java

Java/Java源代码/codedemo/netty40x/echo/EchoServerHandler.java

@@ -0,0 +1,38 @@
+package cn.aofeng.demo.netty40x.echo;
+
+import java.nio.charset.Charset;
+
+import org.apache.log4j.Logger;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelInboundHandlerAdapter;
+import io.netty.channel.ChannelHandler.Sharable;
+
+/**
+ * 将接收到的数据原样返回给发送方。
+ * 
+ * @author <a href="mailto:aofengblog@163.com">聂勇</a>
+ */
+@Sharable
+public class EchoServerHandler extends ChannelInboundHandlerAdapter {
+
+    private static Logger _logger = Logger.getLogger(EchoServerHandler.class);
+    
+    public void channelRead(ChannelHandlerContext ctx, Object msg) {
+        ByteBuf inData = (ByteBuf) msg;
+        String str = inData.toString(Charset.forName("UTF-8"));
+        _logger.info( String.format("Server receive data:%s", str) );
+        ctx.write(inData);
+    }
+
+    public void channelReadComplete(ChannelHandlerContext ctx) {
+        ctx.flush().close();
+    }
+
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
+        _logger.error("occurs error", cause);
+        ctx.close();
+    }
+
+}