Problem with query expressions when assigning from variable to variable
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Key: ODE-581
URL: https://issues.apache.org/jira/browse/ODE-581
Project: ODE
Issue Type: Bug
Components: BPEL Compilation/Parsing, BPEL Runtime
Affects Versions: 1.2
Environment: The attached test process is intended to be run against
Ode 1.X. I have also seen this behavior on Ode 1.2, but it manifests itself
differently.
Reporter: Jon Coogan
Attachments: deploy.xml, QueryTest1.bpel, QueryTest1.wsdl
I have noticed that in some instances, when using a query expression to copy
data from one variable to another, the Ode runtime will throw a
selectionFailure fault. Replacing the variable query with an expression
resolves the problem.
I have put together a simple example of the problem I am seeing with query
expressions. I tested this against a current build of Ode 1.X.
The attached process takes a single int as input and returns a single string as
output. Valid arguments for the input are 1, 2, or 3. The process should
return "one", "two", or "three", depending on the input.
The problem occurs when I try to assign values out of the RecordSet variable
into the Record variable. When I use a query on the "to" side of the copy, the
process will throw a selectionFailure fault at runtime. The process works
correctly if you replace the queries with expressions. There are comments in
the .bpel file that indicate where the problem occurs and how to resolve the
problem by using an expression instead of a query.
Test files follow:
********** Begin QueryTest1.wsdl **********
<?xml version="1.0"?>
<definitions name="QueryTest1"
targetNamespace="mynamespace"
xmlns:tns="mynamespace"
xmlns:plnk="http://docs.oasis-open.org/wsbpel/2.0/plnktype";
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/";
xmlns="http://schemas.xmlsoap.org/wsdl/";
>
<types>
<schema attributeFormDefault="unqualified"
elementFormDefault="qualified"
targetNamespace="mynamespace"
xmlns="http://www.w3.org/2001/XMLSchema";>
<element name="QueryTest1Request" type="int" />
<element name="QueryTest1Response" type="string" />
<complexType name="RecordType">
<sequence>
<element name="SomeValue" type="string"></element>
<element name="AnotherValue" type="string"></element>
</sequence>
</complexType>
<complexType name="RecordSetType">
<sequence>
<element ref="tns:Record" minOccurs="0"
maxOccurs="unbounded"></element>
</sequence>
</complexType>
<element name="Record" type="tns:RecordType"></element>
<element name="RecordSet" type="tns:RecordSetType"></element>
</schema>
</types>
<message name="QueryTest1RequestMessage">
<part name="payload" element="tns:QueryTest1Request"/>
</message>
<message name="QueryTest1ResponseMessage">
<part name="payload" element="tns:QueryTest1Response"/>
</message>
<portType name="QueryTest1">
<operation name="process">
<input message="tns:QueryTest1RequestMessage" />
<output message="tns:QueryTest1ResponseMessage"/>
</operation>
</portType>
<plnk:partnerLinkType name="QueryTest1">
<plnk:role name="QueryTest1Provider" portType="tns:QueryTest1"/>
</plnk:partnerLinkType>
<binding name="QueryTest1Binding" type="tns:QueryTest1">
<soap:binding style="document"
transport="http://schemas.xmlsoap.org/soap/http"; />
<operation name="process">
<soap:operation soapAction="mynamespace/process" />
<input>
<soap:body use="literal" />
</input>
<output>
<soap:body use="literal" />
</output>
</operation>
</binding>
<service name="QueryTest1Service">
<port name="QueryTest1Port" binding="tns:QueryTest1Binding">
<soap:address location="http://[server]:[port]/ode/QueryTest1"; />
</port>
</service>
</definitions>
********** End QueryTest1.wsdl **********
********** Begin QueryTest1.bpel **********
<?xml version="1.0" encoding="UTF-8"?>
<bpws:process exitOnStandardFault="yes"
expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"
name="QueryTest1"
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"
suppressJoinFailure="yes" targetNamespace="mynamespace"
xmlns:bpws="http://docs.oasis-open.org/wsbpel/2.0/process/executable";
xmlns:ode="http://www.apache.org/ode/type/extension";
xmlns:tns="mynamespace" xmlns:xs="http://www.w3.org/2001/XMLSchema";>
<bpws:import importType="http://schemas.xmlsoap.org/wsdl/";
location="QueryTest1.wsdl" namespace="mynamespace"/>
<bpws:partnerLinks>
<bpws:partnerLink myRole="QueryTest1Provider" name="client"
partnerLinkType="tns:QueryTest1"/>
</bpws:partnerLinks>
<bpws:variables>
<bpws:variable messageType="tns:QueryTest1RequestMessage" name="input"/>
<bpws:variable messageType="tns:QueryTest1ResponseMessage"
name="output"/>
<bpws:variable element="tns:RecordSet" name="RecordSet"/>
<bpws:variable element="tns:Record" name="Record"/>
</bpws:variables>
<bpws:sequence name="QueryTest1">
<bpws:receive createInstance="yes" name="ReceiveInput"
operation="process" partnerLink="client"
portType="tns:QueryTest1" variable="input"/>
<bpws:assign name="InitializeRecordSetVariable" validate="no">
<bpws:copy>
<bpws:from>
<bpws:literal>
<tns:RecordSet xmlns:tns="mynamespace"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="mynamespace QueryTest1.wsdl ">
<tns:Record>
<tns:SomeValue>one</tns:SomeValue>
<tns:AnotherValue>ONE</tns:AnotherValue>
</tns:Record>
<tns:Record>
<tns:SomeValue>two</tns:SomeValue>
<tns:AnotherValue>TWO</tns:AnotherValue>
</tns:Record>
<tns:Record>
<tns:SomeValue>three</tns:SomeValue>
<tns:AnotherValue>THREE</tns:AnotherValue>
</tns:Record>
</tns:RecordSet>
</bpws:literal>
</bpws:from>
<bpws:to variable="RecordSet"/>
</bpws:copy>
</bpws:assign>
<bpws:assign name="InitializeRecordVariable" validate="no">
<bpws:copy>
<bpws:from>
<bpws:literal>
<tns:Record xmlns:tns="mynamespace"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="mynamespace QueryTest1.wsdl ">
<tns:SomeValue/>
<tns:AnotherValue/>
</tns:Record>
</bpws:literal>
</bpws:from>
<bpws:to variable="Record"/>
</bpws:copy>
</bpws:assign>
<bpws:assign name="AssignRequestedRecordToVariable" validate="no">
<bpws:copy>
<bpws:from variable="RecordSet">
<bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[tns:Record[number($input.payload)]/tns:SomeValue]]></bpws:query>
</bpws:from>
<!------------ Selection failure. ------------>
<bpws:to variable="Record">
<bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[tns:SomeValue]]></bpws:query>
</bpws:to>
<!------------ This works. ------------>
<!-- <bpws:to
expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[$Record/tns:SomeValue]]></bpws:to>
-->
</bpws:copy>
<bpws:copy>
<bpws:from variable="RecordSet">
<bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[tns:Record[number($input.payload)]/tns:AnotherValue]]></bpws:query>
</bpws:from>
<!------------ Selection failure. ------------>
<bpws:to variable="Record">
<bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[tns:AnotherValue]]></bpws:query>
</bpws:to>
<!------------ This works. ------------>
<!-- <bpws:to
expressionLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[$Record/tns:AnotherValue]]></bpws:to>
-->
</bpws:copy>
</bpws:assign>
<bpws:assign name="AssignFromVariableToOutput" validate="no">
<bpws:copy>
<bpws:from variable="Record">
<bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath2.0"><![CDATA[tns:SomeValue]]></bpws:query>
</bpws:from>
<bpws:to part="payload" variable="output"/>
</bpws:copy>
</bpws:assign>
<bpws:reply name="ReplyWithOutput" operation="process"
partnerLink="client" portType="tns:QueryTest1" variable="output"/>
</bpws:sequence>
</bpws:process>
********** End QueryTest1.bpel **********
********** Begin deploy.xml **********
<?xml version="1.0" encoding="UTF-8"?>
<deploy xmlns="http://www.apache.org/ode/schemas/dd/2007/03";
xmlns:ns1="mynamespace">
<process name="ns1:QueryTest1">
<active>true</active>
<provide partnerLink="client">
<service name="ns1:QueryTest1Service" port="QueryTest1Port"/>
</provide>
</process>
</deploy>
********** End deploy.xml **********
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