github.com/kubewharf/katalyst-core@v0.5.3/pkg/util/general/error.go (about) 1 /* 2 Copyright 2022 The Katalyst Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package general 18 19 import ( 20 "encoding/json" 21 "errors" 22 "fmt" 23 24 "google.golang.org/grpc/codes" 25 "google.golang.org/grpc/status" 26 ) 27 28 // common errors 29 var ( 30 ErrNotFound = fmt.Errorf("not found") 31 ErrKeyNotExist = errors.New("key does not exist") 32 ) 33 34 // IsUnmarshalTypeError check whether is json unmarshal type error 35 func IsUnmarshalTypeError(err error) bool { 36 if _, ok := err.(*json.UnmarshalTypeError); ok { 37 return true 38 } 39 return false 40 } 41 42 func IsErrNotFound(err error) bool { 43 return err == ErrNotFound 44 } 45 46 func IsErrKeyNotExist(err error) bool { 47 return err == ErrKeyNotExist 48 } 49 50 func IsUnimplementedError(err error) bool { 51 // Sources: 52 // https://github.com/grpc/grpc/blob/master/doc/statuscodes.md 53 // https://github.com/container-storage-interface/spec/blob/master/spec.md 54 st, ok := status.FromError(err) 55 if !ok { 56 // This is not gRPC error. The operation must have failed before gRPC 57 // method was called, otherwise we would get gRPC error. 58 // We don't know if any previous volume operation is in progress, be on the safe side. 59 return false 60 } 61 switch st.Code() { 62 case codes.Unimplemented: 63 return true 64 } 65 return false 66 }