jqserver_3.go

// Evaluate is an RPC proxy. It proxies the request to the main process and
// writes the response to o.
func (j JqServer) Evaluate(i *SomeInput, o *SomeOutput) error {
	// setup the conduit
	reqChan := make(chan RequestResponse)
	req := RequestResponse{Req: i}

	// send the request to the main process
	j.process.ReqRespChan <- reqChan
	reqChan <- req

	// receive response from the main process
	if res := <-reqChan; res.Error != nil {
         return res.Error
	}

	o = res.Response
}