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 Inventory Endpoint (Erl) Home > Inventory Implementataion Patterns > Inventory Endpoint How can a service inventory be shielded from external access while still offering service capabilities to external consumers?   Problem A group of services delivered for a specific inventory may provide capabilities that are useful to services outside of that inventory. However, for security and governance reasons, it may not be desirable to expose all services or all service capabilities to external consumers. Solution Abstract the relevant capabilities into an endpoint service that acts as a the official inventory entry point dedicated to a specific set of external consumers. Application The endpoint service can expose a contract with the same capabilities as its underlying services, but augmented with policies or other characteristics to accommodate external consumer interaction requirements. Impacts Endpoint services can increase the governance freedom of underlying services but can also increase governance effort by introducing redundant service logic and contracts into an inventory. Principles Standardized Service Contract, Service Loose Coupling, Service Abstraction Architecture Inventory A new service introduced to facilitate external consumer requirements can ensure that other native inventory services are not affected. Related Patterns in This Catalog Atomic Service Transaction (Erl), Composition Autonomy (Erl), Concurrent Contracts (Erl), Contract Centralization (Erl), Data Format Transformation (Erl), Data Model Transformation (Erl), Domain Inventory (Erl), Enterprise Inventory (Erl), Logic Centralization (Erl), Process Abstraction (Erl), Protocol Bridging (Little, Rischbeck, Simon), Redundant Implementation (Erl), Service Facade (Erl), Service Normalization (Erl), Service Perimeter Guard (Hogg, Smith, Chong, Hollander, Kozaczynski, Brader, Delgado, Taylor, Wall, Slater, Imran, Cibraro, Cunningham) Related Service-Oriented Computing Goals Increased Intrinsic Interoperability, 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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