distribution/storagedriver/ipc/ipc.go
Brian Bland b522fbd675 Removes WrapReader boilerplate for updates to libchan
libchan now supports io.ReadCloser and io.WriteCloser, so we don't need
io.ReadWriteCloser wrapping
2014-10-31 11:50:02 -07:00

72 lines
1.5 KiB
Go

package ipc
import (
"fmt"
"io"
"reflect"
"github.com/docker/libchan"
)
// Request defines a remote method call request
// A return value struct is to be sent over the ResponseChannel
type Request struct {
Type string
Parameters map[string]interface{}
ResponseChannel libchan.Sender
}
type responseError struct {
Type string
Message string
}
// ResponseError wraps an error in a serializable struct containing the error's type and message
func ResponseError(err error) *responseError {
if err == nil {
return nil
}
return &responseError{
Type: reflect.TypeOf(err).String(),
Message: err.Error(),
}
}
func (err *responseError) Error() string {
return fmt.Sprintf("%s: %s", err.Type, err.Message)
}
// IPC method call response object definitions
// ReadStreamResponse is a response for a ReadStream request
type ReadStreamResponse struct {
Reader io.ReadCloser
Error *responseError
}
// WriteStreamResponse is a response for a WriteStream request
type WriteStreamResponse struct {
Error *responseError
}
// ResumeWritePositionResponse is a response for a ResumeWritePosition request
type ResumeWritePositionResponse struct {
Position uint64
Error *responseError
}
// ListResponse is a response for a List request
type ListResponse struct {
Keys []string
Error *responseError
}
// MoveResponse is a response for a Move request
type MoveResponse struct {
Error *responseError
}
// DeleteResponse is a response for a Delete request
type DeleteResponse struct {
Error *responseError
}