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From the vice president and chief technologist for SOA at Oracle Corporation

Dave Chappell

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Top Stories by Dave Chappell

David Chappell's Blog Across financial services firms we have been seeing a new set of business priorities. There are the "grow the business" priorities that are primarily centered around things like improving customer intimacy and increasing competitive differentiation.  here are also ongoing issues of compliance to regulation and risk mitigation while also keeping an eye towards improving cost efficiency. The thing that hasn't changed is that IT is viewed as the enabler to overcome these challenges.    Financial institutions are pushing the envelope and require more processing capability, but without requiring exponential increase in hardware costs. The growth of extreme transaction processing (XTP) in areas such as fraud detection, risk computation, and stock trade resolution are pushing current solutions such as those based on the mainframe to the limit. These ... (more)

Guaranteed Messaging With JMS

The notion of guaranteed delivery of Java Message Service messages has been lightly touched on in other recently published articles on JMS. But what really makes a JMS message "guaranteed"? Should you just take it on faith, or would you like to know what's behind it? This article answers these questions via a detailed discussion of message persistence, internal acknowledgment rules, and message redelivery. Using excerpts condensed from the book we coauthored, Java Message Service, we'll explain how JMS guaranteed messaging works - including once-and-only-once delivery semantics,... (more)

Beyond The JMS Specification

The Java Message Service (JMS) is a specification put forth by Sun to define a common set of APIs and common semantics for messaging-oriented middleware providers. An increasing number of MOM vendors have embraced this specification, and new vendors are building messaging products suitable for doing business-to-business communication across the Internet. The result is a landscape where developers can feel comfortable about writing an application using a standard set of APIs while still having an ample selection of JMS-compliant vendors to choose from. However, the JMS specificat... (more)

ESB Myth Busters: 10 Enterprise Service Bus Myths Debunked

Since releasing my latest book, Enterprise Service Bus (O'Reilly Media, 2004), I have been doing a fair amount of visiting corporations, conducting seminars, and generally discussing with enterprise architects the subject of enterprise service-oriented architecture (SOA) and how an enterprise service bus (ESB) backbone can be leveraged to provide a framework for an enterprise SOA. Along the way, I have been asked many questions about the nature of an ESB. I have also fended off some misconceptions that have been growing in the general IT population regarding what an ESB is and wh... (more)

The Enterprise Service Bus (ESB) Delivering SOAs

Now that the WS-* specifications have become more mature, and SOA is becoming the new architectural pattern for enterprise infrastructures, there are new and unique architectural challenges that need to be addressed in order to fully enjoy the capabilities SOA provides. In order to fully exploit the interoperability that advanced Web Services provide, a SOA infrastructure must support operational flexibility, a heterogeneous application environment, scalability to support global deployment, and the ability to be managed and monitored from a central point. The enterprise service b... (more)