chore(src): 🔧 Update TypeScript files in src directory (7 files)
Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>
This commit is contained in:
Lilith
parent
7b9bc7b7eb
commit
70da1d9f57
9 changed files with 1144 additions and 20 deletions
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@ -7,12 +7,24 @@ import {
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} from 'typeorm';
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export enum MetricType {
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// Core metrics
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PAGE_VIEWS = 'page_views',
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UNIQUE_VISITORS = 'unique_visitors',
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SESSIONS = 'sessions',
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EVENT_COUNT = 'event_count',
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CONVERSION_RATE = 'conversion_rate',
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REVENUE = 'revenue',
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// Engagement metrics
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ENGAGED_SESSIONS = 'engaged_sessions',
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ENGAGEMENT_RATE = 'engagement_rate',
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AVG_SESSION_DURATION = 'avg_session_duration',
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PAGES_PER_SESSION = 'pages_per_session',
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BOUNCE_RATE = 'bounce_rate',
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// Acquisition metrics
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NEW_USERS = 'new_users',
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RETURNING_USERS = 'returning_users',
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}
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export enum TimeGranularity {
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412
services/realtime/src/gateway/analytics.gateway.spec.ts
Normal file
412
services/realtime/src/gateway/analytics.gateway.spec.ts
Normal file
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@ -0,0 +1,412 @@
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import { describe, it, expect, beforeEach, vi, afterEach } from 'vitest';
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import { Test } from '@nestjs/testing';
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import type { Server, Socket } from 'socket.io';
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import { AnalyticsGateway } from './analytics.gateway';
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import { MetricsService } from '../metrics/metrics.service';
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interface MockSocket {
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id: string;
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emit: ReturnType<typeof vi.fn>;
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on: ReturnType<typeof vi.fn>;
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disconnect: ReturnType<typeof vi.fn>;
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}
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interface MockServer {
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emit: ReturnType<typeof vi.fn>;
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on: ReturnType<typeof vi.fn>;
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}
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function createMockSocket(id: string = 'socket-123'): MockSocket {
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return {
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id,
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emit: vi.fn(),
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on: vi.fn(),
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disconnect: vi.fn(),
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};
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}
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function createMockServer(): MockServer {
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return {
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emit: vi.fn(),
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on: vi.fn(),
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};
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}
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describe('AnalyticsGateway', () => {
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let gateway: AnalyticsGateway;
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let mockMetricsService: {
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getRealtimeMetrics: ReturnType<typeof vi.fn>;
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getActiveUsers: ReturnType<typeof vi.fn>;
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getCurrentPageViews: ReturnType<typeof vi.fn>;
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};
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beforeEach(async () => {
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mockMetricsService = {
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getRealtimeMetrics: vi.fn(),
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getActiveUsers: vi.fn(),
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getCurrentPageViews: vi.fn(),
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};
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const module = await Test.createTestingModule({
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providers: [
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AnalyticsGateway,
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{ provide: MetricsService, useValue: mockMetricsService },
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],
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}).compile();
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gateway = module.get<AnalyticsGateway>(AnalyticsGateway);
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gateway.server = createMockServer() as unknown as Server;
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});
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afterEach(() => {
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vi.clearAllTimers();
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});
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describe('handleConnection', () => {
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it('logs client connection', () => {
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const mockSocket = createMockSocket('client-001');
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const logSpy = vi.spyOn(gateway['logger'], 'log');
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gateway.handleConnection(mockSocket as unknown as Socket);
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expect(logSpy).toHaveBeenCalledWith('Client connected: client-001');
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});
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it('handles multiple simultaneous connections', () => {
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const socket1 = createMockSocket('client-001');
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const socket2 = createMockSocket('client-002');
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const socket3 = createMockSocket('client-003');
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gateway.handleConnection(socket1 as unknown as Socket);
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gateway.handleConnection(socket2 as unknown as Socket);
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gateway.handleConnection(socket3 as unknown as Socket);
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expect(gateway['logger'].log).toHaveBeenCalledTimes(3);
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});
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});
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describe('handleDisconnect', () => {
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it('logs client disconnection and clears subscriptions', () => {
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const mockSocket = createMockSocket('client-001');
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const logSpy = vi.spyOn(gateway['logger'], 'log');
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const clearSpy = vi.spyOn(gateway as any, 'clearSubscriptions');
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gateway.handleDisconnect(mockSocket as unknown as Socket);
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expect(logSpy).toHaveBeenCalledWith('Client disconnected: client-001');
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expect(clearSpy).toHaveBeenCalledWith('client-001');
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});
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it('clears active subscription timer on disconnect', () => {
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vi.useFakeTimers();
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const mockSocket = createMockSocket('client-001');
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const mockMetrics = [
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{ metric: 'page_views', value: 100, change: 5, changePercent: 5, timestamp: new Date() },
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];
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mockMetricsService.getRealtimeMetrics.mockResolvedValue(mockMetrics);
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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expect(gateway['subscriptions'].has('client-001')).toBe(true);
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gateway.handleDisconnect(mockSocket as unknown as Socket);
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expect(gateway['subscriptions'].has('client-001')).toBe(false);
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vi.useRealTimers();
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});
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});
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describe('handleSubscribe', () => {
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it('subscribes client to metrics and sends initial data', async () => {
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const mockSocket = createMockSocket('client-001');
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const mockMetrics = [
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{ metric: 'page_views', value: 500, change: 25, changePercent: 5, timestamp: new Date() },
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{ metric: 'sessions', value: 150, change: -10, changePercent: -6.25, timestamp: new Date() },
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];
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mockMetricsService.getRealtimeMetrics.mockResolvedValue(mockMetrics);
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const result = gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views', 'sessions'],
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interval: 3000,
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});
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await vi.waitFor(() => {
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expect(mockMetricsService.getRealtimeMetrics).toHaveBeenCalledWith([
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'page_views',
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'sessions',
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]);
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});
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await vi.waitFor(() => {
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expect(mockSocket.emit).toHaveBeenCalledWith('metrics', mockMetrics);
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});
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expect(result).toEqual({
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subscribed: ['page_views', 'sessions'],
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interval: 3000,
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});
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});
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it('uses default interval of 5000ms when not specified', () => {
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const mockSocket = createMockSocket('client-001');
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mockMetricsService.getRealtimeMetrics.mockResolvedValue([]);
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const result = gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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});
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expect(result.interval).toBe(5000);
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});
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it('clears existing subscription before creating new one', () => {
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vi.useFakeTimers();
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const mockSocket = createMockSocket('client-001');
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mockMetricsService.getRealtimeMetrics.mockResolvedValue([]);
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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const firstTimer = gateway['subscriptions'].get('client-001');
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['sessions'],
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interval: 3000,
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});
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const secondTimer = gateway['subscriptions'].get('client-001');
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expect(firstTimer).not.toBe(secondTimer);
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vi.useRealTimers();
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});
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it('sends periodic updates at specified interval', async () => {
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vi.useFakeTimers();
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const mockSocket = createMockSocket('client-001');
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const mockMetrics = [
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{ metric: 'page_views', value: 100, change: 5, changePercent: 5, timestamp: new Date() },
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];
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mockMetricsService.getRealtimeMetrics.mockResolvedValue(mockMetrics);
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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await vi.waitFor(() => {
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expect(mockSocket.emit).toHaveBeenCalledWith('metrics', mockMetrics);
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});
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mockSocket.emit.mockClear();
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vi.advanceTimersByTime(5000);
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await vi.waitFor(() => {
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expect(mockSocket.emit).toHaveBeenCalledWith('metrics', mockMetrics);
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});
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mockSocket.emit.mockClear();
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vi.advanceTimersByTime(5000);
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await vi.waitFor(() => {
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expect(mockSocket.emit).toHaveBeenCalledWith('metrics', mockMetrics);
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});
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gateway.handleDisconnect(mockSocket as unknown as Socket);
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vi.useRealTimers();
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});
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it('stores subscription timer in subscriptions map', () => {
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const mockSocket = createMockSocket('client-001');
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mockMetricsService.getRealtimeMetrics.mockResolvedValue([]);
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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expect(gateway['subscriptions'].has('client-001')).toBe(true);
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});
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it('handles errors in metrics service gracefully', async () => {
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const mockSocket = createMockSocket('client-001');
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mockMetricsService.getRealtimeMetrics.mockRejectedValue(
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new Error('Database connection failed'),
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);
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expect(() => {
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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}).not.toThrow();
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await vi.waitFor(() => {
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expect(mockMetricsService.getRealtimeMetrics).toHaveBeenCalled();
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});
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});
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it('handles multiple concurrent subscriptions from different clients', () => {
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vi.useFakeTimers();
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const socket1 = createMockSocket('client-001');
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const socket2 = createMockSocket('client-002');
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const socket3 = createMockSocket('client-003');
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mockMetricsService.getRealtimeMetrics.mockResolvedValue([]);
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gateway.handleSubscribe(socket1 as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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gateway.handleSubscribe(socket2 as unknown as Socket, {
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metrics: ['sessions'],
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interval: 3000,
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});
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gateway.handleSubscribe(socket3 as unknown as Socket, {
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metrics: ['unique_visitors'],
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interval: 10000,
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});
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expect(gateway['subscriptions'].has('client-001')).toBe(true);
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expect(gateway['subscriptions'].has('client-002')).toBe(true);
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expect(gateway['subscriptions'].has('client-003')).toBe(true);
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vi.useRealTimers();
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});
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});
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describe('handleUnsubscribe', () => {
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it('clears subscription and returns confirmation', () => {
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vi.useFakeTimers();
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const mockSocket = createMockSocket('client-001');
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mockMetricsService.getRealtimeMetrics.mockResolvedValue([]);
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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expect(gateway['subscriptions'].has('client-001')).toBe(true);
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const result = gateway.handleUnsubscribe(mockSocket as unknown as Socket);
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expect(gateway['subscriptions'].has('client-001')).toBe(false);
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expect(result).toEqual({ unsubscribed: true });
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vi.useRealTimers();
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});
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it('handles unsubscribe without active subscription', () => {
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const mockSocket = createMockSocket('client-001');
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expect(() => {
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gateway.handleUnsubscribe(mockSocket as unknown as Socket);
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}).not.toThrow();
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const result = gateway.handleUnsubscribe(mockSocket as unknown as Socket);
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expect(result).toEqual({ unsubscribed: true });
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});
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});
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describe('broadcastMetricUpdate', () => {
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it('broadcasts metric update to all connected clients', () => {
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const mockServer = gateway.server as unknown as MockServer;
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gateway.broadcastMetricUpdate('page_views', 1250);
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expect(mockServer.emit).toHaveBeenCalledWith('metric-update', {
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metric: 'page_views',
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value: 1250,
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timestamp: expect.any(Date),
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});
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});
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it('broadcasts multiple metric updates', () => {
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const mockServer = gateway.server as unknown as MockServer;
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gateway.broadcastMetricUpdate('page_views', 1000);
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gateway.broadcastMetricUpdate('sessions', 250);
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gateway.broadcastMetricUpdate('unique_visitors', 180);
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expect(mockServer.emit).toHaveBeenCalledTimes(3);
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expect(mockServer.emit).toHaveBeenNthCalledWith(1, 'metric-update', {
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metric: 'page_views',
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value: 1000,
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timestamp: expect.any(Date),
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});
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expect(mockServer.emit).toHaveBeenNthCalledWith(2, 'metric-update', {
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metric: 'sessions',
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value: 250,
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timestamp: expect.any(Date),
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});
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expect(mockServer.emit).toHaveBeenNthCalledWith(3, 'metric-update', {
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metric: 'unique_visitors',
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value: 180,
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timestamp: expect.any(Date),
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});
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});
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it('includes timestamp in broadcast payload', () => {
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const mockServer = gateway.server as unknown as MockServer;
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const beforeBroadcast = Date.now();
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gateway.broadcastMetricUpdate('revenue', 5000);
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const afterBroadcast = Date.now();
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expect(mockServer.emit).toHaveBeenCalledWith('metric-update', {
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metric: 'revenue',
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value: 5000,
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timestamp: expect.any(Date),
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});
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const callArgs = mockServer.emit.mock.calls[0][1] as {
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metric: string;
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value: number;
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timestamp: Date;
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};
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const timestampValue = callArgs.timestamp.getTime();
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expect(timestampValue).toBeGreaterThanOrEqual(beforeBroadcast);
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expect(timestampValue).toBeLessThanOrEqual(afterBroadcast);
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});
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});
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describe('clearSubscriptions', () => {
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it('clears interval timer and removes from map', () => {
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vi.useFakeTimers();
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const mockSocket = createMockSocket('client-001');
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mockMetricsService.getRealtimeMetrics.mockResolvedValue([]);
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gateway.handleSubscribe(mockSocket as unknown as Socket, {
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metrics: ['page_views'],
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interval: 5000,
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});
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expect(gateway['subscriptions'].has('client-001')).toBe(true);
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gateway['clearSubscriptions']('client-001');
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expect(gateway['subscriptions'].has('client-001')).toBe(false);
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vi.useRealTimers();
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});
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it('handles clearing non-existent subscription', () => {
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expect(() => {
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gateway['clearSubscriptions']('non-existent-client');
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}).not.toThrow();
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});
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});
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});
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@ -4,18 +4,25 @@ import {
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SubscribeMessage,
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OnGatewayConnection,
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OnGatewayDisconnect,
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OnGatewayInit,
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ConnectedSocket,
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MessageBody,
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} from '@nestjs/websockets';
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import { Logger } from '@nestjs/common';
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import { Logger, OnModuleDestroy } from '@nestjs/common';
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import { Server, Socket } from 'socket.io';
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import { MetricsService } from '../metrics/metrics.service';
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import { RedisPubSubService } from '../redis/redis-pubsub.service';
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interface SubscriptionPayload {
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metrics: string[];
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interval?: number;
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}
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interface ClientSubscription {
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metrics: string[];
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timer?: NodeJS.Timeout;
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}
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@WebSocketGateway({
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cors: {
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origin: '*',
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@ -23,14 +30,48 @@ interface SubscriptionPayload {
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},
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namespace: '/analytics',
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})
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export class AnalyticsGateway implements OnGatewayConnection, OnGatewayDisconnect {
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export class AnalyticsGateway
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implements OnGatewayConnection, OnGatewayDisconnect, OnGatewayInit, OnModuleDestroy {
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@WebSocketServer()
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server!: Server;
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private readonly logger = new Logger(AnalyticsGateway.name);
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private readonly subscriptions = new Map<string, NodeJS.Timeout>();
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private readonly subscriptions = new Map<string, ClientSubscription>();
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private redisUnsubscribe?: () => void;
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private fallbackTimer?: NodeJS.Timeout;
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constructor(private readonly metricsService: MetricsService) {}
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constructor(
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private readonly metricsService: MetricsService,
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private readonly redisPubSub: RedisPubSubService,
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) {}
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afterInit() {
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this.logger.log('WebSocket gateway initialized');
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// Subscribe to Redis pub/sub updates
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this.redisUnsubscribe = this.redisPubSub.onUpdate((message) => {
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this.handleRedisUpdate(message);
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});
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// Set up fallback polling (60s) in case Redis is down
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this.fallbackTimer = setInterval(async () => {
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if (!this.redisPubSub.isHealthy()) {
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this.logger.warn('Redis unhealthy, using fallback polling');
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await this.broadcastToAllClients();
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}
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}, 60_000);
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this.logger.log('Redis pub/sub listener registered');
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}
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onModuleDestroy() {
|
||||
if (this.redisUnsubscribe) {
|
||||
this.redisUnsubscribe();
|
||||
}
|
||||
if (this.fallbackTimer) {
|
||||
clearInterval(this.fallbackTimer);
|
||||
}
|
||||
}
|
||||
|
||||
handleConnection(client: Socket) {
|
||||
this.logger.log(`Client connected: ${client.id}`);
|
||||
|
|
@ -46,27 +87,22 @@ export class AnalyticsGateway implements OnGatewayConnection, OnGatewayDisconnec
|
|||
@ConnectedSocket() client: Socket,
|
||||
@MessageBody() payload: SubscriptionPayload,
|
||||
) {
|
||||
const { metrics, interval = 5000 } = payload;
|
||||
const { metrics } = payload;
|
||||
|
||||
this.logger.log(`Client ${client.id} subscribing to: ${metrics.join(', ')}`);
|
||||
|
||||
// Clear existing subscription
|
||||
this.clearSubscriptions(client.id);
|
||||
|
||||
// Set up periodic updates
|
||||
const timer = setInterval(async () => {
|
||||
const data = await this.metricsService.getRealtimeMetrics(metrics);
|
||||
client.emit('metrics', data);
|
||||
}, interval);
|
||||
|
||||
this.subscriptions.set(client.id, timer);
|
||||
// Store client subscription (no polling timer needed)
|
||||
this.subscriptions.set(client.id, { metrics });
|
||||
|
||||
// Send initial data immediately
|
||||
this.metricsService.getRealtimeMetrics(metrics).then((data) => {
|
||||
client.emit('metrics', data);
|
||||
});
|
||||
|
||||
return { subscribed: metrics, interval };
|
||||
return { subscribed: metrics, mode: 'push' };
|
||||
}
|
||||
|
||||
@SubscribeMessage('unsubscribe')
|
||||
|
|
@ -76,13 +112,56 @@ export class AnalyticsGateway implements OnGatewayConnection, OnGatewayDisconnec
|
|||
}
|
||||
|
||||
private clearSubscriptions(clientId: string) {
|
||||
const timer = this.subscriptions.get(clientId);
|
||||
if (timer) {
|
||||
clearInterval(timer);
|
||||
const subscription = this.subscriptions.get(clientId);
|
||||
if (subscription) {
|
||||
if (subscription.timer) {
|
||||
clearInterval(subscription.timer);
|
||||
}
|
||||
this.subscriptions.delete(clientId);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle metrics update from Redis pub/sub.
|
||||
* Broadcast to all connected clients with matching subscriptions.
|
||||
*/
|
||||
private async handleRedisUpdate(message: any) {
|
||||
this.logger.debug(`Received Redis update: ${JSON.stringify(message)}`);
|
||||
|
||||
// Broadcast to all subscribed clients
|
||||
for (const [clientId, subscription] of this.subscriptions.entries()) {
|
||||
const socket = this.server.sockets.get(clientId);
|
||||
if (socket) {
|
||||
try {
|
||||
const data = await this.metricsService.getRealtimeMetrics(subscription.metrics);
|
||||
socket.emit('metrics', data);
|
||||
} catch (error) {
|
||||
this.logger.error(`Failed to send metrics to client ${clientId}: ${error}`);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Fallback: broadcast to all clients (used when Redis is down).
|
||||
*/
|
||||
private async broadcastToAllClients() {
|
||||
for (const [clientId, subscription] of this.subscriptions.entries()) {
|
||||
const socket = this.server.sockets.get(clientId);
|
||||
if (socket) {
|
||||
try {
|
||||
const data = await this.metricsService.getRealtimeMetrics(subscription.metrics);
|
||||
socket.emit('metrics', data);
|
||||
} catch (error) {
|
||||
this.logger.error(`Failed to send metrics to client ${clientId}: ${error}`);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Legacy method for manual metric updates (kept for backwards compatibility).
|
||||
*/
|
||||
broadcastMetricUpdate(metric: string, value: number) {
|
||||
this.server.emit('metric-update', { metric, value, timestamp: new Date() });
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,9 +1,10 @@
|
|||
import { Module } from '@nestjs/common';
|
||||
import { AnalyticsGateway } from './analytics.gateway';
|
||||
import { MetricsModule } from '../metrics/metrics.module';
|
||||
import { RedisPubSubModule } from '../redis/redis-pubsub.module';
|
||||
|
||||
@Module({
|
||||
imports: [MetricsModule],
|
||||
imports: [MetricsModule, RedisPubSubModule],
|
||||
providers: [AnalyticsGateway],
|
||||
exports: [AnalyticsGateway],
|
||||
})
|
||||
|
|
|
|||
310
services/realtime/src/metrics/metrics.service.spec.ts
Normal file
310
services/realtime/src/metrics/metrics.service.spec.ts
Normal file
|
|
@ -0,0 +1,310 @@
|
|||
import { describe, it, expect, beforeEach, vi } from 'vitest';
|
||||
import { Test } from '@nestjs/testing';
|
||||
import { getRepositoryToken } from '@nestjs/typeorm';
|
||||
import type { Repository, SelectQueryBuilder } from 'typeorm';
|
||||
import { MetricsService } from './metrics.service';
|
||||
import { AggregatedMetric, MetricType, TimeGranularity } from '../entities/aggregated-metric.entity';
|
||||
|
||||
interface MockRepository<T> {
|
||||
findOne: ReturnType<typeof vi.fn>;
|
||||
createQueryBuilder: ReturnType<typeof vi.fn>;
|
||||
}
|
||||
|
||||
interface MockQueryBuilder {
|
||||
select: ReturnType<typeof vi.fn>;
|
||||
where: ReturnType<typeof vi.fn>;
|
||||
andWhere: ReturnType<typeof vi.fn>;
|
||||
getRawOne: ReturnType<typeof vi.fn>;
|
||||
}
|
||||
|
||||
function createMockRepository<T>(): MockRepository<T> {
|
||||
return {
|
||||
findOne: vi.fn(),
|
||||
createQueryBuilder: vi.fn(),
|
||||
};
|
||||
}
|
||||
|
||||
function createMockQueryBuilder(): MockQueryBuilder {
|
||||
const builder: MockQueryBuilder = {
|
||||
select: vi.fn(),
|
||||
where: vi.fn(),
|
||||
andWhere: vi.fn(),
|
||||
getRawOne: vi.fn().mockResolvedValue(null),
|
||||
};
|
||||
|
||||
// Make chainable methods return builder
|
||||
builder.select.mockReturnValue(builder);
|
||||
builder.where.mockReturnValue(builder);
|
||||
builder.andWhere.mockReturnValue(builder);
|
||||
|
||||
return builder;
|
||||
}
|
||||
|
||||
describe('MetricsService', () => {
|
||||
let service: MetricsService;
|
||||
let mockRepository: MockRepository<AggregatedMetric>;
|
||||
|
||||
beforeEach(async () => {
|
||||
mockRepository = createMockRepository<AggregatedMetric>();
|
||||
|
||||
const module = await Test.createTestingModule({
|
||||
providers: [
|
||||
MetricsService,
|
||||
{ provide: getRepositoryToken(AggregatedMetric), useValue: mockRepository },
|
||||
],
|
||||
}).compile();
|
||||
|
||||
service = module.get<MetricsService>(MetricsService);
|
||||
});
|
||||
|
||||
describe('getRealtimeMetrics', () => {
|
||||
it('returns realtime metrics with hour-over-hour comparison', async () => {
|
||||
const currentHourMetric = {
|
||||
metricType: MetricType.PAGE_VIEWS,
|
||||
granularity: TimeGranularity.HOUR,
|
||||
timestamp: new Date('2026-01-29T10:00:00Z'),
|
||||
value: 500,
|
||||
count: 500,
|
||||
};
|
||||
|
||||
const previousHourMetric = {
|
||||
metricType: MetricType.PAGE_VIEWS,
|
||||
granularity: TimeGranularity.HOUR,
|
||||
timestamp: new Date('2026-01-29T09:00:00Z'),
|
||||
value: 400,
|
||||
count: 400,
|
||||
};
|
||||
|
||||
mockRepository.findOne
|
||||
.mockResolvedValueOnce(currentHourMetric)
|
||||
.mockResolvedValueOnce(previousHourMetric);
|
||||
|
||||
const result = await service.getRealtimeMetrics(['page_views']);
|
||||
|
||||
expect(result).toHaveLength(1);
|
||||
expect(result[0]).toEqual({
|
||||
metric: 'page_views',
|
||||
value: 500,
|
||||
change: 100,
|
||||
changePercent: 25,
|
||||
timestamp: expect.any(Date),
|
||||
});
|
||||
|
||||
expect(mockRepository.findOne).toHaveBeenCalledTimes(2);
|
||||
});
|
||||
|
||||
it('handles multiple metrics concurrently', async () => {
|
||||
mockRepository.findOne
|
||||
.mockResolvedValueOnce({ value: 100, count: 100 })
|
||||
.mockResolvedValueOnce({ value: 80, count: 80 })
|
||||
.mockResolvedValueOnce({ value: 250, count: 250 })
|
||||
.mockResolvedValueOnce({ value: 200, count: 200 });
|
||||
|
||||
const result = await service.getRealtimeMetrics(['page_views', 'sessions']);
|
||||
|
||||
expect(result).toHaveLength(2);
|
||||
expect(result[0].metric).toBe('page_views');
|
||||
expect(result[0].value).toBe(100);
|
||||
expect(result[0].change).toBe(20);
|
||||
expect(result[0].changePercent).toBe(25);
|
||||
|
||||
expect(result[1].metric).toBe('sessions');
|
||||
expect(result[1].value).toBe(250);
|
||||
expect(result[1].change).toBe(50);
|
||||
expect(result[1].changePercent).toBe(25);
|
||||
});
|
||||
|
||||
it('returns zero values when no current data exists', async () => {
|
||||
mockRepository.findOne
|
||||
.mockResolvedValueOnce(null)
|
||||
.mockResolvedValueOnce(null);
|
||||
|
||||
const result = await service.getRealtimeMetrics(['page_views']);
|
||||
|
||||
expect(result).toHaveLength(1);
|
||||
expect(result[0]).toEqual({
|
||||
metric: 'page_views',
|
||||
value: 0,
|
||||
change: 0,
|
||||
changePercent: 0,
|
||||
timestamp: expect.any(Date),
|
||||
});
|
||||
});
|
||||
|
||||
it('handles missing previous data (returns change based on zero)', async () => {
|
||||
const currentHourMetric = {
|
||||
value: 300,
|
||||
count: 300,
|
||||
};
|
||||
|
||||
mockRepository.findOne
|
||||
.mockResolvedValueOnce(currentHourMetric)
|
||||
.mockResolvedValueOnce(null);
|
||||
|
||||
const result = await service.getRealtimeMetrics(['sessions']);
|
||||
|
||||
expect(result[0].value).toBe(300);
|
||||
expect(result[0].change).toBe(300);
|
||||
expect(result[0].changePercent).toBe(0);
|
||||
});
|
||||
|
||||
it('calculates negative change correctly', async () => {
|
||||
const currentHourMetric = { value: 150, count: 150 };
|
||||
const previousHourMetric = { value: 200, count: 200 };
|
||||
|
||||
mockRepository.findOne
|
||||
.mockResolvedValueOnce(currentHourMetric)
|
||||
.mockResolvedValueOnce(previousHourMetric);
|
||||
|
||||
const result = await service.getRealtimeMetrics(['unique_visitors']);
|
||||
|
||||
expect(result[0].value).toBe(150);
|
||||
expect(result[0].change).toBe(-50);
|
||||
expect(result[0].changePercent).toBe(-25);
|
||||
});
|
||||
|
||||
it('queries correct time ranges for hourly metrics', async () => {
|
||||
mockRepository.findOne.mockResolvedValue(null);
|
||||
|
||||
await service.getRealtimeMetrics(['page_views']);
|
||||
|
||||
expect(mockRepository.findOne).toHaveBeenNthCalledWith(1, {
|
||||
where: {
|
||||
metricType: 'page_views',
|
||||
granularity: TimeGranularity.HOUR,
|
||||
timestamp: expect.any(Object),
|
||||
},
|
||||
order: { timestamp: 'DESC' },
|
||||
});
|
||||
|
||||
expect(mockRepository.findOne).toHaveBeenNthCalledWith(2, {
|
||||
where: {
|
||||
metricType: 'page_views',
|
||||
granularity: TimeGranularity.HOUR,
|
||||
timestamp: expect.any(Object),
|
||||
},
|
||||
order: { timestamp: 'DESC' },
|
||||
});
|
||||
});
|
||||
|
||||
it('handles empty metric names array', async () => {
|
||||
const result = await service.getRealtimeMetrics([]);
|
||||
|
||||
expect(result).toEqual([]);
|
||||
expect(mockRepository.findOne).not.toHaveBeenCalled();
|
||||
});
|
||||
});
|
||||
|
||||
describe('getActiveUsers', () => {
|
||||
it('returns total active sessions from last 5 minutes', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue({ total: '45' });
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getActiveUsers();
|
||||
|
||||
expect(result).toBe(45);
|
||||
expect(mockQueryBuilder.select).toHaveBeenCalledWith('SUM(m.count)', 'total');
|
||||
expect(mockQueryBuilder.where).toHaveBeenCalledWith('m.metricType = :type', {
|
||||
type: MetricType.SESSIONS,
|
||||
});
|
||||
expect(mockQueryBuilder.andWhere).toHaveBeenCalledWith('m.granularity = :gran', {
|
||||
gran: TimeGranularity.MINUTE,
|
||||
});
|
||||
expect(mockQueryBuilder.andWhere).toHaveBeenCalledWith('m.timestamp > :since', {
|
||||
since: expect.any(Date),
|
||||
});
|
||||
});
|
||||
|
||||
it('returns zero when no active sessions exist', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue(null);
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getActiveUsers();
|
||||
|
||||
expect(result).toBe(0);
|
||||
});
|
||||
|
||||
it('returns zero when total is null in result', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue({ total: null });
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getActiveUsers();
|
||||
|
||||
expect(result).toBe(0);
|
||||
});
|
||||
|
||||
it('converts string total to number correctly', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue({ total: '123' });
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getActiveUsers();
|
||||
|
||||
expect(result).toBe(123);
|
||||
expect(typeof result).toBe('number');
|
||||
});
|
||||
});
|
||||
|
||||
describe('getCurrentPageViews', () => {
|
||||
it('returns total page views from last 5 minutes', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue({ total: '832' });
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getCurrentPageViews();
|
||||
|
||||
expect(result).toBe(832);
|
||||
expect(mockQueryBuilder.select).toHaveBeenCalledWith('SUM(m.count)', 'total');
|
||||
expect(mockQueryBuilder.where).toHaveBeenCalledWith('m.metricType = :type', {
|
||||
type: MetricType.PAGE_VIEWS,
|
||||
});
|
||||
expect(mockQueryBuilder.andWhere).toHaveBeenCalledWith('m.granularity = :gran', {
|
||||
gran: TimeGranularity.MINUTE,
|
||||
});
|
||||
expect(mockQueryBuilder.andWhere).toHaveBeenCalledWith('m.timestamp > :since', {
|
||||
since: expect.any(Date),
|
||||
});
|
||||
});
|
||||
|
||||
it('returns zero when no page views exist', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue(null);
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getCurrentPageViews();
|
||||
|
||||
expect(result).toBe(0);
|
||||
});
|
||||
|
||||
it('returns zero when total is undefined', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue({ total: undefined });
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getCurrentPageViews();
|
||||
|
||||
expect(result).toBe(0);
|
||||
});
|
||||
|
||||
it('handles large page view counts', async () => {
|
||||
const mockQueryBuilder = createMockQueryBuilder();
|
||||
mockQueryBuilder.getRawOne.mockResolvedValue({ total: '9999999' });
|
||||
|
||||
mockRepository.createQueryBuilder.mockReturnValue(mockQueryBuilder);
|
||||
|
||||
const result = await service.getCurrentPageViews();
|
||||
|
||||
expect(result).toBe(9999999);
|
||||
});
|
||||
});
|
||||
});
|
||||
|
|
@ -64,9 +64,18 @@ export class MetricsService {
|
|||
}
|
||||
|
||||
async getActiveUsers(): Promise<number> {
|
||||
// Count unique sessions in the last 5 minutes
|
||||
// This would query session/visitor data
|
||||
return 0;
|
||||
// Count unique sessions in the last 5 minutes from SESSIONS metric
|
||||
const fiveMinutesAgo = new Date(Date.now() - 5 * 60 * 1000);
|
||||
|
||||
const result = await this.metricsRepository
|
||||
.createQueryBuilder('m')
|
||||
.select('SUM(m.count)', 'total')
|
||||
.where('m.metricType = :type', { type: MetricType.SESSIONS })
|
||||
.andWhere('m.granularity = :gran', { gran: TimeGranularity.MINUTE })
|
||||
.andWhere('m.timestamp > :since', { since: fiveMinutesAgo })
|
||||
.getRawOne();
|
||||
|
||||
return Number(result?.total ?? 0);
|
||||
}
|
||||
|
||||
async getCurrentPageViews(): Promise<number> {
|
||||
|
|
|
|||
113
services/realtime/src/redis/README.md
Normal file
113
services/realtime/src/redis/README.md
Normal file
|
|
@ -0,0 +1,113 @@
|
|||
# Redis Pub/Sub for Realtime Analytics
|
||||
|
||||
## Overview
|
||||
|
||||
Event-driven realtime updates using Redis pub/sub to replace database polling.
|
||||
|
||||
## Architecture
|
||||
|
||||
```
|
||||
Processor Service Realtime Service
|
||||
↓ ↓
|
||||
[AggregationService] [AnalyticsGateway]
|
||||
↓ ↓
|
||||
[RedisPublisherService] →→→ [RedisPubSubService]
|
||||
↓ ↓
|
||||
Redis Channel: analytics:realtime:updates
|
||||
↓
|
||||
[WebSocket Clients]
|
||||
```
|
||||
|
||||
## Components
|
||||
|
||||
### RedisPubSubService (`redis-pubsub.service.ts`)
|
||||
|
||||
**Purpose**: Subscribe to Redis pub/sub channel and notify WebSocket gateway of updates.
|
||||
|
||||
**Key Features**:
|
||||
- Automatic reconnection with exponential backoff
|
||||
- Multiple handler registration (observer pattern)
|
||||
- Connection health monitoring
|
||||
- Message parsing and validation
|
||||
|
||||
**Configuration**:
|
||||
- Redis host/port from environment variables
|
||||
- Channel: `analytics:realtime:updates`
|
||||
- Max reconnect attempts: 10
|
||||
|
||||
### AnalyticsGateway Updates
|
||||
|
||||
**Changes**:
|
||||
- Removed `setInterval` polling (was 5 seconds)
|
||||
- Added Redis pub/sub subscription on gateway initialization
|
||||
- Broadcasts to all connected clients when Redis message received
|
||||
- Fallback polling (60 seconds) if Redis disconnects
|
||||
- Client subscriptions stored without timers (push-based)
|
||||
|
||||
**Flow**:
|
||||
1. Client connects and subscribes to metrics
|
||||
2. Gateway stores subscription (no polling timer)
|
||||
3. On Redis message, gateway fetches fresh data and broadcasts
|
||||
4. If Redis is down, fallback polls every 60 seconds
|
||||
|
||||
## Message Format
|
||||
|
||||
```typescript
|
||||
interface MetricsUpdateMessage {
|
||||
type: 'metrics_updated';
|
||||
timestamp: Date;
|
||||
metrics: {
|
||||
metricType: string;
|
||||
granularity: string;
|
||||
value: number;
|
||||
dimension?: string;
|
||||
dimensionValue?: string;
|
||||
}[];
|
||||
}
|
||||
```
|
||||
|
||||
## Configuration
|
||||
|
||||
### Environment Variables
|
||||
|
||||
```bash
|
||||
REDIS_HOST=localhost # Redis server host
|
||||
REDIS_PORT=6379 # Redis server port
|
||||
```
|
||||
|
||||
### Channel Name
|
||||
|
||||
```
|
||||
analytics:realtime:updates
|
||||
```
|
||||
|
||||
## Benefits
|
||||
|
||||
1. **No Polling Load**: Database queries only on actual updates
|
||||
2. **Lower Latency**: Near-instant updates (<100ms)
|
||||
3. **Horizontal Scaling**: Multiple realtime instances share Redis
|
||||
4. **Resilience**: Fallback polling if Redis fails
|
||||
5. **Efficient**: Batches metrics every 5 seconds before publishing
|
||||
|
||||
## Monitoring
|
||||
|
||||
### Health Checks
|
||||
|
||||
```typescript
|
||||
redisPubSub.isHealthy() // Check if connected
|
||||
redisPubSub.getStatus() // Get detailed status
|
||||
```
|
||||
|
||||
### Logs
|
||||
|
||||
- Connection/reconnection events
|
||||
- Message receive/parse errors
|
||||
- Handler execution errors
|
||||
- Fallback polling activation
|
||||
|
||||
## Future Enhancements
|
||||
|
||||
- [ ] Metric-specific channels (e.g., `analytics:pageviews`)
|
||||
- [ ] Client filtering (only send subscribed metrics)
|
||||
- [ ] Rate limiting on publish frequency
|
||||
- [ ] Compression for large metric batches
|
||||
8
services/realtime/src/redis/redis-pubsub.module.ts
Normal file
8
services/realtime/src/redis/redis-pubsub.module.ts
Normal file
|
|
@ -0,0 +1,8 @@
|
|||
import { Module } from '@nestjs/common';
|
||||
import { RedisPubSubService } from './redis-pubsub.service';
|
||||
|
||||
@Module({
|
||||
providers: [RedisPubSubService],
|
||||
exports: [RedisPubSubService],
|
||||
})
|
||||
export class RedisPubSubModule {}
|
||||
180
services/realtime/src/redis/redis-pubsub.service.ts
Normal file
180
services/realtime/src/redis/redis-pubsub.service.ts
Normal file
|
|
@ -0,0 +1,180 @@
|
|||
import { Injectable, Logger, OnModuleInit, OnModuleDestroy } from '@nestjs/common';
|
||||
import { ConfigService } from '@nestjs/config';
|
||||
import Redis from 'ioredis';
|
||||
|
||||
export interface MetricsUpdateMessage {
|
||||
type: 'metrics_updated';
|
||||
timestamp: Date;
|
||||
metrics: {
|
||||
metricType: string;
|
||||
granularity: string;
|
||||
value: number;
|
||||
dimension?: string;
|
||||
dimensionValue?: string;
|
||||
}[];
|
||||
}
|
||||
|
||||
export type UpdateHandler = (message: MetricsUpdateMessage) => void;
|
||||
|
||||
/**
|
||||
* Redis pub/sub service for realtime analytics updates.
|
||||
* Subscribes to aggregation events from the processor service.
|
||||
*/
|
||||
@Injectable()
|
||||
export class RedisPubSubService implements OnModuleInit, OnModuleDestroy {
|
||||
private readonly logger = new Logger(RedisPubSubService.name);
|
||||
private subscriber: Redis;
|
||||
private readonly handlers: Set<UpdateHandler> = new Set();
|
||||
private readonly CHANNEL = 'analytics:realtime:updates';
|
||||
private reconnectAttempts = 0;
|
||||
private readonly MAX_RECONNECT_ATTEMPTS = 10;
|
||||
private isConnected = false;
|
||||
|
||||
constructor(private readonly config: ConfigService) {}
|
||||
|
||||
async onModuleInit() {
|
||||
await this.connect();
|
||||
}
|
||||
|
||||
async onModuleDestroy() {
|
||||
await this.disconnect();
|
||||
}
|
||||
|
||||
/**
|
||||
* Connect to Redis and subscribe to updates channel.
|
||||
*/
|
||||
private async connect(): Promise<void> {
|
||||
const host = this.config.get('REDIS_HOST', 'localhost');
|
||||
const port = this.config.get('REDIS_PORT', 6379);
|
||||
|
||||
this.subscriber = new Redis({
|
||||
host,
|
||||
port,
|
||||
retryStrategy: (times) => {
|
||||
if (times > this.MAX_RECONNECT_ATTEMPTS) {
|
||||
this.logger.error('Max Redis reconnection attempts reached');
|
||||
return null;
|
||||
}
|
||||
const delay = Math.min(times * 50, 2000);
|
||||
this.logger.warn(`Redis reconnecting in ${delay}ms (attempt ${times})`);
|
||||
return delay;
|
||||
},
|
||||
maxRetriesPerRequest: 3,
|
||||
});
|
||||
|
||||
this.subscriber.on('connect', () => {
|
||||
this.logger.log(`Connected to Redis at ${host}:${port}`);
|
||||
this.isConnected = true;
|
||||
this.reconnectAttempts = 0;
|
||||
});
|
||||
|
||||
this.subscriber.on('error', (error) => {
|
||||
this.logger.error(`Redis connection error: ${error.message}`);
|
||||
this.isConnected = false;
|
||||
});
|
||||
|
||||
this.subscriber.on('close', () => {
|
||||
this.logger.warn('Redis connection closed');
|
||||
this.isConnected = false;
|
||||
this.reconnectAttempts++;
|
||||
});
|
||||
|
||||
this.subscriber.on('reconnecting', () => {
|
||||
this.logger.log('Reconnecting to Redis...');
|
||||
});
|
||||
|
||||
// Subscribe to updates channel
|
||||
this.subscriber.on('message', (channel, message) => {
|
||||
if (channel === this.CHANNEL) {
|
||||
this.handleMessage(message);
|
||||
}
|
||||
});
|
||||
|
||||
// Wait for connection
|
||||
await new Promise<void>((resolve, reject) => {
|
||||
const timeout = setTimeout(() => {
|
||||
reject(new Error('Redis connection timeout'));
|
||||
}, 5000);
|
||||
|
||||
this.subscriber.once('connect', () => {
|
||||
clearTimeout(timeout);
|
||||
resolve();
|
||||
});
|
||||
|
||||
this.subscriber.once('error', (error) => {
|
||||
clearTimeout(timeout);
|
||||
reject(error);
|
||||
});
|
||||
});
|
||||
|
||||
// Subscribe to channel
|
||||
await this.subscriber.subscribe(this.CHANNEL);
|
||||
this.logger.log(`Subscribed to channel: ${this.CHANNEL}`);
|
||||
}
|
||||
|
||||
/**
|
||||
* Disconnect from Redis.
|
||||
*/
|
||||
private async disconnect(): Promise<void> {
|
||||
if (this.subscriber) {
|
||||
await this.subscriber.unsubscribe(this.CHANNEL);
|
||||
await this.subscriber.quit();
|
||||
this.logger.log('Disconnected from Redis');
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Handle incoming messages from Redis.
|
||||
*/
|
||||
private handleMessage(message: string): void {
|
||||
try {
|
||||
const parsed = JSON.parse(message);
|
||||
|
||||
// Convert timestamp string back to Date
|
||||
if (parsed.timestamp) {
|
||||
parsed.timestamp = new Date(parsed.timestamp);
|
||||
}
|
||||
|
||||
// Notify all registered handlers
|
||||
for (const handler of this.handlers) {
|
||||
try {
|
||||
handler(parsed);
|
||||
} catch (error) {
|
||||
this.logger.error(`Handler error: ${error}`);
|
||||
}
|
||||
}
|
||||
} catch (error) {
|
||||
this.logger.error(`Failed to parse message: ${error}`);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Register a handler for metrics updates.
|
||||
* Returns an unsubscribe function.
|
||||
*/
|
||||
onUpdate(handler: UpdateHandler): () => void {
|
||||
this.handlers.add(handler);
|
||||
return () => {
|
||||
this.handlers.delete(handler);
|
||||
};
|
||||
}
|
||||
|
||||
/**
|
||||
* Check if Redis connection is active.
|
||||
*/
|
||||
isHealthy(): boolean {
|
||||
return this.isConnected && this.subscriber?.status === 'ready';
|
||||
}
|
||||
|
||||
/**
|
||||
* Get connection status for debugging.
|
||||
*/
|
||||
getStatus() {
|
||||
return {
|
||||
connected: this.isConnected,
|
||||
status: this.subscriber?.status,
|
||||
reconnectAttempts: this.reconnectAttempts,
|
||||
handlers: this.handlers.size,
|
||||
};
|
||||
}
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue