cqrs-eda/dist/queries/decorators.js

Lightweight CQRS and Event-Driven Architecture library using TypeScript decorators, handlers and typings. Perfect for scalable event-driven apps.

const queryRegistry = new Map();
/**
 * Decorator to register a class as a Query handler under a unique name.
 *
 * @param name Unique identifier for the query.
 * @throws Error if a query with the given name is already registered.
 *
 * @example
 * ```ts
 * @Query("GET_USER")
 * export class GetUserQuery implements IQuery<{ id: number }, User> {
 *   async execute(params) { ... }
 * }
 * ```
 */
export function Query(name) {
    return function (target) {
        if (queryRegistry.has(name)) {
            throw new Error(`Query with name "${name}" is already registered.`);
        }
        queryRegistry.set(name, target);
    };
}
export function getQueryRegistry() {
    return queryRegistry;
}