Netty 内蒂。写入处理程序外部的通道
是否有一种方法可以写入事件处理程序外部的通道。我想向频道写入我在控制台中键入的字符串。可能吗Netty 内蒂。写入处理程序外部的通道,netty,Netty,是否有一种方法可以写入事件处理程序外部的通道。我想向频道写入我在控制台中键入的字符串。可能吗 fun main() { //Bootstrapping val eventLoopGroup = NioEventLoopGroup() val serverBootstrap = ServerBootstrap() serverBootstrap.group(eventLoopGroup) serverBootstrap.channel(NioServerSo
fun main() {
//Bootstrapping
val eventLoopGroup = NioEventLoopGroup()
val serverBootstrap = ServerBootstrap()
serverBootstrap.group(eventLoopGroup)
serverBootstrap.channel(NioServerSocketChannel::class.java)
serverBootstrap.localAddress(InetSocketAddress(9988))
serverBootstrap.childHandler(object : ChannelInitializer<SocketChannel>() {
override fun initChannel(channel: SocketChannel?) {
channel?.pipeline()
?.addLast(StringEncoder(StandardCharsets.UTF_8))
?.addLast(StringDecoder(StandardCharsets.UTF_8))
?.addLast(RemoteKeyboardHandler())
}
})
val ch = serverBootstrap.bind().sync().channel()
while (true) {
val input = readLine()
val future = ch.writeAndFlush(input)
future.addListener {
println(it.isSuccess)
println(it.cause())
}
}
}
fun main(){
//自举
val eventLoopGroup=NioEventLoopGroup()
val serverBootstrap=serverBootstrap()
serverBootstrap.group(eventLoopGroup)
通道(NioServerSocketChannel::class.java)
serverBootstrap.localAddress(InetSocketAddress(9988))
childHandler(对象:ChannelInitializer(){
覆盖通道(通道:SocketChannel?){
通道?.pipeline()
?addLast(StringEncoder(StandardCharsets.UTF_8))
?addLast(字符串解码器(StandardCharsets.UTF_8))
?.addLast(RemoteKeyboardHandler())
}
})
val ch=serverBootstrap.bind().sync().channel()
while(true){
val input=readLine()
val future=ch.writeAndFlush(输入)
future.addListener{
println(it.isSuccess)
println(it.cause())
}
}
}
这是我的服务器代码。在处理程序中,我只是在连接时发送一个
“helloworld”
字符串。我得到操作不支持异常
。我在上找到,因此无法写入服务器通道。也许这就是重点。那么,在这种情况下,我应该怎么做呢?首先,如果您在这里发布您的客户机/服务器类会有所帮助的话
您可以从引导中获取通道对象:
Channel channel = new Bootstrap()
.group(workerGroup)
.channel(NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ch.pipeline()
.addLast(new StringEncoder())
.addLast(new StringDecoder())
.addLast(new YourChannelHandler();
}
}).connect(YourIp, YourPort).sync().channel();
当您想要添加控制台输入时,可以直接在下面执行此操作:
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.epoll.Epoll;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
public class Client {
private static final boolean EPOLL = Epoll.isAvailable();
private static final int PORT = 25112;
private static final String HOST = "localhost";
private Channel ch;
private static Integer count;
// instead you can use a method to start the client
public Client() {
EventLoopGroup workerGroup = (EPOLL) ? new EpollEventLoopGroup() : new NioEventLoopGroup();
try {
ch = new Bootstrap()
.group(workerGroup)
.channel((EPOLL) ? EpollSocketChannel.class : NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) {
ch.pipeline()
.addLast(new StringEncoder(StandardCharsets.UTF_8))
.addLast(new StringDecoder(StandardCharsets.UTF_8))
.addLast(new ClientMessageHandler());
}
}).connect(HOST, PORT).sync().channel();
// console input
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String line = "";
while ((line = reader.readLine()) != null) {
if (line.startsWith("!exit") || line.startsWith("!disconnect")) {
reader.close();
line = null;
ch.disconnect();
break;
} else if (line.toCharArray().length == 0) {
continue;
} else if (line.startsWith("!ping")) {
ch.writeAndFlush(String.valueOf(System.nanoTime()));
continue;
}
ch.writeAndFlush(line);
}
//runCommandPromptReading();
} catch (InterruptedException | IOException e) {
e.printStackTrace();
} finally {
workerGroup.shutdownGracefully();
}
}
// private void runCommandPromptReading() throws IOException {
// BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
// String line = "";
//
// while ((line = reader.readLine()) != null) {
// if (line.startsWith("!exit") || line.startsWith("!disconnect")) {
// reader.close();
// line = null;
// ch.disconnect();
// break;
// } else if (line.toCharArray().length == 0) {
// continue;
// } else if (line.startsWith("!ping")) {
// ch.writeAndFlush(String.valueOf(System.nanoTime()));
// continue;
// }
//
// ch.writeAndFlush(line);
// }
}
导入io.netty.bootstrap.bootstrap;
导入io.netty.channel.channel;
导入io.netty.channel.ChannelInitializer;
导入io.netty.channel.EventLoopGroup;
导入io.netty.channel.epoll.epoll;
导入io.netty.channel.epoll.EpollEventLoopGroup;
导入io.netty.channel.epoll.EpollSocketChannel;
导入io.netty.channel.nio.NioEventLoopGroup;
导入io.netty.channel.socket.SocketChannel;
导入io.netty.channel.socket.nio.NioSocketChannel;
导入io.netty.handler.codec.string.StringDecoder;
导入io.netty.handler.codec.string.StringEncoder;
导入java.io.BufferedReader;
导入java.io.IOException;
导入java.io.InputStreamReader;
导入java.nio.charset.StandardCharset;
公共类客户端{
私有静态最终布尔值EPOLL=EPOLL.isAvailable();
专用静态最终int端口=25112;
私有静态最终字符串HOST=“localhost”;
专用信道;
私有静态整数计数;
//相反,您可以使用一种方法来启动客户机
公共客户机(){
EventLoopGroup workerGroup=(EPOLL)?new-EpollEventLoopGroup():new-NioEventLoopGroup();
试一试{
ch=新引导()
.group(workerGroup)
.channel((EPOLL)?EpollSocketChannel.class:NioSocketChannel.class)
.handler(新的通道初始值设定项(){
@凌驾
受保护信道(SocketChannel ch){
ch.管道()
.addLast(新的StringEncoder(StandardCharsets.UTF_8))
.addLast(新的字符串解码器(StandardCharsets.UTF_8))
.addLast(新ClientMessageHandler());
}
}).connect(主机、端口).sync().channel();
//控制台输入
BufferedReader reader=新的BufferedReader(新的InputStreamReader(System.in));
字符串行=”;
而((line=reader.readLine())!=null){
if(line.startsWith(“!exit”)| line.startsWith(“!disconnect”)){
reader.close();
行=空;
ch.断开连接();
打破
}else if(line.toCharArray().length==0){
继续;
}else if(第行以(“!ping”)开头){
ch.writeAndFlush(String.valueOf(System.nanoTime());
继续;
}
ch.writeAndFlush(行);
}
//runCommandPromptReading();
}捕获(中断异常| IOE异常){
e、 printStackTrace();
}最后{
workerGroup.shutdownGracefully();
}
}
//私有void runCommandPromptReading()引发IOException{
//BufferedReader reader=新的BufferedReader(新的InputStreamReader(System.in));
//字符串行=”;
//
//而((line=reader.readLine())!=null){
//if(line.startsWith(“!exit”)| line.startsWith(“!disconnect”)){
//reader.close();
//行=空;
//ch.断开连接();
//中断;
//}else if(line.toCharArray().length==0){
//继续;
//}else if(line.startsWith(“!ping”)){
//ch.writeAndFlush(String.valueOf(System.nanoTime());
//继续;
// }
//
//ch.writeAndFlush(行);
// }
}
我希望这是您想要的写入
服务器频道
不受支持,因为此套接字
只接受新的套接字。
您想要写入子频道
,您在频道初始值设定项中有一个引用
谢谢您的回复。我已经添加了代码示例。它是在Kotlin中是,但我认为它非常简单。因此,我应该存储一个通道,该通道被传递到initChannel
方法中,对吗?这个方法可能被调用多次(对于每个新连接)。我不确定你真正想要的是什么。我只希望有一个客户端可以与服务器通信。我想为android编写一个远程键盘。因此,当你打开设备上的“键盘”时,它将连接服务器端。服务器将读取击键并将其发送到设备。这就是我的想法。我在使用吗
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.epoll.Epoll;
import io.netty.channel.epoll.EpollEventLoopGroup;
import io.netty.channel.epoll.EpollSocketChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
public class Client {
private static final boolean EPOLL = Epoll.isAvailable();
private static final int PORT = 25112;
private static final String HOST = "localhost";
private Channel ch;
private static Integer count;
// instead you can use a method to start the client
public Client() {
EventLoopGroup workerGroup = (EPOLL) ? new EpollEventLoopGroup() : new NioEventLoopGroup();
try {
ch = new Bootstrap()
.group(workerGroup)
.channel((EPOLL) ? EpollSocketChannel.class : NioSocketChannel.class)
.handler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel ch) {
ch.pipeline()
.addLast(new StringEncoder(StandardCharsets.UTF_8))
.addLast(new StringDecoder(StandardCharsets.UTF_8))
.addLast(new ClientMessageHandler());
}
}).connect(HOST, PORT).sync().channel();
// console input
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String line = "";
while ((line = reader.readLine()) != null) {
if (line.startsWith("!exit") || line.startsWith("!disconnect")) {
reader.close();
line = null;
ch.disconnect();
break;
} else if (line.toCharArray().length == 0) {
continue;
} else if (line.startsWith("!ping")) {
ch.writeAndFlush(String.valueOf(System.nanoTime()));
continue;
}
ch.writeAndFlush(line);
}
//runCommandPromptReading();
} catch (InterruptedException | IOException e) {
e.printStackTrace();
} finally {
workerGroup.shutdownGracefully();
}
}
// private void runCommandPromptReading() throws IOException {
// BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
// String line = "";
//
// while ((line = reader.readLine()) != null) {
// if (line.startsWith("!exit") || line.startsWith("!disconnect")) {
// reader.close();
// line = null;
// ch.disconnect();
// break;
// } else if (line.toCharArray().length == 0) {
// continue;
// } else if (line.startsWith("!ping")) {
// ch.writeAndFlush(String.valueOf(System.nanoTime()));
// continue;
// }
//
// ch.writeAndFlush(line);
// }
}