Calling a WCF service from Java
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by Ian Kemp
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Published on 2010-06-10T14:06:15Z
Indexed on
2010/06/10
14:23 UTC
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As the title says, I need to get some Java 1.5 code to call a WCF web service. I've downloaded and used Metro to generate Java proxy classes, but they aren't generating what I expect, and I believe this is because of the WSDL that the WCF service generates.
My WCF classes look like this (full code omitted for brevity):
public class TestService : IService
{
public TestResponse DoTest(TestRequest request)
{
TestResponse response = new TestResponse();
// actual testing code...
response.Result = ResponseResult.Success;
return response;
}
}
public class TestResponse : ResponseMessage
{
public bool TestSucceeded { get; set; }
}
public class ResponseMessage
{
public ResponseResult Result { get; set; }
public string ResponseDesc { get; set; }
public Guid ErrorIdentifier { get; set; }
}
public enum ResponseResult
{
Success,
Error,
Empty,
}
and the resulting WSDL (when I browse to http://localhost/TestService?wsdl=wsdl0) looks like this:
<xsd:element name="TestResponse">
<xsd:complexType>
<xsd:sequence>
<xsd:element minOccurs="0" name="TestSucceeded" type="xsd:boolean" />
</xsd:sequence>
</xsd:complexType>
</xsd:element>
<xsd:element name="ErrorIdentifier" type="q1:guid" xmlns:q1="http://schemas.microsoft.com/2003/10/Serialization/" />
<xsd:simpleType name="ResponseResult">
<xsd:restriction base="xsd:string">
<xsd:enumeration value="Error" />
<xsd:enumeration value="Success" />
<xsd:enumeration value="EmptyResult" />
</xsd:restriction>
</xsd:simpleType>
<xsd:element name="ResponseResult" nillable="true" type="tns:ResponseResult" />
<xsd:element name="Result" type="tns:ResponseResult" />
<xsd:element name="ResultDesc" nillable="true" type="xsd:string" />
...
<xs:element name="guid" nillable="true" type="tns:guid" />
<xs:simpleType name="guid">
<xs:restriction base="xs:string">
<xs:pattern value="[\da-fA-F]{8}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{4}-[\da-fA-F]{12}" />
</xs:restriction>
</xs:simpleType>
Immediately I see an issue with this WSDL: TestResponse
does not contain the properties inherited from ResponseMessage
. Since this service has always worked in Visual Studio I've never questioned this before, but maybe that could be causing my problem?
Anyhow, when I run Metro's wsimport.bat
on the service the following error message is generated:
[WARNING] src-resolve.4.2: Error resolving component 'q1:guid'
and the outputted Java version of TestResponse
lacks any of the properties from ResponseMessage
.
I hacked the WSDL a bit and changed ErrorIdentifier
to be typed as xsd:string
, which makes the message about resolving the GUID type go away, but I still don't get any of ResponseMessage
's properties.
Finally, I altered the WSDL to include the 3 properties from ResponseMessage
in TestResponse
, and of course the end result is that the generated .java file contains them. However, when I actually call the WCF service from Java, those 3 properties are always null
.
Any advice, apart from writing the proxy classes myself?
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