EvidentSource Core for Python

Core domain types for the EvidentSource event sourcing platform.

Installation

pip install evidentsource-core

Types

Events

• Event: A stored event with full metadata (id, stream, type, subject, time, data, etc.)
• ProspectiveEvent: An event before storage (for state changes)
• EventData: Binary or string event data
• BinaryEventData: Binary event payload
• StringEventData: String event payload

Selectors

• Selector: Complex event selectors (subject, type, stream combinations)
• EventSelector: Parameters for event queries

Constraints

• Constraint: Individual constraint on event sequences
• AppendCondition: Constraint to apply when committing events

Identifiers

• DatabaseName: Database name identifier
• StreamName: Stream name identifier
• EventId: Event ID identifier
• EventType: Event type identifier
• EventSubject: Event subject identifier
• StateViewName: State view name identifier
• StateChangeName: State change name identifier

State Views

• StateView: Rendered state view result
• StateViewCodec: Protocol for state view serialization

State Changes

• Command: Command received by a state change
• CommandRequest: Full command request with headers
• StateChangeDefinitionSummary: State change definition info

License

MIT OR Apache-2.0