Read e-book online Java Web Services: Up and Running: A quick, practical, and PDF

By Martin Kalin

ISBN-10: 059652112X

ISBN-13: 9780596521127

This example-driven e-book deals a radical creation to Java's APIs for XML net prone (JAX-WS) and RESTful internet companies (JAX-RS). Java internet companies: Up and operating takes a transparent, pragmatic method of those applied sciences via supplying a mixture of architectural evaluation, entire operating code examples, and brief but designated directions for compiling, deploying, and executing an software. you will the way to write net providers from scratch and combine present companies into your Java purposes.

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Additional info for Java Web Services: Up and Running: A quick, practical, and thorough introduction

Sample text

Here, then, are the steps required to get the web service deployed and a sample client written quickly: 1. The source files are compiled in the usual way. players = players; } List getPlayers() { return players; } void setRosterCount(int n) { } // no-op but needed for property int getRosterCount() { return (players == null) ? publish(url, new Teams()); } } 2. In the working directory, invoke the wsgen utility, which comes with core Java 6: % wsgen -cp . publish to generate the service’s WSDL.

GetNickname()); } } } When the client executes, the output is: Team name: Abbott and Costello (roster count: 2) Player: Bud Player: Lou Team name: Marx Brothers (roster count: 3) Player: Chico Player: Groucho Player: Harpo Team name: Burns and Allen (roster count: 2) Player: George Player: Gracie This example hints at what is possible in a commercial-grade, SOAP-based web service. Programmer-defined types such as Player and Team, along with arbitrary collections of these, can be arguments passed to or values returned from a web service so long as certain guidelines are followed.

Service contract The service client requires information about the service’s operations in order to invoke them. In particular, the client needs information about the invocation syntax: the operation’s name, the order and types of the arguments passed to the operation, and the type of the returned value. The client also requires the service endpoint, typically the service URL. The WSDL document provides these pieces of information and others. Although a client could invoke a service without first accessing the WSDL, this would make things harder than they need to be.

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Java Web Services: Up and Running: A quick, practical, and thorough introduction by Martin Kalin

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