43 lines
1.5 KiB
Go
43 lines
1.5 KiB
Go
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package cache
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import "errors"
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var ErrNoSuchKey = errors.New("there's no such key existing in cache")
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type Cache interface {
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// Set puts key and value into cache.
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// First parameter for extra should be time.Time object denoting expected survival time.
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// If survival time equals 0 or less, the key will always be survival.
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Set(key string, value bool, extra ...interface{}) error
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// Get returns result for key,
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// If there's no such key existing in cache,
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// ErrNoSuchKey will be returned.
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Get(key string) (bool, error)
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// Delete will remove the specific key in cache.
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// If there's no such key existing in cache,
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// ErrNoSuchKey will be returned.
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Delete(key string) error
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// Clear deletes all the items stored in cache.
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Clear() error
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}
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