Initial proxy manager refactor

apps/data-service/src/index.ts

@@ -11,6 +11,7 @@ import { getLogger, setLoggerConfig, shutdownLoggers } from '@stock-bot/logger';
 import { connectMongoDB } from '@stock-bot/mongodb-client';
 import { connectPostgreSQL } from '@stock-bot/postgres-client';
 import { QueueManager, type QueueManagerConfig } from '@stock-bot/queue';
+import { ProxyManager } from '@stock-bot/utils';
 import { Shutdown } from '@stock-bot/shutdown';
 // Local imports
 import { exchangeRoutes, healthRoutes, queueRoutes } from './routes';
@@ -116,8 +117,7 @@ async function initializeServices() {
 
     // Initialize proxy manager
     logger.debug('Initializing proxy manager...');
-    const { proxyManager } = await import('@stock-bot/utils');
-    await proxyManager.initialize();
+    await ProxyManager.initialize();
     logger.info('Proxy manager initialized');
 
     // Initialize providers (register handlers and scheduled jobs)
@@ -257,4 +257,4 @@ startServer().catch(error => {
 
 logger.info('Data service startup initiated');
 
-// Queue manager is available via QueueManager.getInstance() singleton pattern
+// ProxyManager class and singleton instance are available via @stock-bot/utils

apps/data-service/src/providers/qm.tasks.ts

@@ -2,7 +2,7 @@ import { getRandomUserAgent } from '@stock-bot/http';
 import { getLogger } from '@stock-bot/logger';
 import { getMongoDBClient } from '@stock-bot/mongodb-client';
 import { QueueManager } from '@stock-bot/queue';
-import { proxyManager } from '@stock-bot/utils';
+import { ProxyManager } from '@stock-bot/utils';
 
 // Shared instances (module-scoped, not global)
 let isInitialized = false; // Track if resources are initialized
@@ -90,7 +90,7 @@ export async function createSessions(): Promise<void> {
 
       while (sessionCache[sessionId].length < 50) {
         logger.info(`Creating new session for ${sessionId}`);
-        const proxyInfo = await proxyManager.getRandomProxy();
+        const proxyInfo = await ProxyManager.getInstance().getRandomProxy();
         if (!proxyInfo) {
           logger.error('No proxy available for QM session creation');
           break; // Skip session creation if no proxy is available
@@ -294,7 +294,7 @@ async function searchAndSpawnJobs(
 
 // API call function to search symbols via QM
 async function searchQMSymbolsAPI(query: string): Promise<string[]> {
-  const proxyInfo = await proxyManager.getRandomProxy();
+  const proxyInfo = await ProxyManager.getInstance().getRandomProxy();
 
   if (!proxyInfo) {
     throw new Error('No proxy available for QM API call');

apps/data-service/src/providers/webshare.provider.ts

@@ -7,7 +7,7 @@ import {
   handlerRegistry,
   type HandlerConfigWithSchedule,
 } from '@stock-bot/queue';
-import { proxyManager } from '@stock-bot/utils';
+import { ProxyManager } from '@stock-bot/utils';
 
 const logger = getLogger('webshare-provider');
 
@@ -28,7 +28,7 @@ export function initializeWebShareProvider() {
           
           if (proxies.length > 0) {
             // Update the centralized proxy manager
-            await proxyManager.updateProxies(proxies);
+            await ProxyManager.getInstance().updateProxies(proxies);
             
             logger.info('Updated proxy manager with WebShare proxies', { 
               count: proxies.length,
@@ -66,7 +66,7 @@ export function initializeWebShareProvider() {
           const validationResults = await validateStoredProxies();
           
           // Update proxy manager with validated proxies
-          await proxyManager.updateProxies(validationResults.workingProxies);
+          await ProxyManager.getInstance().updateProxies(validationResults.workingProxies);
           
           logger.info('Proxy validation completed', {
             totalChecked: validationResults.totalChecked,
@@ -87,7 +87,7 @@ export function initializeWebShareProvider() {
       }),
 
       'get-stats': createJobHandler(async () => {
-        const stats = proxyManager.getStats();
+        const stats = ProxyManager.getInstance().getStats();
         logger.info('Proxy manager statistics', stats);
         return stats;
       }),
@@ -128,7 +128,7 @@ export function initializeWebShareProvider() {
 
 // Legacy function for backward compatibility - now uses centralized proxy manager
 export async function getProxy(): Promise<string | null> {
-  const proxy = await proxyManager.getRandomProxy();
+  const proxy = ProxyManager.getInstance().getRandomProxy();
   if (!proxy) {
     return null;
   }

apps/data-service/src/providers/webshare.tasks.ts

@@ -3,7 +3,7 @@
  */
 import { getLogger } from '@stock-bot/logger';
 import { HttpClient, type ProxyInfo } from '@stock-bot/http';
-import { proxyManager } from '@stock-bot/utils';
+import { ProxyManager } from '@stock-bot/utils';
 
 const logger = getLogger('webshare-tasks');
 
@@ -94,7 +94,7 @@ export async function validateStoredProxies(): Promise<{
   const testUrl = 'https://httpbin.org/ip'; // Simple IP echo service
   
   // Get all proxies from proxy manager
-  const allProxies = await proxyManager.getAllProxies();
+  const allProxies = ProxyManager.getInstance().getAllProxies();
   
   if (allProxies.length === 0) {
     logger.warn('No proxies available for validation');

libs/utils/src/proxy/index.ts

@@ -1,5 +1,5 @@
 /**
  * Proxy management utilities
  */
-export { ProxyManager, proxyManager } from './proxy-manager';
+export { default as ProxyManager } from './proxy-manager';
 export type { ProxyInfo } from '@stock-bot/http'; // Re-export for convenience

libs/utils/src/proxy/proxy-manager.ts

@@ -9,12 +9,13 @@ import type { ProxyInfo } from '@stock-bot/http';
 const logger = getLogger('proxy-manager');
 
 export class ProxyManager {
+  private static instance: ProxyManager | null = null;
   private cache: CacheProvider;
   private proxies: ProxyInfo[] = [];
   private lastUpdate: Date | null = null;
   private isInitialized = false;
 
-  constructor() {
+  private constructor() {
     const databaseConfig = getDatabaseConfig();
     this.cache = createCache({
       redisConfig: databaseConfig.dragonfly,
@@ -25,9 +26,9 @@ export class ProxyManager {
   }
 
   /**
-   * Initialize the proxy manager - loads existing proxies from cache
+   * Internal initialization - loads existing proxies from cache
    */
-  async initialize(): Promise<void> {
+  private async initializeInternal(): Promise<void> {
     if (this.isInitialized) {
       return;
     }
@@ -47,17 +48,18 @@ export class ProxyManager {
   }
 
   /**
-   * Get a random working proxy from the available pool
+   * Get a random working proxy from the available pool (synchronous)
    */
-  async getRandomProxy(): Promise<ProxyInfo | null> {
+  getRandomProxy(): ProxyInfo | null {
     // Ensure initialized
     if (!this.isInitialized) {
-      await this.initialize();
+      throw new Error('ProxyManager not initialized');
     }
 
-    // Load from cache if memory is empty
+    // Return null if no proxies available
     if (this.proxies.length === 0) {
-      await this.loadFromCache();
+      logger.warn('No proxies available in memory');
+      return null;
     }
 
     // Filter for working proxies (not explicitly marked as non-working)
@@ -96,15 +98,11 @@ export class ProxyManager {
   }
 
   /**
-   * Get all working proxies
+   * Get all working proxies (synchronous)
    */
-  async getWorkingProxies(): Promise<ProxyInfo[]> {
+  getWorkingProxies(): ProxyInfo[] {
     if (!this.isInitialized) {
-      await this.initialize();
-    }
-
-    if (this.proxies.length === 0) {
-      await this.loadFromCache();
+      throw new Error('ProxyManager not initialized');
     }
 
     return this.proxies.filter(proxy => proxy.isWorking !== false);
@@ -113,13 +111,9 @@ export class ProxyManager {
   /**
    * Get all proxies (working and non-working)
    */
-  async getAllProxies(): Promise<ProxyInfo[]> {
+  getAllProxies(): ProxyInfo[] {
     if (!this.isInitialized) {
-      await this.initialize();
-    }
-
-    if (this.proxies.length === 0) {
-      await this.loadFromCache();
+      throw new Error('ProxyManager not initialized');
     }
 
     return [...this.proxies];
@@ -250,7 +244,34 @@ export class ProxyManager {
       logger.error('Failed to load proxies from cache', { error });
     }
   }
+
+  /**
+   * Initialize the singleton instance
+   */
+  static async initialize(): Promise<void> {
+    if (!ProxyManager.instance) {
+      ProxyManager.instance = new ProxyManager();
+      await ProxyManager.instance.initializeInternal();
+    }
+  }
+
+  /**
+   * Get the singleton instance (must be initialized first)
+   */
+  static getInstance(): ProxyManager {
+    if (!ProxyManager.instance) {
+      throw new Error('ProxyManager not initialized. Call ProxyManager.initialize() first.');
+    }
+    return ProxyManager.instance;
+  }
+
+  /**
+   * Reset the singleton instance (for testing)
+   */
+  static reset(): void {
+    ProxyManager.instance = null;
+  }
 }
 
-// Singleton instance for easy import
-export const proxyManager = new ProxyManager();
+// Export the class as default
+export default ProxyManager;