解决升级undertow后，性能监控tomcat信息tab项展示的问题

jeecg-boot/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/config/init/UndertowConfiguration.java

@@ -1,7 +1,10 @@
 package org.jeecg.config.init;
 
 import io.undertow.server.DefaultByteBufferPool;
+import io.undertow.server.handlers.BlockingHandler;
 import io.undertow.websockets.jsr.WebSocketDeploymentInfo;
+import org.jeecg.modules.monitor.actuator.undertow.CustomUndertowMetricsHandler;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.context.annotation.Configuration;
@@ -12,7 +15,14 @@ import org.springframework.context.annotation.Configuration;
  * 解决启动提示： WARN  io.undertow.websockets.jsr:68 - UT026010: Buffer pool was not set on WebSocketDeploymentInfo, the default pool will be used
  */
 @Configuration
-public class UndertowConfiguration implements WebServerFactoryCustomizer<UndertowServletWebServerFactory>{
+public class UndertowConfiguration implements WebServerFactoryCustomizer<UndertowServletWebServerFactory> {
+
+    /**
+     * 自定义undertow监控指标工具类
+     * for [QQYUN-11902]tomcat 替换undertow 这里的功能还没修改
+     */
+    @Autowired
+    private CustomUndertowMetricsHandler customUndertowMetricsHandler;
 
     @Override
     public void customize(UndertowServletWebServerFactory factory) {
@@ -24,6 +34,9 @@ public class UndertowConfiguration implements WebServerFactoryCustomizer<Underto
             webSocketDeploymentInfo.setBuffers(new DefaultByteBufferPool(true, 8192));
             
             deploymentInfo.addServletContextAttribute("io.undertow.websockets.jsr.WebSocketDeploymentInfo", webSocketDeploymentInfo);
+
+            // 添加自定义 监控 handler
+            deploymentInfo.addInitialHandlerChainWrapper(next -> new BlockingHandler(customUndertowMetricsHandler.wrap(next)));
         });
     }
 }

jeecg-boot/jeecg-module-system/jeecg-system-biz/src/main/java/org/jeecg/modules/monitor/actuator/undertow/CustomUndertowMetricsHandler.java

@@ -0,0 +1,88 @@
+package org.jeecg.modules.monitor.actuator.undertow;
+
+import io.micrometer.core.instrument.MeterRegistry;
+import io.undertow.server.HttpHandler;
+import io.undertow.server.HttpServerExchange;
+import io.undertow.server.session.*;
+import org.springframework.stereotype.Component;
+
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.LongAdder;
+
+/**
+ * 自定义undertow监控指标工具类
+ * for [QQYUN-11902]tomcat 替换undertow 这里的功能还没修改
+ * @author chenrui
+ * @date 2025/4/8 19:06
+ */
+@Component("jeecgCustomUndertowMetricsHandler")
+public class CustomUndertowMetricsHandler {
+
+    // 用于统计已创建的 session 数量
+    private final LongAdder sessionsCreated = new LongAdder();
+
+    // 用于统计已销毁的 session 数量
+    private final LongAdder sessionsExpired = new LongAdder();
+
+    // 当前活跃的 session 数量
+    private final AtomicInteger activeSessions = new AtomicInteger();
+
+    // 历史最大活跃 session 数
+    private final AtomicInteger maxActiveSessions = new AtomicInteger();
+
+    // Undertow 内存 session 管理器（用于创建与管理 session）
+    private final InMemorySessionManager sessionManager = new InMemorySessionManager("undertow-session-manager");
+
+    // 使用 Cookie 存储 session ID
+    private final SessionConfig sessionConfig = new SessionCookieConfig();
+
+    /**
+     * 构造函数
+     * @param meterRegistry
+     * @author chenrui
+     * @date 2025/4/8 19:07
+     */
+    public CustomUndertowMetricsHandler(MeterRegistry meterRegistry) {
+        // 注册 Micrometer 指标
+        meterRegistry.gauge("undertow.sessions.created", sessionsCreated, LongAdder::longValue);
+        meterRegistry.gauge("undertow.sessions.expired", sessionsExpired, LongAdder::longValue);
+        meterRegistry.gauge("undertow.sessions.active.current", activeSessions, AtomicInteger::get);
+        meterRegistry.gauge("undertow.sessions.active.max", maxActiveSessions, AtomicInteger::get);
+
+        // 添加 session 生命周期监听器，统计 session 创建与销毁
+        sessionManager.registerSessionListener(new SessionListener() {
+            @Override
+            public void sessionCreated(Session session, HttpServerExchange exchange) {
+                sessionsCreated.increment();
+                int now = activeSessions.incrementAndGet();
+                maxActiveSessions.getAndUpdate(max -> Math.max(max, now));
+            }
+
+            @Override
+            public void sessionDestroyed(Session session, HttpServerExchange exchange, SessionDestroyedReason reason) {
+                sessionsExpired.increment();
+                activeSessions.decrementAndGet();
+            }
+        });
+    }
+
+    /**
+     * 包装 Undertow 的 HttpHandler，实现 session 自动创建逻辑
+     * @param next
+     * @return
+     * @author chenrui
+     * @date 2025/4/8 19:07
+     */
+    public HttpHandler wrap(HttpHandler next) {
+        return exchange -> {
+            // 获取当前 session，如果不存在则创建
+            Session session = sessionManager.getSession(exchange, sessionConfig);
+            if (session == null) {
+                sessionManager.createSession(exchange, sessionConfig);
+            }
+
+            // 执行下一个 Handler
+            next.handleRequest(exchange);
+        };
+    }
+}