Interface IQuery<TResponse>

Namespace

SimpleMediator

Assembly

SimpleMediator.dll

Represents an immutable query that produces a result.

public interface IQuery<out TResponse> : IRequest<TResponse>

Type Parameters

TResponse

Type produced by the handler when the query is resolved.

Examples

public sealed record GetAgendaById(Guid AgendaId) : IQuery<Option<AgendaReadModel>>;

public sealed class GetAgendaHandler : IQueryHandler<GetAgendaById, Option<AgendaReadModel>>
{
    public Task<Option<AgendaReadModel>> Handle(GetAgendaById request, CancellationToken cancellationToken)
    {
        // Look up the record and project it to the read model.
    }
}

Remarks

Queries should avoid mutating state. This pattern encourages pure responses that are easy to cache.