 Issue XXIV, December 2008 |
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The Case for Single-Purpose Services: Understanding the Non-Agnostic Context and a Strategy for Implementation
by Herbjorn Wilhelmsen Justifying the extra investment for developing a single-purpose service - a service expected to solve only one large business problem - instead of putting the single-purpose logic inside a non-service-oriented application can be challenging. Reuse, the most popular motivation for creating services, will not apply. So where's the business case? Acceptable justifications can include: enabling support for multiple providers, isolating logic from change, centralizing IT-support for a given business process, service composition optimization, and separation of concerns. Although performance is commonly referenced as a reason to not create services, that line of thought is not always valid... [view] |
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Message Auditing in Service-Oriented Architecture
by Kanu Tripathi For many organizations, auditing is a crucial task that needs to be performed on a regular basis to stay on top of various activities and to remain compliant with regulations. This article explores the auditing of messages in a typical service-oriented system implementation. A case is built for having a system for auditing messages, followed by an exploration of the requirements this type of system can address. A candidate architecture and design of the system is the provided, concluding how the original goals can be attained. Finally some examples are given and some caveats are highlighted... [view] |
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REST-Inspired SOA Design Patterns
by Raj Balasubramanian Historically, the most common means of building services has been via the Web services (WS-*) platform. There has recently been an emerging paradigm of using a simpler services development approach by employing the fundamental principles that makes the Web successful, as embodied within the REST framework. A series of REST-inspired SOA patterns has been developed as candidate patterns for inclusion in the master SOA design patterns catalog. You are invited to review, study, and provide feedback about these patterns... [view] |
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SOAPatterns.org - A Community Site Dedicated to SOA Patterns by Thomas Erl A new Web site has been launched dedicated to the on-going development of SOA patterns and the expansion of the master SOA pattern catalog. SOAPatterns.org publishes summarized descriptions of all 85 patterns from the recently released book "SOA Design Patterns" along with 20 candidate patterns that are currently under review and in development. You can join the SOA patterns community by providing feedback and reviews and contributing your own patterns... [view] |
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