Seminario Sobre Servicios Web

Developing Web Services with Java™ Technology Module 1

Introduction to Web Services

Objectives
On completion of this module, you should:
• Explore the need for web services • Define a web service and describe the motivation

behind developing and using web services in business software
• Describe the characteristics of a web service • Describe the two major approaches to developing

webservices
• Describe the advantages of developing web

services within a JavaEE container.
DWS-4050 – Developing Web Services with Java™ Technology
Copyright 2010 Sun Microsystems, Inc. All Rights Reserved. Revision A.0

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Introduction to Web Services 1 - 1

Web services are an emerging technology that: Services Web

Exploring the Need for Web Services

Web Incorporates and buildsupon existing standards • services introduce a suite of specifications and APIs Introduces a new suite of specifications andacross • for communicating between applications APIs for communicating between applications across the the Internet. Internet
Locate and access Internet Data or Application Functionality Standard Internet and XML-based protocols

Client

Developing Java™ Web Services
Copyright2006 Sun Microsystems, Inc. All Rights Reserved. Sun Services, Revision A.2
DWS-4050 – Developing Web Services with Java™ Technology
Copyright 2010 Sun Microsystems, Inc. All Rights Reserved. Revision A.0

Module 1, slide 5 of 43
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Introduction to Web Services 1 - 2

Sun Services Conceptual Model

Conceptual Model
Browser

Application Server

Web Service InfrastructureApplication Functions

Swing Client Other Client Types Heterogeneous Client Base
DWS-4050 – Developing Web Services with Java™ Technology
Copyright 2010 Sun Microsystems, Inc. All Rights Reserved. Revision A.0

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Introduction to Web Services 1 - 3

Sun Services

Exposing Business Logic asas a Web Exposing Application Functions Web Service Services
Parts Wholesaler Parts RetailerOEM Internet Inquiry Service Order Service Inventory Database

Delivery Service

DWS-4050 – Developing Web Services with Java™ Technology Developing Java™ Web Services
Copyright 2010 Sun Microsystems, Inc. All Rights Reserved. Revision A.0

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Introduction to Web Services 1 - 4

Characteristics of Web Services
• Loosely coupled •Self-describing • Published, located, and accessed over the Internet • Interoperable • Language and platform neutral • Standards based (Internet- and XML-based

protocols)

DWS-4050 – Developing Web Services with Java™ Technology
Copyright 2010 Sun Microsystems, Inc. All Rights Reserved. Revision A.0

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Introduction to Web Services 1 - 5

Web Services vs Other Protocols
TraditionalRPC Web Service

• Within enterprise • Tied to programming
languages

• • • • • • •

Public Programming language independent Message driven Variable transports Loosely coupled Firewall friendly Inefficient

• • • • •

Procedural Specific transport Tightly coupled Firewall unfriendly Efficient

DWS-4050 – Developing Web Services with Java™ Technology
Copyright 2010 Sun Microsystems, Inc. All RightsReserved. Revision A.0

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Introduction to Web Services 1 - 6

Web Service Elements
Internet transport protocol

Sun Services

Web Service Elements
XML-based messages

(SOAP) (HTTP, HTTPS) Client Service

Service Registry (ebXML, UDDI)

Developing Java™ Web Services DWS-4050 – Developing Web Services with Java™ Technology Copyright 2010 Sun Microsystems,2006 Sun Microsystems,Inc. All Rights Reserved. Sun Services, Revision A.2 Copyright Inc. All Rights Reserved. Revision A.0

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Introduction to Web Services 1 - 7

Web Service Life Cycle Sun Services
Web Service Life Cycle
Web Service Provider 1 Create, assemble, and deploy Service Description Description interface location 2 Publish Web Service Registry...