如何通过Netty管理Mybatis的连接池_云计算

发布时间:2024-10-14 09:27

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要通过Netty管理Mybatis的连接池，你需要遵循以下步骤：

引入依赖：确保你的项目中已经引入了Netty和Mybatis的相关依赖。
创建连接池：使用Mybatis提供的SqlSessionFactory创建一个连接池。你可以使用内置的PooledSqlSessionFactory或者自定义一个连接池实现。

import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.apache.ibatis.io.Resources; import java.io.InputStream; import java.util.Properties;  public class MybatisUtil {     private static SqlSessionFactory sqlSessionFactory;      static {         try {             String resource = "mybatis-config.xml";             InputStream inputStream = Resources.getResourceAsStream(resource);             Properties properties = new Properties();             properties.load(inputStream);             sqlSessionFactory = new SqlSessionFactoryBuilder().build(properties);         } catch (Exception e) {             e.printStackTrace();         }     }      public static SqlSessionFactory getSqlSessionFactory() {         return sqlSessionFactory;     } }

创建Netty的ChannelHandler：为了在Netty中使用Mybatis，你需要创建一个自定义的ChannelHandler，用于处理数据库操作。在这个ChannelHandler中，你可以使用Mybatis的SqlSession来执行SQL语句。

import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInboundHandlerAdapter; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory;  public class MybatisChannelHandler extends ChannelInboundHandlerAdapter {     private SqlSessionFactory sqlSessionFactory;      public MybatisChannelHandler(SqlSessionFactory sqlSessionFactory) {         this.sqlSessionFactory = sqlSessionFactory;     }      @Override     public void channelRead(ChannelHandlerContext ctx, Object msg) {         // 处理接收到的消息     }      @Override     public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {         cause.printStackTrace();         ctx.close();     }      public void executeSql(String sql, Object... params) {         try (SqlSession sqlSession = sqlSessionFactory.openSession()) {             // 使用SqlSession执行SQL语句             // 例如：sqlSession.selectOne("com.example.mapper.UserMapper.selectUserById", params);             sqlSession.close();         }     } }

在Netty服务器中添加ChannelHandler：将你的MybatisChannelHandler添加到Netty服务器的ChannelPipeline中。

import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.ChannelInitializer; import io.netty.channel.EventLoopGroup; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioServerSocketChannel; import io.netty.handler.codec.string.StringDecoder; import io.netty.handler.codec.string.StringEncoder;  public class NettyServer {     public static void main(String[] args) throws InterruptedException {         EventLoopGroup bossGroup = new NioEventLoopGroup();         EventLoopGroup workerGroup = new NioEventLoopGroup();         try {             ServerBootstrap serverBootstrap = new ServerBootstrap();             serverBootstrap.group(bossGroup, workerGroup)                     .channel(NioServerSocketChannel.class)                     .childHandler(new ChannelInitializer<SocketChannel>() {                         @Override                         protected void initChannel(SocketChannel ch) {                             ch.pipeline().addLast(new StringDecoder());                             ch.pipeline().addLast(new StringEncoder());                             ch.pipeline().addLast(new MybatisChannelHandler(MybatisUtil.getSqlSessionFactory()));                         }                     });              serverBootstrap.bind(8080).sync().channel().closeFuture().sync();         } finally {             bossGroup.shutdownGracefully();             workerGroup.shutdownGracefully();         }     } }