enterprise integration patterns
TRANSCRIPT
Enterprise Integration patterns
Johan AluddenTwitter: johanaludden
Mail: [email protected]: johanaludden.com/weblog
Integration styles
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Integration styles• File transfer
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Integration styles• File transfer• Shared Database
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Integration styles• File transfer• Shared Database• Remote Procedure Invocation
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Integration styles• File transfer• Shared Database• Remote Procedure Invocation• Messaging
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Messaging
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Messaging• Channels
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Messaging• Channels• Messages
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Producer Consumer
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Producer Consumer• Many producers - Many Consumers
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Producer Consumer• Many producers - Many Consumers• Message read once
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Producer Consumer• Many producers - Many Consumers• Message read once• Load balancing
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Producer Consumer• Many producers - Many Consumers• Message read once• Load balancing• Parallelization
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Publish subscribe
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Publish subscribe• Many Producers - Many Consumers
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Publish subscribe• Many Producers - Many Consumers• Message read once per subscriber
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Publish subscribe• Many Producers - Many Consumers• Message read once per subscriber• Broad casting
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Publish subscribe• Many Producers - Many Consumers• Message read once per subscriber• Broad casting• Different processing
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Channel Types• Producer Consumer• Publish Subscribe
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Common Properties• Asynchronous• One Way Communication
Document Message
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Document Message• Send information
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Document Message• Send information• Receiver decides what to do
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Document Message• Send information• Receiver decides what to do• Single unit of data
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Command Message
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Command Message• Send a command
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Command Message• Send a command• Sender tells what to do
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Command Message• Send a command• Sender tells what to do• Single Unit of Work
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Message Types• Document message• Command message
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Common Patterns
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You want to send a request and get a reply
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Sender Receiver
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Sender ReceiverRequest
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Sender ReceiverRequest
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Sender Receiver
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Sender Receiver
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Sender Receiver
Reply
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Sender Receiver
Reply
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Sender Receiver
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Sender Receiver
RequestID: 2
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Sender Receiver
RequestID: 2
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Sender Receiver
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Sender Receiver
RequestID: 3
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Sender Receiver
RequestID: 3
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Sender Receiver
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Sender Receiver
ReplyID: 3
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Sender Receiver
ReplyID: 3
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Sender Receiver
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Sender Receiver
ReplyID: 2
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Sender Receiver
ReplyID: 2
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Sender Receiver
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Request - Reply
Sender Receiver
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One message with parts that can be handled individually
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Sender Receiver
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Sender Receiver
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Sender Receiver
Message
Part 1
Part 2
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Sender Receiver
Message
Part 1
Part 2
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Sender Receiver
Part 1
Part 2
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Sender Receiver
Part 1
Part 2
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Sender Receiver
Part 1
Part 2
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Splitter
Sender Receiver
Part 1
Part 2
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Many Messages that needs to be handled together
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Sender
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Sender Receiver
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Sender Receiver
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Sender Receiver
Part 1
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Sender Receiver
Part 1
Part 2
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Sender Receiver
Part 1
Part 2
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Sender ReceiverPart 1
Part 2
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Sender ReceiverPart 1
Part 2
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Sender Receiver
Message
Part 1
Part 2
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Sender Receiver
Message
Part 1
Part 2
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Aggregator
Sender Receiver
Message
Part 1
Part 2
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You have one entry point for messages but they need to be
handled by different processes
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Sender
Receiver 1
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Receiver 2
Sender
Receiver 1
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Receiver 2
Router
Sender
Receiver 1
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Receiver 2
The sender and the receiver does not speak the same
language
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Sender
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Sender Receiver
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Sender Receiver
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Translator
Sender Receiver
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You have messages that have the same semantic but
different formats
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Sender 1
Receiver
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Sender 2
Router
Sender 1
Receiver
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Sender 2
Translator
Translator
Router
Normalizer
Sender 1
Receiver
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Sender 2
Translator
Translator
You want to send the same message to many but to
handle the responses together
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AggregatorSender 1 Receiver
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Service 1
Service 2
Aggregator
Scatter Gather
Sender 1 Receiver
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Service 1
Service 2
Pipes & Filter• Like Lego• Combine different patterns
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Other Patterns• Resequencer• Routing slip
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Links• Enterprise Integration Patterns site, http://www.eaipatterns.com/
• Book, http://www.amazon.com/Enterprise-Integration-Patterns-Designing-Deploying/dp/0321200683
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Questions?
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