/*

*

* Copyright 2017 gRPC authors.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*

*/

// Package status implements errors returned by gRPC. These errors are

// serialized and transmitted on the wire between server and client, and allow

// for additional data to be transmitted via the Details field in the status

// proto. gRPC service handlers should return an error created by this

// package, and gRPC clients should expect a corresponding error to be

// returned from the RPC call.

//

// This package upholds the invariants that a non-nil error may not

// contain an OK code, and an OK code must result in a nil error.

package status

import (

"context"

"errors"

"fmt"

spb "google.golang.org/genproto/googleapis/rpc/status"

"google.golang.org/grpc/codes"

"google.golang.org/grpc/internal/status"

)

// Status references google.golang.org/grpc/internal/status. It represents an

// RPC status code, message, and details. It is immutable and should be

// created with New, Newf, or FromProto.

// https://godoc.org/google.golang.org/grpc/internal/status

type Status = status.Status

// New returns a Status representing c and msg.

func New(c codes.Code, msg string) *Status {

return status.New(c, msg)

}

// Newf returns New(c, fmt.Sprintf(format, a...)).

func Newf(c codes.Code, format string, a ...interface{}) *Status {

return New(c, fmt.Sprintf(format, a...))

}

// Error returns an error representing c and msg. If c is OK, returns nil.

func Error(c codes.Code, msg string) error {

return New(c, msg).Err()

}

// Errorf returns Error(c, fmt.Sprintf(format, a...)).

func Errorf(c codes.Code, format string, a ...interface{}) error {

return Error(c, fmt.Sprintf(format, a...))

}

// ErrorProto returns an error representing s. If s.Code is OK, returns nil.

func ErrorProto(s *spb.Status) error {

return FromProto(s).Err()

}

// FromProto returns a Status representing s.

func FromProto(s *spb.Status) *Status {

return status.FromProto(s)

}

// FromError returns a Status representation of err.

//

// - If err was produced by this package or implements the method `GRPCStatus()

// *Status`, or if err wraps a type satisfying this, the appropriate Status is

// returned. For wrapped errors, the message returned contains the entire

// err.Error() text and not just the wrapped status.

//

// - If err is nil, a Status is returned with codes.OK and no message.

//

// - Otherwise, err is an error not compatible with this package. In this

// case, a Status is returned with codes.Unknown and err's Error() message,

// and ok is false.

func FromError(err error) (s *Status, ok bool) {

}

// Convert is a convenience function which removes the need to handle the

// boolean return value from FromError.

func Convert(err error) *Status {

s, _ := FromError(err)

return s

}

// Code returns the Code of the error if it is a Status error or if it wraps a

// Status error. If that is not the case, it returns codes.OK if err is nil, or

// codes.Unknown otherwise.

func Code(err error) codes.Code {

}

// FromContextError converts a context error or wrapped context error into a

// Status. It returns a Status with codes.OK if err is nil, or a Status with

// codes.Unknown if err is non-nil and not a context error.

func FromContextError(err error) *Status {

}