[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/etcd/error/error.go b/vendor/github.com/coreos/etcd/error/error.go
new file mode 100644
index 0000000..b541a62
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/error/error.go
@@ -0,0 +1,163 @@
+// Copyright 2015 The etcd 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 error describes errors in etcd project. When any change happens,
+// Documentation/v2/errorcode.md needs to be updated correspondingly.
+package error
+
+import (
+ "encoding/json"
+ "fmt"
+ "net/http"
+)
+
+var errors = map[int]string{
+ // command related errors
+ EcodeKeyNotFound: "Key not found",
+ EcodeTestFailed: "Compare failed", //test and set
+ EcodeNotFile: "Not a file",
+ ecodeNoMorePeer: "Reached the max number of peers in the cluster",
+ EcodeNotDir: "Not a directory",
+ EcodeNodeExist: "Key already exists", // create
+ ecodeKeyIsPreserved: "The prefix of given key is a keyword in etcd",
+ EcodeRootROnly: "Root is read only",
+ EcodeDirNotEmpty: "Directory not empty",
+ ecodeExistingPeerAddr: "Peer address has existed",
+ EcodeUnauthorized: "The request requires user authentication",
+
+ // Post form related errors
+ ecodeValueRequired: "Value is Required in POST form",
+ EcodePrevValueRequired: "PrevValue is Required in POST form",
+ EcodeTTLNaN: "The given TTL in POST form is not a number",
+ EcodeIndexNaN: "The given index in POST form is not a number",
+ ecodeValueOrTTLRequired: "Value or TTL is required in POST form",
+ ecodeTimeoutNaN: "The given timeout in POST form is not a number",
+ ecodeNameRequired: "Name is required in POST form",
+ ecodeIndexOrValueRequired: "Index or value is required",
+ ecodeIndexValueMutex: "Index and value cannot both be specified",
+ EcodeInvalidField: "Invalid field",
+ EcodeInvalidForm: "Invalid POST form",
+ EcodeRefreshValue: "Value provided on refresh",
+ EcodeRefreshTTLRequired: "A TTL must be provided on refresh",
+
+ // raft related errors
+ EcodeRaftInternal: "Raft Internal Error",
+ EcodeLeaderElect: "During Leader Election",
+
+ // etcd related errors
+ EcodeWatcherCleared: "watcher is cleared due to etcd recovery",
+ EcodeEventIndexCleared: "The event in requested index is outdated and cleared",
+ ecodeStandbyInternal: "Standby Internal Error",
+ ecodeInvalidActiveSize: "Invalid active size",
+ ecodeInvalidRemoveDelay: "Standby remove delay",
+
+ // client related errors
+ ecodeClientInternal: "Client Internal Error",
+}
+
+var errorStatus = map[int]int{
+ EcodeKeyNotFound: http.StatusNotFound,
+ EcodeNotFile: http.StatusForbidden,
+ EcodeDirNotEmpty: http.StatusForbidden,
+ EcodeUnauthorized: http.StatusUnauthorized,
+ EcodeTestFailed: http.StatusPreconditionFailed,
+ EcodeNodeExist: http.StatusPreconditionFailed,
+ EcodeRaftInternal: http.StatusInternalServerError,
+ EcodeLeaderElect: http.StatusInternalServerError,
+}
+
+const (
+ EcodeKeyNotFound = 100
+ EcodeTestFailed = 101
+ EcodeNotFile = 102
+ ecodeNoMorePeer = 103
+ EcodeNotDir = 104
+ EcodeNodeExist = 105
+ ecodeKeyIsPreserved = 106
+ EcodeRootROnly = 107
+ EcodeDirNotEmpty = 108
+ ecodeExistingPeerAddr = 109
+ EcodeUnauthorized = 110
+
+ ecodeValueRequired = 200
+ EcodePrevValueRequired = 201
+ EcodeTTLNaN = 202
+ EcodeIndexNaN = 203
+ ecodeValueOrTTLRequired = 204
+ ecodeTimeoutNaN = 205
+ ecodeNameRequired = 206
+ ecodeIndexOrValueRequired = 207
+ ecodeIndexValueMutex = 208
+ EcodeInvalidField = 209
+ EcodeInvalidForm = 210
+ EcodeRefreshValue = 211
+ EcodeRefreshTTLRequired = 212
+
+ EcodeRaftInternal = 300
+ EcodeLeaderElect = 301
+
+ EcodeWatcherCleared = 400
+ EcodeEventIndexCleared = 401
+ ecodeStandbyInternal = 402
+ ecodeInvalidActiveSize = 403
+ ecodeInvalidRemoveDelay = 404
+
+ ecodeClientInternal = 500
+)
+
+type Error struct {
+ ErrorCode int `json:"errorCode"`
+ Message string `json:"message"`
+ Cause string `json:"cause,omitempty"`
+ Index uint64 `json:"index"`
+}
+
+func NewRequestError(errorCode int, cause string) *Error {
+ return NewError(errorCode, cause, 0)
+}
+
+func NewError(errorCode int, cause string, index uint64) *Error {
+ return &Error{
+ ErrorCode: errorCode,
+ Message: errors[errorCode],
+ Cause: cause,
+ Index: index,
+ }
+}
+
+// Error is for the error interface
+func (e Error) Error() string {
+ return e.Message + " (" + e.Cause + ")"
+}
+
+func (e Error) toJsonString() string {
+ b, _ := json.Marshal(e)
+ return string(b)
+}
+
+func (e Error) StatusCode() int {
+ status, ok := errorStatus[e.ErrorCode]
+ if !ok {
+ status = http.StatusBadRequest
+ }
+ return status
+}
+
+func (e Error) WriteTo(w http.ResponseWriter) error {
+ w.Header().Add("X-Etcd-Index", fmt.Sprint(e.Index))
+ w.Header().Set("Content-Type", "application/json")
+ w.WriteHeader(e.StatusCode())
+ _, err := w.Write([]byte(e.toJsonString() + "\n"))
+ return err
+}