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client-metrics-store-v2.ts
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client-metrics-store-v2.ts
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import { Logger, LogProvider } from '../logger';
import {
IClientMetricsEnv,
IClientMetricsEnvKey,
IClientMetricsStoreV2,
} from '../types/stores/client-metrics-store-v2';
import NotFoundError from '../error/notfound-error';
import { startOfHour } from 'date-fns';
import { collapseHourlyMetrics } from '../util/collapseHourlyMetrics';
import { Db } from './db';
interface ClientMetricsEnvTable {
feature_name: string;
app_name: string;
environment: string;
timestamp: Date;
yes: number;
no: number;
}
const TABLE = 'client_metrics_env';
const fromRow = (row: ClientMetricsEnvTable) => ({
featureName: row.feature_name,
appName: row.app_name,
environment: row.environment,
timestamp: row.timestamp,
yes: Number(row.yes),
no: Number(row.no),
});
const toRow = (metric: IClientMetricsEnv): ClientMetricsEnvTable => ({
feature_name: metric.featureName,
app_name: metric.appName,
environment: metric.environment,
timestamp: startOfHour(metric.timestamp),
yes: metric.yes,
no: metric.no,
});
export class ClientMetricsStoreV2 implements IClientMetricsStoreV2 {
private db: Db;
private logger: Logger;
constructor(db: Db, getLogger: LogProvider) {
this.db = db;
this.logger = getLogger('client-metrics-store-v2.js');
}
async get(key: IClientMetricsEnvKey): Promise<IClientMetricsEnv> {
const row = await this.db<ClientMetricsEnvTable>(TABLE)
.where({
feature_name: key.featureName,
app_name: key.appName,
environment: key.environment,
timestamp: startOfHour(key.timestamp),
})
.first();
if (row) {
return fromRow(row);
}
throw new NotFoundError(`Could not find metric`);
}
async getAll(query: Object = {}): Promise<IClientMetricsEnv[]> {
const rows = await this.db<ClientMetricsEnvTable>(TABLE)
.select('*')
.where(query);
return rows.map(fromRow);
}
async exists(key: IClientMetricsEnvKey): Promise<boolean> {
try {
await this.get(key);
return true;
} catch (e) {
return false;
}
}
async delete(key: IClientMetricsEnvKey): Promise<void> {
return this.db<ClientMetricsEnvTable>(TABLE)
.where({
feature_name: key.featureName,
app_name: key.appName,
environment: key.environment,
timestamp: startOfHour(key.timestamp),
})
.del();
}
deleteAll(): Promise<void> {
return this.db(TABLE).del();
}
destroy(): void {
// Nothing to do!
}
// this function will collapse metrics before sending it to the database.
async batchInsertMetrics(metrics: IClientMetricsEnv[]): Promise<void> {
if (!metrics || metrics.length == 0) {
return;
}
const rows = collapseHourlyMetrics(metrics).map(toRow);
// Sort the rows to avoid deadlocks
const sortedRows = rows.sort(
(a, b) =>
a.feature_name.localeCompare(b.feature_name) ||
a.app_name.localeCompare(b.app_name) ||
a.environment.localeCompare(b.environment),
);
// Consider rewriting to SQL batch!
const insert = this.db<ClientMetricsEnvTable>(TABLE)
.insert(sortedRows)
.toQuery();
const query = `${insert.toString()} ON CONFLICT (feature_name, app_name, environment, timestamp) DO UPDATE SET "yes" = "client_metrics_env"."yes" + EXCLUDED.yes, "no" = "client_metrics_env"."no" + EXCLUDED.no`;
await this.db.raw(query);
}
async getMetricsForFeatureToggle(
featureName: string,
hoursBack: number = 24,
): Promise<IClientMetricsEnv[]> {
const rows = await this.db<ClientMetricsEnvTable>(TABLE)
.select('*')
.where({ feature_name: featureName })
.andWhereRaw(`timestamp >= NOW() - INTERVAL '${hoursBack} hours'`);
return rows.map(fromRow);
}
async getSeenAppsForFeatureToggle(
featureName: string,
hoursBack: number = 24,
): Promise<string[]> {
return this.db<ClientMetricsEnvTable>(TABLE)
.distinct()
.where({ feature_name: featureName })
.andWhereRaw(`timestamp >= NOW() - INTERVAL '${hoursBack} hours'`)
.pluck('app_name')
.orderBy('app_name');
}
async getSeenTogglesForApp(
appName: string,
hoursBack: number = 24,
): Promise<string[]> {
return this.db<ClientMetricsEnvTable>(TABLE)
.distinct()
.where({ app_name: appName })
.andWhereRaw(`timestamp >= NOW() - INTERVAL '${hoursBack} hours'`)
.pluck('feature_name')
.orderBy('feature_name');
}
async clearMetrics(hoursAgo: number): Promise<void> {
return this.db<ClientMetricsEnvTable>(TABLE)
.whereRaw(`timestamp <= NOW() - INTERVAL '${hoursAgo} hours'`)
.del();
}
}