mirror of https://github.com/go-gitea/gitea.git
92 lines
3.0 KiB
Go
92 lines
3.0 KiB
Go
|
// Copyright 2015 PingCAP, 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,
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package kv
|
||
|
|
|
||
|
|
import (
|
||
|
|
"errors"
|
||
|
|
"strings"
|
||
|
|
|
||
|
|
"github.com/pingcap/go-themis"
|
||
|
|
"github.com/pingcap/tidb/mysql"
|
||
|
|
"github.com/pingcap/tidb/terror"
|
||
|
|
)
|
||
|
|
|
||
|
|
// KV error codes.
|
||
|
|
const (
|
||
|
|
CodeIncompatibleDBFormat terror.ErrCode = 1
|
||
|
|
CodeNoDataForHandle terror.ErrCode = 2
|
||
|
|
CodeKeyExists terror.ErrCode = 3
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
// ErrClosed is used when close an already closed txn.
|
||
|
|
ErrClosed = errors.New("Error: Transaction already closed")
|
||
|
|
// ErrNotExist is used when try to get an entry with an unexist key from KV store.
|
||
|
|
ErrNotExist = errors.New("Error: key not exist")
|
||
|
|
// ErrConditionNotMatch is used when condition is not met.
|
||
|
|
ErrConditionNotMatch = errors.New("Error: Condition not match")
|
||
|
|
// ErrLockConflict is used when try to lock an already locked key.
|
||
|
|
ErrLockConflict = errors.New("Error: Lock conflict")
|
||
|
|
// ErrLazyConditionPairsNotMatch is used when value in store differs from expect pairs.
|
||
|
|
ErrLazyConditionPairsNotMatch = errors.New("Error: Lazy condition pairs not match")
|
||
|
|
// ErrRetryable is used when KV store occurs RPC error or some other
|
||
|
|
// errors which SQL layer can safely retry.
|
||
|
|
ErrRetryable = errors.New("Error: KV error safe to retry")
|
||
|
|
// ErrCannotSetNilValue is the error when sets an empty value.
|
||
|
|
ErrCannotSetNilValue = errors.New("can not set nil value")
|
||
|
|
// ErrInvalidTxn is the error when commits or rollbacks in an invalid transaction.
|
||
|
|
ErrInvalidTxn = errors.New("invalid transaction")
|
||
|
|
|
||
|
|
// ErrNotCommitted is the error returned by CommitVersion when this
|
||
|
|
// transaction is not committed.
|
||
|
|
ErrNotCommitted = errors.New("this transaction has not committed")
|
||
|
|
|
||
|
|
// ErrKeyExists returns when key is already exist.
|
||
|
|
ErrKeyExists = terror.ClassKV.New(CodeKeyExists, "key already exist")
|
||
|
|
)
|
||
|
|
|
||
|
|
func init() {
|
||
|
|
kvMySQLErrCodes := map[terror.ErrCode]uint16{
|
||
|
|
CodeKeyExists: mysql.ErrDupEntry,
|
||
|
|
}
|
||
|
|
terror.ErrClassToMySQLCodes[terror.ClassKV] = kvMySQLErrCodes
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsRetryableError checks if the err is a fatal error and the under going operation is worth to retry.
|
||
|
|
func IsRetryableError(err error) bool {
|
||
|
|
if err == nil {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
if terror.ErrorEqual(err, ErrRetryable) ||
|
||
|
|
terror.ErrorEqual(err, ErrLockConflict) ||
|
||
|
|
terror.ErrorEqual(err, ErrConditionNotMatch) ||
|
||
|
|
terror.ErrorEqual(err, themis.ErrRetryable) ||
|
||
|
|
// HBase exception message will tell you if you should retry or not
|
||
|
|
strings.Contains(err.Error(), "try again later") {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsErrNotFound checks if err is a kind of NotFound error.
|
||
|
|
func IsErrNotFound(err error) bool {
|
||
|
|
if terror.ErrorEqual(err, ErrNotExist) {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
return false
|
||
|
|
}
|