Merge "App metrics visualization manage"

[portal/ric-dashboard.git] / dashboard / webapp-frontend / src / app / stats / stats-datasource.ts

diff --git a/dashboard/webapp-frontend/src/app/stats/stats-datasource.ts b/dashboard/webapp-frontend/src/app/stats/stats-datasource.ts
new file mode 100644 (file)
index 0000000..e9dcda1
--- /dev/null
+++ b/dashboard/webapp-frontend/src/app/stats/stats-datasource.ts
@@ -0,0 +1,73 @@
+/*-
+ * ========================LICENSE_START=================================
+ * O-RAN-SC
+ * %%
+ * Copyright (C) 2020 AT&T Intellectual Property
+ * %%
+ * 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
+ * 
+ *      http://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.
+ * ========================LICENSE_END===================================
+ */
+
+import { CollectionViewer, DataSource } from '@angular/cdk/collections';
+import { HttpErrorResponse } from '@angular/common/http';
+import { Observable } from 'rxjs/Observable';
+import { BehaviorSubject } from 'rxjs/BehaviorSubject';
+import { of } from 'rxjs/observable/of';
+import { catchError, finalize } from 'rxjs/operators';
+import { E2RanDetails, StatsDetails } from '../interfaces/e2-mgr.types';
+import { E2ManagerService } from '../services/e2-mgr/e2-mgr.service';
+import { NotificationService } from '../services/ui/notification.service';
+import { StatsService } from '../services/stats/stats.service';
+
+export class StatsDataSource extends DataSource<StatsDetails> {
+
+  private statsSubject = new BehaviorSubject<StatsDetails[]>([]);
+
+  private loadingSubject = new BehaviorSubject<boolean>(false);
+
+  public loading$ = this.loadingSubject.asObservable();
+
+  public rowCount = 1; // hide footer during intial load
+
+  constructor(private statsService: StatsService,
+    private notificationService: NotificationService) {
+    super();
+  }
+
+  loadTable(instanceKey: string) {
+    this.loadingSubject.next(true);
+    this.statsService.getAppMetrics(instanceKey)
+      .pipe(
+        catchError( (her: HttpErrorResponse) => {
+          console.log('StatsDataSource failed: ' + her.message);
+          this.notificationService.error('Failed to get Stats details: ' + her.message);
+          return of([]);
+        }),
+        finalize( () =>  this.loadingSubject.next(false) )
+      )
+      .subscribe( (stat: StatsDetails[] ) => {
+        this.rowCount = stat.length;
+        this.statsSubject.next(stat);
+      });
+  }
+
+  connect(collectionViewer: CollectionViewer): Observable<StatsDetails[]> {
+    return this.statsSubject.asObservable();
+  }
+
+  disconnect(collectionViewer: CollectionViewer): void {
+    this.statsSubject.complete();
+    this.loadingSubject.complete();
+  }
+
+}