Add pushover notifications, this should be a super basic MVP

vendor/github.com/dgraph-io/badger/errors.go

@@ -0,0 +1,120 @@
+/*
+ * 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")
+)