Glossary

Core concepts¶

Aggregate : A business entity with identity, versioning, and invariants. Subclass Document to create one; add the AggregateRoot mixin when you need domain events.

Adapter : A concrete implementation of a port for a specific backend — PostgresDocumentAdapter implements the document port for PostgreSQL.

Execution context : The runtime object that resolves ports to adapters on demand. Handlers receive it and request capabilities without knowing which adapter backs them.

Operation : A single business action — create a user, list orders, delete a document. Operations are registered in an operation registry and resolved at runtime.

Operation registry : The frozen catalog mapping operation names to their handlers and hooks. Built with build_document_registry() and locked with freeze().

Port : A contract describing a capability the application needs — storage, cache, search, messaging. Ports live in the application layer; adapters implement them in infrastructure.

Specification (Spec) : The logical name ("users") that binds a model to its operations and adapters — DocumentSpec, SearchSpec, CacheSpec, and so on.

Spec types¶

DocumentSpec : Declares a document aggregate with CRUD operations. Binds domain model, create command, and read model to a logical name.

SearchSpec : Declares a search index for full-text or structured queries over documents.

CacheSpec : Declares a cache layer for read-through or write-through caching.

QueueSpec : Declares a message queue for async task dispatch.

StreamSpec : Declares a pub/sub stream for event distribution.

GraphSpec : Declares a graph data model for relationship queries.

Model types¶

Domain model : The business entity with behavior and invariants. Subclass Document for identity, revision, and timestamps.

Create command : The frozen input for POST operations. Use BaseDTO (the CreateDocumentCmd alias is deprecated).

Update command : Partial update payload for PATCH operations. Typically a BaseDTO with optional fields.

Read model : The frozen projection returned from GET operations. May include computed fields not stored in the domain model.

Domain event : A record of something that happened in the domain. Subclass DomainEvent for event_id, occurred_at, and payload.

Runtime and wiring¶

DepsModule : A module that registers adapters for specs. Examples: PostgresDepsModule, RedisDepsModule, MockDepsModule.

DepsRegistry : The container holding all registered deps modules and their wiring.

ExecutionRuntime : The top-level runtime that manages lifecycle, builds contexts, and coordinates shutdown.

Lifecycle plan : The dependency graph that determines startup and shutdown order for adapters.

Route (wiring) : The mapping from a spec name to its adapter configuration. Not to be confused with HTTP routes.

Transaction route : A transactional boundary that groups operations. Configured per-request or per-saga step.

Identity and tenancy¶

AuthnIdentity : The verified identity of a request — who is making the call.

AuthzScope : The permissions associated with an identity — what they're allowed to do.

TenantIdentity : The tenant context bound to a request. Determines data isolation strategy.

Tenant tier : The isolation level for a tenant: tagged (marker column), namespace (schema/prefix), or dedicated (separate instance).

Patterns¶

CQRS : Command Query Responsibility Segregation. Forze's query/command port split follows this pattern — writes go through command ports, reads through query ports.

OCC : Optimistic Concurrency Control. Forze uses revision numbers to detect concurrent modifications.

Outbox : A transactional pattern where events are written to a local table in the same transaction as state changes, then relayed to external systems.

Inbox : The receiving side of outbox — deduplicated message processing with exactly-once semantics.

Saga : A sequence of operations across aggregates or services, with compensation logic for rollback.