ing

.vscode/launch.json

@@ -13,7 +13,7 @@
       "stopOnEntry": false,
       "mainClass": "com.loafle.overflow.probe.container.Container",
       "projectName": "probe_container_general",
-      "args": ""
+      "args": "/project/overFlow/probe/pid/general.pid"
     },
     {
       "type": "java",

src/main/java/com/loafle/overflow/probe/container/Container.java

@@ -5,8 +5,13 @@ import com.loafle.overflow.probe.container.server.ContainerServer;
 public class Container {
 
     public static void main(String[] args) throws Exception {
-        ContainerServer server = new ContainerServer();
+        if(args.length <= 0) {
+            System.out.println("first parameter is path of pid file");
+            return;
+        }
+        String pidPath = args[0];
 
-        server.start();
+        ContainerServer server = new ContainerServer();
+        server.start(pidPath);
     }
 }

src/main/java/com/loafle/overflow/probe/container/server/ContainerServer.java

@@ -5,35 +5,80 @@ import io.netty.channel.*;
 import io.netty.channel.nio.NioEventLoopGroup;
 import io.netty.channel.socket.nio.NioServerSocketChannel;
 
-import java.net.InetSocketAddress;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
 
 public class ContainerServer {
-    private int port = 19390;
+  private int port;
 
-    public ContainerServer() {
-    }
+  public ContainerServer() {
+  }
 
-    public void start() throws Exception {
-        InetSocketAddress socketAddress = new InetSocketAddress("127.0.0.1", port);
+  public void start(String pidPath) throws Exception {
+    EventLoopGroup bossGroup = new NioEventLoopGroup(1);
+    EventLoopGroup workerGroup = new NioEventLoopGroup(10);
+    try {
+      ServerBootstrap b = new ServerBootstrap();
 
-        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
-        EventLoopGroup workerGroup = new NioEventLoopGroup(10);
+      b.group(bossGroup, workerGroup)
+              .channel(NioServerSocketChannel.class)
+              .childHandler(ContainerConfiguration.channelInitializer())
+              .option(ChannelOption.SO_BACKLOG, 128)
+              .childOption(ChannelOption.SO_KEEPALIVE, true);
+
+      ChannelFuture f = null;
+
+      for (int i = 60000; i < 61000; i++) {
         try {
-            ServerBootstrap b = new ServerBootstrap();
-
-            b.group(bossGroup, workerGroup)
-                    .channel(NioServerSocketChannel.class)
-                    .childHandler(ContainerConfiguration.channelInitializer())
-                    .option(ChannelOption.SO_BACKLOG, 128)
-                    .childOption(ChannelOption.SO_KEEPALIVE, true);
-
-            ChannelFuture f = b.bind(socketAddress).sync();
-
-            f.channel().closeFuture().sync();
-        } finally {
-            workerGroup.shutdownGracefully();
-            bossGroup.shutdownGracefully();
+          f = b.bind("127.0.0.1", i).sync();
+          this.port = i;
+          break;
+        } catch (Exception e) {
+          System.out.println(e);
+          continue;
         }
+      }
+
+      if (null == f) {
+        System.out.println("There is not available port");
+        return;
+      }
+
+      try {
+        FileOutputStream outputStream = new FileOutputStream(pidPath);
+        outputStream.write(Integer.toString(this.port).getBytes());
+        outputStream.close();
+      } catch (IOException e) {
+        System.out.println(e);
+        return;
+      }
+
+      Runtime.getRuntime().addShutdownHook(new Thread()
+      {
+        @Override
+        public void run()
+        {
+          ContainerServer.onStop(pidPath);
+        }
+      });
+
+      f.channel().closeFuture().sync();
+    } finally {
+      onStop(pidPath);
+
+      workerGroup.shutdownGracefully();
+      bossGroup.shutdownGracefully();
     }
+  }
+
+  private static void onStop(String pidPath) {
+    try {
+      File f = new File(pidPath);
+      f.delete();
+    } catch (Exception e) {
+      System.out.println(e);
+    }
+  }
 
 }