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;
}
}
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();
}
}
}
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。