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mkvdb.go
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mkvdb.go
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// Copyright 2018, Goomba project Authors. All rights reserved.
//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with this
// work for additional information regarding copyright ownership. The ASF
// licenses this file to you 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 mkvdb
import (
"sync"
)
// MKVDB ...
type MKVDB struct {
// mu Mutex protects data structures below.
mu sync.Mutex
// store is the Set underlying store of values.
store map[interface{}]interface{}
}
// New Database
func New() *MKVDB {
db := &MKVDB{
store: make(map[interface{}]interface{}),
}
return db
}
// Put add an item into the db.
func (db *MKVDB) Put(key interface{}, value interface{}) {
db.mu.Lock()
defer db.mu.Unlock()
db.store[key] = value
}
// Get returns the value of a key from the db.
func (db *MKVDB) Get(key interface{}) (value interface{}, found bool) {
db.mu.Lock()
defer db.mu.Unlock()
value, found = db.store[key]
return value, found
}
// Remove deletes a key-value pair from the db.
//
// If a key is not found in the map it doesn't fails, just does nothing.
func (db *MKVDB) Remove(key interface{}) {
db.mu.Lock()
defer db.mu.Unlock()
// Check key exists
if _, found := db.store[key]; !found {
return
}
// Remove the value from the store
delete(db.store, key)
}
// Empty return if the map in empty or not.
func (db *MKVDB) Empty() bool {
db.mu.Lock()
defer db.mu.Unlock()
return len(db.store) == 0
}