# Dynamic Binding

> A mechanism that selects the implementation behind an interface at runtime, from configuration or a registry, so the choice is made at bootstrap or first use rather than fixed in code.

Record: `architecture:dynamic-binding`
Kind: mechanism
Layer: [Extensibility Core](https://banes-lab.com/records/layer/extensibility-core.md)
Severity: contextual
Scope: runtime, interface, plugin, module, service
Aliases: Late Binding, Runtime Binding
Canonical: https://banes-lab.com/ontology#architecture-dynamic-binding

Listed in [Architecture principles](https://banes-lab.com/api/records/architecture.md), after [Service Discovery](https://banes-lab.com/records/architecture/service-discovery.md) and before [Dynamic Dispatch](https://banes-lab.com/records/architecture/dynamic-dispatch.md).

## Repair

- Refactored by: Introduce Factory, [Registry](https://banes-lab.com/records/lexicon/registry.md), Strategy
- Detected by: hardcoded implementation selection
- Violated by: fixed concrete binding where runtime selection required
- Measured by: runtime binding coverage
- Enforced by: integration tests

## Requires

- [Abstraction](https://banes-lab.com/records/architecture/abstraction.md)
- [Runtime Resolution](https://banes-lab.com/records/lexicon/runtime-resolution.md)

## Reinforces

- [Polymorphism](https://banes-lab.com/records/architecture/polymorphism.md)
- [Extensibility](https://banes-lab.com/records/lexicon/extensibility.md)
- [Runtime Extensibility](https://banes-lab.com/records/architecture/runtime-extensibility.md)

## Enables

- [Strategy Swap](https://banes-lab.com/records/lexicon/strategy-swap.md)
- [Deferred Implementation Choice](https://banes-lab.com/records/lexicon/deferred-implementation-choice.md)

## Conflicts with

- [Compile-Time Binding](https://banes-lab.com/records/lexicon/compile-time-binding.md)

## In tension with

- [Static Safety](https://banes-lab.com/records/lexicon/static-safety.md)
- [Predictability](https://banes-lab.com/records/architecture/predictability.md)
- [Debugging](https://banes-lab.com/records/lexicon/debugging.md)

## Tensions

- [Dynamic Binding / Static Safety](https://banes-lab.com/records/tension/dynamic-binding-static-safety.md)
- [Dynamic Binding / Predictability](https://banes-lab.com/records/tension/dynamic-binding-predictability.md)
- [Dynamic Binding / Debugging](https://banes-lab.com/records/tension/debugging-dynamic-binding.md)

## Severity

- [contextual](https://banes-lab.com/records/vocabulary/severity-contextual.md)

## Category

- [Runtime Discovery / Dynamic Binding](https://banes-lab.com/records/architecture-category/runtime-discovery-dynamic-binding.md)

## Enabled by

- [Capability Declaration](https://banes-lab.com/records/architecture/capability-declaration.md)
- [Reflection](https://banes-lab.com/records/architecture/reflection.md)

## Reinforced by

- [Service Registry](https://banes-lab.com/records/architecture/service-registry.md)

## Linked from

- [Runtime Discovery / Dynamic Binding](https://banes-lab.com/ontology/principles/architecture-category-runtime-discovery-dynamic-binding.md)
- [Correctness / Determinism / Verification](https://banes-lab.com/ontology/principles/architecture-category-correctness-determinism-verification.md)
- [Core Modular Design](https://banes-lab.com/ontology/principles/architecture-category-core-modular-design.md)
- [SOLID / Object-Oriented Design](https://banes-lab.com/ontology/principles/architecture-category-solid-object-oriented-design.md)
- [Metadata / Self-Description / Declarative Systems](https://banes-lab.com/ontology/principles/architecture-category-metadata-self-description-declarative-systems.md)
- [Metaprogramming / Language-Oriented Architecture](https://banes-lab.com/ontology/principles/architecture-category-metaprogramming-language-oriented-architecture.md)
- [Plugin / Extensibility / IoC](https://banes-lab.com/ontology/principles/architecture-category-plugin-extensibility-ioc.md)
- [Core Modular Design](https://banes-lab.com/ontology/lexicon/lexicon-category-core-modular-design.md)
- [Core Vocabulary](https://banes-lab.com/ontology/lexicon/lexicon-category-core-vocabulary.md)
- [Quality Attributes](https://banes-lab.com/ontology/lexicon/lexicon-category-quality-attributes.md)
- [Runtime Discovery / Dynamic Binding](https://banes-lab.com/ontology/lexicon/lexicon-category-runtime-discovery-dynamic-binding.md)
- [Severity levels](https://banes-lab.com/ontology/schema/the-vocabulary-severity.md)
- [The resolutions](https://banes-lab.com/ontology/schema/the-resolutions.md)