swh:1:snp:8a1bf80ec89c62a71cdcaaf0c2f9145695a5340a
Tip revision: 221abdcb3b755b36d1e7d70149f6de3450351619 authored by Brandon Philips on 18 December 2014, 18:27:29 UTC
version: bump to v2.0.0-rc.1
version: bump to v2.0.0-rc.1
Tip revision: 221abdc
error.go
/*
Copyright 2014 CoreOS, Inc.
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
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
EcodeRootROnly: "Root is read only",
EcodeKeyIsPreserved: "The prefix of given key is a keyword in etcd",
EcodeDirNotEmpty: "Directory not empty",
EcodeExistingPeerAddr: "Peer address has existed",
// 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",
// 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EcodeEventIndexCleared: "The event in requested index is outdated and cleared",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,
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
EcodeValueRequired = 200
EcodePrevValueRequired = 201
EcodeTTLNaN = 202
EcodeIndexNaN = 203
EcodeValueOrTTLRequired = 204
EcodeTimeoutNaN = 205
EcodeNameRequired = 206
EcodeIndexOrValueRequired = 207
EcodeIndexValueMutex = 208
EcodeInvalidField = 209
EcodeInvalidForm = 210
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,
}
}
func Message(code int) string {
return errors[code]
}
// Only for 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) {
w.Header().Add("X-Etcd-Index", fmt.Sprint(e.Index))
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(e.statusCode())
fmt.Fprintln(w, e.toJsonString())
}