forked from Shiloh/githaven
92 lines
3.0 KiB
Go
92 lines
3.0 KiB
Go
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// Copyright 2015 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kv
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import (
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"errors"
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"strings"
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"github.com/pingcap/go-themis"
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"github.com/pingcap/tidb/mysql"
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"github.com/pingcap/tidb/terror"
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)
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// KV error codes.
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const (
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CodeIncompatibleDBFormat terror.ErrCode = 1
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CodeNoDataForHandle terror.ErrCode = 2
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CodeKeyExists terror.ErrCode = 3
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)
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var (
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// ErrClosed is used when close an already closed txn.
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ErrClosed = errors.New("Error: Transaction already closed")
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// ErrNotExist is used when try to get an entry with an unexist key from KV store.
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ErrNotExist = errors.New("Error: key not exist")
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// ErrConditionNotMatch is used when condition is not met.
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ErrConditionNotMatch = errors.New("Error: Condition not match")
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// ErrLockConflict is used when try to lock an already locked key.
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ErrLockConflict = errors.New("Error: Lock conflict")
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// ErrLazyConditionPairsNotMatch is used when value in store differs from expect pairs.
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ErrLazyConditionPairsNotMatch = errors.New("Error: Lazy condition pairs not match")
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// ErrRetryable is used when KV store occurs RPC error or some other
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// errors which SQL layer can safely retry.
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ErrRetryable = errors.New("Error: KV error safe to retry")
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// ErrCannotSetNilValue is the error when sets an empty value.
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ErrCannotSetNilValue = errors.New("can not set nil value")
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// ErrInvalidTxn is the error when commits or rollbacks in an invalid transaction.
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ErrInvalidTxn = errors.New("invalid transaction")
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// ErrNotCommitted is the error returned by CommitVersion when this
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// transaction is not committed.
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ErrNotCommitted = errors.New("this transaction has not committed")
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// ErrKeyExists returns when key is already exist.
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ErrKeyExists = terror.ClassKV.New(CodeKeyExists, "key already exist")
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)
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func init() {
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kvMySQLErrCodes := map[terror.ErrCode]uint16{
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CodeKeyExists: mysql.ErrDupEntry,
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}
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terror.ErrClassToMySQLCodes[terror.ClassKV] = kvMySQLErrCodes
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}
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// IsRetryableError checks if the err is a fatal error and the under going operation is worth to retry.
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func IsRetryableError(err error) bool {
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if err == nil {
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return false
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}
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if terror.ErrorEqual(err, ErrRetryable) ||
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terror.ErrorEqual(err, ErrLockConflict) ||
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terror.ErrorEqual(err, ErrConditionNotMatch) ||
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terror.ErrorEqual(err, themis.ErrRetryable) ||
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// HBase exception message will tell you if you should retry or not
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strings.Contains(err.Error(), "try again later") {
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return true
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}
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return false
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}
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// IsErrNotFound checks if err is a kind of NotFound error.
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func IsErrNotFound(err error) bool {
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if terror.ErrorEqual(err, ErrNotExist) {
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return true
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}
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return false
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}
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