Enterprise Integration Patterns

Enterprise Integration Patterns is a book by Gregor Hohpe and Bobby Woolf which describes 65 patterns for the use of enterprise application integration and message-oriented middleware in the form of a pattern language.

Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions

Author	Gregor Hohpe and Bobby Woolf
Language	English
Series	Martin Fowler Signature Series
Subject	Enterprise integration pattern
Genre	Non-fiction, Software development
Published	10 October 2003
ISBN	978-0321200686

The integration (messaging) pattern language

The pattern language presented in the book consists of 65 patterns structured into 9 categories, which largely follow the flow of a message from one system to the next through channels, routing, and transformations. The book includes an icon-based pattern language, sometimes nicknamed "GregorGrams" after one of the authors. Excerpts from the book (short pattern descriptions) are available on the supporting website (see External links).

Integration styles and types

The book distinguishes four top-level alternatives for integration:

1. File Transfer
2. Shared Database
3. Remote Procedure Invocation
4. Messaging

The following integration types are introduced:

• Information Portal
• Data Replication
• Shared Business Function
• Service Oriented Architecture
• Distributed Business Process
• Business-to-Business Integration
• Tightly Coupled Interaction vs. Loosely Coupled Interaction

Messaging

• Message Channel
• Message
• Pipes and Filters
• Message Router
• Message Translator
• Message Endpoint

Message Channel

• Point-to-Point Channel
• Publish-Subscribe Channel
• Datatype Channel
• Invalid Message Channel
• Dead Letter Channel
• Guaranteed Delivery
• Channel Adapter
• Messaging Bridge
• Message Bus

Message Construction

• Command Message
• Document Message
• Event Message
• Request-Reply
• Return Address
• Correlation Identifier
• Message Sequence
• Message Expiration
• Format Indicator

Message Router

• Content-Based Router
• Message Filter
• Dynamic Router
• Recipient List
• Splitter
• Aggregator
• Resequencer
• Composed Message Processor
• Scatter-Gather
• Routing Slip
• Process Manager
• Message Broker

Message Transformation

• Envelope Wrapper
• Content Enricher
• Content Filter
• Claim Check
• Normalizer
• Canonical Data Model

Message Endpoint

• Messaging Gateway
• Messaging Mapper
• Transactional Client
• Polling Consumer
• Event-Driven Consumer
• Competing Consumers
• Message Dispatcher
• Selective Consumer
• Durable Subscriber
• Idempotent Receiver
• Service Activator

System Management

• Control Bus
• Detour
• Wire Tap
• Message History
• Message Store
• Smart Proxy
• Test Message
• Channel Purger

The pattern language continues to be relevant as of today, for instance in cloud application development and integration, and in the internet of things. In 2015, the two book authors reunited—for the first time since the publication of the book—for a retrospective and interview in IEEE Software.^[1]

Implementation

Enterprise Integration Patterns are implemented in many open source integration solutions. Notable implementations include Spring Integration, Apache Camel, Red Hat Fuse, Mule ESB and Guaraná DSL.

See also

• Enterprise messaging system
• Loose coupling
• Software design pattern

References

1. Zimmermann, Olaf; Pautasso, Cesare; Hohpe, Gregor; Woolf, Bobby (2016). "A Decade of Enterprise Integration Patterns: A Conversation with the Authors". IEEE Software. 33 (1): 13–19. doi:10.1109/MS.2016.11.

External links

• Official website
• "Table Of Contents". Retrieved 4 June 2014.
• "The Add-in for Enterprise Architect extended the capability of this tool to create EIP models". Archived from the original on 27 November 2021. Retrieved 8 April 2016.