| /* |
| * 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 org.apache.tuweni.kv |
| |
| import kotlinx.coroutines.Dispatchers |
| import kotlin.coroutines.CoroutineContext |
| |
| /** |
| * A key-value store backed by an in-memory Map. |
| * |
| * @param map The backing map for this store. |
| * @return A key-value store. |
| * @constructor Open an in-memory key-value store. |
| */ |
| class MapKeyValueStore<K, V> |
| constructor( |
| private val map: MutableMap<K, V> = HashMap(), |
| override val coroutineContext: CoroutineContext = Dispatchers.IO |
| ) : KeyValueStore<K, V> { |
| |
| companion object { |
| /** |
| * Open an in-memory key-value store. |
| * |
| * This store will use a [java.util.HashMap] as a backing store. |
| * |
| * @return A key-value store. |
| */ |
| @JvmStatic |
| fun <K, V> open() = MapKeyValueStore<K, V>() |
| |
| /** |
| * Open an in-memory key-value store. |
| * |
| * @param map The backing map for this store. |
| * @return A key-value store. |
| */ |
| @JvmStatic |
| fun <K, V> open(map: MutableMap<K, V>) = MapKeyValueStore(map) |
| } |
| |
| override suspend fun get(key: K): V? = map[key] |
| |
| override suspend fun put(key: K, value: V) { |
| map[key] = value |
| } |
| |
| override suspend fun keys(): Iterable<K> = map.keys |
| |
| /** |
| * Has no effect in this KeyValueStore implementation. |
| */ |
| override fun close() {} |
| } |