Interceptors

Microservice interceptors work the same way as regular interceptors. The following example uses a manually instantiated method-scoped interceptor. As with HTTP-based applications, you can also use controller-scoped interceptors (i.e., prefix the controller class with a @UseInterceptors() decorator).

@UseInterceptors(new TransformInterceptor())
@MessagePattern({ cmd: 'sum' })
accumulate(data: number[]): number {
  return (data || []).reduce((a, b) => a + b);
}

@UseInterceptors(new TransformInterceptor())
@MessagePattern({ cmd: 'sum' })
accumulate(data) {
  return (data || []).reduce((a, b) => a + b);
}

Hint Global interceptors registered on the main HTTP application don't apply to microservices connected to a hybrid application unless you set the inheritAppConfig option. See sharing configuration.