Function: OnQuery()

function OnQuery(type: QueryType): MethodDecorator;

Defined in: src/wirestate-core/queries/on-query.ts:38

Marks a service method as a query handler.

Parameters

Parameter	Type	Description
type	QueryType	Query token.

Returns

MethodDecorator

Method decorator.

Remarks

The handler registers when the service activates and unregisters when the service deactivates.

Queries answer reads. If several handlers use the same token, the newest one answers. Think stack of sticky notes: read the top note first.

Example

import { Injectable, OnQuery } from "@wirestate/core";

@Injectable()
class UserProfileService {
  @OnQuery("GET_USER_AVATAR")
  private async onGetUserAvatar(userId: string): Promise<string> {
    const user: User = await this.userRepository.findById(userId);

    return user.avatarUrl;
  }
}