Select a Pattern Agnostic Capability Agnostic Context Agnostic Sub-Controller Asynchronous Queuing Atomic Service Transaction Brokered Authentication Canonical Expression Canonical Protocol Canonical Resources Canonical Schema Canonical Schema Bus Canonical Versioning Capability Composition Capability Recomposition Compatible Change Compensating Service Transaction Composition Autonomy Concurrent Contracts Contract Centralization Contract Denormalization Cross-Domain Utility Layer Data Confidentiality Data Format Transformation Data Model Transformation Data Origin Authentication Decomposed Capability Decoupled Contract Direct Authentication Distributed Capability Domain Inventory Dual Protocols Enterprise Inventory Enterprise Service Bus Entity Abstraction Event-Driven Messaging Exception Shielding Federated Endpoint Layer File Gateway Functional Decomposition Intermediate Routing Inventory Endpoint Legacy Wrapper Logic Centralization Message Screening Messaging Metadata Metadata Centralization Multi-Channel Endpoint Non-Agnostic Context Official Endpoint Orchestration Partial State Deferral Partial Validation Policy Centralization Process Abstraction Process Centralization Protocol Bridging Proxy Capability Redundant Implementation Reliable Messaging Rules Centralization Schema Centralization Service Agent Service Broker Service Callback Service Data Replication Service Decomposition Service Encapsulation Service Facade Service Grid Service Instance Routing Service Layers Service Messaging Service Normalization Service Perimeter Guard Service Refactoring State Messaging State Repository Stateful Services Termination Notification Three-Layer Inventory Trusted Subsystem UI Mediator Utility Abstraction Validation Abstraction Version Identification Overview     History     Acknowledgements     Podcasts     Notification Form     Feedback Form     Press Release #1     Press Release #2     Press Release #3 Master SOA Design Pattern Catalog     Master Pattern List (alphabetical)     Master Pattern List (by category)     Master Pattern List with Page Numbers (PDF)     Master Pattern List (Text)     Pattern Notation     Pattern Profiles     Symbol Legend     Pattern Contribution Form SOA Candidate Patterns     SOA Patterns Review Committee     Candidate Patterns Overview     Candidate Patterns List     Candidate Pattern Contribution Form     Candidate Pattern Feedback Form     SOA Pattern Template Design Pattern Basics     What's a Design Pattern?     What's a Design Pattern Language?     What's a Compound Pattern? Supplemental     SOA Patterns and Application Technologies     SOA Design Patterns Historical Influences     SOA Design Patterns and Design Principles     SOA Design Patterns and Design Granularity     Legal Resources     Design Patterns Publications     Reference Posters     SOAPrinciples.com     WhatIsSOA.com     SOA Visio Stencil Data Format Transformation (Little, Rischbeck, Simon) Home > Transformation Patterns > Data Format Transformation How can services interact with programs that communicate with different data formats?   Problem A service may be incompatible with resources it needs to access due to data format disparity. Furthermore, a service consumer that communicates using a data format different from a target service will be incompatible and therefore unable to invoke the service. Solution Intermediary data format transformation logic needs to be introduced in order to dynamically translate one data format into another. Application This necessary transformation logic is incorporated by adding internal service logic, service agents, or a dedicated transformation service. Impacts The use of data format transformation logic inevitably adds development effort, design complexity, and performance overhead. Principles Standardized Service Contract, Service Loose Coupling Architecture Inventory, Composition, Service   A Format Conversion utility service is added to the architecture. This service abstracts the legacy application API and provides XML-to-CSV and CSV-to-XML functions. Note that in the depicted architecture, the Format Conversion service exists as a component being reused by multiple components that are part of Web services, as per Dual Protocols. Audio Podcast This pattern is discussed as part of the audio podcast: The ESB and Related Messaging Patterns   Related Patterns in This Catalog Canonical Protocol (Erl), Data Model Transformation (Erl), File Gateway (Roy), Inventory Endpoint (Erl), Legacy Wrapper (Erl, Roy), Multi-Channel Endpoint (Roy), Protocol Bridging (Little, Rischbeck, Simon), Service Agent (Erl), Service Facade (Erl) Related Service-Oriented Computing Goals Increased Vendor Diversification Options, Increased Business and Technology Alignment, Reduced IT Burden This page contains excerpts from: SOA Design Patterns by Thomas Erl Foreword by Grady Booch With contributions from David Chappell, Jason Hogg, Anish Karmarkar, Mark Little, David Orchard, Satadru Roy, Thomas Rischbeck, Arnaud Simon, Clemens Utschig, Dennis Wisnosky, and others. (ISBN: 0136135161, Hardcover, Full-Color, 400+ Illustrations, 865 pages) For more information about this book, visit www.soabooks.com.

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