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From Simon West <simonwes...@web.de>
Subject envelop null. how to invoke an axis 2 method?
Date Tue, 01 Aug 2006 16:32:44 GMT
Hello,
i build my first webservice and i got a big problem. I modified the \samples\wsdl\perf.wsdl.
I want to make a method which has no arguments an retrieves an list of strings. I generated
the classes and deployed the service. Now the problem is that i cant invoke my method. I get
this exception:

public static void main(String[] args) {
		try {
			ProductStub ps = new ProductStub();			
			ps.GetCategories();
		} catch (Exception e) {		
			e.printStackTrace();
		}
	}

produces

java.lang.NullPointerException
	at org.apache.axis2.context.MessageContext.setEnvelope(MessageContext.java:681)
	at testclient.org.apache.axis2.ProductStub.GetCategories(ProductStub.java:109)
	at testclient.ProductTest.main(ProductTest.java:14)

But i have already implemented the server side as:

public class ProductSkeleton {

	public org.example.www.product.Categories GetCategories()
	{
		Categories c = new Categories();
		c.addCategory("hello");
		c.addCategory("cya");
		return c;
	}
}

The wsdl is a little bit longer but maybe helpfull:

<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
	xmlns:tns="http://www.example.org/Product/"
	xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
	xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="Product"
	targetNamespace="http://www.example.org/Product/">
	<wsdl:types>
		<xsd:schema targetNamespace="http://www.example.org/Product/">
			<xsd:element name="Categories">
				<xsd:complexType>
					<xsd:sequence>
						<xsd:element name="Category" type="xsd:string"
							minOccurs="1" maxOccurs="unbounded">
						</xsd:element>
					</xsd:sequence>
				</xsd:complexType>
			</xsd:element>
		</xsd:schema>
	</wsdl:types>
	<wsdl:message name="GetCategoriesResponse">
		<wsdl:part element="tns:Categories"
			name="GetCategoriesResponse" />
	</wsdl:message>
	<wsdl:portType name="Product">
		<wsdl:operation name="GetCategories">
			<wsdl:input message="tns:GetCategoriesRequest" />
			<wsdl:output message="tns:GetCategoriesResponse" />
		</wsdl:operation>
	</wsdl:portType>
	<wsdl:binding name="ProductSOAP" type="tns:Product">
		<soap:binding style="document"
			transport="http://schemas.xmlsoap.org/soap/http" />
		<wsdl:operation name="GetCategories">
			<soap:operation
				soapAction="http://www.example.org/Product/GetCategories" />
			<wsdl:input>
				<soap:body parts="GetCategoriesRequest" use="literal" />
			</wsdl:input>
			<wsdl:output>
				<soap:body parts="GetCategoriesResponse" use="literal" />
			</wsdl:output>
		</wsdl:operation>
	</wsdl:binding>
	<wsdl:service name="Product">
		<wsdl:port binding="tns:ProductSOAP" name="ProductSOAP">
			<soap:address location="http://www.example.org/" />
		</wsdl:port>
	</wsdl:service>
</wsdl:definitions>

Maybe someone can help me how to invoke this method?

Best regards
Simon
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