Message Queue

Kind: mechanism

Layer: Execution Core

Record: architecture:message-queue

Severity: contextual

Scope: integration, async processing

Canonical: Ontology

A mechanism that holds messages durably until a consumer takes and acknowledges each one.

Listed in Architecture principles, after Publish/Subscribe Pattern and before Message Broker.

Requires

• Message Contract
• Consumer

Reinforces

• Resilience
• Backpressure

Enables

• Asynchronous Processing

Conflicts with

• In-Memory Direct Invocation

In tension with

• Latency

Tensions

• Message Queue / Latency

Violated by

• Missing Backpressure

Refactored by

• Competing Consumers

Severity

• contextual

Category

• Event / Messaging / Asynchronous Architecture

Required by

• Message Broker
• Dead-Letter Queue

Refactors

• Message Broker
• Asynchronous Communication

Linked from

• The board and the venue
• Event / Messaging / Asynchronous Architecture
• Error Handling / Resilience
• Scalability / Performance / Optimization
• Core Vocabulary
• Event Messaging Async
• Severity levels
• The resolutions