Oracle 9iAS Web Services

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Oracle 9i Application Server Its Support for Web
Services
Prepared for IT620 February 10 , 2003
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Talk Outline

• Overview
• Java Related APIs for Web Services
• Oracles Web Services Infrastructure
• Pointers to More Information

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Overview

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What is a Web Service?

• A set of messaging protocols, programming
  standards,
• and network registration and discovery facilities
  that
• expose business functions to authorized parties
  over
• the internet from any Web-connected device.

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What is a Web Service?

• Specifically
• Exposes and describes itself A web service
  defines its functionality and attributes
• Allows other services to locate it on the Web A
  web service can be registered in a electronic
  yellow pages so applications can easily locate
  it
• Can be invoked using an Internet standard
  protocol
• Returns a response to requesting application over
  the same Internet standard protocol

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Two types of Web Services

• Simple Provides basic request/response styleWeb
  services using HTTPS for security developed
  using SOAP, WSDL, and UDDI
• Complex Multi-party, long-running business
  conversations that involve sophisticated
  security such as non-repudiation via digital
  signatures, as well as business-to-business
  collaboration and business process management.
  They support two standards ebXML and RosettaNet.

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Electronic Business XML (ebXML)

• ebXML is a modular suite of specifications that
  enables enterprises of any size and in any
  geographical location to conduct business over
  the Internet.
• standardizes
• exchanging business messages
• conducting trading relationships
• communicating data in common terms
• defining and registering business processes.

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RosettaNet

• RosettaNet is a consortium of more than 400 the
  world's leading
• Electronic Components (EC), Information
  Technology (IT) and
• SemiconductorManufacturing (SM) companies working
  to
• create, implement and promote open e-business
  process
• standards.
• Provides dynamic, flexible trading networks
  operational efficiency and new business
  opportunities

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Oracles Strategy for Web Services

• Provide developers with a comprehensive platform
  to develop, deploy, and manage both simple and
  complex Web Services.
• Supports Open standards
• Simplified Development by unifying J2EE and the
  web service programming model

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Benefits of using J2EE

• Developer Simplicity Developers only need to
  learn J2EE programming concepts
• Business Logic Reuse Can publish J2EE
  applications as web services without any change
  to the application
• Common Runtime Environment Shared between J2EE
  applications and web services

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Oracles Strategy for Web Services

• The support is provided via
• Oracle 9i Application Server (Oracle 9iAS)
• Oracle 9i Jdeveloper
• Oracle 11i e-business Suite

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Oracle 9i Application Server (Oracle 9iAS)

• Develop Web Services using Java/J2EE
• Aggregate Web Services into an Enterprise Portal
• Enable Access to Web Services from any fixed or
  wireless device

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Oracle 9i JDeveloper

• Oracle9i JDeveloper is a J2EE and XML
  development environment with end-to-end support
  for developing, debugging, and deploying business
  applications and Web services.
• Seamlessly integrated with Oracle 9i Application
  Server to allow Web Services to be efficiently
  developed and deployed

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Oracle 11i e-Business Suite

• Enterprise Applications are enabled to support
  Web Services

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Java related APIs for Web Services

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Implementing Enterprises Web Services (JSR 109)

• Defines how web services are implemented in the
  J2EE
• platform. It provides a programming and run-time
  model
• based on
• XML Messaging (JAXM)
• XML Registries (JAXR)
• XML-based RPC (JAXRPC)

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Java API for XML Messaging (JAXM)

• Responsible for packaging a business message as
  an XML document. Two elements
• A low-level JAVA API for constructing, routing,
  and delivering XML documents using the SOAP 1.1
  protocol with attachments
• A higher-level API for standards such as ebXML
  and RosettaNet.

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Java API for XML Registries (JAXR)

• APIs to access and search UDDI registries

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Java API for XML-based RPC (JAXRPC)

• Marshaling and Un-Marshaling The APIs permit
  development of portable stubs and skeletons.
• A stub is a piece of code that runs on a client
  and maps a language call into a network call.
• A skeleton is an analogous piece of code that
  runs on a server and maps an incoming network
  call to a language-level call on the server.
• Forward Mapping APIs and conventions for mapping
  XML-based RPC call definitions into Java
  interfaces, classes, and methods. Allows
  interfaces defined in other languages to be
  mapped to Java.
• Reverse Mapping Reverse of the above.

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Oracle 9iAS Web Service Infrastructure

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Web Service Infrastructure Components

• SOAP Message Processor
• WSDL Stub and Skeleton Generation Utilities
• UDDI Registry
• Web Services Run-time Environment

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SOAP Message Processor

• Runs as a servlet on Oracle 9iAS J2EE
  container.
• Decode SOAP requests
• Encode SOAP Message and deliver over HTTP/SMTP
• Support for state-full request/response web
  service via cookies and sessions.

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WSDL Stub and Skeleton Generation Utilities

• Supports automatic generation of WSDL 1.0 based
  Stubs and Skeletons
• JAXB (Java API for XML Binding) compliant
• Integrated with JDeveloper

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UDDI Registry

• A four level hierarchical XML schema for
  publishing Web Services
• Business Entity name, industry, product
  category, geographical location, etc.
• Business Service groups a set of related Web
  Services together
• Binding Information Information relevant to
  application program such as URL
• Compliance Information Additional information as
  format information, protocols, type of security,
  etc.

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UDDI Registry

• Two sets of APIs
• Inquiry APIs for searching
• Publication APIs for publishing Web services in
  the UDDI registry
• UDDI implemented using Oracle RDBMS
• Fast, Highly Reliable and Available
• Secure Provides controlled access
• Can be browsed from IBM and Microsoft UDDI
  registry browsers

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Web Services Run Time Environment

• Web Services are implemented in Java conforming
  to J2EE standard
• Stateless or Stateful
• Implemented as Java Classes or Enterprise Java
  Beans

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Web Services Run Time Environment

• Web Services can leverage the set of services
  offered by Oracle 9iAS J2EE container
• Transaction management
• Messaging
• Security
• Resource Pooling
• Naming/Directory

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For more Information

• Main Page http//otn.oracle.com/tech/webservices/c
  ontent.html
• http//otn.oracle.com/docs/products/ias/doc_librar
  y/90200doc_otn/core.902/q20101/net2_01.htm
• ebXML http//www.ebxml.org
• RosettaNet http//www.rosettanet.org

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