333ff22e9a
Embrace the future and use Go 1.6's vendor support via Godep. Go 1.5 users should `export GO15VENDOREXPERIMENT=1`
44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
package msgpackrpc
|
|
|
|
import (
|
|
"errors"
|
|
"net/rpc"
|
|
"sync/atomic"
|
|
|
|
"github.com/hashicorp/go-multierror"
|
|
)
|
|
|
|
var (
|
|
// nextCallSeq is used to assign a unique sequence number
|
|
// to each call made with CallWithCodec
|
|
nextCallSeq uint64
|
|
)
|
|
|
|
// CallWithCodec is used to perform the same actions as rpc.Client.Call but
|
|
// in a much cheaper way. It assumes the underlying connection is not being
|
|
// shared with multiple concurrent RPCs. The request/response must be syncronous.
|
|
func CallWithCodec(cc rpc.ClientCodec, method string, args interface{}, resp interface{}) error {
|
|
request := rpc.Request{
|
|
Seq: atomic.AddUint64(&nextCallSeq, 1),
|
|
ServiceMethod: method,
|
|
}
|
|
if err := cc.WriteRequest(&request, args); err != nil {
|
|
return err
|
|
}
|
|
var response rpc.Response
|
|
if err := cc.ReadResponseHeader(&response); err != nil {
|
|
return err
|
|
}
|
|
if response.Error != "" {
|
|
err := errors.New(response.Error)
|
|
if readErr := cc.ReadResponseBody(nil); readErr != nil {
|
|
err = multierror.Append(err, readErr)
|
|
}
|
|
return rpc.ServerError(err.Error())
|
|
}
|
|
if err := cc.ReadResponseBody(resp); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|