120 lines
5.1 KiB
Go
120 lines
5.1 KiB
Go
/*
|
|
* Copyright 2017 Dgraph Labs, Inc. and Contributors
|
|
*
|
|
* 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 badger
|
|
|
|
import (
|
|
"math"
|
|
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
const (
|
|
// ValueThresholdLimit is the maximum permissible value of opt.ValueThreshold.
|
|
ValueThresholdLimit = math.MaxUint16 - 16 + 1
|
|
)
|
|
|
|
var (
|
|
// ErrValueLogSize is returned when opt.ValueLogFileSize option is not within the valid
|
|
// range.
|
|
ErrValueLogSize = errors.New("Invalid ValueLogFileSize, must be between 1MB and 2GB")
|
|
|
|
// ErrValueThreshold is returned when ValueThreshold is set to a value close to or greater than
|
|
// uint16.
|
|
ErrValueThreshold = errors.Errorf(
|
|
"Invalid ValueThreshold, must be less than %d", ValueThresholdLimit)
|
|
|
|
// ErrKeyNotFound is returned when key isn't found on a txn.Get.
|
|
ErrKeyNotFound = errors.New("Key not found")
|
|
|
|
// ErrTxnTooBig is returned if too many writes are fit into a single transaction.
|
|
ErrTxnTooBig = errors.New("Txn is too big to fit into one request")
|
|
|
|
// ErrConflict is returned when a transaction conflicts with another transaction. This can
|
|
// happen if the read rows had been updated concurrently by another transaction.
|
|
ErrConflict = errors.New("Transaction Conflict. Please retry")
|
|
|
|
// ErrReadOnlyTxn is returned if an update function is called on a read-only transaction.
|
|
ErrReadOnlyTxn = errors.New("No sets or deletes are allowed in a read-only transaction")
|
|
|
|
// ErrDiscardedTxn is returned if a previously discarded transaction is re-used.
|
|
ErrDiscardedTxn = errors.New("This transaction has been discarded. Create a new one")
|
|
|
|
// ErrEmptyKey is returned if an empty key is passed on an update function.
|
|
ErrEmptyKey = errors.New("Key cannot be empty")
|
|
|
|
// ErrInvalidKey is returned if the key has a special !badger! prefix,
|
|
// reserved for internal usage.
|
|
ErrInvalidKey = errors.New("Key is using a reserved !badger! prefix")
|
|
|
|
// ErrRetry is returned when a log file containing the value is not found.
|
|
// This usually indicates that it may have been garbage collected, and the
|
|
// operation needs to be retried.
|
|
ErrRetry = errors.New("Unable to find log file. Please retry")
|
|
|
|
// ErrThresholdZero is returned if threshold is set to zero, and value log GC is called.
|
|
// In such a case, GC can't be run.
|
|
ErrThresholdZero = errors.New(
|
|
"Value log GC can't run because threshold is set to zero")
|
|
|
|
// ErrNoRewrite is returned if a call for value log GC doesn't result in a log file rewrite.
|
|
ErrNoRewrite = errors.New(
|
|
"Value log GC attempt didn't result in any cleanup")
|
|
|
|
// ErrRejected is returned if a value log GC is called either while another GC is running, or
|
|
// after DB::Close has been called.
|
|
ErrRejected = errors.New("Value log GC request rejected")
|
|
|
|
// ErrInvalidRequest is returned if the user request is invalid.
|
|
ErrInvalidRequest = errors.New("Invalid request")
|
|
|
|
// ErrManagedTxn is returned if the user tries to use an API which isn't
|
|
// allowed due to external management of transactions, when using ManagedDB.
|
|
ErrManagedTxn = errors.New(
|
|
"Invalid API request. Not allowed to perform this action using ManagedDB")
|
|
|
|
// ErrInvalidDump if a data dump made previously cannot be loaded into the database.
|
|
ErrInvalidDump = errors.New("Data dump cannot be read")
|
|
|
|
// ErrZeroBandwidth is returned if the user passes in zero bandwidth for sequence.
|
|
ErrZeroBandwidth = errors.New("Bandwidth must be greater than zero")
|
|
|
|
// ErrInvalidLoadingMode is returned when opt.ValueLogLoadingMode option is not
|
|
// within the valid range
|
|
ErrInvalidLoadingMode = errors.New("Invalid ValueLogLoadingMode, must be FileIO or MemoryMap")
|
|
|
|
// ErrReplayNeeded is returned when opt.ReadOnly is set but the
|
|
// database requires a value log replay.
|
|
ErrReplayNeeded = errors.New("Database was not properly closed, cannot open read-only")
|
|
|
|
// ErrWindowsNotSupported is returned when opt.ReadOnly is used on Windows
|
|
ErrWindowsNotSupported = errors.New("Read-only mode is not supported on Windows")
|
|
|
|
// ErrPlan9NotSupported is returned when opt.ReadOnly is used on Plan 9
|
|
ErrPlan9NotSupported = errors.New("Read-only mode is not supported on Plan 9")
|
|
|
|
// ErrTruncateNeeded is returned when the value log gets corrupt, and requires truncation of
|
|
// corrupt data to allow Badger to run properly.
|
|
ErrTruncateNeeded = errors.New(
|
|
"Value log truncate required to run DB. This might result in data loss")
|
|
|
|
// ErrBlockedWrites is returned if the user called DropAll. During the process of dropping all
|
|
// data from Badger, we stop accepting new writes, by returning this error.
|
|
ErrBlockedWrites = errors.New("Writes are blocked, possibly due to DropAll or Close")
|
|
|
|
// ErrNilCallback is returned when subscriber's callback is nil.
|
|
ErrNilCallback = errors.New("Callback cannot be nil")
|
|
)
|