public interface IRpcHelloService {
String hello(String name);
}
public interface IRpcService {
/** 加 */
public int add(int a,int b);
/** 减 */
public int sub(int a,int b);
/** 乘 */
public int mult(int a,int b);
/** 除 */
public int div(int a,int b);
}
接口实现类
public class RpcHelloServiceImpl implements IRpcHelloService {
public String hello(String name) {
return "Hello " + name + "!";
}
}
public class RpcServiceImpl implements IRpcService {
public int add(int a, int b) {
return a + b;
}
public int sub(int a, int b) {
return a - b;
}
public int mult(int a, int b) {
return a * b;
}
public int div(int a, int b) {
return a / b;
}
}
provider进行注册，开启对指定端口的监听
public class RpcRegistry {
private int port;
public RpcRegistry(int port){
this.port = port;
}
public void start(){
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
//自定义协议解码器
/** 入参有5个，分别解释如下
maxFrameLength：框架的最大长度。如果帧的长度大于此值，则将抛出TooLongFrameException。
lengthFieldOffset：长度字段的偏移量：即对应的长度字段在整个消息数据中得位置
lengthFieldLength：长度字段的长度。如：长度字段是int型表示，那么这个值就是4（long型就是8）
lengthAdjustment：要添加到长度字段值的补偿值
initialBytesToStrip：从解码帧中去除的第一个字节数
*/
pipeline.addLast(new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 4, 0, 4));
//自定义协议编码器
pipeline.addLast(new LengthFieldPrepender(4));
//对象参数类型编码器
pipeline.addLast("encoder",new ObjectEncoder());
//对象参数类型解码器
pipeline.addLast("decoder",new ObjectDecoder(Integer.MAX_VALUE,ClassResolvers.cacheDisabled(null)));
pipeline.addLast(new RegistryHandler());
}
})
.option(ChannelOption.SO_BACKLOG, 128)
.childOption(ChannelOption.SO_KEEPALIVE, true);
ChannelFuture future = b.bind(port).sync();
System.out.println("GP RPC Registry start listen at " + port );
future.channel().closeFuture().sync();
} catch (Exception e) {
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
public static void main(String[] args) throws Exception {
new RpcRegistry(8080).start();
}
}