Welcome!

Recurring Revenue Authors: Liz McMillan, Yeshim Deniz, Carmen Gonzalez, Elizabeth White, Pat Romanski

Related Topics: Recurring Revenue, Microservices Expo

Recurring Revenue: Article

A Review Of Oracle Application Server 10g

For the enterprise, Oracle's Application Server 10g provides a robust option

A number of solutions exist for creating Java-based Web services from a variety of different providers. Options range from individual processing engines that plug into existing application servers to large enterprise-class platforms in which Web services is one of many components. Each option provides its own set of challenges and benefits while addressing different types of requirements. For the enterprise, Oracle's Application Server 10g provides a robust option.

The 10g version of the application server from Oracle provides a highly flexible and scalable Java-based Web services capability. The tools provided by the system allow for almost any Java object or PL/SQL function to be exposed as a Web service.

Web Services Support
The Oracle Application Server Web services architecture in 10g provides the infrastructure to expose a variety of objects as Web services, including:

  • Stateless Java classes
  • Stateful Java classes
  • Stateless session EJBs
  • Stateless PL/SQL functions or procedures
  • Java Message Service (JMS) objects
Figure 1, from the application server's documentation library, identifies the supporting components for each of the above sources. The boxes on the right side of the figure represent individual servlets that handle the documents sent to and from each type of source component. For Web services that are stateful, HTTP session objects manage state between service calls. Both RPC and document-style Web services are supported by this architecture. The key difference between the two styles within the application server is the set of parameters and data types allowed in the implementing class. In the RPC style, Oracle supports instances of basic Java primitives and object types as parameters, along with Element, Document, and DocumentFragment objects from the DOM (XML API). Document-style Web service implementation classes only support instances of the Element object from the DOM (XML API).

Tools for Exposing Services
If you're using Java classes to implement Web services, the development should follow the same sound principles as when developing any other classes that will be hosted in an application server, since there are no physical limitations beyond those described in the previous section. Once the implementation classes are built, the developer must create the configuration file to describe how the service is to be assembled by the application server. This is a basic XML document not unlike a J2EE or Web application deployment descriptor. It contains information about the service itself, including name, description, and path information, as well as the individual services and their implementation classes (or other objects, depending on the implementation type). For the purposes of this article, a simple Document-style Web service was created as a standard Java class to accept an incoming document and store it in a repository.

With the configuration file complete, Oracle Application Server provides a tool called the WebServicesAssembler that reads the file information and generates the appropriate class files and deployment descriptors, and optionally the WSDL file and proxy classes for the service. This is a command-line utility that can easily be incorporated into any Ant script as part of a standardized build process. Inspection of the generated EAR file shows a Web application module with a specialized servlet for handling document-style Web services.

JMS Web services are slightly different because two JMS destinations and possibly an MDB are required, depending on implementation. In this scenario, a SOAP call goes through the following progression:

  1. The Web service client sends a SOAP message to an HTTP servlet
  2. The Web service listener servlet drops the message to a JMS destination
  3. An MDB or alternate JMS client picks up the incoming message and processes the contents
  4. The result of the operation is placed on a second JMS destination
  5. The Web service listener servlet returns the service result to the Web service client via a SOAP message
The configuration file for JMS Web services also differs in that the connection factories and queues for sending and receiving the SOAP document from the Web services listener servlet are identified instead of the implementation classes

Similar changes are needed when developing Web services that are implemented by PL/SQL objects. In this scenario, the configuration file identifies the username and password of the host database, its JDBC URL, the JNDI name of the connection pool, and the package and procedure to execute.

In addition to the Web services architecture described above, Oracle Application Server 10g provides an alternative method for Web services implementations called OracleAS SOAP. This toolkit is based on the Apache SOAP implementation. It should be noted, however, that the Oracle Application Server documentation recommends that the Oracle Application Server Web services architecture be used to create and deploy new Web services applications.

Oracle UDDI Registry
Cataloging and publishing of available Web services is supported by the UDDI registry provided in Oracle Application Server 10g. This repository includes support for the SOAP API as defined in version 2 of the UDDI specification. Web services may also be published to the UDDI registry at deployment time from the Oracle Application Server Administrative Console.

Securing Web Services in Oracle
Oracle Application Server 10g allows administrators to secure Web services using the following techniques:

  • Web services over SSL
  • HTTP Basic Authentication
  • Authorization via Oracle's implementation of JAAS
When interacting with secure Web services hosted on an Oracle Application Server instance, the client application must have the relevant system properties set. If JAAS is implemented for authorization, the username and password provided by the calling client may be used to retrieve a Principal object from the User Manager to be passed along to any relevant processes.

Conclusion
Oracle Application Server 10g provides a powerful, flexible, and scalable Web services architecture for Java-based systems. The tools provided isolate the developers from the required code to manage the details of processing SOAP requests and allow them to focus on creating business logic. The UDDI server provides the cataloging and directory services to publish available services. Overall, the 10g version of Oracle's Application Server provides a complete and robust solution for delivering Web services in Java.

Company Info
Oracle Corporation
500 Oracle Parkway
Redwood Shores, CA 94065
www.oracle.com
Phone: 1.800.ORACLE1
http://www.oracle.com/technology/products/ias/index.html

At the time of this writing, it was indicated that an upgrade to the Oracle Application Server was forthcoming with support for J2EE 1.4 Web Services, SAAJ 1.2, Apache WSIF, SOAP 1.1/1.2 and WSDL 1.1. Adds support for the WS-Security standard and provide a reliable messaging framework that supports the WS-Reliability standard. This release includes a new management console for managing Web services, a full design time in Oracle JDeveloper and for non-Oracle-IDE environments, a command line tool, and a set of Ant tasks for creating Web services. The new version is now available.

More Stories By Brian Barbash

Brian R. Barbash is the product review editor for Web Services Journal. He is a senior consultant and technical architect for Envision Consulting, a unit of IMS Health, providing management consulting and systems integration that focuses on contracting, pricing, and account management in the pharmaceutical industry.

Comments (5) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
Steve Mac 09/27/07 02:14:40 AM EDT

It’s very good article. Great site with very good look and perfect information.

Steve M. 09/14/07 05:14:12 AM EDT

Thanks, Despite the title of my original post, I think I agree with thepost.

SOA Web Services Journal News Desk 12/02/05 11:44:29 AM EST

SOA Web Services: A Review Of Oracle Application Server 10g. A number of solutions exist for creating Java-based Web services from a variety of different providers. Options range from individual processing engines that plug into existing application servers to large enterprise-class platforms in which Web services is one of many components. Each option provides its own set of challenges and benefits while addressing different types of requirements.

SOA Web Services Journal News Desk 10/29/05 05:47:02 PM EDT

A number of solutions exist for creating Java-based Web services from a variety of different providers. Options range from individual processing engines that plug into existing application servers to large enterprise-class platforms in which Web services is one of many components. Each option provides its own set of challenges and benefits while addressing different types of requirements.

SOA Web Services Journal 08/22/05 02:51:27 PM EDT

A Review Of Oracle Application Server 10g - A Robust Option For The Enterprise. A number of solutions exist for creating Java-based Web services from a variety of different providers. Options range from individual processing engines that plug into existing application servers to large enterprise-class platforms in which Web services is one of many components. Each option provides its own set of challenges and benefits while addressing different types of requirements.

@ThingsExpo Stories
SYS-CON Events announced today that B2Cloud will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. B2Cloud specializes in IoT devices for preventive and predictive maintenance in any kind of equipment retrieving data like Energy consumption, working time, temperature, humidity, pressure, etc.
SYS-CON Events announced today that N3N will exhibit at SYS-CON's @ThingsExpo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. N3N’s solutions increase the effectiveness of operations and control centers, increase the value of IoT investments, and facilitate real-time operational decision making. N3N enables operations teams with a four dimensional digital “big board” that consolidates real-time live video feeds alongside IoT sensor data a...
SYS-CON Events announced today that Mobile Create USA will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Mobile Create USA Inc. is an MVNO-based business model that uses portable communication devices and cellular-based infrastructure in the development, sales, operation and mobile communications systems incorporating GPS capabi...
SYS-CON Events announced today that Daiya Industry will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Daiya Industry specializes in orthotic support systems and assistive devices with pneumatic artificial muscles in order to contribute to an extended healthy life expectancy. For more information, please visit https://www.daiyak...
SYS-CON Events announced today that Interface Corporation will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Interface Corporation is a company developing, manufacturing and marketing high quality and wide variety of industrial computers and interface modules such as PCIs and PCI express. For more information, visit http://www.i...
In his session at @ThingsExpo, Greg Gorman is the Director, IoT Developer Ecosystem, Watson IoT, will provide a short tutorial on Node-RED, a Node.js-based programming tool for wiring together hardware devices, APIs and online services in new and interesting ways. It provides a browser-based editor that makes it easy to wire together flows using a wide range of nodes in the palette that can be deployed to its runtime in a single-click. There is a large library of contributed nodes that help so...
Elon Musk is among the notable industry figures who worries about the power of AI to destroy rather than help society. Mark Zuckerberg, on the other hand, embraces all that is going on. AI is most powerful when deployed across the vast networks being built for Internets of Things in the manufacturing, transportation and logistics, retail, healthcare, government and other sectors. Is AI transforming IoT for the good or the bad? Do we need to worry about its potential destructive power? Or will we...
SYS-CON Events announced today that mruby Forum will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. mruby is the lightweight implementation of the Ruby language. We introduce mruby and the mruby IoT framework that enhances development productivity. For more information, visit http://forum.mruby.org/.
SYS-CON Events announced today that Suzuki Inc. will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Suzuki Inc. is a semiconductor-related business, including sales of consuming parts, parts repair, and maintenance for semiconductor manufacturing machines, etc. It is also a health care business providing experimental research for...
SYS-CON Events announced today that Nihon Micron will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Nihon Micron Co., Ltd. strives for technological innovation to establish high-density, high-precision processing technology for providing printed circuit board and metal mount RFID tags used for communication devices. For more inf...
SYS-CON Events announced today that SIGMA Corporation will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. uLaser flow inspection device from the Japanese top share to Global Standard! Then, make the best use of data to flip to next page. For more information, visit http://www.sigma-k.co.jp/en/.
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
SYS-CON Events announced today that MIRAI Inc. will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. MIRAI Inc. are IT consultants from the public sector whose mission is to solve social issues by technology and innovation and to create a meaningful future for people.
While some developers care passionately about how data centers and clouds are architected, for most, it is only the end result that matters. To the majority of companies, technology exists to solve a business problem, and only delivers value when it is solving that problem. 2017 brings the mainstream adoption of containers for production workloads. In his session at 21st Cloud Expo, Ben McCormack, VP of Operations at Evernote, will discuss how data centers of the future will be managed, how th...
SYS-CON Events announced today that Enroute Lab will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Enroute Lab is an industrial design, research and development company of unmanned robotic vehicle system. For more information, please visit http://elab.co.jp/.
Agile has finally jumped the technology shark, expanding outside the software world. Enterprises are now increasingly adopting Agile practices across their organizations in order to successfully navigate the disruptive waters that threaten to drown them. In our quest for establishing change as a core competency in our organizations, this business-centric notion of Agile is an essential component of Agile Digital Transformation. In the years since the publication of the Agile Manifesto, the conn...
The Internet giants are fully embracing AI. All the services they offer to their customers are aimed at drawing a map of the world with the data they get. The AIs from these companies are used to build disruptive approaches that cannot be used by established enterprises, which are threatened by these disruptions. However, most leaders underestimate the effect this will have on their businesses. In his session at 21st Cloud Expo, Rene Buest, Director Market Research & Technology Evangelism at Ara...
WebRTC is great technology to build your own communication tools. It will be even more exciting experience it with advanced devices, such as a 360 Camera, 360 microphone, and a depth sensor camera. In his session at @ThingsExpo, Masashi Ganeko, a manager at INFOCOM Corporation, will introduce two experimental projects from his team and what they learned from them. "Shotoku Tamago" uses the robot audition software HARK to track speakers in 360 video of a remote party. "Virtual Teleport" uses a mu...
Internet of @ThingsExpo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devic...
Mobile device usage has increased exponentially during the past several years, as consumers rely on handhelds for everything from news and weather to banking and purchases. What can we expect in the next few years? The way in which we interact with our devices will fundamentally change, as businesses leverage Artificial Intelligence. We already see this taking shape as businesses leverage AI for cost savings and customer responsiveness. This trend will continue, as AI is used for more sophistica...