SOAPatterns.org

Overview
- Introduction
- History
- Acknowledgements
- Podcasts
- Candidate Patterns
- Forms
- Press Releases
- Resources
Compound Patterns
Design Patterns (alphabetical)
Design Patterns (by category)
- Foundational Inventory Patterns
- Logical Inventory Layer Patterns
- Inventory Centralization Patterns
- Inventory Implementation Patterns
- Inventory Governance Patterns
- Foundational Service Patterns
- Service Implementation Patterns
- Service Security Patterns
- Service Contract Design Patterns
- Legacy Encapsulation Patterns
- Service Governance Patterns
- Capability Composition Patterns
  - Capability Composition
  - Capability Recomposition
- Service Messaging Patterns
- Composition Implementation Patterns
- Service Interaction Security Patterns
- Transformation Patterns
- REST-inspired Patterns
Cloud Computing Patterns
Service Technology Specs
SOA School
- Home
- Matrix
- Certifications
- Courses
- Exams
- Self-Study Kits
- Workshops
- Licensing
- Online Store

Home > Design Patterns > Entity Abstraction

Entity Abstraction (Erl)

How can agnostic business logic be separated, reused, and governed independently?

Problem

Bundling both process-agnostic and process-specific business logic into the same service eventually results in the creation of redundant agnostic business logic across multiple services.

Solution

An agnostic business service layer can be established, dedicated to services that base their functional context on existing business entities.

Application

Entity service contexts are derived from business entity models and then establish a logical layer that is modeled during the analysis phase.

Impacts

The core, business-centric nature of the services introduced by this pattern require extra modeling and design attention and their governance requirements can impose dramatic organizational changes.

Principles

Service Loose Coupling, Service Abstraction, Service Reusability, Service Composability

Architecture

Inventory, Composition, Service

Entity Abstraction: A layer of entity services, each of which encapsulates processing associated with a specific business entity (or a group of related entities).

A layer of entity services, each of which encapsulates processing associated with a specific business entity (or a group of related entities).

Related Patterns in This Catalog

Agnostic Context, Agnostic Sub-Controller, Canonical Expression, Concurrent Contracts, Legacy Wrapper, Logic Centralization, Metadata Centralization, Process Abstraction, Redundant Implementation, Rules Centralization, Service Decomposition, Service Layers, Validation Abstraction

Related Service-Oriented Computing Goals

Increased Business and Technology Alignment, Increased ROI, 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.servicetechbooks.com.