content: /*
   * Copyright (C) 2020 ActiveJ LLC.
   *
   * 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 io.activej.memcache.client;
  
  import io.activej.common.Checks;
  import io.activej.memcache.protocol.MemcacheRpcMessage.GetRequest;
  import io.activej.memcache.protocol.MemcacheRpcMessage.GetResponse;
  import io.activej.memcache.protocol.MemcacheRpcMessage.PutRequest;
  import io.activej.memcache.protocol.MemcacheRpcMessage.Slice;
  import io.activej.promise.Promise;
  import io.activej.reactor.AbstractReactive;
  import io.activej.reactor.Reactor;
  import io.activej.rpc.client.IRpcClient;
  
  import static io.activej.reactor.Reactive.checkInReactorThread;
  
  public abstract class AbstractMemcacheClient<K, V> extends AbstractReactive
  	implements IMemcacheClient<K, V> {
  	private static final boolean CHECKS = Checks.isEnabled(AbstractMemcacheClient.class);
  
  	private final IRpcClient rpcClient;
  
  	protected AbstractMemcacheClient(Reactor reactor, IRpcClient rpcClient) {
  		super(reactor);
  		this.rpcClient = rpcClient;
  	}
  
  	protected abstract byte[] encodeKey(K key);
  
  	protected abstract Slice encodeValue(V value);
  
  	protected abstract V decodeValue(Slice slice);
  
  	@Override
  	public Promise<Void> put(K key, V value, int timeout) {
  		if (CHECKS) checkInReactorThread(this);
  		PutRequest request = new PutRequest(encodeKey(key), encodeValue(value));
  		return rpcClient.sendRequest(request, timeout).toVoid();
  	}
  
  	@Override
  	public Promise<V> get(K key, int timeout) {
  		if (CHECKS) checkInReactorThread(this);
  		GetRequest request = new GetRequest(encodeKey(key));
  		return rpcClient.<GetRequest, GetResponse>sendRequest(request, timeout)
  			.map(response -> decodeValue(response.getData()));
  	}
  
  	@Override
  	public Promise<Void> put(K key, V value) {
  		if (CHECKS) checkInReactorThread(this);
  		PutRequest request = new PutRequest(encodeKey(key), encodeValue(value));
  		return rpcClient.sendRequest(request).toVoid();
  	}
  
  	@Override
  	public Promise<V> get(K key) {
  		if (CHECKS) checkInReactorThread(this);
  		GetRequest request = new GetRequest(encodeKey(key));
  		return rpcClient.<GetRequest, GetResponse>sendRequest(request)
  			.map(response -> decodeValue(response.getData()));
  	}
  }
  