refactor: simplify update key logic by using instance ID directly

Author: SteKoe

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

@@ -141,10 +141,7 @@ export default {
   },
   methods: {
     initCacheMetrics() {
-      const updateKey =
-        this.instance.version ??
-        this.instance.statusTimestamp ??
-        this.instance.id;
+      const updateKey = this.instance.id;
       const firstInit = this.currentInstanceId === null;
       if (
         this.instance.id !== this.currentInstanceId ||

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

@@ -106,10 +106,7 @@ export default {
   },
   methods: {
     initDatasourceMetrics() {
-      const updateKey =
-        this.instance.version ??
-        this.instance.statusTimestamp ??
-        this.instance.id;
+      const updateKey = this.instance.id;
       const firstInit = this.currentInstanceId === null;
       if (
         this.instance.id !== this.currentInstanceId ||

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

@@ -123,7 +123,7 @@ export default defineComponent({
     error: null,
     current: null,
     chartData: [],
-    currentInstanceId: null,
+    currentInstanceId: '',
     currentInstanceUpdateKey: null,
   }),
   computed: {
@@ -146,10 +146,7 @@ export default defineComponent({
   },
   methods: {
     initMetrics() {
-      const updateKey =
-        this.instance.version ??
-        this.instance.statusTimestamp ??
-        this.instance.id;
+      const updateKey = this.instance.id;
       const firstInit = this.currentInstanceId === null;
       if (
         this.instance.id !== this.currentInstanceId ||

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

@@ -117,10 +117,7 @@ export default {
   },
   methods: {
     initMetrics() {
-      const updateKey =
-        this.instance.version ??
-        this.instance.statusTimestamp ??
-        this.instance.id;
+      const updateKey = this.instance.id;
       const firstInit = this.currentInstanceId === null;
       if (
         this.instance.id !== this.currentInstanceId ||

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

@@ -115,11 +115,7 @@ export default {
   }),
   computed: {
     instanceUpdateKey() {
-      return (
-        this.instance.version ??
-        this.instance.statusTimestamp ??
-        this.instance.id
-      );
+      return this.instance.id;
     },
     hasCaches() {
       return this.hasMetric('cache.gets');