ARC-1705 Emit SLO for branch creation and failure (#1647)

Initial checkin

Co-authored-by: Harminder <hsingh5@atlassian.com>
Co-authored-by: joshkay10 <josh.kay@outlook.com>

src/config/metric-names.ts

@@ -51,3 +51,8 @@ export const metricWebhooks = {
 	webhookLatency: `${server}.webhooks.processing-time.latency`
 };
 
+export const metricCreateBranch = {
+	created: `${server}.create-branch.created`,
+	failed: `${server}.create-branch.failed`
+};
+

src/routes/github/create-branch/github-create-branch-post.ts

@@ -2,6 +2,9 @@ import { Request, Response } from "express";
 import { createUserClient } from "~/src/util/get-github-client-config";
 import { sendAnalytics } from "utils/analytics-client";
 import { AnalyticsEventTypes, AnalyticsTrackEventsEnum } from "interfaces/common";
+import { statsd } from "~/src/config/statsd";
+import { metricCreateBranch } from "~/src/config/metric-names";
+import { getCloudOrServerFromGitHubAppId } from "~/src/util/get-cloud-or-server";
 
 const errorMessages = {
 	// TODO: Fix the url later, once you figure out how to get the `installationId`
@@ -42,10 +45,19 @@ export const GithubCreateBranchPost = async (req: Request, res: Response): Promi
 		});
 		res.sendStatus(200);
 		sendTrackEventAnalytics(AnalyticsTrackEventsEnum.CreateBranchSuccessTrackEventName, jiraHost);
+		const tags = {
+			name: newBranchName,
+			gitHubProduct: getCloudOrServerFromGitHubAppId(gitHubAppConfig.githubAppId)
+		};
+		statsd.increment(metricCreateBranch.created, tags);
 	} catch (err) {
 		req.log.error({ err }, "Error creating branch");
 		res.status(err.status).json(errorMessages[err?.status || 500]);
 		sendTrackEventAnalytics(AnalyticsTrackEventsEnum.CreateBranchErrorTrackEventName, jiraHost);
+		statsd.increment(metricCreateBranch.failed, {
+			name: newBranchName
+		});
+
 	}
 };