| /* |
| * 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 io.lettuce.core.RedisClient |
| import io.lettuce.core.RedisURI |
| import io.lettuce.core.api.StatefulRedisConnection |
| import io.lettuce.core.api.async.RedisAsyncCommands |
| import io.lettuce.core.codec.RedisCodec |
| import kotlinx.coroutines.Dispatchers |
| import kotlinx.coroutines.future.await |
| import org.apache.tuweni.bytes.Bytes |
| import org.checkerframework.checker.units.qual.K |
| import java.net.InetAddress |
| import java.util.concurrent.CompletionStage |
| import java.util.function.Function |
| import kotlin.coroutines.CoroutineContext |
| |
| /** |
| * A key-value store backed by Redis. |
| * |
| * @param uri The uri to the Redis store. |
| * @param keySerializer the serializer of key objects to bytes |
| * @param valueSerializer the serializer of value objects to bytes |
| * @param keyDeserializer the deserializer of keys from bytes |
| * @param valueDeserializer the deserializer of values from bytes |
| * @param coroutineContext the co-routine context in which this store executes |
| * @constructor Open a Redis-backed key-value store. |
| */ |
| class RedisKeyValueStore<K, V>( |
| uri: String, |
| private val keySerializer: (K) -> Bytes, |
| private val valueSerializer: (V) -> Bytes, |
| private val keyDeserializer: (Bytes) -> K, |
| private val valueDeserializer: (Bytes) -> V, |
| override val coroutineContext: CoroutineContext = Dispatchers.IO |
| ) : KeyValueStore<K, V> { |
| |
| companion object { |
| /** |
| * Open a Redis-backed key-value store. |
| * |
| * @param uri The uri to the Redis store. |
| * @param keySerializer the serializer of key objects to bytes |
| * @param valueSerializer the serializer of value objects to bytes |
| * @param keyDeserializer the deserializer of keys from bytes |
| * @param valueDeserializer the deserializer of values from bytes |
| * @return A key-value store. |
| */ |
| @JvmStatic |
| fun <K, V> open( |
| uri: String, |
| keySerializer: Function<K, Bytes>, |
| valueSerializer: Function<V, Bytes>, |
| keyDeserializer: Function<Bytes, K>, |
| valueDeserializer: Function<Bytes, V> |
| ) = RedisKeyValueStore(uri, |
| keySerializer::apply, |
| valueSerializer::apply, |
| keyDeserializer::apply, |
| valueDeserializer::apply) |
| |
| /** |
| * Open a Redis-backed key-value store. |
| * |
| * @param port The port for the Redis store. |
| * @param keySerializer the serializer of key objects to bytes |
| * @param valueSerializer the serializer of value objects to bytes |
| * @param keyDeserializer the deserializer of keys from bytes |
| * @param valueDeserializer the deserializer of values from bytes |
| * @return A key-value store. |
| */ |
| @JvmStatic |
| fun <K, V> open( |
| port: Int, |
| keySerializer: Function<K, Bytes>, |
| valueSerializer: Function<V, Bytes>, |
| keyDeserializer: Function<Bytes, K>, |
| valueDeserializer: Function<Bytes, V> |
| ) = |
| RedisKeyValueStore(port = port, |
| keySerializer = keySerializer::apply, |
| valueSerializer = valueSerializer::apply, |
| keyDeserializer = keyDeserializer::apply, |
| valueDeserializer = valueDeserializer::apply) |
| |
| /** |
| * Open a Redis-backed key-value store. |
| * |
| * @param address The address for the Redis store. |
| * @param keySerializer the serializer of key objects to bytes |
| * @param valueSerializer the serializer of value objects to bytes |
| * @param keyDeserializer the deserializer of keys from bytes |
| * @param valueDeserializer the deserializer of values from bytes |
| * @return A key-value store. |
| */ |
| @JvmStatic |
| fun <K, V> open( |
| address: InetAddress, |
| keySerializer: Function<K, Bytes>, |
| valueSerializer: Function<V, Bytes>, |
| keyDeserializer: Function<Bytes, K>, |
| valueDeserializer: Function<Bytes, V> |
| ) = |
| RedisKeyValueStore(6379, |
| address, |
| keySerializer::apply, |
| valueSerializer::apply, |
| keyDeserializer::apply, |
| valueDeserializer::apply) |
| |
| /** |
| * Open a Redis-backed key-value store. |
| * |
| * @param port The port for the Redis store. |
| * @param address The address for the Redis store. |
| * @param keySerializer the serializer of key objects to bytes |
| * @param valueSerializer the serializer of value objects to bytes |
| * @param keyDeserializer the deserializer of keys from bytes |
| * @param valueDeserializer the deserializer of values from bytes |
| * @return A key-value store. |
| */ |
| @JvmStatic |
| fun <K, V> open( |
| port: Int, |
| address: InetAddress, |
| keySerializer: Function<K, Bytes>, |
| valueSerializer: Function<V, Bytes>, |
| keyDeserializer: Function<Bytes, K>, |
| valueDeserializer: Function<Bytes, V> |
| ) = |
| RedisKeyValueStore(port, |
| address, |
| keySerializer::apply, |
| valueSerializer::apply, |
| keyDeserializer::apply, |
| valueDeserializer::apply) |
| |
| /** |
| * A [RedisCodec] for working with Bytes classes. |
| * |
| * @return A [RedisCodec] for working with Bytes classes. |
| */ |
| @JvmStatic |
| fun codec(): RedisCodec<Bytes, Bytes> = RedisBytesCodec() |
| } |
| |
| private val conn: StatefulRedisConnection<Bytes, Bytes> |
| private val asyncCommands: RedisAsyncCommands<Bytes, Bytes> |
| |
| /** |
| * Open a Redis-backed key-value store. |
| * |
| * @param port The port for the Redis store. |
| * @param address The address for the Redis store. |
| * @param keySerializer the serializer of key objects to bytes |
| * @param valueSerializer the serializer of value objects to bytes |
| * @param keyDeserializer the deserializer of keys from bytes |
| * @param valueDeserializer the deserializer of values from bytes |
| */ |
| @JvmOverloads |
| constructor( |
| port: Int = 6379, |
| address: InetAddress = InetAddress.getLoopbackAddress(), |
| keySerializer: (K) -> Bytes, |
| valueSerializer: (V) -> Bytes, |
| keyDeserializer: (Bytes) -> K, |
| valueDeserializer: (Bytes) -> V |
| ) : this(RedisURI.create(address.hostAddress, port).toURI().toString(), |
| keySerializer, |
| valueSerializer, |
| keyDeserializer, |
| valueDeserializer) |
| |
| init { |
| val redisClient = RedisClient.create(uri) |
| conn = redisClient.connect(codec()) |
| asyncCommands = conn.async() |
| } |
| |
| override suspend fun get(key: K): V? = asyncCommands.get(keySerializer(key)).thenApply { |
| if (it == null) { |
| null |
| } else { |
| valueDeserializer(it) |
| } |
| }.await() |
| |
| override suspend fun put(key: K, value: V) { |
| val future: CompletionStage<String> = asyncCommands.set(keySerializer(key), valueSerializer(value)) |
| future.await() |
| } |
| |
| override suspend fun keys(): Iterable<K> = asyncCommands.keys(Bytes.EMPTY).await().map(keyDeserializer) |
| |
| override fun close() { |
| conn.close() |
| } |
| } |