[Infra] Add getMetricIndices to start contract (#131326)

* [Infra] Add getMetricIndices to start contract (#131246)

* Remove temporary return variable, change variable name

* Address review comments

* Use Jest Promise mock shorthand

Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>

x-pack/plugins/infra/server/lib/metrics/make_get_metric_indices.test.ts

@@ -0,0 +1,30 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { savedObjectsClientMock } from '@kbn/core/server/mocks';
+import { defaultSourceConfiguration, InfraSource } from '../sources';
+import { createInfraSourcesMock } from '../sources/mocks';
+import { makeGetMetricIndices } from './make_get_metric_indices';
+
+describe('getMetricIndices', () => {
+  it('should return the indices from a resolved configuration', async () => {
+    const sourceConfiguration: InfraSource = {
+      id: 'default',
+      origin: 'stored',
+      configuration: defaultSourceConfiguration,
+    };
+    const infraSourcesMock = createInfraSourcesMock();
+    infraSourcesMock.getSourceConfiguration.mockResolvedValueOnce(sourceConfiguration);
+
+    const getMetricIndices = makeGetMetricIndices(infraSourcesMock);
+
+    const savedObjectsClient = savedObjectsClientMock.create();
+    const metricIndices = await getMetricIndices(savedObjectsClient);
+
+    expect(metricIndices).toEqual(defaultSourceConfiguration.metricAlias);
+  });
+});

x-pack/plugins/infra/server/lib/metrics/make_get_metric_indices.ts

@@ -0,0 +1,16 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import type { SavedObjectsClientContract } from '@kbn/core/server';
+import type { IInfraSources } from '../sources';
+
+export function makeGetMetricIndices(metricSources: IInfraSources) {
+  return async (savedObjectsClient: SavedObjectsClientContract, sourceId: string = 'default') => {
+    const source = await metricSources.getSourceConfiguration(savedObjectsClient, sourceId);
+    return source.configuration.metricAlias;
+  };
+}

x-pack/plugins/infra/server/plugin.ts

@@ -7,8 +7,6 @@
 
 import { Server } from '@hapi/hapi';
 import { schema } from '@kbn/config-schema';
-import { i18n } from '@kbn/i18n';
-import { Logger } from '@kbn/logging';
 import {
   CoreStart,
   Plugin,
@@ -16,6 +14,8 @@ import {
   PluginInitializerContext,
 } from '@kbn/core/server';
 import { handleEsError } from '@kbn/es-ui-shared-plugin/server';
+import { i18n } from '@kbn/i18n';
+import { Logger } from '@kbn/logging';
 import { LOGS_FEATURE_ID, METRICS_FEATURE_ID } from '../common/constants';
 import { defaultLogViewsStaticConfig } from '../common/log_views';
 import { publicConfigKeys } from '../common/plugin_config_types';
@@ -35,6 +35,7 @@ import { InfraFieldsDomain } from './lib/domains/fields_domain';
 import { InfraLogEntriesDomain } from './lib/domains/log_entries_domain';
 import { InfraMetricsDomain } from './lib/domains/metrics_domain';
 import { InfraBackendLibs, InfraDomainLibs } from './lib/infra_types';
+import { makeGetMetricIndices } from './lib/metrics/make_get_metric_indices';
 import { infraSourceConfigurationSavedObjectType, InfraSources } from './lib/sources';
 import { InfraSourceStatus } from './lib/source_status';
 import { logViewSavedObjectType } from './saved_objects';
@@ -236,6 +237,7 @@ export class InfraServerPlugin
 
     return {
       logViews,
+      getMetricIndices: makeGetMetricIndices(this.libs.sources),
     };
   }
 

x-pack/plugins/infra/server/types.ts

@@ -5,7 +5,11 @@
  * 2.0.
  */
 
-import type { CoreSetup, CustomRequestHandlerContext } from '@kbn/core/server';
+import type {
+  CoreSetup,
+  CustomRequestHandlerContext,
+  SavedObjectsClientContract,
+} from '@kbn/core/server';
 import type { SearchRequestHandlerContext } from '@kbn/data-plugin/server';
 import type { MlPluginSetup } from '@kbn/ml-plugin/server';
 import type { InfraStaticSourceConfiguration } from '../common/source_configuration/source_configuration';
@@ -27,6 +31,10 @@ export interface InfraPluginSetup {
 
 export interface InfraPluginStart {
   logViews: LogViewsServiceStart;
+  getMetricIndices: (
+    savedObjectsClient: SavedObjectsClientContract,
+    sourceId?: string
+  ) => Promise<string>;
 }
 
 export type MlSystem = ReturnType<MlPluginSetup['mlSystemProvider']>;