Message Broker

Kind: artifact

Layer: Execution Core

Record: architecture:message-broker

Severity: contextual

Scope: integration, messaging

Canonical: Ontology

Descriptive data about topics, queues and routing rules, held by an intermediary service that delivers messages between producers and consumers.

Listed in Architecture principles, after Message Queue and before Event Bus.

Requires

• Message Queue
• Routing

Reinforces

• Low Coupling
• Scalability

Enables

• Publish/Subscribe Pattern
• Work Distribution

Conflicts with

• Point-to-Point Coupling

In tension with

• Operational Dependency

Tensions

• Message Broker / Operational Dependency

Violated by

• Direct Point-to-Point Calls

Refactored by

• Message Queue

Severity

• contextual

Category

• Event / Messaging / Asynchronous Architecture

Linked from

• Core Modular Design
• Event / Messaging / Asynchronous Architecture
• Scalability / Performance / Optimization
• Event Messaging Async
• Severity levels
• The resolutions