feat(#5352): healthgroups endpoint

spring-boot-admin-server-ui/src/main/frontend/services/instance.ts

@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { AxiosError, AxiosInstance } from 'axios';
+import { AxiosError, AxiosInstance, AxiosResponse } from 'axios';
 import saveAs from 'file-saver';
 import { Observable, concat, from, ignoreElements } from 'rxjs';
 
@@ -231,6 +231,10 @@ class Instance {
     });
   }
 
+  async fetchCachedHealthGroups(): Promise<AxiosResponse<string[]>> {
+    return this.axios.get<string[]>('health-groups');
+  }
+
   async fetchHealthGroup(groupName: string) {
     return await this.axios.get(uri`actuator/health/${groupName}`, {
       validateStatus: null,

spring-boot-admin-server-ui/src/main/frontend/views/instances/details/details-health.spec.ts

@@ -13,10 +13,10 @@ describe('DetailsHealth', () => {
     const application = new Application(applications[0]);
     const instance = application.instances[0];
 
-    // Mock fetchHealth for groups (will be called once on mount)
-    instance.fetchHealth = vi
+    // Mock fetchCachedHealthGroups for groups (will be called once on mount)
+    instance.fetchCachedHealthGroups = vi
       .fn()
-      .mockResolvedValue({ data: { status: 'UP', groups: ['liveness'] } });
+      .mockResolvedValue({ data: ['liveness'] });
 
     render(DetailsHealth, {
       props: {
@@ -32,9 +32,9 @@ describe('DetailsHealth', () => {
     const application = new Application(applications[0]);
     const instance = application.instances[0];
 
-    instance.fetchHealth = vi
+    instance.fetchCachedHealthGroups = vi
       .fn()
-      .mockResolvedValue({ data: { status: 'UP', groups: ['liveness'] } });
+      .mockResolvedValue({ data: ['liveness'] });
 
     render(DetailsHealth, {
       props: {
@@ -56,9 +56,9 @@ describe('DetailsHealth', () => {
   it('should update when instance prop changes', async () => {
     const application = new Application(applications[0]);
     const instance1 = application.instances[0];
-    instance1.fetchHealth = vi
+    instance1.fetchCachedHealthGroups = vi
       .fn()
-      .mockResolvedValue({ data: { status: 'UP', groups: ['liveness'] } });
+      .mockResolvedValue({ data: ['liveness'] });
 
     const { rerender } = render(DetailsHealth, {
       props: {
@@ -78,9 +78,7 @@ describe('DetailsHealth', () => {
         },
       ],
     }).instances[0];
-    instance2.fetchHealth = vi
-      .fn()
-      .mockResolvedValue({ data: { status: 'DOWN', groups: [] } });
+    instance2.fetchCachedHealthGroups = vi.fn().mockResolvedValue({ data: [] });
 
     await rerender({ instance: instance2 });
 
@@ -92,9 +90,9 @@ describe('DetailsHealth', () => {
     const application = new Application(applications[0]);
     const instance = application.instances[0];
     instance.statusInfo = { status: 'UP', details: {} };
-    instance.fetchHealth = vi
+    instance.fetchCachedHealthGroups = vi
       .fn()
-      .mockResolvedValue({ data: { status: 'UP', groups: ['liveness'] } });
+      .mockResolvedValue({ data: ['liveness'] });
 
     render(DetailsHealth, {
       props: {
@@ -107,22 +105,22 @@ describe('DetailsHealth', () => {
   });
 
   describe('SSE reactive updates', () => {
-    it('should call fetchHealth once on mount, not on SSE version changes', async () => {
+    it('should re-fetch cached health groups on SSE version changes', async () => {
       const baseApp = applications[0];
       const instance1 = new Application(baseApp).instances[0];
-      const fetchHealthSpy1 = vi.spyOn(instance1, 'fetchHealth');
-      fetchHealthSpy1.mockResolvedValue({
-        data: { status: 'UP', groups: ['liveness'] },
-      } as AxiosResponse);
+      instance1.fetchCachedHealthGroups = vi
+        .fn()
+        .mockResolvedValue({ data: ['liveness'] });
 
       const { rerender } = render(DetailsHealth, {
         props: { instance: instance1 },
       });
 
       await screen.findAllByRole('status');
-      expect(fetchHealthSpy1).toHaveBeenCalledTimes(1);
+      expect(instance1.fetchCachedHealthGroups).toHaveBeenCalledTimes(1);
 
-      // Same instance, different version (SSE update) — should NOT call fetchHealth again
+      // Same instance, different version (SSE update) — should re-fetch the
+      // (server-cached) group list so it self-corrects when groups change.
       const instance2 = new Application({
         ...baseApp,
         instances: [
@@ -133,24 +131,25 @@ describe('DetailsHealth', () => {
           },
         ],
       }).instances[0];
-      const fetchHealthSpy2 = vi.spyOn(instance2, 'fetchHealth');
-      fetchHealthSpy2.mockResolvedValue({
-        data: { status: 'DOWN', groups: [] },
-      } as AxiosResponse);
+      instance2.fetchCachedHealthGroups = vi
+        .fn()
+        .mockResolvedValue({ data: ['liveness', 'readiness'] });
 
       await rerender({ instance: instance2 });
 
-      // Original instance's spy should still be 1 (no additional calls)
-      expect(fetchHealthSpy1).toHaveBeenCalledTimes(1);
+      // The new instance's cached groups should have been fetched on the SSE update.
+      await waitFor(() => {
+        expect(instance2.fetchCachedHealthGroups).toHaveBeenCalledTimes(1);
+      });
     });
 
-    it('should reactively update through multiple SSE status changes without extra HTTP calls', async () => {
+    it('should reactively update health status and details through SSE status changes', async () => {
       const baseApp = applications[0];
 
       const instance1 = new Application(baseApp).instances[0];
-      instance1.fetchHealth = vi
+      instance1.fetchCachedHealthGroups = vi
         .fn()
-        .mockResolvedValue({ data: { status: 'UP', groups: ['liveness'] } });
+        .mockResolvedValue({ data: ['liveness'] });
 
       const { rerender } = render(DetailsHealth, {
         props: { instance: instance1 },
@@ -178,9 +177,9 @@ describe('DetailsHealth', () => {
           },
         ],
       }).instances[0];
-      instance2.fetchHealth = vi
+      instance2.fetchCachedHealthGroups = vi
         .fn()
-        .mockResolvedValue({ data: { status: 'DOWN', groups: [] } });
+        .mockResolvedValue({ data: [] });
 
       await rerender({ instance: instance2 });
 
@@ -197,8 +196,8 @@ describe('DetailsHealth', () => {
     it('should display health group buttons after mount', async () => {
       const application = new Application(applications[0]);
       const instance = application.instances[0];
-      instance.fetchHealth = vi.fn().mockResolvedValue({
-        data: { status: 'UP', groups: ['liveness', 'readiness'] },
+      instance.fetchCachedHealthGroups = vi.fn().mockResolvedValue({
+        data: ['liveness', 'readiness'],
       });
       const fetchGroupSpy = vi.spyOn(instance, 'fetchHealthGroup');
 
@@ -220,8 +219,8 @@ describe('DetailsHealth', () => {
     it('should fetch group details on first click', async () => {
       const application = new Application(applications[0]);
       const instance = application.instances[0];
-      instance.fetchHealth = vi.fn().mockResolvedValue({
-        data: { status: 'UP', groups: ['custom-group'] },
+      instance.fetchCachedHealthGroups = vi.fn().mockResolvedValue({
+        data: ['custom-group'],
       });
       const fetchGroupSpy = vi.spyOn(instance, 'fetchHealthGroup');
       fetchGroupSpy.mockResolvedValue({
@@ -270,8 +269,8 @@ describe('DetailsHealth', () => {
     it('should toggle group visibility after data is loaded', async () => {
       const application = new Application(applications[0]);
       const instance = application.instances[0];
-      instance.fetchHealth = vi.fn().mockResolvedValue({
-        data: { status: 'UP', groups: ['custom-group'] },
+      instance.fetchCachedHealthGroups = vi.fn().mockResolvedValue({
+        data: ['custom-group'],
       });
       const fetchGroupSpy = vi.spyOn(instance, 'fetchHealthGroup');
       fetchGroupSpy.mockResolvedValue({
@@ -309,8 +308,8 @@ describe('DetailsHealth', () => {
     it('should not show groups when none exist', async () => {
       const application = new Application(applications[0]);
       const instance = application.instances[0];
-      instance.fetchHealth = vi.fn().mockResolvedValue({
-        data: { status: 'UP', groups: [] },
+      instance.fetchCachedHealthGroups = vi.fn().mockResolvedValue({
+        data: [],
       });
 
       render(DetailsHealth, {
@@ -326,16 +325,16 @@ describe('DetailsHealth', () => {
 
     it('should re-fetch groups when instance id changes', async () => {
       const app1 = new Application(applications[0]).instances[0];
-      app1.fetchHealth = vi
+      app1.fetchCachedHealthGroups = vi
         .fn()
-        .mockResolvedValue({ data: { status: 'UP', groups: ['liveness'] } });
+        .mockResolvedValue({ data: ['liveness'] });
 
       const { rerender } = render(DetailsHealth, {
         props: { instance: app1 },
       });
 
       await waitFor(() => {
-        expect(app1.fetchHealth).toHaveBeenCalledTimes(1);
+        expect(app1.fetchCachedHealthGroups).toHaveBeenCalledTimes(1);
       });
 
       const app2 = new Application({
@@ -347,18 +346,18 @@ describe('DetailsHealth', () => {
           },
         ],
       }).instances[0];
-      app2.fetchHealth = vi
+      app2.fetchCachedHealthGroups = vi
         .fn()
-        .mockResolvedValue({ data: { status: 'UP', groups: ['readiness'] } });
+        .mockResolvedValue({ data: ['readiness'] });
 
       await rerender({ instance: app2 });
 
       await waitFor(() => {
-        expect(app2.fetchHealth).toHaveBeenCalledTimes(1);
+        expect(app2.fetchCachedHealthGroups).toHaveBeenCalledTimes(1);
       });
 
       // Original instance should still have only 1 call
-      expect(app1.fetchHealth).toHaveBeenCalledTimes(1);
+      expect(app1.fetchCachedHealthGroups).toHaveBeenCalledTimes(1);
     });
   });
 });

spring-boot-admin-server-ui/src/main/frontend/views/instances/details/details-health.vue

@@ -175,15 +175,9 @@ export default defineComponent({
         this.healthGroupOpenStatus = {};
         this.healthGroupLoadingMap = {};
         this.healthGroupsError = null;
-        this.fetchHealthGroups();
-      } else {
-        // Same instance, SSE update (e.g. status change) — collapse groups and clear stale data
-        for (const group of this.healthGroups) {
-          group.data = null;
-        }
-        this.healthGroupOpenStatus = {};
-        this.healthGroupLoadingMap = {};
       }
+      // Re-fetch the (server-cached) group list on every instance change
+      this.fetchHealthGroups();
     },
     isHealthGroupOpen(groupName: string) {
       return this.healthGroupOpenStatus[groupName]?.isOpen ?? false;
@@ -214,10 +208,10 @@ export default defineComponent({
       this.healthGroupsError = null;
 
       try {
-        const res = await this.instance.fetchHealth();
+        const res = await this.instance.fetchCachedHealthGroups();
 
-        if (Array.isArray(res.data.groups)) {
-          this.healthGroups = res.data.groups.map((name: string) => ({
+        if (Array.isArray(res.data)) {
+          this.healthGroups = res.data.map((name: string) => ({
             name,
             data: null,
           }));

spring-boot-admin-server/src/main/java/de/codecentric/boot/admin/server/config/AdminServerAutoConfiguration.java

@@ -42,6 +42,9 @@
 import de.codecentric.boot.admin.server.services.EndpointDetectionTrigger;
 import de.codecentric.boot.admin.server.services.EndpointDetector;
 import de.codecentric.boot.admin.server.services.HashingInstanceUrlIdGenerator;
+import de.codecentric.boot.admin.server.services.HealthGroupsCache;
+import de.codecentric.boot.admin.server.services.HealthGroupsCacheCleanupTrigger;
+import de.codecentric.boot.admin.server.services.InMemoryHealthGroupsCache;
 import de.codecentric.boot.admin.server.services.InfoUpdateTrigger;
 import de.codecentric.boot.admin.server.services.InfoUpdater;
 import de.codecentric.boot.admin.server.services.InstanceFilter;
@@ -96,13 +99,19 @@ public InstanceIdGenerator instanceIdGenerator() {
 		return new HashingInstanceUrlIdGenerator();
 	}
 
+	@Bean
+	@ConditionalOnMissingBean
+	public HealthGroupsCache healthGroupsCache() {
+		return new InMemoryHealthGroupsCache();
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public StatusUpdater statusUpdater(InstanceRepository instanceRepository,
-			InstanceWebClient.Builder instanceWebClientBuilder) {
+			InstanceWebClient.Builder instanceWebClientBuilder, HealthGroupsCache healthGroupsCache) {
 
 		StatusUpdater updater = new StatusUpdater(instanceRepository, instanceWebClientBuilder.build(),
-				new ApiMediaTypeHandler());
+				new ApiMediaTypeHandler(), healthGroupsCache);
 
 		AdminServerProperties.MonitorProperties monitorProperties = this.adminServerProperties.getMonitor();
 
@@ -136,6 +145,13 @@ public StatusUpdateTrigger statusUpdateTrigger(StatusUpdater statusUpdater, Publ
 				monitorProperties.getStatusMaxBackoff());
 	}
 
+	@Bean(initMethod = "start", destroyMethod = "stop")
+	@ConditionalOnMissingBean
+	public HealthGroupsCacheCleanupTrigger healthGroupsCacheCleanupTrigger(Publisher<InstanceEvent> events,
+			HealthGroupsCache healthGroupsCache) {
+		return new HealthGroupsCacheCleanupTrigger(events, healthGroupsCache);
+	}
+
 	@Bean
 	@ConditionalOnMissingBean
 	public EndpointDetector endpointDetector(InstanceRepository instanceRepository,

spring-boot-admin-server/src/main/java/de/codecentric/boot/admin/server/config/AdminServerWebConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2024 the original author or authors.
+ * Copyright 2014-2025 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,7 @@
 
 import de.codecentric.boot.admin.server.eventstore.InstanceEventStore;
 import de.codecentric.boot.admin.server.services.ApplicationRegistry;
+import de.codecentric.boot.admin.server.services.HealthGroupsCache;
 import de.codecentric.boot.admin.server.services.InstanceRegistry;
 import de.codecentric.boot.admin.server.utils.jackson.AdminServerModule;
 import de.codecentric.boot.admin.server.web.ApplicationsController;
@@ -51,8 +52,9 @@ public SimpleModule adminJacksonModule() {
 
 	@Bean
 	@ConditionalOnMissingBean
-	public InstancesController instancesController(InstanceRegistry instanceRegistry, InstanceEventStore eventStore) {
-		return new InstancesController(instanceRegistry, eventStore);
+	public InstancesController instancesController(InstanceRegistry instanceRegistry, InstanceEventStore eventStore,
+			HealthGroupsCache healthGroupsCache) {
+		return new InstancesController(instanceRegistry, eventStore, healthGroupsCache);
 	}
 
 	@Bean

spring-boot-admin-server/src/main/java/de/codecentric/boot/admin/server/services/HealthGroupsCache.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2014-2025 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package de.codecentric.boot.admin.server.services;
+
+import java.util.List;
+
+import de.codecentric.boot.admin.server.domain.values.InstanceId;
+
+/**
+ * Cache for health groups per instance.
+ */
+public interface HealthGroupsCache {
+
+	/**
+	 * Update the health groups for an instance. If groups is null or empty, the entry is
+	 * removed from the cache.
+	 * @param instanceId the instance id
+	 * @param groups the health groups list
+	 */
+	void updateGroups(InstanceId instanceId, List<String> groups);
+
+	/**
+	 * Get the health groups for an instance.
+	 * @param instanceId the instance id
+	 * @return the list of health groups, or an empty list if none are cached
+	 */
+	List<String> getGroups(InstanceId instanceId);
+
+	/**
+	 * Remove the health groups entry for an instance.
+	 * @param instanceId the instance id
+	 */
+	void remove(InstanceId instanceId);
+
+}