ProjectionBuilder
@rotorsoft/act-root / act/src / ProjectionBuilder
Type Alias: ProjectionBuilder<TEvents, TTarget>
ProjectionBuilder<
TEvents,TTarget> =object&TTargetextendsstring?object:object
Defined in: libs/act/src/builders/projection-builder.ts:63
Fluent builder interface for composing projections.
When a static target is provided via projection("target"), the builder
exposes a .batch() method for registering a batch handler that processes
all events in a single call.
Type Declaration
build
build: () =>
Projection<TEvents>
Builds and returns the Projection data structure.
Returns
Projection<TEvents>
events
readonlyevents:EventRegister<TEvents>
The registered event schemas and their reaction maps.
on
on: <
TKey,TData>(entry) =>object
Begins defining a projection handler for a specific event.
Pass a { EventName: schema } record — use shorthand { EventName }
when the variable name matches the event name. The key becomes the
event name, the value the Zod schema.
Type Parameters
TKey
TKey extends string
TData
TData extends Schema
Parameters
entry
EventEntry<TKey, TData>
Returns
object
do
do: (
handler) =>DoResult<TEvents,TKey,TData,TTarget>
Parameters
handler
(event, stream) => Promise<void>
Returns
DoResult<TEvents, TKey, TData, TTarget>
Type Parameters
TEvents
TEvents extends Schemas
Event schemas
TTarget
TTarget extends string | undefined = undefined
Static target string or undefined