mybatis

如何通过Netty管理Mybatis的连接池

小樊
87
2024-10-13 17:10:43
栏目: 编程语言

要通过Netty管理Mybatis的连接池,你需要遵循以下步骤:

  1. 引入依赖:确保你的项目中已经引入了Netty和Mybatis的相关依赖。

  2. 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;
    }
}
  1. 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();
        }
    }
}
  1. 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();
        }
    }
}

现在,你可以在Netty服务器中使用Mybatis连接池执行SQL语句了。请注意,这个示例仅用于演示目的,实际项目中你可能需要根据需求进行调整。

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