Publish-Subscribe

One publisher, many independent subscribers.

• Format.puml
• Length20 lines
• LibraryEnterprise Integration Patterns

The source

20 lines of PlantUML, and pulls in Enterprise Integration Patterns. Copy it, or open the template inside Gnomon and render it as it is.

@startuml
!include https://raw.githubusercontent.com/plantuml-stdlib/EIP-PlantUML/main/dist/EIP-PlantUML.puml

title Publish-Subscribe Pattern

MessagingGateway(publisher, "Event Publisher")
PubSubChannel(topic, "Order Events")

DurableSubscriber(inventory, "Inventory Service")
DurableSubscriber(shipping, "Shipping Service")
DurableSubscriber(billing, "Billing Service")
NonDurableSubscriber(analytics, "Analytics Service")

Send(publisher, topic)
Send(topic, inventory)
Send(topic, shipping)
Send(topic, billing)
Send(topic, analytics)

@enduml

Others in Enterprise integration pattern diagrams

• Simple MessagingA channel and two endpoints: the vocabulary in miniature.
• Content-Based RouterRoute by message content. Where most integrations start.
• Splitter-AggregatorSplit a message, process the parts, put them back together.
• Pipes and FiltersA processing chain where each stage is replaceable.
• Request-ReplyAsync messaging that still needs an answer.
• Error HandlingWhat happens when a message cannot be processed. Draw this one.
• Wire Tap (Monitoring)Observe traffic without changing it: for audit and monitoring.