mqtt架构

agri-framework/src/main/java/com/agri/framework/interceptor/MqttMessageHandler.java

@@ -33,6 +33,7 @@ import javax.annotation.Resource;
 import java.nio.charset.StandardCharsets;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -178,27 +179,12 @@ public class MqttMessageHandler implements SmartLifecycle {
             throw new MqttException(MqttException.REASON_CODE_CLIENT_NOT_CONNECTED);
         }
 
-        // 关键补充：先确保客户端已连接（如果没连则连接，已连则跳过）
-        // 注意：这里只使用同一个client实例，避免sender与handler使用不同client
-        if (!mqttClient.isConnected()) {
-            try {
-                // 使用注入的连接配置项连接Broker（带用户名密码、自动重连等配置）
-                mqttClient.connect(mqttConnectOptions);
-                log.info("【MQTT连接】客户端已成功连接到Broker，clientId：{}", mqttClient.getClientId());
-            } catch (MqttException e) {
-                log.error("【MQTT连接】连接Broker失败，clientId：{}", mqttClient.getClientId(), e);
-                throw e;
-            }
-        }
-
         // 解析配置的主题列表
-        String[] topics = defaultTopic.split(",");
-        int[] qosArray = new int[topics.length];
-        // 按主题类型设置QoS：控制指令/状态用QoS 1
-        for (int i = 0; i < topics.length; i++) {
-            qosArray[i] = 0;
-            topics[i] = topics[i].trim();
-        }
+        final String[] topicsFinal = Arrays.stream(defaultTopic.split(","))
+                .map(String::trim).toArray(String[]::new);
+        final int[] qosFinal = new int[topicsFinal.length];
+        Arrays.fill(qosFinal, 0);
+
 
         // 设置MQTT消息回调：处理连接断开、消息接收、消息发布完成
         mqttClient.setCallback(new MqttCallbackExtended() {
@@ -206,13 +192,16 @@ public class MqttMessageHandler implements SmartLifecycle {
             public void connectComplete(boolean reconnect, String serverURI) {
                 log.info("【MQTT连接完成】reconnect={}, serverURI={}, clientId={}",
                         reconnect, serverURI, safeClientId());
+                // cleanSession=true：重连后必须补订阅
+                if (reconnect) {
                     try {
-                    mqttClient.subscribe(topics, qosArray);
-                    log.info("【MQTT订阅恢复】topics={}", String.join(",", topics));
+                        mqttClient.subscribe(topicsFinal, qosFinal);
+                        log.info("【MQTT订阅恢复】topicsFinal={}", String.join(",", topicsFinal));
                     } catch (Exception e) {
                         log.error("【MQTT订阅恢复失败】", e);
                     }
                 }
+            }
 
             /**
              * MQTT连接断开回调
@@ -278,11 +267,29 @@ public class MqttMessageHandler implements SmartLifecycle {
 
         // 【方案A关键点】不再 unsubscribe 主题
         // cleanSession=false + unsubscribe 会破坏Broker侧会话订阅；并且自动重连场景更不建议这么做
-
+        // 关键补充：先确保客户端已连接（如果没连则连接，已连则跳过）
+        // 注意：这里只使用同一个client实例，避免sender与handler使用不同client
+        if (!mqttClient.isConnected()) {
+            try {
+                // 使用注入的连接配置项连接Broker（带用户名密码、自动重连等配置）
+                mqttClient.connect(mqttConnectOptions);
+                log.info("【MQTT连接】客户端已成功连接到Broker，clientId：{}", mqttClient.getClientId());
+            } catch (MqttException e) {
+                log.error("【MQTT连接】连接Broker失败，clientId：{}", mqttClient.getClientId(), e);
+                throw e;
+            }
+        }
         // 订阅主题
-        // mqttClient.subscribe(topics, qosArray);
-        // 优化：打印clientId，方便排查
-        log.info("【MQTT初始化】订阅主题完成，clientId：{}，订阅主题：{}", mqttClient.getClientId(), String.join(",", topics));
+        // connect 后首次订阅
+        try {
+            mqttClient.subscribe(topicsFinal, qosFinal);
+            log.info("【MQTT初始化】订阅主题完成，clientId：{}，topicsFinal={}",
+                    mqttClient.getClientId(), String.join(",", topicsFinal));
+        } catch (MqttException e) {
+            log.error("【MQTT初始化】订阅失败，clientId：{}，topicsFinal={}",
+                    safeClientId(), String.join(",", topicsFinal), e);
+            throw e;
+        }
     }
 
     private String safeClientId() {