scenario .. I will check 

> get-property function is not recognized in xquery variable expression attribute
> -------------------------------------------------------------------------------
>
>                 Key: SYNAPSE-503
>                 URL: https://issues.apache.org/jira/browse/SYNAPSE-503
>             Project: Synapse
>          Issue Type: Bug
>          Components: Extension Mediators
>    Affects Versions: 1.3
>            Reporter: Michal Stochmialek
>             Fix For: 1.3
>
>
> I'm transforming response of the remote service in outSequence of a proxy.
> I'm using xquery mediator. I want to change the format of the payload of the response

> and also I want to insert a payload of the request into a first element of the response.
> To do that, I'm storing the request A payload in a variable in inSequence and in outSequence

> I'm want to use it in XQUERY mediator while transforming the response.
> 1. proxy: gets request A,
> 2. inSequence: stores the payload A in a property named "body" (it will be used in outSeqence),
> 2. inSequence: transforms request A to request B,
> 3. endpoint: sends request B to remote service,
> 4. endpoint: receives response B,
> 5. outSequence: transforms response B to response A with request A included.
> Here's a fragments of the synapse.xml:
> Storing the payload contents in the "body" property:
> <property name="body" expression="$body/child::*[position()=1]" />
> Transforming response to other format and passing request payload as a argument:
> <xquery key="response.xq" trace="enable">
>     <variable name="payload" type="ELEMENT"/> 
>     <variable name="request" expression="synapse:get-property('body')" type="ELEMENT"/>
> </xquery>
> On the runtime I've got following exception:
> 2009-02-13 20:42:07,359 [192.168.168.6-5MBTB3J] [HttpClientWorker-2] ERROR XQueryMediator
Unable to execute the query 
> org.apache.synapse.SynapseException: Error evaluating XPath synapse:get-property('body')
on message<?xml version='1.0' encoding='utf-8'?><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:wsa="http://schemas.xmlsoap.org/ws/2004/03/addressing" xmlns:kom="http://www.eurobank.pl/serwisy/paybylink/1.0/komunikaty"><soapenv:Header>
> [...header contents...]</soapenv:Header>[... payload contents...]
>    </soapenv:Body></soapenv:Envelope>
> 	at org.apache.synapse.mediators.xquery.MediatorCustomVariable.handleException(MediatorCustomVariable.java:165)
> 	at org.apache.synapse.mediators.xquery.MediatorCustomVariable.evaluate(MediatorCustomVariable.java:153)
> 	at org.apache.synapse.mediators.xquery.MediatorCustomVariable.evaluateValue(MediatorCustomVariable.java:93)
> 	at org.apache.synapse.mediators.xquery.XQueryMediator.performQuery(XQueryMediator.java:312)
> 	at org.apache.synapse.mediators.xquery.XQueryMediator.mediate(XQueryMediator.java:160)
> 	at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:61)
> 	at org.apache.synapse.config.xml.AnonymousListMediator.mediate(AnonymousListMediator.java:30)
> 	at org.apache.synapse.config.xml.SwitchCase.mediate(SwitchCase.java:65)
> 	at org.apache.synapse.mediators.filters.SwitchMediator.mediate(SwitchMediator.java:111)
> 	at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:61)
> 	at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:111)
> 	at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:140)
> 	at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:312)
> 	at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:133)
> 	at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:173)
> 	at org.apache.synapse.transport.nhttp.ClientWorker.run(ClientWorker.java:210)
> 	at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:58)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> 	at java.lang.Thread.run(Thread.java:619)
> 2009-02-13 20:42:07,359 [192.168.168.6-5MBTB3J] [HttpClientWorker-2] ERROR SynapseCallbackReceiver
Synapse encountered an exception, No error handlers found - [Message Dropped]
> Unable to execute the query 
> After looking a bit at XQueryMediator code it seems it uses AXIOMXPath class instead
of SynapseXPath class.
> This seems to be a reason of the exception. 
> I also tried to used XSLT mediator with similar parameters (see below) and the property
is set correctly,
> ( XSLTMediator uses SynapseXPath class for evaluating values of properties).
> <xslt key="response.xsl">
>       <property name="requestBody" expression="get-property('body')"/>
> </xslt>

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