监听唤醒端口允许漂移，防止唤醒端口被其他程序占用时无法实现唤醒

src/main/java/com/lion/lionwebsite/Service/RemoteService.java

@@ -5,6 +5,7 @@ import com.lion.lionwebsite.Domain.Gallery;
 import com.lion.lionwebsite.Domain.GalleryTask;
 import com.lion.lionwebsite.Message.*;
 
+import com.lion.lionwebsite.Util.CustomUtil;
 import io.netty.bootstrap.Bootstrap;
 import io.netty.channel.*;
 import io.netty.channel.nio.NioEventLoopGroup;
@@ -18,6 +19,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
 
 import java.io.IOException;
+import java.io.OutputStream;
 import java.net.*;
 import java.util.Arrays;
 import java.util.HashMap;
@@ -72,18 +74,32 @@ public class RemoteService {
 
     public boolean initChannel(){
         try {
-            channelFuture = new Bootstrap()
+            int i;
-                    .channel(NioSocketChannel.class)
+            for(i=0; i<20; i++) {
-                    .group(new NioEventLoopGroup())
+                try {
-                    .handler(new ChannelInitializer<NioSocketChannel>() {
+                    channelFuture = new Bootstrap()
-                        @Override
+                            .channel(NioSocketChannel.class)
-                        protected void initChannel(NioSocketChannel channel){
+                            .group(new NioEventLoopGroup())
-                            channel.pipeline().addLast(new LengthFieldBasedFrameDecoder(100000000, 1, 4));
+                            .handler(new ChannelInitializer<NioSocketChannel>() {
-                            channel.pipeline().addLast(new MessageCodec());
+                                @Override
-                            channel.pipeline().addLast(new LoggingHandler());
+                                protected void initChannel(NioSocketChannel channel) {
-                            channel.pipeline().addLast(new MyChannelInboundHandlerAdapter());
+                                    channel.pipeline().addLast(new LengthFieldBasedFrameDecoder(100000000, 1, 4));
-                        }
+                                    channel.pipeline().addLast(new MessageCodec());
-                    }).connect(new InetSocketAddress(ip, port)).sync();
+                                    channel.pipeline().addLast(new LoggingHandler());
+                                    channel.pipeline().addLast(new MyChannelInboundHandlerAdapter());
+                                }
+                            }).connect(new InetSocketAddress(ip, port + i)).sync();
+                    break;
+                }catch (Exception e){
+                    log.error("连接storageNode失败，端口偏移量(重试次数):{}", i);
+                }
+            }
+
+            //超过二十次连不上，主动抛出错误，由下方catch
+            if(i==20) {
+                throw new Exception();
+            }
+
             log.info("connect success");
             if(pushService != null)
                 pushService.storageNodeOnline();
@@ -163,15 +179,22 @@ public class RemoteService {
     }
 
     public void monitorFunc(){
-        System.out.println("监听端口： " + (port + 1) + " 等待节点上线");
+        int real_port = CustomUtil._findIdlePort(port + 1);
-        try(ServerSocket socket = new ServerSocket(port + 1)) {
+        log.info("监听端口： {}等待节点上线", real_port);
+        try(ServerSocket socket = new ServerSocket(real_port)) {
             Socket client;
             while(true){
                 client = socket.accept();
-                client.close();
+
                 if(client.getInetAddress().getHostAddress().equals("5.255.110.45")){
-                    System.out.println("尝试连接");
+                    //连接之后发送lionwebsite，否则存储节点不能确认这个端口是否有效
+                    OutputStream outputStream = client.getOutputStream();
+                    outputStream.write("lionwebsite".getBytes());
+                    outputStream.flush();
+                    outputStream.close();
+                    log.info("尝试连接");
                     initChannel();
+                    client.close();
                     socket.close();
                     break;
                 }

src/main/java/com/lion/lionwebsite/Util/CustomUtil.java

@@ -80,11 +80,11 @@ public class CustomUtil {
      *
      * @return  可用端口的起始位置  -1为没有（几乎没有可能）
      */
-    public static short _findIdlePort(){
+    public static int _findIdlePort(int port) {
-        for(int i=20000; i<65535; i++){
+        for(int i=port; i<65535; i++){
             try(ServerSocket ignored = new ServerSocket(i)){
                 ignored.close();
-                return (short) i;
+                return  i;
             }catch (IOException ignored) {
             }
         }