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store.go
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store.go
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// Copyright 2017 Microsoft. All rights reserved.
// MIT License
package store
import (
"fmt"
"time"
)
// KeyValueStore represents a persistent store of (key,value) pairs.
type KeyValueStore interface {
Exists() bool
Read(key string, value interface{}) error
Write(key string, value interface{}) error
Flush() error
Lock(timeout time.Duration) error
Unlock() error
GetModificationTime() (time.Time, error)
Remove()
}
var (
// Errors returned by KeyValueStore methods.
ErrKeyNotFound = fmt.Errorf("key not found")
ErrStoreLocked = fmt.Errorf("store is already locked")
ErrStoreNotLocked = fmt.Errorf("store is not locked")
ErrStoreEmpty = fmt.Errorf("store is empty")
ErrTimeoutLockingStore = fmt.Errorf("timed out locking store")
ErrNonBlockingLockIsAlreadyLocked = fmt.Errorf("attempted to perform non-blocking lock on an already locked store")
)