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.
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: File Transfer Shared Database Remote Procedure Invocation 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.
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
External links