@dolittle/sdk.projections/ProjectionCallback.ts

Dolittle is a decentralized, distributed, event-driven microservice platform built to harness the power of events.

// Copyright (c) Dolittle. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

import { DeleteReadModelInstance } from './DeleteReadModelInstance';
import { ProjectionContext } from './ProjectionContext';

/**
 * Represents the callback for a projection on() method.
 */
export type ProjectionCallback<T, TEvent = any> = (readModel: T, event: TEvent, context: ProjectionContext) => T | DeleteReadModelInstance | Promise<T | DeleteReadModelInstance>;