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() { @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。