121 lines
5.1 KiB
Go
121 lines
5.1 KiB
Go
/*
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* Copyright 2017 Dgraph Labs, Inc. and Contributors
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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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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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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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*/
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package badger
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import (
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"math"
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"github.com/pkg/errors"
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)
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const (
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// ValueThresholdLimit is the maximum permissible value of opt.ValueThreshold.
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ValueThresholdLimit = math.MaxUint16 - 16 + 1
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)
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var (
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// ErrValueLogSize is returned when opt.ValueLogFileSize option is not within the valid
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// range.
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ErrValueLogSize = errors.New("Invalid ValueLogFileSize, must be between 1MB and 2GB")
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// ErrValueThreshold is returned when ValueThreshold is set to a value close to or greater than
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// uint16.
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ErrValueThreshold = errors.Errorf(
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"Invalid ValueThreshold, must be less than %d", ValueThresholdLimit)
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// ErrKeyNotFound is returned when key isn't found on a txn.Get.
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ErrKeyNotFound = errors.New("Key not found")
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// ErrTxnTooBig is returned if too many writes are fit into a single transaction.
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ErrTxnTooBig = errors.New("Txn is too big to fit into one request")
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// ErrConflict is returned when a transaction conflicts with another transaction. This can
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// happen if the read rows had been updated concurrently by another transaction.
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ErrConflict = errors.New("Transaction Conflict. Please retry")
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// ErrReadOnlyTxn is returned if an update function is called on a read-only transaction.
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ErrReadOnlyTxn = errors.New("No sets or deletes are allowed in a read-only transaction")
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// ErrDiscardedTxn is returned if a previously discarded transaction is re-used.
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ErrDiscardedTxn = errors.New("This transaction has been discarded. Create a new one")
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// ErrEmptyKey is returned if an empty key is passed on an update function.
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ErrEmptyKey = errors.New("Key cannot be empty")
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// ErrInvalidKey is returned if the key has a special !badger! prefix,
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// reserved for internal usage.
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ErrInvalidKey = errors.New("Key is using a reserved !badger! prefix")
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// ErrRetry is returned when a log file containing the value is not found.
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// This usually indicates that it may have been garbage collected, and the
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// operation needs to be retried.
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ErrRetry = errors.New("Unable to find log file. Please retry")
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// ErrThresholdZero is returned if threshold is set to zero, and value log GC is called.
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// In such a case, GC can't be run.
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ErrThresholdZero = errors.New(
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"Value log GC can't run because threshold is set to zero")
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// ErrNoRewrite is returned if a call for value log GC doesn't result in a log file rewrite.
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ErrNoRewrite = errors.New(
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"Value log GC attempt didn't result in any cleanup")
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// ErrRejected is returned if a value log GC is called either while another GC is running, or
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// after DB::Close has been called.
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ErrRejected = errors.New("Value log GC request rejected")
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// ErrInvalidRequest is returned if the user request is invalid.
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ErrInvalidRequest = errors.New("Invalid request")
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// ErrManagedTxn is returned if the user tries to use an API which isn't
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// allowed due to external management of transactions, when using ManagedDB.
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ErrManagedTxn = errors.New(
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"Invalid API request. Not allowed to perform this action using ManagedDB")
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// ErrInvalidDump if a data dump made previously cannot be loaded into the database.
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ErrInvalidDump = errors.New("Data dump cannot be read")
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// ErrZeroBandwidth is returned if the user passes in zero bandwidth for sequence.
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ErrZeroBandwidth = errors.New("Bandwidth must be greater than zero")
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// ErrInvalidLoadingMode is returned when opt.ValueLogLoadingMode option is not
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// within the valid range
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ErrInvalidLoadingMode = errors.New("Invalid ValueLogLoadingMode, must be FileIO or MemoryMap")
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// ErrReplayNeeded is returned when opt.ReadOnly is set but the
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// database requires a value log replay.
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ErrReplayNeeded = errors.New("Database was not properly closed, cannot open read-only")
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// ErrWindowsNotSupported is returned when opt.ReadOnly is used on Windows
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ErrWindowsNotSupported = errors.New("Read-only mode is not supported on Windows")
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// ErrPlan9NotSupported is returned when opt.ReadOnly is used on Plan 9
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ErrPlan9NotSupported = errors.New("Read-only mode is not supported on Plan 9")
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// ErrTruncateNeeded is returned when the value log gets corrupt, and requires truncation of
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// corrupt data to allow Badger to run properly.
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ErrTruncateNeeded = errors.New(
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"Value log truncate required to run DB. This might result in data loss")
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// ErrBlockedWrites is returned if the user called DropAll. During the process of dropping all
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// data from Badger, we stop accepting new writes, by returning this error.
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ErrBlockedWrites = errors.New("Writes are blocked, possibly due to DropAll or Close")
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// ErrNilCallback is returned when subscriber's callback is nil.
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ErrNilCallback = errors.New("Callback cannot be nil")
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)
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