content: /*
   * Copyright 2020-2023 the original author or authors.
   *
   * 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
   *
   *      https://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 com.jun.mqttx.utils;
  
  import com.esotericsoftware.kryo.Kryo;
  import com.esotericsoftware.kryo.io.Input;
  import com.esotericsoftware.kryo.io.Output;
  import io.netty.util.concurrent.FastThreadLocal;
  
  import java.io.ByteArrayOutputStream;
  
  /**
   * 基于 <strong>kryo</strong> 序列化框架实现
   *
   * @since 1.0.7
   */
  public class KryoSerializer implements Serializer {
  
      private final FastThreadLocal<Kryo> holder = new FastThreadLocal<>() {
          @Override
          protected Kryo initialValue() {
              Kryo kryo = new Kryo();
              kryo.setRegistrationRequired(false);
              return kryo;
          }
      };
  
      @Override
      public byte[] serialize(Object target) {
          Kryo kryo = holder.get();
  
          ByteArrayOutputStream bos = new ByteArrayOutputStream();
          Output output = new Output(bos);
          kryo.writeClassAndObject(output, target);
          output.close();
          return bos.toByteArray();
      }
  
      @Override
      public <T> T deserialize(byte[] bytes, Class<T> clazz) {
          Kryo kryo = holder.get();
  
          //noinspection unchecked
          return (T) kryo.readClassAndObject(new Input(bytes));
      }
  }
  