Learn how to develop REST-style and SOAP-based web services and clients with this quick and thorough introduction. This hands-on book delivers a clear, pragmatic approach to web services by providing an architectural overview, complete working code examples, and short yet precise instructions for compiling, deploying, and executing them. You'll learn how to write services from scratch and integrate existing services into your Java applications. With greater emphasis on REST-style services, this second edition covers Http Servlet, Restlet, and JAX- RS APIs; j Query clients against REST-style services; and JAX- WS for SOAP-based services. Code samples include an Apache Ant script that compiles, packages, and deploys web services.
Learn how to develop REST-style and SOAP-based web services and clients with this quick and thorough introduction. This hands-on book delivers a clear, pragmatic approach to web services by providing an architectural overview, complete working code examples, and short yet precise instructions for compiling, deploying, and executing them. You’ll learn how to write services from scratch and integrate existing services into your Java applications. JAX- WS has two distinct but related APIs for SOAP-based web services. One API, with annotations such as @ Web Service and @ Web Method, focuses on what might be called the application level. On the service side, annotations are used to create web services and to specify their operations. Additional annotations such as @ Web Param are available for fine-tuning and documenting different aspects of a service and its operations. On the client side, the application API enables clients to draw upon wsimport-generated classes to access a SOAP-based service and to invoke its operations. A central feature of the application level is the WSDL contract, which captures in XML the service and its operations, including essential details such as the invocation syntax for the service operations, the encoding/decoding scheme for data types, the transport used for messages, and the service endpoint. Frameworks such as JAX- WS and Dot Net come with utilities that put the WSDL to practical use. A major appeal of the application level in JAX- WS is that the SOAP itself—the XML—remains hidden on the service and the client sides. The underlying SOAP libraries serialize from Java into XML and deserialize from XML into Java, thereby allowing both service and service client to work in Java data structures and in familiar Java programming idioms. JAX- B and related utilities allow REST-style services in Java to work around the XML or JSON payloads typical of.
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