t-io客户端服务端的编写

            org.t-io
            tio-core
            3.7.4.v20210808-RELEASE
        

总共五个类。数据模型Packet、客户端处理器、客户端监听器、服务端处理器、服务端监听器。

• 数据模型

package com.example.mindsa.client;


import lombok.Getter;
import lombok.Setter;
import org.tio.core.intf.Packet;
@Setter
@Getter
public class MindPackage extends Packet {
    private static final long serialVersionUID = -172060606924066412L;
    public static final int HEADER_LENGTH = 4;//消息头的长度
    public static final String CHARSET = "utf-8";
    private byte[] body;
}

• 客户端处理器

  package com.example.mindsa.client;
  
  import org.tio.client.intf.ClientAioHandler;
  import org.tio.core.ChannelContext;
  import org.tio.core.TioConfig;
  import org.tio.core.exception.TioDecodeException;
  import org.tio.core.intf.Packet;
  
  import java.nio.ByteBuffer;
  
  public class ClientAioHandlerImpl implements ClientAioHandler {
      /**
       * 创建心跳包
       *
       * @param channelContext
       * @return
       * @author tanyaowu
       */
      @Override
      public Packet heartbeatPacket(ChannelContext channelContext) {
          return new MindPackage();
      }
  
      /**
       * 根据ByteBuffer解码成业务需要的Packet对象.
       * 如果收到的数据不全，导致解码失败，请返回null，在下次消息来时框架层会自动续上前面的收到的数据
       *
       * @param buffer         参与本次希望解码的ByteBuffer
       * @param limit          ByteBuffer的limit
       * @param position       ByteBuffer的position，不一定是0哦
       * @param readableLength ByteBuffer参与本次解码的有效数据（= limit - position）
       * @param channelContext
       * @return
       * @throws TioDecodeException
       */
      @Override
      public Packet decode(ByteBuffer buffer, int limit, int position, int readableLength, ChannelContext channelContext) throws TioDecodeException {
          //至少要有表示数据大小的四个字节。否则会因为无法知道数据大小而无法解包。
          if (readableLength < MindPackage.HEADER_LENGTH) {
              return null;
          }
          //获取存放在头部的四个字节，即数据字节的长度。这里要与服务器的编码约定一致：即头部4byte存放数据长度。
          int bodyLength = buffer.getInt();
          if (bodyLength < 0) {
              throw new TioDecodeException("头部4byte标识的数据长度是0");
          }
          //数据长度+头部4byte的长度大于可取得的数据长度，说明是半包，无法解析成完整的Packet。
          if (bodyLength + MindPackage.HEADER_LENGTH > readableLength) {
              return null;
          } else {
              MindPackage mindPackage = new MindPackage();
              byte[] bytes = new byte[bodyLength];
              //getInt已经把头部的四个字节读取掉了，position在4的位置，把剩下的数据装入容器
              buffer.get(bytes);
              mindPackage.setBody(bytes);
              return mindPackage;
          }
      }
  
      /**
       * 编码
       *
       * @param packet
       * @param tioConfig
       * @param channelContext
       * @return
       * @author: tanyaowu
       */
      @Override
      public ByteBuffer encode(Packet packet, TioConfig tioConfig, ChannelContext channelContext) {
          MindPackage mindPackage = (MindPackage) packet;
          byte[] body = mindPackage.getBody();
          int bodyLength = 0;
          if (body != null) {
              bodyLength = body.length;
          }
          //初始化ByteBuffer，长度为数据长度+标识数据长度的头部4byte字节。
          ByteBuffer byteBuffer = ByteBuffer.allocate(bodyLength + MindPackage.HEADER_LENGTH);
          byteBuffer.order(tioConfig.getByteOrder());
          //获取存放在头部的四个字节，即数据字节的长度。这里要与服务器的解码约定一致：即头部4byte存放数据长度。
          byteBuffer.putInt(bodyLength);
          if (body != null) {
              //存放数据
              byteBuffer.put(body);
          }
          return byteBuffer;
      }
  
      /**
       * 处理消息包
       *
       * @param packet
       * @param channelContext
       * @throws Exception
       * @author: tanyaowu
       */
      @Override
      public void handler(Packet packet, ChannelContext channelContext) throws Exception {
          //处理解码后的消息
          MindPackage mindPackage = (MindPackage) packet;
          //将byte数据转utf8字符串输出。
          System.out.println(new String(mindPackage.getBody(), MindPackage.CHARSET));
      }
  }
  

• 客户端监听器

  package com.example.mindsa.client;
  
  import org.tio.client.intf.ClientAioListener;
  import org.tio.core.ChannelContext;
  import org.tio.core.intf.Packet;
  
  public class ClientAioListenerImpl implements ClientAioListener {
      @Override
      public void onAfterConnected(ChannelContext channelContext, boolean b, boolean b1) throws Exception {
  
      }
  
      @Override
      public void onAfterDecoded(ChannelContext channelContext, Packet packet, int i) throws Exception {
  
      }
  
      @Override
      public void onAfterReceivedBytes(ChannelContext channelContext, int i) throws Exception {
  
      }
  
      @Override
      public void onAfterSent(ChannelContext channelContext, Packet packet, boolean b) throws Exception {
  
      }
  
      @Override
      public void onAfterHandled(ChannelContext channelContext, Packet packet, long l) throws Exception {
  
      }
  
      @Override
      public void onBeforeClose(ChannelContext channelContext, Throwable throwable, String s, boolean b) throws Exception {
  
      }
  }
  

• 服务端处理器

  package com.example.mindsa.server;
  
  import org.tio.core.ChannelContext;
  import org.tio.core.TioConfig;
  import org.tio.core.intf.Packet;
  import org.tio.server.intf.ServerAioHandler;
  
  import java.nio.ByteBuffer;
  
  public class ServerAioHandlerImpl implements ServerAioHandler {
  
      /**
       * 根据ByteBuffer解码成业务需要的Packet对象.
       * 如果收到的数据不全，导致解码失败，请返回null，在下次消息来时框架层会自动续上前面的收到的数据
       *
       * @param buffer         参与本次希望解码的ByteBuffer
       * @param limit          ByteBuffer的limit
       * @param position       ByteBuffer的position，不一定是0哦
       * @param readableLength ByteBuffer参与本次解码的有效数据（= limit - position）
       * @param channelContext
       * @return
       */
      @Override
      public Packet decode(ByteBuffer buffer, int limit, int position, int readableLength, ChannelContext channelContext){
  
          return null;
      }
  
      /**
       * 编码
       *
       * @param packet
       * @param tioConfig
       * @param channelContext
       * @return
       * @author: tanyaowu
       */
      @Override
      public ByteBuffer encode(Packet packet, TioConfig tioConfig, ChannelContext channelContext) {
          return null;
      }
  
      /**
       * 处理消息包
       *
       * @param packet
       * @param channelContext
       * @throws Exception
       * @author: tanyaowu
       */
      @Override
      public void handler(Packet packet, ChannelContext channelContext) throws Exception {
  
      }
  }
  

• 服务端监听器

  package com.example.mindsa.server;
  
  import org.tio.core.ChannelContext;
  import org.tio.core.intf.Packet;
  import org.tio.server.intf.ServerAioListener;
  
  public class ServerAioListenerImpl implements ServerAioListener {
      @Override
      public boolean onHeartbeatTimeout(ChannelContext channelContext, Long aLong, int i) {
          return false;
      }
  
      @Override
      public void onAfterConnected(ChannelContext channelContext, boolean b, boolean b1) throws Exception {
  
      }
  
      @Override
      public void onAfterDecoded(ChannelContext channelContext, Packet packet, int i) throws Exception {
  
      }
  
      @Override
      public void onAfterReceivedBytes(ChannelContext channelContext, int i) throws Exception {
  
      }
  
      @Override
      public void onAfterSent(ChannelContext channelContext, Packet packet, boolean b) throws Exception {
  
      }
  
      @Override
      public void onAfterHandled(ChannelContext channelContext, Packet packet, long l) throws Exception {
  
      }
  
      @Override
      public void onBeforeClose(ChannelContext channelContext, Throwable throwable, String s, boolean b) throws Exception {
  
      }
  }
  

  启动客户端：

  package com.example.mindsa.client;
  
  import org.tio.client.ClientChannelContext;
  import org.tio.client.ClientTioConfig;
  import org.tio.client.ReconnConf;
  import org.tio.client.TioClient;
  import org.tio.core.Node;
  import org.tio.core.Tio;
  
  public class ClientStarter {
      public static void main(String[] args) throws Exception {
          ClientTioConfig clientTioConfig = new ClientTioConfig(new ClientAioHandlerImpl(), new ClientAioListenerImpl(), new ReconnConf());
          TioClient tioClient = new TioClient(clientTioConfig);
          ClientChannelContext connect = tioClient.connect(new Node("127.0.0.1", 8080));
          Tio.send(connect, new MindPackage());
      }
  }
  

  启动服务端

  package com.example.mindsa.server;
  
  import org.tio.server.ServerTioConfig;
  import org.tio.server.TioServer;
  
  import java.io.IOException;
  
  public class ServerStarter {
      public static void main(String[] args) throws IOException {
          ServerTioConfig serverTioConfig = new ServerTioConfig(new ServerAioHandlerImpl(), new ServerAioListenerImpl());
          TioServer tioServer = new TioServer(serverTioConfig);
          tioServer.start(null, 8080);
      }
  }