Arcitura IT Certified Professionals (AITCP)
Arcitura IT Certified Professionals (AITCP)
Arcitura IT Certified Professionals (AITCP)
Arcitura YouTube Channel
- Overview
- Introduction
- History
- Acknowledgements
- Podcasts
- Candidate Patterns
- Forms
- Press Releases
- Resources
- Compound Patterns
- Design Patterns (alphabetical)
- Overview
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Agnostic Capability
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Agnostic Context
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Agnostic Sub-Controller
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Asynchronous Queuing
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Atomic Service Transaction
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Brokered Authentication
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Canonical Expression
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Canonical Protocol
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Canonical Resources
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Canonical Schema
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Canonical Versioning
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Capability Composition
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Capability Recomposition
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Compatible Change
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Compensating Service Transaction
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Composition Autonomy
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Concurrent Contracts
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Content Negotiation
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Contract Centralization
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Contract Denormalization
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Cross-Domain Utility Layer
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Data Confidentiality
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Data Format Transformation
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Data Model Transformation
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Data Origin Authentication
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Decomposed Capability
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Decoupled Contract
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Direct Authentication
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Distributed Capability
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Domain Inventory
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Dual Protocols
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Endpoint Redirection
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Enterprise Inventory
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Entity Abstraction
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Entity Linking
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Event-Driven Messaging
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Exception Shielding
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File Gateway
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Functional Decomposition
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Idempotent Capability
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Intermediate Routing
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Inventory Endpoint
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Legacy Wrapper
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Lightweight Endpoint
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Logic Centralization
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Message Screening
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Messaging Metadata
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Metadata Centralization
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Multi-Channel Endpoint
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Non-Agnostic Context
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Partial State Deferral
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Partial Validation
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Policy Centralization
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Process Abstraction
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Process Centralization
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Protocol Bridging
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Proxy Capability
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Redundant Implementation
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Reliable Messaging
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Reusable Contract
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Rules Centralization
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Schema Centralization
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Service Agent
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Service Callback
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Service Data Replication
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Service Decomposition
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Service Encapsulation
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Service Façade
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Service Grid
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Service Instance Routing
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Service Layers
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Service Messaging
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Service Normalization
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Service Perimeter Guard
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Service Refactoring
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State Messaging
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State Repository
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Stateful Services
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Termination Notification
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Trusted Subsystem
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UI Mediator
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Utility Abstraction
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Validation Abstraction
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Version Identification
- 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
- Service Messaging Patterns
- Composition Implementation Patterns
- Service Interaction Security Patterns
- Transformation Patterns
- REST-inspired Patterns
- Cloud Computing Patterns
- Service Technology Specs
- SOA School
Service Façade (Erl)
How can a service accommodate changes to its contract or implementation while allowing the core service logic to evolve independently?
Problem
The coupling of the core service logic to contracts and implementation resources can inhibit its evolution and negatively impact service consumers.
Solution
A service façade component is used to abstract a part of the service architecture with negative coupling potential.
Application
A separate façade component is incorporated into the service design.
Impacts
The addition of the façade component introduces design effort and performance overhead.
Architecture
ServiceListen to the podcasts that accompany this site
Facade logic is placed in between the contract and the core service logic. This allows the core service logic to remain decoupled from the contract.
Related Patterns in This Catalog
Agnostic Sub-Controller, Concurrent Contracts, Contract Denormalization, Data Format Transformation, Decoupled Contract, Distributed Capability, Inventory Endpoint, Partial Validation, Proxy Capability, Service Decomposition, Service Refactoring
Related Patterns in Other Catalogs
Related Service-Oriented Computing Goals
Increased Vendor Diversification Options, Reduced IT Burden
Related Publications
SOA Pattern of the Week: Service Façade (InformIT)
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.