Welcome!

Recurring Revenue Authors: Ed Featherston, PagerDuty Blog, Liz McMillan, Elizabeth White, Yakov Fain

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
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life sett...
There are several IoTs: the Industrial Internet, Consumer Wearables, Wearables and Healthcare, Supply Chains, and the movement toward Smart Grids, Cities, Regions, and Nations. There are competing communications standards every step of the way, a bewildering array of sensors and devices, and an entire world of competing data analytics platforms. To some this appears to be chaos. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, Bradley Holt, Developer Advocate a...
Cognitive Computing is becoming the foundation for a new generation of solutions that have the potential to transform business. Unlike traditional approaches to building solutions, a cognitive computing approach allows the data to help determine the way applications are designed. This contrasts with conventional software development that begins with defining logic based on the current way a business operates. In her session at 18th Cloud Expo, Judith S. Hurwitz, President and CEO of Hurwitz & ...
In his general session at 18th Cloud Expo, Lee Atchison, Principal Cloud Architect and Advocate at New Relic, discussed cloud as a ‘better data center’ and how it adds new capacity (faster) and improves application availability (redundancy). The cloud is a ‘Dynamic Tool for Dynamic Apps’ and resource allocation is an integral part of your application architecture, so use only the resources you need and allocate /de-allocate resources on the fly.
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, wh...
19th Cloud Expo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterpri...
SYS-CON Events announced today that Bsquare has been named “Silver Sponsor” of SYS-CON's @ThingsExpo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. For more than two decades, Bsquare has helped its customers extract business value from a broad array of physical assets by making them intelligent, connecting them, and using the data they generate to optimize business processes.
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 19th 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 devices - comp...
There is little doubt that Big Data solutions will have an increasing role in the Enterprise IT mainstream over time. Big Data at Cloud Expo - to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA - has announced its Call for Papers is open. Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is...
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, discussed how research has demonstrated the value of Machine Learning in delivering next generation analytics to imp...
The 19th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Digital Transformation, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportuni...
Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is expected in the amount of information being processed, managed, analyzed, and acted upon by enterprise IT. This amazing is not part of some distant future - it is happening today. One report shows a 650% increase in enterprise data by 2020. Other estimates are even higher....
The cloud market growth today is largely in public clouds. While there is a lot of spend in IT departments in virtualization, these aren’t yet translating into a true “cloud” experience within the enterprise. What is stopping the growth of the “private cloud” market? In his general session at 18th Cloud Expo, Nara Rajagopalan, CEO of Accelerite, explored the challenges in deploying, managing, and getting adoption for a private cloud within an enterprise. What are the key differences between wh...
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo Silicon Valley Call for Papers is now open.
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his Day 2 Keynote at @ThingsExpo, Henrik Kenani Dahlgren, Portfolio Marketing Manager at Ericsson, discussed how to plan to cooperate, partner, and form lasting all-star teams to change t...
Connected devices and the industrial internet are growing exponentially every year with Cisco expecting 50 billion devices to be in operation by 2020. In this period of growth, location-based insights are becoming invaluable to many businesses as they adopt new connected technologies. Knowing when and where these devices connect from is critical for a number of scenarios in supply chain management, disaster management, emergency response, M2M, location marketing and more. In his session at @Th...
SYS-CON Events announced today that ReadyTalk, a leading provider of online conferencing and webinar services, has been named Vendor Presentation Sponsor at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. ReadyTalk delivers audio and web conferencing services that inspire collaboration and enable the Future of Work for today’s increasingly digital and mobile workforce. By combining intuitive, innovative tec...
Amazon has gradually rolled out parts of its IoT offerings, but these are just the tip of the iceberg. In addition to optimizing their backend AWS offerings, Amazon is laying the ground work to be a major force in IoT - especially in the connected home and office. In his session at @ThingsExpo, Chris Kocher, founder and managing director of Grey Heron, explained how Amazon is extending its reach to become a major force in IoT by building on its dominant cloud IoT platform, its Dash Button strat...
industrial company for a multi-year contract initially valued at over $4.0 million. In addition to DataV software, Bsquare will also provide comprehensive systems integration, support and maintenance services. DataV leverages advanced data analytics, predictive reasoning, data-driven diagnostics, and automated orchestration of remediation actions in order to improve asset uptime while reducing service and warranty costs.
Vidyo, Inc., has joined the Alliance for Open Media. The Alliance for Open Media is a non-profit organization working to define and develop media technologies that address the need for an open standard for video compression and delivery over the web. As a member of the Alliance, Vidyo will collaborate with industry leaders in pursuit of an open and royalty-free AOMedia Video codec, AV1. Vidyo’s contributions to the organization will bring to bear its long history of expertise in codec technolo...