Spring Integration inbound webservices wsdl generation - web-services

Question

I am trying to evaluate Spring Integration specially interested in exposing a simple POJO based service into a SOAP based webservice via service activator. Currently I am stuck & have issue generating dynamic wsdl. The WSDL is not loaded & browser shows 404 error.
I try to access with the following url on my local
http://localhost:8080/ws-inbound-gateway/echoService
http://localhost:8080/ws-inbound-gateway/echoService/echoService.wsdl
Below is the configuration
inbound-gateway-config.xml
<int:channel id="inbound" />
<bean id="marshaller" class="org.springframework.oxm.jaxb.Jaxb2Marshaller">
<property name="contextPath" value="com.manish.schema.generated" />
</bean>
<int-ws:inbound-gateway id="empServiceGateway"
request-channel="inbound" marshaller="marshaller"
unmarshaller="marshaller" />
<int:service-activator input-channel="inbound"
requires-reply="true" ref="employeeServiceActivator" method="getEmployeeDetails">
</int:service-activator>
<bean id="employeeServiceActivator"
class="org.springframework.integration.samples.ws.EmployeeServiceResponder" />
<bean id="employeeService" class="com.manish.service.EmployeeService" />
EmployeeService is just a pojo class while EmployeeServiceResponder is a service activator that invokes method on a service class.
For dynamic wsdl generation
spring-ws-config.xml
<import resource="classpath:/META-INF/spring/integration/inbound-gateway-config.xml" />
<sws:dynamic-wsdl id="echoService" portTypeName="empServiceGateway" locationUri="/echoService" targetNamespace="http://manish.niyati.com/echo">
<sws:xsd location="/WEB-INF/echo.xsd"/>
</sws:dynamic-wsdl>
<bean
class="org.springframework.ws.server.endpoint.mapping.UriEndpointMapping">
<property name="defaultEndpoint" ref="empServiceGateway"></property>
</bean>
web.xml
<servlet>
<servlet-name>spring-ws</servlet-name>
<servlet-class>org.springframework.ws.transport.http.MessageDispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/spring-ws-config.xml</param-value>
</init-param>
<init-param>
<param-name>transformWsdlLocations</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring-ws</servlet-name>
<url-pattern>/echoService</url-pattern>
</servlet-mapping>
Kindly let me know what else is missing in order to make this service accessible as web-service via SI.
Also when I try to access the service from using WebService template I get the SOAPFAULT
02:18:59.436 INFO [main][org.springframework.ws.soap.saaj.SaajSoapMessageFactory] Creating SAAJ 1.3 MessageFactory with SOAP 1.1 Protocol
02:18:59.437 DEBUG [main][org.springframework.ws.soap.saaj.SaajSoapMessageFactory] Using MessageFactory class [com.sun.xml.internal.messaging.saaj.soap.ver1_1.SOAPMessageFactory1_1Impl]
02:18:59.484 DEBUG [main][org.springframework.ws.client.core.WebServiceTemplate] Opening [org.springframework.ws.transport.http.HttpUrlConnection#249fa95c] to [http://localhost:8080/ws-inbound-gateway/echoService]
02:18:59.519 TRACE [main][org.springframework.ws.soap.saaj.support.SaajUtils] SOAPElement [com.sun.xml.internal.messaging.saaj.soap.ver1_1.Envelope1_1Impl] implements SAAJ 1.3
02:18:59.535 TRACE [main][org.springframework.ws.soap.saaj.support.SaajUtils] SOAPElement [com.sun.xml.internal.messaging.saaj.soap.ver1_1.Body1_1Impl] implements SAAJ 1.3
02:18:59.562 TRACE [main][org.springframework.ws.client.MessageTracing.sent] Sent request [<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Header/><SOAP-ENV:Body><ed:employeeRequest xmlns:ed="http://manish.niyati.com/echo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <ed:empid>100</ed:empid> </ed:employeeRequest></SOAP-ENV:Body></SOAP-ENV:Envelope>]
02:18:59.604 TRACE [main][org.springframework.ws.client.MessageTracing.received] Received response [<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Header/><SOAP-ENV:Body><SOAP-ENV:Fault><faultcode>SOAP-ENV:Server</faultcode><faultstring xml:lang="en">**java.lang.NullPointerException**</faultstring></SOAP-ENV:Fault></SOAP-ENV:Body></SOAP-ENV:Envelope>] for request [<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"><SOAP-ENV:Header/><SOAP-ENV:Body><ed:employeeRequest xmlns:ed="http://manish.niyati.com/echo" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <ed:empid>100</ed:empid> </ed:employeeRequest></SOAP-ENV:Body></SOAP-ENV:Envelope>]
02:18:59.605 DEBUG [main][org.springframework.ws.client.core.WebServiceTemplate] Received Fault message for request [SaajSoapMessage {http://manish.niyati.com/echo}employeeRequest]
02:18:59.607 TRACE [main][org.springframework.ws.soap.saaj.support.SaajUtils] SOAPElement [com.sun.xml.internal.messaging.saaj.soap.ver1_1.Fault1_1Impl] implements SAAJ 1.3
Thanks in Advance
-MS

Answer 1

To get the WSDL, change the web.xml url-pattern to <url-pattern>/*</url-pattern>.
and the URL is http://localhost:8080/ws-inbound-gateway/echoService.wsdl.
Everything else looks good.
Regarding the WebServiceTemplateQuestion, what are you sending? It looks like you are using the ws sample app, which uses a WebServiceTemplate...
#Test
public void testWebServiceRequestAndResponse() {
StringResult result = new StringResult();
Source payload = new StringSource(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
"<echoRequest xmlns=\"http://www.springframework.org/spring-ws/samples/echo\">hello</echoRequest>");
template.sendSourceAndReceiveToResult(WS_URI, payload, result);
logger.info("RESULT: " + result.toString());
assertThat(result.toString(), equalTo(
"<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
"<echoResponse xmlns=\"http://www.springframework.org/spring-ws/samples/echo\">hello</echoResponse>"));
}
And that works just fine.
Looks like your NPE is on the server - take a look at the server logs to see what happened.

Answer 2

You are doing it in a much more complex way. With a simple configuration and using some basic annotations, you can develop a web service in a short time.
I have myself used Apache CXF for web service development and it is quite good for spring based configuration. You can also take a look at this blog. It has shown all the steps with figures to develop a web service with the generation of wsdl and a client to consume the web service.