Asynchronous Communication

Kind: principle

Layer: Execution Core

Record: architecture:asynchronous-communication

Severity: contextual

Scope: service, system

Canonical: Ontology

A design rule that work the caller does not need at once is sent as a message, so the caller does not wait on it.

Listed in Architecture principles, after Integration Events and before Eventual Consistency.

Requires

• Message Contract
• Retry Safety

Reinforces

• Resilience
• Low Coupling

Enables

• Event-Driven Architecture

Conflicts with

• Synchronous Chain Trap

In tension with

• Immediate Consistency

Tensions

• Asynchronous Communication / Immediate Consistency

Violated by

• Synchronous Chain Trap

Refactored by

• Message Queue
• Query Projection

Severity

• contextual

Category

• Event / Messaging / Asynchronous Architecture

Linked from

• Execution joins the halves
• The principle architecture
• Anti-patterns
• Core Modular Design
• Event / Messaging / Asynchronous Architecture
• Error Handling / Resilience
• Core Vocabulary
• Event Messaging Async
• Quality Attributes
• Severity levels
• The resolutions