Makes usage collection methods available on start

src/plugins/usage_collection/public/plugin.ts

@@ -52,12 +52,17 @@ export interface UsageCollectionSetup {
  };
 }
 
+export interface UsageCollectionStart {
+ reportUiStats: Reporter['reportUiStats'];
+ METRIC_TYPE: typeof METRIC_TYPE;
+}
+
 export function isUnauthenticated(http: HttpSetup) {
  const { anonymousPaths } = http;
  return anonymousPaths.isAnonymous(window.location.pathname);
 }
 
-export class UsageCollectionPlugin implements Plugin<UsageCollectionSetup> {
+export class UsageCollectionPlugin implements Plugin<UsageCollectionSetup, UsageCollectionStart> {
  private readonly legacyAppId$ = new Subject<string>();
  private trackUserAgent: boolean = true;
  private reporter?: Reporter;
@@ -90,7 +95,7 @@ export class UsageCollectionPlugin implements Plugin<UsageCollectionSetup> {
 
  public start({ http, application }: CoreStart) {
  if (!this.reporter) {
- return;
+ throw new Error('Usage collection reporter not set up correctly');
  }
 
  if (this.config.uiMetric.enabled && !isUnauthenticated(http)) {
@@ -100,7 +105,13 @@ export class UsageCollectionPlugin implements Plugin<UsageCollectionSetup> {
  if (this.trackUserAgent) {
  this.reporter.reportUserAgent('kibana');
  }
+
  reportApplicationUsage(merge(application.currentAppId$, this.legacyAppId$), this.reporter);
+
+ return {
+ reportUiStats: this.reporter.reportUiStats,
+ METRIC_TYPE,
+ };
  }
 
  public stop() {}