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// Copyright 2021 The casbin Authors. All Rights Reserved.
//
// 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 cache
import "errors"
var ErrNoSuchKey = errors.New("there's no such key existing in cache")
type Cache interface {
// Set puts key and value into cache.
// First parameter for extra should be time.Time object denoting expected survival time.
// If survival time equals 0 or less, the key will always be survival.
Set(key string, value bool, extra ...interface{}) error
// Get returns result for key,
// If there's no such key existing in cache,
// ErrNoSuchKey will be returned.
Get(key string) (bool, error)
// Delete will remove the specific key in cache.
// If there's no such key existing in cache,
// ErrNoSuchKey will be returned.
Delete(key string) error
// Clear deletes all the items stored in cache.
Clear() error
}
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