✨ 定时订阅程序启动后注册的服务

src/main/java/cn/com/xuxiaowei/nacos/sentinel/NacosSentinelApplication.java

@@ -2,7 +2,9 @@ package cn.com.xuxiaowei.nacos.sentinel;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.annotation.EnableScheduling;
 
+@EnableScheduling
 @SpringBootApplication
 public class NacosSentinelApplication {
 

src/main/java/cn/com/xuxiaowei/nacos/sentinel/listener/NacosDiscoveryListener.java

@@ -17,12 +17,11 @@ import org.apache.commons.lang3.RandomStringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.context.event.ApplicationReadyEvent;
 import org.springframework.context.event.EventListener;
+import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
 
-import java.util.ArrayList;
+import java.util.*;
-import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
-import java.util.Properties;
-import java.util.UUID;
 
 /**
  * Nacos 注册中心 监听程序
@@ -34,6 +33,8 @@ import java.util.UUID;
 @Component
 public class NacosDiscoveryListener {
 
+	private final Set<String> subscribes = ConcurrentHashMap.newKeySet();
+
 	private NacosSentinelDiscoveryProperties nacosSentinelDiscoveryProperties;
 
 	private NacosDiscoveryRepository nacosDiscoveryRepository;
@@ -66,7 +67,16 @@ public class NacosDiscoveryListener {
 				namingService = NamingFactory.createNamingService(properties);
 			}
 			catch (NacosException e) {
-				throw new RuntimeException(e);
+				log.error(String.format("【%s】连接 Nacos 异常：", logId), e);
+			}
+			finally {
+				if (namingService == null) {
+					log.error("【{}】NamingService 为 null", logId);
+				}
+				else {
+					String serverStatus = namingService.getServerStatus();
+					log.info("【{}】NamingService 状态：{}，Nacos 连接状态：{}", logId, serverStatus, serverStatus);
+				}
 			}
 		}
 	}
@@ -112,7 +122,40 @@ public class NacosDiscoveryListener {
 		}
 
 		for (String serviceName : serviceNames) {
+			subscribe(serviceName);
+		}
+	}
+
+	@Scheduled(fixedRate = 5000)
+	public void myScheduledMethod() throws NacosException {
+
+		createNamingService();
+
+		int pageNo = nacosSentinelDiscoveryProperties.getPageNo();
+		int pageSize = nacosSentinelDiscoveryProperties.getPageSize();
+		String groupName = nacosSentinelDiscoveryProperties.getGroupName();
+
+		ListView<String> servicesOfServer = namingService.getServicesOfServer(pageNo, pageSize, groupName);
+		List<String> serviceNames = servicesOfServer.getData();
+
+		int maxLength = 0;
+		for (String serviceName : serviceNames) {
+			maxLength = Math.max(maxLength, serviceName.length());
+		}
+
+		for (String serviceName : serviceNames) {
+			if (!subscribes.contains(serviceName)) {
+				subscribe(serviceName);
+			}
+		}
+
+	}
+
+	private void subscribe(String serviceName) throws NacosException {
 		namingService.subscribe(serviceName, event -> {
+
+			subscribes.add(serviceName);
+
 			NamingEvent namingEvent = (NamingEvent) event;
 			List<Instance> instances = namingEvent.getInstances();
 
@@ -130,8 +173,8 @@ public class NacosDiscoveryListener {
 				int port = instance.getPort();
 				String clusterName = instance.getClusterName();
 				log.info("【{}】Nacos 服务名称: {}，IP: {}，端口: {}，群组名称: {}，集群名称: {}", subscribeLogId, serviceName,
-							StringUtils.formatLength(ip, 15), StringUtils.formatLength(port, 5),
+						StringUtils.formatLength(ip, 15), StringUtils.formatLength(port, 5), namingEvent.getGroupName(),
-							namingEvent.getGroupName(), clusterName);
+						clusterName);
 
 				boolean contains = false;
 				for (Discovery discovery : discoveries) {
@@ -199,7 +242,6 @@ public class NacosDiscoveryListener {
 
 		});
 	}
-	}
 
 	private void healthy(String logId, int maxLength, String serviceName, NamingService namingService, boolean healthy)
 			throws NacosException {