Add time context to telemetry requests (#5887)

* add time context to telemetry requests

* change to empty array

* refactor telemetry api to use time context

* removed unused function

* add tests

* add test, rename function

* make function public

6 files changed, 185 insertions, 174 deletions

diff --git a/src/api/telemetry/TelemetryAPI.js b/src/api/telemetry/TelemetryAPI.js
index 15cef5b19..c2a392d18 100644
--- a/src/api/telemetry/TelemetryAPI.js
+++ b/src/api/telemetry/TelemetryAPI.js
@@ -27,7 +27,6 @@ import TelemetryMetadataManager from './TelemetryMetadataManager';
 import TelemetryValueFormatter from './TelemetryValueFormatter';
 import DefaultMetadataProvider from './DefaultMetadataProvider';
 import objectUtils from 'objectUtils';
-import _ from 'lodash';
 
 export default class TelemetryAPI {
 
@@ -73,7 +72,7 @@ export default class TelemetryAPI {
      * @returns {boolean} true if the object is a telemetry object.
      */
     isTelemetryObject(domainObject) {
-        return Boolean(this.findMetadataProvider(domainObject));
+        return Boolean(this.#findMetadataProvider(domainObject));
     }
 
     /**
@@ -87,7 +86,7 @@ export default class TelemetryAPI {
      * @memberof module:openmct.TelemetryAPI~TelemetryProvider#
      */
     canProvideTelemetry(domainObject) {
-        return Boolean(this.findSubscriptionProvider(domainObject))
+        return Boolean(this.#findSubscriptionProvider(domainObject))
                 || Boolean(this.findRequestProvider(domainObject));
     }
 
@@ -120,7 +119,7 @@ export default class TelemetryAPI {
     /**
      * @private
      */
-    findSubscriptionProvider() {
+    #findSubscriptionProvider() {
         const args = Array.prototype.slice.apply(arguments);
         function supportsDomainObject(provider) {
             return provider.supportsSubscribe.apply(provider, args);
@@ -130,9 +129,10 @@ export default class TelemetryAPI {
     }
 
     /**
-     * @private
+     * Returns a telemetry request provider that supports
+     * a given domain object and options.
      */
-    findRequestProvider(domainObject) {
+    findRequestProvider() {
         const args = Array.prototype.slice.apply(arguments);
         function supportsDomainObject(provider) {
             return provider.supportsRequest.apply(provider, args);
@@ -144,7 +144,7 @@ export default class TelemetryAPI {
     /**
      * @private
      */
-    findMetadataProvider(domainObject) {
+    #findMetadataProvider(domainObject) {
         return this.metadataProviders.filter(function (p) {
             return p.supportsMetadata(domainObject);
         })[0];
@@ -153,7 +153,7 @@ export default class TelemetryAPI {
     /**
      * @private
      */
-    findLimitEvaluator(domainObject) {
+    #findLimitEvaluator(domainObject) {
         return this.limitProviders.filter(function (p) {
             return p.supportsLimits(domainObject);
         })[0];
@@ -161,6 +161,7 @@ export default class TelemetryAPI {
 
     /**
      * @private
+     * Though used in TelemetryCollection as well
      */
     standardizeRequestOptions(options) {
         if (!Object.prototype.hasOwnProperty.call(options, 'start')) {
@@ -174,6 +175,10 @@ export default class TelemetryAPI {
         if (!Object.prototype.hasOwnProperty.call(options, 'domain')) {
             options.domain = this.openmct.time.timeSystem().key;
         }
+
+        if (!Object.prototype.hasOwnProperty.call(options, 'timeContext')) {
+            options.timeContext = this.openmct.time;
+        }
     }
 
     /**
@@ -241,7 +246,7 @@ export default class TelemetryAPI {
     /**
      * Request historical telemetry for a domain object.
      * The `options` argument allows you to specify filters
-     * (start, end, etc.), sort order, and strategies for retrieving
+     * (start, end, etc.), sort order, time context, and strategies for retrieving
      * telemetry (aggregation, latest available, etc.).
      *
      * @method request
@@ -255,7 +260,7 @@ export default class TelemetryAPI {
      */
     async request(domainObject) {
         if (this.noRequestProviderForAllObjects) {
-            return Promise.resolve([]);
+            return [];
         }
 
         if (arguments.length === 1) {
@@ -273,22 +278,24 @@ export default class TelemetryAPI {
         if (!provider) {
             this.requestAbortControllers.delete(abortController);
 
-            return this.handleMissingRequestProvider(domainObject);
+            return this.#handleMissingRequestProvider(domainObject);
         }
 
         arguments[1] = await this.applyRequestInterceptors(domainObject, arguments[1]);
+        try {
+            const telemetry = await provider.request(...arguments);
+
+            return telemetry;
+        } catch (error) {
+            if (error.name !== 'AbortError') {
+                this.openmct.notifications.error('Error requesting telemetry data, see console for details');
+                console.error(error);
+            }
 
-        return provider.request.apply(provider, arguments)
-            .catch((rejected) => {
-                if (rejected.name !== 'AbortError') {
-                    this.openmct.notifications.error('Error requesting telemetry data, see console for details');
-                    console.error(rejected);
-                }
-
-                return Promise.reject(rejected);
-            }).finally(() => {
-                this.requestAbortControllers.delete(abortController);
-            });
+            throw new Error(error);
+        } finally {
+            this.requestAbortControllers.delete(abortController);
+        }
     }
 
     /**
@@ -306,7 +313,7 @@ export default class TelemetryAPI {
      *          the subscription
      */
     subscribe(domainObject, callback, options) {
-        const provider = this.findSubscriptionProvider(domainObject);
+        const provider = this.#findSubscriptionProvider(domainObject);
 
         if (!this.subscribeCache) {
             this.subscribeCache = {};
@@ -353,7 +360,7 @@ export default class TelemetryAPI {
      */
     getMetadata(domainObject) {
         if (!this.metadataCache.has(domainObject)) {
-            const metadataProvider = this.findMetadataProvider(domainObject);
+            const metadataProvider = this.#findMetadataProvider(domainObject);
             if (!metadataProvider) {
                 return;
             }
@@ -370,33 +377,6 @@ export default class TelemetryAPI {
     }
 
     /**
-     * Return an array of valueMetadatas that are common to all supplied
-     * telemetry objects and match the requested hints.
-     *
-     */
-    commonValuesForHints(metadatas, hints) {
-        const options = metadatas.map(function (metadata) {
-            const values = metadata.valuesForHints(hints);
-
-            return _.keyBy(values, 'key');
-        }).reduce(function (a, b) {
-            const results = {};
-            Object.keys(a).forEach(function (key) {
-                if (Object.prototype.hasOwnProperty.call(b, key)) {
-                    results[key] = a[key];
-                }
-            });
-
-            return results;
-        });
-        const sortKeys = hints.map(function (h) {
-            return 'hints.' + h;
-        });
-
-        return _.sortBy(options, sortKeys);
-    }
-
-    /**
      * Get a value formatter for a given valueMetadata.
      *
      * @returns {TelemetryValueFormatter}
@@ -450,7 +430,7 @@ export default class TelemetryAPI {
      *
      * @returns Promise
      */
-    handleMissingRequestProvider(domainObject) {
+    #handleMissingRequestProvider(domainObject) {
         this.noRequestProviderForAllObjects = this.requestProviders.every(requestProvider => {
             const supportsRequest = requestProvider.supportsRequest.apply(requestProvider, arguments);
             const hasRequestProvider = Object.prototype.hasOwnProperty.call(requestProvider, 'request') && typeof requestProvider.request === 'function';
@@ -540,7 +520,7 @@ export default class TelemetryAPI {
      * @memberof module:openmct.TelemetryAPI~TelemetryProvider#
      */
     getLimitEvaluator(domainObject) {
-        const provider = this.findLimitEvaluator(domainObject);
+        const provider = this.#findLimitEvaluator(domainObject);
         if (!provider) {
             return {
                 evaluate: function () {}
@@ -578,7 +558,7 @@ export default class TelemetryAPI {
      * @memberof module:openmct.TelemetryAPI~TelemetryProvider#
      */
     getLimits(domainObject) {
-        const provider = this.findLimitEvaluator(domainObject);
+        const provider = this.#findLimitEvaluator(domainObject);
         if (!provider || !provider.getLimits) {
             return {
                 limits: function () {
diff --git a/src/api/telemetry/TelemetryAPISpec.js b/src/api/telemetry/TelemetryAPISpec.js
index 5af944009..1362ec0ae 100644
--- a/src/api/telemetry/TelemetryAPISpec.js
+++ b/src/api/telemetry/TelemetryAPISpec.js
@@ -23,11 +23,11 @@ import { createOpenMct, resetApplicationState } from 'utils/testing';
 import TelemetryAPI from './TelemetryAPI';
 import TelemetryCollection from './TelemetryCollection';
 
-describe('Telemetry API', function () {
+describe('Telemetry API', () => {
     let openmct;
     let telemetryAPI;
 
-    beforeEach(function () {
+    beforeEach(() => {
         openmct = {
             time: jasmine.createSpyObj('timeAPI', [
                 'timeSystem',
@@ -47,11 +47,11 @@ describe('Telemetry API', function () {
 
     });
 
-    describe('telemetry providers', function () {
+    describe('telemetry providers', () => {
         let telemetryProvider;
         let domainObject;
 
-        beforeEach(function () {
+        beforeEach(() => {
             telemetryProvider = jasmine.createSpyObj('telemetryProvider', [
                 'supportsSubscribe',
                 'subscribe',
@@ -73,19 +73,16 @@ describe('Telemetry API', function () {
             };
         });
 
-        it('provides consistent results without providers', function (done) {
+        it('provides consistent results without providers', async () => {
             const unsubscribe = telemetryAPI.subscribe(domainObject);
 
             expect(unsubscribe).toEqual(jasmine.any(Function));
 
-            telemetryAPI.request(domainObject)
-                .then((data) => {
-                    expect(data).toEqual([]);
-                })
-                .finally(done);
+            const data = await telemetryAPI.request(domainObject);
+            expect(data).toEqual([]);
         });
 
-        it('skips providers that do not match', function (done) {
+        it('skips providers that do not match', async () => {
             telemetryProvider.supportsSubscribe.and.returnValue(false);
             telemetryProvider.supportsRequest.and.returnValue(false);
             telemetryProvider.request.and.returnValue(Promise.resolve([]));
@@ -98,14 +95,13 @@ describe('Telemetry API', function () {
             expect(telemetryProvider.subscribe).not.toHaveBeenCalled();
             expect(unsubscribe).toEqual(jasmine.any(Function));
 
-            telemetryAPI.request(domainObject).then((response) => {
-                expect(telemetryProvider.supportsRequest)
-                    .toHaveBeenCalledWith(domainObject, jasmine.any(Object));
-                expect(telemetryProvider.request).not.toHaveBeenCalled();
-            }).finally(done);
+            await telemetryAPI.request(domainObject);
+            expect(telemetryProvider.supportsRequest)
+                .toHaveBeenCalledWith(domainObject, jasmine.any(Object));
+            expect(telemetryProvider.request).not.toHaveBeenCalled();
         });
 
-        it('sends subscribe calls to matching providers', function () {
+        it('sends subscribe calls to matching providers', () => {
             const unsubFunc = jasmine.createSpy('unsubscribe');
             telemetryProvider.subscribe.and.returnValue(unsubFunc);
             telemetryProvider.supportsSubscribe.and.returnValue(true);
@@ -133,7 +129,7 @@ describe('Telemetry API', function () {
             expect(callback).not.toHaveBeenCalledWith('otherValue');
         });
 
-        it('subscribes once per object', function () {
+        it('subscribes once per object', () => {
             const unsubFunc = jasmine.createSpy('unsubscribe');
             telemetryProvider.subscribe.and.returnValue(unsubFunc);
             telemetryProvider.supportsSubscribe.and.returnValue(true);
@@ -164,7 +160,7 @@ describe('Telemetry API', function () {
             expect(callbacktwo).not.toHaveBeenCalledWith('anotherValue');
         });
 
-        it('only deletes subscription cache when there are no more subscribers', function () {
+        it('only deletes subscription cache when there are no more subscribers', () => {
             const unsubFunc = jasmine.createSpy('unsubscribe');
             telemetryProvider.subscribe.and.returnValue(unsubFunc);
             telemetryProvider.supportsSubscribe.and.returnValue(true);
@@ -187,7 +183,7 @@ describe('Telemetry API', function () {
             unsubscribeThree();
         });
 
-        it('does subscribe/unsubscribe', function () {
+        it('does subscribe/unsubscribe', () => {
             const unsubFunc = jasmine.createSpy('unsubscribe');
             telemetryProvider.subscribe.and.returnValue(unsubFunc);
             telemetryProvider.supportsSubscribe.and.returnValue(true);
@@ -203,7 +199,7 @@ describe('Telemetry API', function () {
             unsubscribe();
         });
 
-        it('subscribes for different object', function () {
+        it('subscribes for different object', () => {
             const unsubFuncs = [];
             const notifiers = [];
             telemetryProvider.supportsSubscribe.and.returnValue(true);
@@ -243,120 +239,120 @@ describe('Telemetry API', function () {
             expect(unsubFuncs[1]).toHaveBeenCalled();
         });
 
-        it('sends requests to matching providers', function (done) {
+        it('sends requests to matching providers', async () => {
             const telemPromise = Promise.resolve([]);
             telemetryProvider.supportsRequest.and.returnValue(true);
             telemetryProvider.request.and.returnValue(telemPromise);
             telemetryAPI.addProvider(telemetryProvider);
 
-            telemetryAPI.request(domainObject).then(() => {
-                expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
-                    domainObject,
-                    jasmine.any(Object)
-                );
-                expect(telemetryProvider.request).toHaveBeenCalledWith(
-                    domainObject,
-                    jasmine.any(Object)
-                );
-            }).finally(done);
+            await telemetryAPI.request(domainObject);
+            expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
+                domainObject,
+                jasmine.any(Object)
+            );
+            expect(telemetryProvider.request).toHaveBeenCalledWith(
+                domainObject,
+                jasmine.any(Object)
+            );
         });
 
-        it('generates default request options', function (done) {
+        it('generates default request options', async () => {
             telemetryProvider.supportsRequest.and.returnValue(true);
             telemetryProvider.request.and.returnValue(Promise.resolve([]));
             telemetryAPI.addProvider(telemetryProvider);
 
-            telemetryAPI.request(domainObject).then(() => {
-                const { signal } = new AbortController();
-                expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
-                    jasmine.any(Object),
-                    {
-                        signal,
-                        start: 0,
-                        end: 1,
-                        domain: 'system'
-                    }
-                );
-
-                expect(telemetryProvider.request).toHaveBeenCalledWith(
-                    jasmine.any(Object),
-                    {
-                        signal,
-                        start: 0,
-                        end: 1,
-                        domain: 'system'
-                    }
-                );
-
-                telemetryProvider.supportsRequest.calls.reset();
-                telemetryProvider.request.calls.reset();
-
-                telemetryAPI.request(domainObject, {}).then(() => {
-                    expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
-                        jasmine.any(Object),
-                        {
-                            signal,
-                            start: 0,
-                            end: 1,
-                            domain: 'system'
-                        }
-                    );
-
-                    expect(telemetryProvider.request).toHaveBeenCalledWith(
-                        jasmine.any(Object),
-                        {
-                            signal,
-                            start: 0,
-                            end: 1,
-                            domain: 'system'
-                        }
-                    );
-                });
-            }).finally(done);
+            await telemetryAPI.request(domainObject);
+            const { signal } = new AbortController();
+            expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
+                jasmine.any(Object),
+                {
+                    signal,
+                    start: 0,
+                    end: 1,
+                    domain: 'system',
+                    timeContext: jasmine.any(Object)
+                }
+            );
+
+            expect(telemetryProvider.request).toHaveBeenCalledWith(
+                jasmine.any(Object),
+                {
+                    signal,
+                    start: 0,
+                    end: 1,
+                    domain: 'system',
+                    timeContext: jasmine.any(Object)
+                }
+            );
+
+            telemetryProvider.supportsRequest.calls.reset();
+            telemetryProvider.request.calls.reset();
+
+            await telemetryAPI.request(domainObject, {});
+            expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
+                jasmine.any(Object),
+                {
+                    signal,
+                    start: 0,
+                    end: 1,
+                    domain: 'system',
+                    timeContext: jasmine.any(Object)
+                }
+            );
 
+            expect(telemetryProvider.request).toHaveBeenCalledWith(
+                jasmine.any(Object),
+                {
+                    signal,
+                    start: 0,
+                    end: 1,
+                    domain: 'system',
+                    timeContext: jasmine.any(Object)
+                }
+            );
         });
 
-        it('do not overwrite existing request options', function (done) {
+        it('do not overwrite existing request options', async () => {
             telemetryProvider.supportsRequest.and.returnValue(true);
             telemetryProvider.request.and.returnValue(Promise.resolve([]));
             telemetryAPI.addProvider(telemetryProvider);
 
-            telemetryAPI.request(domainObject, {
+            await telemetryAPI.request(domainObject, {
                 start: 20,
                 end: 30,
                 domain: 'someDomain'
-            }).then(() => {
-                const { signal } = new AbortController();
-                expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
-                    jasmine.any(Object),
-                    {
-                        start: 20,
-                        end: 30,
-                        domain: 'someDomain',
-                        signal
-                    }
-                );
-
-                expect(telemetryProvider.request).toHaveBeenCalledWith(
-                    jasmine.any(Object),
-                    {
-                        start: 20,
-                        end: 30,
-                        domain: 'someDomain',
-                        signal
-                    }
-                );
+            });
+            const { signal } = new AbortController();
+            expect(telemetryProvider.supportsRequest).toHaveBeenCalledWith(
+                jasmine.any(Object),
+                {
+                    start: 20,
+                    end: 30,
+                    domain: 'someDomain',
+                    signal,
+                    timeContext: jasmine.any(Object)
+                }
+            );
 
-            }).finally(done);
+            expect(telemetryProvider.request).toHaveBeenCalledWith(
+                jasmine.any(Object),
+                {
+                    start: 20,
+                    end: 30,
+                    domain: 'someDomain',
+                    signal,
+                    timeContext: jasmine.any(Object)
+                }
+            );
         });
     });
 
-    describe('metadata', function () {
+    describe('metadata', () => {
         let mockMetadata = {};
         let mockObjectType = {
             definition: {}
         };
-        beforeEach(function () {
+        beforeEach(() => {
             telemetryAPI.addProvider({
                 key: 'mockMetadataProvider',
                 supportsMetadata() {
@@ -369,7 +365,7 @@ describe('Telemetry API', function () {
             openmct.types.get.and.returnValue(mockObjectType);
         });
 
-        it('respects explicit priority', function () {
+        it('respects explicit priority', () => {
             mockMetadata.values = [
                 {
                     key: "name",
@@ -408,7 +404,7 @@ describe('Telemetry API', function () {
                 expect(value.hints.priority).toBe(index + 1);
             });
         });
-        it('if no explicit priority, defaults to order defined', function () {
+        it('if no explicit priority, defaults to order defined', () => {
             mockMetadata.values = [
                 {
                     key: "name",
@@ -435,7 +431,7 @@ describe('Telemetry API', function () {
                 expect(value.key).toBe(mockMetadata.values[index].key);
             });
         });
-        it('respects domain priority', function () {
+        it('respects domain priority', () => {
             mockMetadata.values = [
                 {
                     key: "name",
@@ -477,7 +473,7 @@ describe('Telemetry API', function () {
             expect(values[0].key).toBe('timestamp-local');
             expect(values[1].key).toBe('timestamp-utc');
         });
-        it('respects range priority', function () {
+        it('respects range priority', () => {
             mockMetadata.values = [
                 {
                     key: "name",
@@ -519,7 +515,7 @@ describe('Telemetry API', function () {
             expect(values[0].key).toBe('cos');
             expect(values[1].key).toBe('sin');
         });
-        it('respects priority and domain ordering', function () {
+        it('respects priority and domain ordering', () => {
             mockMetadata.values = [
                 {
                     key: "id",
@@ -588,7 +584,7 @@ describe('Telemetry API', function () {
             definition: {}
         };
 
-        beforeEach(function () {
+        beforeEach(() => {
             openmct.telemetry = telemetryAPI;
             telemetryAPI.addProvider({
                 key: 'mockMetadataProvider',
@@ -644,16 +640,14 @@ describe('Telemetery', () => {
         return resetApplicationState(openmct);
     });
 
-    it('should not abort request without navigation', function (done) {
+    it('should not abort request without navigation', async () => {
         telemetryAPI.addProvider(telemetryProvider);
 
-        telemetryAPI.request({}).finally(() => {
-            expect(watchedSignal.aborted).toBe(false);
-            done();
-        });
+        await telemetryAPI.request({});
+        expect(watchedSignal.aborted).toBe(false);
     });
 
-    it('should abort request on navigation', function (done) {
+    it('should abort request on navigation', (done) => {
         telemetryAPI.addProvider(telemetryProvider);
 
         telemetryAPI.request({}).finally(() => {
diff --git a/src/api/time/TimeAPISpec.js b/src/api/time/TimeAPISpec.js
index c7dea1081..5108cf449 100644
--- a/src/api/time/TimeAPISpec.js
+++ b/src/api/time/TimeAPISpec.js
@@ -229,6 +229,25 @@ describe("The Time API", function () {
             expect(api.clock()).toBeUndefined();
         });
 
+        it('Provides a default time context', () => {
+            const timeContext = api.getContextForView([]);
+            expect(timeContext).not.toBe(null);
+        });
+
+        it("Without a clock, is in fixed time mode", () => {
+            const timeContext = api.getContextForView([]);
+            expect(timeContext.isRealTime()).toBe(false);
+        });
+
+        it("Provided a clock, is in real-time mode", () => {
+            const timeContext = api.getContextForView([]);
+            timeContext.clock('mts', {
+                start: 0,
+                end: 1
+            });
+            expect(timeContext.isRealTime()).toBe(true);
+        });
+
     });
 
     it("on tick, observes offsets, and indicates tick in bounds callback", function () {
diff --git a/src/api/time/TimeContext.js b/src/api/time/TimeContext.js
index 29f95b72a..520540b2b 100644
--- a/src/api/time/TimeContext.js
+++ b/src/api/time/TimeContext.js
@@ -362,6 +362,18 @@ class TimeContext extends EventEmitter {
         this.boundsVal = newBounds;
         this.emit('bounds', this.boundsVal, true);
     }
+
+    /**
+     * Checks if this time context is in real-time mode or not.
+     * @returns {boolean} true if this context is in real-time mode, false if not
+    */
+    isRealTime() {
+        if (this.clock()) {
+            return true;
+        }
+
+        return false;
+    }
 }
 
 export default TimeContext;
diff --git a/src/plugins/LADTable/components/LADRow.vue b/src/plugins/LADTable/components/LADRow.vue
index 929a4e201..3468c870b 100644
--- a/src/plugins/LADTable/components/LADRow.vue
+++ b/src/plugins/LADTable/components/LADRow.vue
@@ -114,6 +114,8 @@ export default {
         this.formats = this.openmct.telemetry.getFormatMap(this.metadata);
         this.keyString = this.openmct.objects.makeKeyString(this.domainObject.identifier);
 
+        this.timeContext = this.openmct.time.getContextForView(this.objectPath);
+
         this.limitEvaluator = this.openmct
             .telemetry
             .limitEvaluator(this.domainObject);
@@ -134,7 +136,8 @@ export default {
 
         this.telemetryCollection = this.openmct.telemetry.requestCollection(this.domainObject, {
             size: 1,
-            strategy: 'latest'
+            strategy: 'latest',
+            timeContext: this.timeContext
         });
         this.telemetryCollection.on('add', this.setLatestValues);
         this.telemetryCollection.on('clear', this.resetValues);
diff --git a/src/plugins/displayLayout/components/TelemetryView.vue b/src/plugins/displayLayout/components/TelemetryView.vue
index 8ae30d913..24bd7bce0 100644
--- a/src/plugins/displayLayout/components/TelemetryView.vue
+++ b/src/plugins/displayLayout/components/TelemetryView.vue
@@ -282,12 +282,15 @@ export default {
             this.limitEvaluator = this.openmct.telemetry.limitEvaluator(this.domainObject);
             this.formats = this.openmct.telemetry.getFormatMap(this.metadata);
 
+            this.timeContext = this.openmct.time.getContextForView(this.objectPath);
+
             const valueMetadata = this.metadata ? this.metadata.value(this.item.value) : {};
             this.customStringformatter = this.openmct.telemetry.customStringFormatter(valueMetadata, this.item.format);
 
             this.telemetryCollection = this.openmct.telemetry.requestCollection(this.domainObject, {
                 size: 1,
-                strategy: 'latest'
+                strategy: 'latest',
+                timeContext: this.timeContext
             });
             this.telemetryCollection.on('add', this.setLatestValues);
             this.telemetryCollection.on('clear', this.refreshData);