Error cannot read property data of null #739 (#740)

server/src/controllers/analytics_controller.ts

@@ -3,8 +3,8 @@ import { AnalyticsTask, AnalyticsTaskType, AnalyticsTaskId } from '../models/ana
 import * as AnalyticUnitCache from '../models/analytic_unit_cache_model';
 import * as Segment from '../models/segment_model';
 import * as AnalyticUnit from '../models/analytic_units';
+import { ThresholdAnalyticUnit, AnomalyAnalyticUnit} from '../models/analytic_units';
 import * as Detection from '../models/detection_model';
-import { ThresholdAnalyticUnit } from '../models/analytic_units/threshold_analytic_unit_model';
 import { AnalyticsService } from '../services/analytics_service';
 import { AlertService } from '../services/alert_service';
 import { HASTIC_API_KEY } from '../config';
@@ -14,10 +14,7 @@ import { getNonIntersectedSpans } from '../utils/spans';
 
 import { queryByMetric, GrafanaUnavailable, DatasourceUnavailable } from 'grafana-datasource-kit';
 
-
 import * as _ from 'lodash';
-import { WebhookType } from '../services/notification_service';
-import { AnomalyAnalyticUnit } from '../models/analytic_units/anomaly_analytic_unit_model';
 
 const SECONDS_IN_MINUTE = 60;
 
@@ -658,11 +655,7 @@ export async function getHSR(
     }
 
     let cache = await AnalyticUnitCache.findById(analyticUnit.id);
-    if(
-      cache === null ||
-      cache.data.alpha !== (analyticUnit as AnalyticUnit.AnomalyAnalyticUnit).alpha ||
-      cache.data.confidence !== (analyticUnit as AnalyticUnit.AnomalyAnalyticUnit).confidence
-    ) {
+    if(cache === null || cache.isCacheOutdated(analyticUnit)) {
       await runLearning(analyticUnit.id, from, to);
       cache = await AnalyticUnitCache.findById(analyticUnit.id);
     }

server/src/models/analytic_unit_cache_model.ts

@@ -1,4 +1,4 @@
-import { AnalyticUnitId } from './analytic_units';
+import { AnalyticUnitId, AnalyticUnit } from './analytic_units';
 import { Collection, makeDBQ } from '../services/data_service';
 
 import * as _ from 'lodash';
@@ -33,7 +33,11 @@ export class AnalyticUnitCache {
   }
 
   public getIntersection(): number {
-    if(this.data.windowSize !== undefined) {
+    if(
+        this.data !== undefined &&
+        this.data !== null &&
+        this.data.windowSize !== undefined
+    ) {
       //TODO: return one window size after resolving https://github.com/hastic/hastic-server/issues/508
       if(this.data.timeStep !== undefined) {
         return this.data.windowSize * 2 * this.data.timeStep;
@@ -45,6 +49,11 @@ export class AnalyticUnitCache {
     return 3 * MILLISECONDS_IN_INDEX;
   }
 
+  public isCacheOutdated(analyticUnit: AnalyticUnit) {
+    return !_.every(
+      _.keys(analyticUnit.analyticProps).map(k => _.isEqual(analyticUnit.analyticProps[k], this.data[k]))
+    );
+  }
 }
 
 export async function findById(id: AnalyticUnitId): Promise<AnalyticUnitCache> {

server/src/models/analytic_units/analytic_unit_model.ts

@@ -2,7 +2,6 @@ import { AnalyticUnitId, AnalyticUnitStatus, DetectorType } from './types';
 
 import { Metric } from 'grafana-datasource-kit';
 
-
 export abstract class AnalyticUnit {
 
   public learningAfterUpdateRequired = false;
@@ -78,4 +77,8 @@ export abstract class AnalyticUnit {
     };
   }
 
+  get analyticProps () {
+    return {};
+  }
+
 }

server/src/models/analytic_units/anomaly_analytic_unit_model.ts

@@ -8,7 +8,7 @@ type SeasonalityPeriod = {
   value: number
 }
 
-enum Bound {
+export enum Bound {
   ALL = 'ALL',
   UPPER = 'UPPER',
   LOWER = 'LOWER'
@@ -61,11 +61,7 @@ export class AnomalyAnalyticUnit extends AnalyticUnit {
     const baseObject = super.toObject();
     return {
       ...baseObject,
-      alpha: this.alpha,
-      confidence: this.confidence,
-      seasonality: this.seasonality,
-      seasonalityPeriod: this.seasonalityPeriod,
-      enableBounds: this.enableBounds
+      ...this.analyticProps
     };
   }
 
@@ -73,11 +69,7 @@ export class AnomalyAnalyticUnit extends AnalyticUnit {
     const baseObject = super.toPanelObject();
     return {
       ...baseObject,
-      alpha: this.alpha,
-      confidence: this.confidence,
-      seasonality: this.seasonality,
-      seasonalityPeriod: this.seasonalityPeriod,
-      enableBounds: this.enableBounds
+      ...this.analyticProps
     };
   }
 
@@ -110,4 +102,14 @@ export class AnomalyAnalyticUnit extends AnalyticUnit {
       obj.collapsed
     );
   }
+
+  get analyticProps() {
+    return {
+      alpha: this.alpha,
+      confidence: this.confidence,
+      seasonality: this.seasonality,
+      seasonalityPeriod: this.seasonalityPeriod,  
+      enableBounds: this.enableBounds
+    };
+  }
 }

server/src/models/analytic_units/index.ts

@@ -2,8 +2,8 @@ import { createAnalyticUnitFromObject } from './utils';
 import { AnalyticUnitId, AnalyticUnitStatus, DetectorType, ANALYTIC_UNIT_TYPES } from './types';
 import { AnalyticUnit } from './analytic_unit_model';
 import { PatternAnalyticUnit } from './pattern_analytic_unit_model';
-import { ThresholdAnalyticUnit } from './threshold_analytic_unit_model';
-import { AnomalyAnalyticUnit } from './anomaly_analytic_unit_model';
+import { ThresholdAnalyticUnit, Condition } from './threshold_analytic_unit_model';
+import { AnomalyAnalyticUnit, Bound } from './anomaly_analytic_unit_model';
 import {
   findById,
   findMany,
@@ -19,8 +19,8 @@ import {
 
 export {
   AnalyticUnit, PatternAnalyticUnit, ThresholdAnalyticUnit, AnomalyAnalyticUnit,
-  AnalyticUnitId, AnalyticUnitStatus, DetectorType, ANALYTIC_UNIT_TYPES,
-  createAnalyticUnitFromObject,
+  AnalyticUnitId, AnalyticUnitStatus, Bound, DetectorType, ANALYTIC_UNIT_TYPES,
+  createAnalyticUnitFromObject, Condition,
   findById, findMany,
   create, remove, update,
   setStatus, setDetectionTime, setAlert, setMetric

server/src/models/analytic_units/threshold_analytic_unit_model.ts

@@ -58,8 +58,7 @@ export class ThresholdAnalyticUnit extends AnalyticUnit {
     const baseObject = super.toObject();
     return {
       ...baseObject,
-      value: this.value,
-      condition: this.condition
+      ...this.analyticProps
     };
   }
 
@@ -67,8 +66,7 @@ export class ThresholdAnalyticUnit extends AnalyticUnit {
     const baseObject = super.toPanelObject();
     return {
       ...baseObject,
-      value: this.value,
-      condition: this.condition
+      ...this.analyticProps
     };
   }
 
@@ -98,4 +96,11 @@ export class ThresholdAnalyticUnit extends AnalyticUnit {
       obj.collapsed
     );
   }
+
+  get analyticProps() {
+    return {
+      value: this.value,
+      condition: this.condition
+    }
+  }
 }