Service Mediation: The Role of an Enterprise Service Bus in an SOA from Tibco Software Inc. UK Computing ITHound

Service Mediation: The Role of an Enterprise Service Bus in an SOA
by Tibco Software Inc. UK
Published:December 2005
Format: Portable Document Format (.pdf)( 1.6 MB )
Length: 11 pages
Overview

Business agility--the ability to quickly adapt to changing needs--is increasingly becoming a key goal for businesses operating in the highly competitive global marketplace. Business managers need rapid resource and process reconfiguration to effect such change. To facilitate this change, IT managers are moving away from siloed processes and large monolithic enterprise software; they are examining ways to loosely couple applications together and provide business functions that can be turned into services and reused across the enterprise.

A service-oriented architecture (SOA) is a way of building an enterprise IT infrastructure out of loosely coupled components known as "services" that perform discrete functions. Composite applications are a key element of an SOA environment. These applications are created by invoking and orchestrating multiple services, events and models in such a way that they collectively perform a higher-order business function. This functionality increases business agility by enabling IT departments to reuse components that have already been tested in production and have known scalability and quality-of-service characteristics. Such reuse can help reduce time to market and lower IT development costs.

An enterprise service bus (ESB) is a distributed, message-based integration solution based on open standards. The role of an ESB is to facilitate reliable communications between IT resources such as applications, platforms and services that are distributed in multiple systems throughout an enterprise. As IT departments increasingly focus on designing SOAs to lower development costs and increase business agility, ESBs are a key first step in setting up an enterprise SOA. ESBs form the foundation of the SOA and can be complemented by additional productivity capabilities such as service orchestration and registries. This paper discusses the requirements for an ESB that can address the needs of an enterprise-ready SOA.

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