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When I got a break, I checked out Spring web services which uses the conract first approach.
Contract first web service approach is an industry standard best practice when developing web services.
Create a log4j.properties file under the src folder with the following contents. log4Logger=WARN, stdout log4j.springframework.ws=DEBUG log4j.springframework.xml=DEBUG log4j.appender.stdout=org.apache.log4j. Console Appender log4j.appender.stdout.layout=org.apache.log4j. Person Response [id=2, first Name=Bruce, last Name=Wayne] Batman is not authorized Get person with id=2...
This tutorial demonstrates how to develop a web service with Spring WS.
It will show you how to create a web service from contract to security. The domain can be processed with methods like, Add Person, Get Person, Get All Persons, Update Person, and Delete Person.
It uses JAXB2 un/marshalling and WSS4j for security. The web service can only be accessed by authorized users. A soap fault becomes a response when somethings wrong with the operation such as missing Id, person not found from the server. Here’s where we start our contract first approach, the data contract.
But first some words about the contract first part.
The ones I’ve used were Metro web services and Apache CXF. It was so easy to use that you simply use annotations, deploy it to a web server, then … There goes the xml schema and the wsdl generated on the fly. It too works very well with a client generated by wsimport from the command line.For our simple example, I personally like doing it by hand.Here’s a good tutorial for writing xml schema by hand We’ll use this xml file later on the project setup.This is a different approach than for example CXF that generates an interface your implementation must implement.
The server implementation only has dependencies to the JAXB generated request and response classes. The implementation class must have the Spring @Endpoint annotation above the class name and the @Payload Root annotation above the method that will handle the web service request.The example uses the following libraries: Spring 2.5.6 Spring WS 1.5.9 jdk6 runtime The ide used was Eclipse 3.5.1 with springide pluggin. Unauthorized users cannot perfrom any of the service operation. The wsdl contract can be happily generated by Spring’s Default Wsdl11Definition later.