Today's applications rarely live in isolation. Users expect instant access to all functions, which may be provided by disparate applications and services, inside or outside the enterprise. Integrating applications and services remains more difficult than it should be, though: developers have to deal with asynchrony, partial failures, and incompatible data models. The lack of a common vocabulary and body of knowledge for asynchronous messaging architectures made it difficult to avoid common pitfalls.
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This pattern catalog describes 65 integration patterns, collected from many integration projects since The patterns provide technology-independent design guidance for developers and architects to describe and develop robust integration solutions.
The inspiration to document these patterns came when we struggled through multiple integration vendors' product documentation just to realize later that many of the underlying concepts were quite similar. Enterprise integration is too complex to be solved with a simple 'cookbook' approach.
Instead, patterns can provide guidance by documenting the kind of experience that usually lives only in architects' heads: they are accepted solutions to recurring problems within a given context. Patterns are abstract enough to apply to most integration technologies, but specific enough to provide hands-on guidance to designers and architects.
Patterns also provide a vocabulary for developers to efficiently describe their solution. Patterns are not 'invented'; they are harvested from repeated use in practice. If you have built integration solutions, it is likely that you have used some of these patterns, maybe in slight variations and maybe calling them by a different name. The purpose of this site is not to "invent" new approaches, but to present a coherent collection of relevant and proven patterns, which in total form an integration pattern language.
The current patterns focus on Messaging , which forms the basis of most other integration patterns. We have started to harvest more patterns but are realizing once again how much work documenting these patterns really is. So please stay tuned. We have documented 65 messaging patterns , organized as follows:.
The patterns are not tied to a specific implementation. They help you design better solutions, whether you use any of the following platforms:. We want to encourage widespread use of the integration pattern language. We have therefore provided a variety of ways to access them:. The book is now over 10 years old. Yet, the integration problems we have to solve every day remain frustratingly similar.
Because the patterns encapsulate design knowledge, this knowledge does not age nearly as quickly as a specific technology. We welcome your feedback at: info enterpriseintegrationpatterns. The patterns on this site are the result of discussions involving numerous individuals. My new book describes how architects can play a critical role in IT transformation by applying their technical, communication, and organizational skills with 37 episodes from large-scale enterprise IT.
DRM-free eBook on Leanpub. Print book on Amazon. Message Construct. Command Message. Document Message. Event Message. Return Address. Correlation Identifier. Message Sequence. Message Expiration. Format Indicator. Message Routing. Message Router. Content-based Router. Message Filter. Dynamic Router. Recipient List. Composed Msg. Routing Slip. Process Manager. Message Broker. Message Transformation. Message Translator. Envelope Wrapper. Content Enricher. Content Filter. Claim Check.
Canonical Data Model. Messaging Endpoints. 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. Messaging Channels. Message Channel. Point-to-Point Channel. Datatype Channel. Invalid Message Channel. Dead Letter Channel. Guaranteed Delivery. Channel Adapter. Messaging Bridge. Message Bus. Systems Mgmt.
Control Bus. Message History. Message Store. Smart Proxy. Test Message. Channel Purger. Want to read more in depth?
Check out My Articles. Want to see me live? See where I am speaking next. From Enterprise Integration to Enterprise Transformation: My new book describes how architects can play a critical role in IT transformation by applying their technical, communication, and organizational skills with 37 episodes from large-scale enterprise IT.
Parts of this page are made available under the Creative Commons Attribution license. You can reuse the pattern icon, the pattern name, the problem and solution statements in bold , and the sketch under this license. Other portions of the text, such as text chapters or the full pattern text, are protected by copyright. Messaging Patterns Table of Contents.
Enterprise Integration Patterns
Enterprise Integration Patterns provides an invaluable catalog of sixty-five patterns, with real-world solutions that demonstrate the formidable of messaging and help you to design effective messaging solutions for your enterprise. A case study describing a bond trading system illustrates the patterns in practice, and the book offers a look at emerging standards, as well as insights into what the future of enterprise integration might hold. This book provides a consistent vocabulary and visual notation framework to describe large-scale integration solutions across many technologies. It also explores in detail the advantages and limitations of asynchronous messaging architectures. The authors present practical advice on designing code that connects an application to a messaging system, and provide extensive information to help you determine when to send a message, how to route it to the proper destination, and how to monitor the health of a messaging system.
Enterprise Integration Patterns: Designing, Building, and Deploying Messaging Solutions
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This pattern catalog describes 65 integration patterns, collected from many integration projects since The patterns provide technology-independent design guidance for developers and architects to describe and develop robust integration solutions. The inspiration to document these patterns came when we struggled through multiple integration vendors' product documentation just to realize later that many of the underlying concepts were quite similar. Enterprise integration is too complex to be solved with a simple 'cookbook' approach.
This site is maintained by Gregor Hohpe " hoh-puh ". I am a Singapore Smart Nation Fellow who advises on transformation and cloud architecture strategy. Naturally, the opinions expressed on this site are my personal ones, not those of my current or past employers. I enjoy seeing the field of IT from different angles consulting, software engineering, corporate IT and collecting my thoughts in my ramblings.