Initial commit of secondary development sample code

心跳保活/UdpServer.java

@@ -0,0 +1,59 @@
+package com.github.paicoding.forum.web.front.test;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
+import java.net.DatagramSocket;
+import java.net.DatagramPacket;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+
+/**
+ * UDP 服务器
+ * 本类使用单线程的线程池实现一个简单的UDP服务器，用于接收客户端发送的心跳信息。
+ * 实现方法多种多样，需要根据具体的业务场景进行选择。
+ */
+
+@Slf4j
+@Component
+public class UdpServer {
+
+
+    private static final int PORT = 10002;
+    private volatile boolean isRunning = true; // 标志变量
+    private final ExecutorService executor = Executors.newSingleThreadExecutor();
+
+    @PostConstruct
+    public void startServer() {
+        executor.submit(this::listenUdpPackets);
+    }
+
+    @PreDestroy
+    public void stopServer() {
+        isRunning = false;
+        executor.shutdown();
+        log.info("UDP服务器已停止");
+    }
+
+
+    private void listenUdpPackets() {
+        try (DatagramSocket socket = new DatagramSocket(PORT)) {
+            log.info("UDP Server started on port {}", PORT);
+            byte[] buffer = new byte[102400];
+            DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
+            while (isRunning) {
+                socket.receive(packet);
+                String message = new String(packet.getData(), 0, packet.getLength()).trim();
+                log.info("❤️ Heartbeat from: {} ", packet.getAddress());
+                log.info("📦 Data received: {}", message);
+            }
+        } catch (Exception e) {
+            log.error("UDP Server error: {}", e.getMessage(), e);
+        }
+    }
+
+
+}