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| public class RpcConsumer {
public static void main(String [] args){
IRpcHelloService rpcHello = RpcProxy.create(IRpcHelloService.class);
System.out.println(rpcHello.hello("Tom老师"));
IRpcService service = RpcProxy.create(IRpcService.class);
System.out.println("8 + 2 = " + service.add(8, 2));
System.out.println("8 - 2 = " + service.sub(8, 2));
System.out.println("8 * 2 = " + service.mult(8, 2));
System.out.println("8 / 2 = " + service.div(8, 2));
}
}
public class RpcProxy {
public static <T> T create(Class<?> clazz){
MethodProxy proxy = new MethodProxy(clazz);
Class<?> [] interfaces = clazz.isInterface() ?
new Class[]{clazz} :
clazz.getInterfaces();
T result = (T) Proxy.newProxyInstance(clazz.getClassLoader(),interfaces,proxy);
return result;
}
private static class MethodProxy implements InvocationHandler {
private Class<?> clazz;
public MethodProxy(Class<?> clazz){
this.clazz = clazz;
}
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if (Object.class.equals(method.getDeclaringClass())) {
try {
return method.invoke(this, args);
} catch (Throwable t) {
t.printStackTrace();
}
} else {
return rpcInvoke(proxy,method, args);
}
return null;
}
public Object rpcInvoke(Object proxy,Method method,Object[] args){
InvokerProtocol msg = new InvokerProtocol();
msg.setClassName(this.clazz.getName());
msg.setMethodName(method.getName());
msg.setValues(args);
msg.setParames(method.getParameterTypes());
final RpcProxyHandler consumerHandler = new RpcProxyHandler();
EventLoopGroup group = new NioEventLoopGroup();
try {
Bootstrap b = new Bootstrap();
b.group(group)
.channel(NioSocketChannel.class)
.option(ChannelOption.TCP_NODELAY, true)
.handler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast("frameDecoder", new LengthFieldBasedFrameDecoder(Integer.MAX_VALUE, 0, 4, 0, 4));
pipeline.addLast("frameEncoder", new LengthFieldPrepender(4));
pipeline.addLast("encoder", new ObjectEncoder());
pipeline.addLast("decoder", new ObjectDecoder(Integer.MAX_VALUE, ClassResolvers.cacheDisabled(null)));
pipeline.addLast("handler",consumerHandler);
}
});
ChannelFuture future = b.connect("localhost", 8080).sync();
future.channel().writeAndFlush(msg).sync();
future.channel().closeFuture().sync();
} catch(Exception e){
e.printStackTrace();
}finally {
group.shutdownGracefully();
}
return consumerHandler.getResponse();
}
}
}
public class RpcProxyHandler extends ChannelInboundHandlerAdapter {
private Object response;
public Object getResponse() {
return response;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
response = msg;
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
System.out.println("client exception is general");
}
}
|
