Welcome!

Oracle Authors: Elizabeth White, Carmen Gonzalez, Suhas Uliyar, Jason Bloomberg, Rex Morrow, Datical

Related Topics: Oracle, SOA & WOA

Oracle: 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)

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.


@ThingsExpo Stories
Samsung VP Jacopo Lenzi, who headed the company's recent SmartThings acquisition under the auspices of Samsung's Open Innovaction Center (OIC), answered a few questions we had about the deal. This interview was in conjunction with our interview with SmartThings CEO Alex Hawkinson. IoT Journal: SmartThings was developed in an open, standards-agnostic platform, and will now be part of Samsung's Open Innovation Center. Can you elaborate on your commitment to keep the platform open? Jacopo Lenzi: Samsung recognizes that true, accelerated innovation cannot be driven from one source, but requires a...
Explosive growth in connected devices. Enormous amounts of data for collection and analysis. Critical use of data for split-second decision making and actionable information. All three are factors in making the Internet of Things a reality. Yet, any one factor would have an IT organization pondering its infrastructure strategy. How should your organization enhance its IT framework to enable an Internet of Things implementation? In his session at Internet of @ThingsExpo, James Kirkland, Chief Architect for the Internet of Things and Intelligent Systems at Red Hat, will describe how to revoluti...
The Internet of Things will greatly expand the opportunities for data collection and new business models driven off of that data. In her session at Internet of @ThingsExpo, Esmeralda Swartz, CMO of MetraTech, will discuss how for this to be effective you not only need to have infrastructure and operational models capable of utilizing this new phenomenon, but increasingly service providers will need to convince a skeptical public to participate. Get ready to show them the money! Speaker Bio: Esmeralda Swartz, CMO of MetraTech, has spent 16 years as a marketing, product management, and busin...
SYS-CON Events announced today that Red Hat, the world's leading provider of open source solutions, will exhibit at Internet of @ThingsExpo, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Red Hat is the world's leading provider of open source software solutions, using a community-powered approach to reliable and high-performing cloud, Linux, middleware, storage and virtualization technologies. Red Hat also offers award-winning support, training, and consulting services. As the connective hub in a global network of enterprises, partners, a...
P2P RTC will impact the landscape of communications, shifting from traditional telephony style communications models to OTT (Over-The-Top) cloud assisted & PaaS (Platform as a Service) communication services. The P2P shift will impact many areas of our lives, from mobile communication, human interactive web services, RTC and telephony infrastructure, user federation, security and privacy implications, business costs, and scalability. In his session at Internet of @ThingsExpo, Robin Raymond, Chief Architect at Hookflash Inc., will walk through the shifting landscape of traditional telephone a...
BSQUARE is a global leader of embedded software solutions. We enable smart connected systems at the device level and beyond that millions use every day and provide actionable data solutions for the growing Internet of Things (IoT) market. We empower our world-class customers with our products, services and solutions to achieve innovation and success. For more information, visit www.bsquare.com.
SYS-CON Events announced today that Matrix.org has been named “Silver Sponsor” of Internet of @ThingsExpo, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Matrix is an ambitious new open standard for open, distributed, real-time communication over IP. It defines a new approach for interoperable Instant Messaging and VoIP based on pragmatic HTTP APIs and WebRTC, and provides open source reference implementations to showcase and bootstrap the new standard. Our focus is on simplicity, security, and supporting the fullest feature set.
How do APIs and IoT relate? The answer is not as simple as merely adding an API on top of a dumb device, but rather about understanding the architectural patterns for implementing an IoT fabric. There are typically two or three trends: Exposing the device to a management framework Exposing that management framework to a business centric logic • Exposing that business layer and data to end users. This last trend is the IoT stack, which involves a new shift in the separation of what stuff happens, where data lives and where the interface lies. For instance, it’s a mix of architectural style...
SYS-CON Events announced today that SOA Software, an API management leader, will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. SOA Software is a leading provider of API Management and SOA Governance products that equip business to deliver APIs and SOA together to drive their company to meet its business strategy quickly and effectively. SOA Software’s technology helps businesses to accelerate their digital channels with APIs, drive partner adoption, monetize their assets, and achieve a...
From a software development perspective IoT is about programming "things," about connecting them with each other or integrating them with existing applications. In his session at @ThingsExpo, Yakov Fain, co-founder of Farata Systems and SuranceBay, will show you how small IoT-enabled devices from multiple manufacturers can be integrated into the workflow of an enterprise application. This is a practical demo of building a framework and components in HTML/Java/Mobile technologies to serve as a platform that can integrate new devices as they become available on the market.
SYS-CON Events announced today that Utimaco will exhibit at SYS-CON's 15th International Cloud Expo®, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Utimaco is a leading manufacturer of hardware based security solutions that provide the root of trust to keep cryptographic keys safe, secure critical digital infrastructures and protect high value data assets. Only Utimaco delivers a general-purpose hardware security module (HSM) as a customizable platform to easily integrate into existing software solutions, embed business logic and build s...
Connected devices are changing the way we go about our everyday life, from wearables to driverless cars, to smart grids and entire industries revolutionizing business opportunities through smart objects, capable of two-way communication. But what happens when objects are given an IP-address, and we rely on that connection, sometimes with our lives? How do we secure those vast data infrastructures and safe-keep the privacy of sensitive information? This session will outline how each and every connected device can uphold a core root of trust via a unique cryptographic signature – a “bir...
Internet of @ThingsExpo Silicon Valley announced on Thursday its first 12 all-star speakers and sessions for its upcoming event, which will take place November 4-6, 2014, at the Santa Clara Convention Center in California. @ThingsExpo, the first and largest IoT event in the world, debuted at the Javits Center in New York City in June 10-12, 2014 with over 6,000 delegates attending the conference. Among the first 12 announced world class speakers, IBM will present two highly popular IoT sessions, which will take place November 4-6, 2014 at the Santa Clara Convention Center in Santa Clara, Calif...
Almost everyone sees the potential of Internet of Things but how can businesses truly unlock that potential. The key will be in the ability to discover business insight in the midst of an ocean of Big Data generated from billions of embedded devices via Systems of Discover. Businesses will also need to ensure that they can sustain that insight by leveraging the cloud for global reach, scale and elasticity.
WebRTC defines no default signaling protocol, causing fragmentation between WebRTC silos. SIP and XMPP provide possibilities, but come with considerable complexity and are not designed for use in a web environment. In his session at Internet of @ThingsExpo, Matthew Hodgson, technical co-founder of the Matrix.org, will discuss how Matrix is a new non-profit Open Source Project that defines both a new HTTP-based standard for VoIP & IM signaling and provides reference implementations.

SUNNYVALE, Calif., Oct. 20, 2014 /PRNewswire/ -- Spansion Inc. (NYSE: CODE), a global leader in embedded systems, today added 96 new products to the Spansion® FM4 Family of flexible microcontrollers (MCUs). Based on the ARM® Cortex®-M4F core, the new MCUs boast a 200 MHz operating frequency and support a diverse set of on-chip peripherals for enhanced human machine interfaces (HMIs) and machine-to-machine (M2M) communications. The rich set of periphera...

SYS-CON Events announced today that Aria Systems, the recurring revenue expert, has been named "Bronze Sponsor" of SYS-CON's 15th International Cloud Expo®, which will take place on November 4-6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Aria Systems helps leading businesses connect their customers with the products and services they love. Industry leaders like Pitney Bowes, Experian, AAA NCNU, VMware, HootSuite and many others choose Aria to power their recurring revenue business and deliver exceptional experiences to their customers.
The Internet of Things (IoT) is going to require a new way of thinking and of developing software for speed, security and innovation. This requires IT leaders to balance business as usual while anticipating for the next market and technology trends. Cloud provides the right IT asset portfolio to help today’s IT leaders manage the old and prepare for the new. Today the cloud conversation is evolving from private and public to hybrid. This session will provide use cases and insights to reinforce the value of the network in helping organizations to maximize their company’s cloud experience.
The Internet of Things (IoT) is making everything it touches smarter – smart devices, smart cars and smart cities. And lucky us, we’re just beginning to reap the benefits as we work toward a networked society. However, this technology-driven innovation is impacting more than just individuals. The IoT has an environmental impact as well, which brings us to the theme of this month’s #IoTuesday Twitter chat. The ability to remove inefficiencies through connected objects is driving change throughout every sector, including waste management. BigBelly Solar, located just outside of Boston, is trans...
SYS-CON Events announced today that Matrix.org has been named “Silver Sponsor” of Internet of @ThingsExpo, which will take place on November 4–6, 2014, at the Santa Clara Convention Center in Santa Clara, CA. Matrix is an ambitious new open standard for open, distributed, real-time communication over IP. It defines a new approach for interoperable Instant Messaging and VoIP based on pragmatic HTTP APIs and WebRTC, and provides open source reference implementations to showcase and bootstrap the new standard. Our focus is on simplicity, security, and supporting the fullest feature set.