2009年PacktPub：Apache CXF Web服务开发指南

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《PacktPub Apache CXF Web Service Development (December 2009)》是一本由Naveen Balani和Rajeev Hathi编著的专业书籍，专为学习Apache CXF Web服务开发提供深入指南。该书是英文版，针对SOAP（简单对象访问协议）和RESTful（Representational State Transfer，表述性状态转移）Web服务的开发和部署进行详尽讲解。书中内容覆盖了从基础知识到实战应用的全方位指导，适合对Apache CXF技术感兴趣的开发者阅读。本书由Packt Publishing出版，版权所有，未经许可，任何形式的复制、存储或传输都需获得书面授权，除非在批判性文章或评论中引用短小片段。尽管作者和出版社尽力确保信息的准确性，但书中提供的内容不带有任何形式的保修，也不承担因本书直接或间接造成的任何损害的责任。《Apache CXF Web Service Development》出版于2009年12月，具有一定的历史背景，但它所涵盖的技术在当时应该是先进的，并且对于了解当时的CXF框架有着重要的参考价值。生产参考编号1111表明了该书的版本和制作信息。在学习过程中，读者可以期待掌握以下关键知识点： 1. **Apache CXF介绍**：了解Apache CXF的背景、核心概念以及它在企业级Web服务架构中的角色。 2. **SOAP服务开发**：学习如何设计、创建和部署基于SOAP的接口，包括XML消息处理、WSDL（Web服务描述语言）和WS-Security等。 3. **RESTful服务设计**：掌握RESTful原则，如URL设计、HTTP方法（GET、POST等）、状态管理等，以及如何在CXF中实现这些原则。 4. **服务端实现**：学习如何使用Java编写服务端代码，包括契约绑定、JAX-RS（Java API for RESTful Web Services）和WS-BPEL（Business Process Execution Language）等技术。 5. **客户端集成**：了解如何通过CXF客户端库与服务进行交互，包括客户端配置、调用处理和错误处理等。 6. **部署与管理**：包括配置Apache服务器、设置负载均衡和安全措施，以及监控和调试Web服务性能。 7. **实践项目**：书中可能包含几个实际项目的案例研究，帮助读者将理论知识转化为实践经验。 8. **最新趋势和最佳实践**：考虑到出版日期，书中可能介绍了当时CXF框架的热门特性和当时的最佳开发实践，对于了解早期CXF生态和技术演进具有参考价值。《PacktPub Apache CXF Web Service Development (December 2009)》是一本非常有价值的资源，对于想要深入理解和应用Apache CXF的软件开发人员来说，无论是在当时还是现在，都是一个不可或缺的学习工具。

Preface

[ 4 ]

• Apache Ant 1.7.1 or higher. Ant will be used to build and deploy the code.

The build utility can be downloaded from the site: http://ant.apache.

org/bindownload.cgi

• CXF binary distribution 2.2.3 or latest. CXF binary distribution can be

downloaded from the site: http://cxf.apache.org/download.html.

• Maven 2.x or higher, if you plan to use Maven instead of ANT for

running the code examples. Maven can be downloaded from the

site http://maven.apache.org/

Refer to Appendix A for more details on how to set up the environment for running

the code examples,

Who this book is for

This book is for developers who want to design and develop SOAP and RESTful

services using Apache CXF framework, and leverage various CXF features for

service development. It is ideal for developers who have some experience in Java

application development as well as some basic knowledge of web services, but

it covers some of the basic fundamentals of web services and REST to get you

acquainted with these technologies before using these concepts to develop services

using the CXF framework.

Conventions

In this book, you will nd a number of styles of text that distinguish between

different kinds of information. Here are some examples of these styles, and an

explanation of their meaning.

Code words in text are shown as follows: " You need to specify the <http:address>

element for sending messages in an HTTP format. "

A block of code is set as follows:

import javax.jws.WebService;

@WebService

public interface OrderProcess {

String processOrder(Order order);

}

This material is copyright and is licensed for the sole use by ALESSANDRO CAROLLO on 18th December 2009

6393 south jamaica court, , englewood, , 80111

Getting Familiar with CXF

We often require real world systems and applications to integrate with each other.

Application integration is one of the critical areas that you need to focus on during

application development, if your application involves integrating with third party or

external systems. Alternatively, depending on your requirements, you may want other

systems to access your application. Let's take an example of a credit card company

providing services to guarantee payments made by consumers. These services are

available over the Web, and consumers or applications, such as an online shopping

application, or an airline rm that accepts credit cards as payment for its services,

uses the credit card payment service for a consumer's payments. Since the credit

card services can be accessed by any application client such as a web browser or a

WAP (Wireless Application Protocol) enabled phone, and developed using any

programming language, there is a need for a standard-based communication where

the services offered can be used by any application, irrespective of any underlying

technology. This is where web services come into play, and to simplify the design

and development of web services, you have the option of using various web service

frameworks. Apache CXF is one such leading standard-based web services framework

whose goal is to simplify web services development.

In order to get started with the CXF framework, you rst need to understand the

concepts behind web services, the technology, and the standards that make up web

service and features provided by the CFX framework. This chapter will cover these

core concepts.

Specically, in this chapter we will cover the following topics:

• The core technology standards and concepts behind web services

• Approaches for web services development

• Overview of Apache CXF framework

• Features provided by Apache CXF framework

• Setting up Apache CFX environment

This material is copyright and is licensed for the sole use by ALESSANDRO CAROLLO on 18th December 2009

6393 south jamaica court, , englewood, , 80111

Getting Familiar with CXF

[ 8 ]

Web service technology standards

Before you look at the concept behind web services you need to understand the

core technology standards that make up web services. Covering all the concepts

and standards associated with web services is a vast topic in itself. In this chapter

we attempt to cover the relevant web service standards and information used in the

context of this book to get you acquainted with the technologies for developing web

services using CXF. Some of the concepts will be explained in greater detail during

the course of this book.

XML

XML stands for Extensible Markup Language. XML is a markup language that

species or describes the format of the data to be exchanged between two parties.

The data is signicantly structured as tags or elements in a hierarchical order. A user

can create his/her own tag to represent structured information. XML has become

the de facto standard for representing structured information. Some of the important

standard technologies associated with an XML document are listed below:

• XML namespace—an XML namespace is a standard for providing uniquely

named elements and attributes in an XML document. The XML namespace

concept is similar to package denitions in Java, which provide conict

resolution of class names based on package declarations. A namespace is

declared using the reserved XML attribute xmlns, the value of which must

be a URI (Uniform Resource Identier) reference, for example,

xmlns=http://www.w3.org/1999/xhtml or using a prex

xmlns:xhtml=http://www.w3.org/1999/xhtml.

• XML schema—XML schema provides a means of dening the structure,

content, and semantics of XML documents. The XML Schema data model

includes the vocabulary (element and attribute names), the content model

(relationships and structure), and data types. An example of XML Schema

describing address information is provided below:

<xs:schema

xmlns:xs="http://www.w3.org/2001/XMLSchema">

<xs:element name="address" type="Address"/>

<xs:complexType name="Address">

<xs:sequence>

<xs:element name="addressLine1" type="xs:string"/>

<xs:element name="addressLine2" type="xs:string"/>

<xs:element name="city" type="xs:string"/>

<xs:element name="state" type="xs:string"/>

<xs:element name="country" type="xs:string"/>

This material is copyright and is licensed for the sole use by ALESSANDRO CAROLLO on 18th December 2009

6393 south jamaica court, , englewood, , 80111

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