Our new ESB tutorial provides the expert advice, definitions, implementation examples, trends and news you need to get started with or optimize the performance of an enterprise service bus.
Contents
Introduction
What is an ESB?
ESB tips and trends
How to use an ESB
ESB products
Introduction
The enterprise service bus (ESB) is a software infrastructure that facilitates application integration. An ESB is valuable to the implementation of a service-oriented architecture (SOA) because it exchanges messages, executes transactions, orchestrates services, and performs publish and subscribe functions between disparate and distributed applications.
The ESB was created to meet demands and avoid common problems that other enterprise application integration (EAI) platforms could not. The popular hub and spoke EAI platform, in which all integrated applications work through a single message broker, creates a single point of failure, an incredible risk for a complex business system. The ESB, though, has numerous brokers, and so avoids this risk.
The ESB is also more suited for SOA. Unlike the hub and spoke platform, an ESB facilitates the loose-coupling of systems and the use of open-standards, two features of most successful SOA implementations. Despite these advantages, there were initial doubts about whether the ESB would be only a brief fad. Nicholas Farges' addressed this question when the ESB first appeared widely in 2003, and his assessment remains an excellent introduction to the ESB platform.
One of those doubts arose from the necessary intricacy of an ESB. Some viewers worried that implementing an ESB would only exacerbate the complexities of service orientation. As an SOA initiative matures, though, the myriad benefits of the ESB become evident: Security, agility, availability, and other key characteristics of EAI all improve once an ESB is in place. Contrary to common fears, the ESB can simplify SOA.
While an ESB can help, it's still important to choose the right one. A lightweight ESB can be implemented quickly and inexpensively, so it's often favored by developers working under tight deadlines and tight budgets. Their architect counterparts, though, may have a long-term vision and desire a more comprehensively functional ESB to support a broad SOA strategy. According to a recent Forrester Research report, the right lightweight ESB can satisfy developers and architects alike.
While many organizations are choosing which kind of ESB to implement, many vendors are choosing which kind of ESB to produce. The open-source ESB has grown popular with vendors as they face price pressure from the market and seek to cut development and support costs. Several significant mergers and acquisitions have accelerated the trend.
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What is an ESB?
ESB definition
An enterprise service bus (ESB) is a software architecture for middleware that provides fundamental services for more complex architectures.
EAI Defintion
Enterprise application integration (EAI) is a business computing term for the plans, methods, and tools aimed at modernizing, consolidating, and coordinating the computer applications in an enterprise.
http://searchsoa.techtarget.com/news/article/0,289142,sid26_gci1273230,00.html
Enterprise Service Bus (ESB): Lasting concept or latest buzzword?
Nicholas Farges took a close look at the ESB shortly after it was conceptualized. His through introduction and analysis remain valuable 6 years later to anyone who considers using an ESB.
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ESB tips and trends
Using an ESB to simplify the complexity of SOA
Why add yet another moving part into the service-oriented landscape? Isn't management of service-oriented applications already too complicated? The reasons for introducing an enterprise service bus are the same as those applied when choosing to implement an enterprise application integration strategy some years ago.
Is a lightweight ESB right for your SOA?
It's a classic conflict: Developers focused on a project and facing deadline pressure want to use a lightweight enterprise service bus (ESB), while enterprise architects have to look at the long-term impact on the service-oriented architecture (SOA) environment.
Is open-source remaking the ESB market?
The enterprise service bus (ESB) market is evolving as open source players enter it, but as in biological evolution, it appears to be a matter of adapting to survive.
Data Services for ESB's
Some ESBs are adding MDM/data services capabilities (e.g. Sun, WSO2). Do you think that's something an ESB should be doing or is this functionality that's best handled outside a service bus?
SOA complicated by ESB proliferation
Enterprise service bus (ESB) intermediation remains an issue despite the adoption of WS-* standards, argues John Michelsen, chief architect at iTKO Inc., the testing vendor specializing in service-oriented architecture (SOA). .
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How to use an ESB
User combines open source ESB with data services to speed customer reports.
Generating customer reports is the bane of most development operations. These requests flood development groups. The issue has only grown worse as organizations compile more and more data, and users more imaginatively ask 'what if?,' further taxing programmers' time. One company has taken a data services approach to solving the problem, at the same time implementing a type of Web services mashup to address user needs.
SOA integrates university's ERP project
Service-oriented architecture (SOA) allows departmental developers working on a variety of applications at the various campuses and facilities of the University of Illinois to provide data access without worrying about the data sources. All that data is available from the ESB for Ajax and rich Internet applications (RIAs) developed for the University of Illinois campuses in Champagne-Urbana, Springfield and Chicago, as well as the online campus.
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ESB products
Oracle details SOA, Java roadmap with BEA
BEA customers will not be forced to migrate to Oracle Corp. middleware products, Charles E. Phillips Jr., Oracle's president, said when he outlined plans for the integration and support of the two companies product lines in July 2008. The integration includes in innovative convergence of Oracle's ESB and BEA's Aqualogic bus.
Eclipse group releases Swordfish, an open-source ESB
This week at EclipseCon, the Eclipse Foundation formally released Swordfish, an enterprise service bus (ESB) based on OSGi. It joins a host of other open ESBs, including OpenFuse, Mule, and others.
Open source/commercial ESB hybrid reflects SOA reality
Iona Technologies Inc. today announced its own hybrid model for selling Artix, its closed source enterprise services bus (ESB), and FUSE, its open source ESB based on technology developed by the Apache Foundation.
FUSE ESB brings Apache ServiceMix 4.0 to market
In its first product release since formally becoming a division of Progress Software, Iona has announced FUSE ESB 4.0, a commercial version of the Apache ServiceMix 4.0, open source enterprise service bus (ESB). The software seeks to combine the openness of open source with the rigor of some commercialization. .
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