update
This commit is contained in:
Juergen Kunz
309
ts/stocks/classes.stockservice.ts
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309
ts/stocks/classes.stockservice.ts
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import * as plugins from '../plugins.js';
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import type { IStockProvider, IProviderConfig, IProviderRegistry } from './interfaces/provider.js';
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import type { IStockPrice, IStockQuoteRequest, IStockBatchQuoteRequest, IStockPriceError } from './interfaces/stockprice.js';
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interface IProviderEntry {
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provider: IStockProvider;
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config: IProviderConfig;
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lastError?: Error;
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lastErrorTime?: Date;
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successCount: number;
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errorCount: number;
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}
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interface ICacheEntry {
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price: IStockPrice;
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timestamp: Date;
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}
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export class StockPriceService implements IProviderRegistry {
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private providers = new Map<string, IProviderEntry>();
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private cache = new Map<string, ICacheEntry>();
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private logger = console;
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private cacheConfig = {
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ttl: 60000, // 60 seconds default
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maxEntries: 1000
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};
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constructor(cacheConfig?: { ttl?: number; maxEntries?: number }) {
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if (cacheConfig) {
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this.cacheConfig = { ...this.cacheConfig, ...cacheConfig };
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}
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}
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public register(provider: IStockProvider, config?: IProviderConfig): void {
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const defaultConfig: IProviderConfig = {
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enabled: true,
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priority: provider.priority,
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timeout: 10000,
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retryAttempts: 2,
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retryDelay: 1000
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};
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const mergedConfig = { ...defaultConfig, ...config };
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this.providers.set(provider.name, {
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provider,
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config: mergedConfig,
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successCount: 0,
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errorCount: 0
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});
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console.log(`Registered provider: ${provider.name}`);
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}
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public unregister(providerName: string): void {
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this.providers.delete(providerName);
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console.log(`Unregistered provider: ${providerName}`);
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}
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public getProvider(name: string): IStockProvider | undefined {
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return this.providers.get(name)?.provider;
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}
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public getAllProviders(): IStockProvider[] {
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return Array.from(this.providers.values()).map(entry => entry.provider);
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}
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public getEnabledProviders(): IStockProvider[] {
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return Array.from(this.providers.values())
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.filter(entry => entry.config.enabled)
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.sort((a, b) => (b.config.priority || 0) - (a.config.priority || 0))
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.map(entry => entry.provider);
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}
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public async getPrice(request: IStockQuoteRequest): Promise<IStockPrice> {
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const cacheKey = this.getCacheKey(request);
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const cached = this.getFromCache(cacheKey);
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if (cached) {
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console.log(`Cache hit for ${request.ticker}`);
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return cached;
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}
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const providers = this.getEnabledProviders();
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if (providers.length === 0) {
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throw new Error('No stock price providers available');
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}
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let lastError: Error | undefined;
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for (const provider of providers) {
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const entry = this.providers.get(provider.name)!;
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try {
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const price = await this.fetchWithRetry(
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() => provider.fetchPrice(request),
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entry.config
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);
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entry.successCount++;
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this.addToCache(cacheKey, price);
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console.log(`Successfully fetched ${request.ticker} from ${provider.name}`);
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return price;
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} catch (error) {
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entry.errorCount++;
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entry.lastError = error as Error;
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entry.lastErrorTime = new Date();
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lastError = error as Error;
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console.warn(
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`Provider ${provider.name} failed for ${request.ticker}: ${error.message}`
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);
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}
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}
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throw new Error(
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`Failed to fetch price for ${request.ticker} from all providers. Last error: ${lastError?.message}`
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);
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}
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public async getPrices(request: IStockBatchQuoteRequest): Promise<IStockPrice[]> {
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const cachedPrices: IStockPrice[] = [];
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const tickersToFetch: string[] = [];
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// Check cache for each ticker
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for (const ticker of request.tickers) {
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const cacheKey = this.getCacheKey({ ticker, includeExtendedHours: request.includeExtendedHours });
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const cached = this.getFromCache(cacheKey);
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if (cached) {
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cachedPrices.push(cached);
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} else {
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tickersToFetch.push(ticker);
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}
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}
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if (tickersToFetch.length === 0) {
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console.log(`All ${request.tickers.length} tickers served from cache`);
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return cachedPrices;
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}
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const providers = this.getEnabledProviders();
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if (providers.length === 0) {
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throw new Error('No stock price providers available');
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}
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let lastError: Error | undefined;
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let fetchedPrices: IStockPrice[] = [];
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for (const provider of providers) {
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const entry = this.providers.get(provider.name)!;
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try {
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fetchedPrices = await this.fetchWithRetry(
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() => provider.fetchPrices({
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tickers: tickersToFetch,
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includeExtendedHours: request.includeExtendedHours
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}),
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entry.config
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);
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entry.successCount++;
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// Cache the fetched prices
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for (const price of fetchedPrices) {
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const cacheKey = this.getCacheKey({
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ticker: price.ticker,
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includeExtendedHours: request.includeExtendedHours
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});
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this.addToCache(cacheKey, price);
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}
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console.log(
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`Successfully fetched ${fetchedPrices.length} prices from ${provider.name}`
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);
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break;
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} catch (error) {
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entry.errorCount++;
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entry.lastError = error as Error;
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entry.lastErrorTime = new Date();
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lastError = error as Error;
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console.warn(
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`Provider ${provider.name} failed for batch request: ${error.message}`
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);
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}
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}
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if (fetchedPrices.length === 0 && lastError) {
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throw new Error(
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`Failed to fetch prices from all providers. Last error: ${lastError.message}`
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);
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}
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return [...cachedPrices, ...fetchedPrices];
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}
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public async checkProvidersHealth(): Promise<Map<string, boolean>> {
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const health = new Map<string, boolean>();
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for (const [name, entry] of this.providers) {
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if (!entry.config.enabled) {
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health.set(name, false);
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continue;
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}
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try {
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const isAvailable = await entry.provider.isAvailable();
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health.set(name, isAvailable);
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} catch (error) {
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health.set(name, false);
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console.error(`Health check failed for ${name}:`, error);
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}
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}
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return health;
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}
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public getProviderStats(): Map<string, {
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successCount: number;
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errorCount: number;
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lastError?: string;
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lastErrorTime?: Date;
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}> {
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const stats = new Map();
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for (const [name, entry] of this.providers) {
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stats.set(name, {
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successCount: entry.successCount,
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errorCount: entry.errorCount,
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lastError: entry.lastError?.message,
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lastErrorTime: entry.lastErrorTime
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});
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}
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return stats;
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}
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public clearCache(): void {
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this.cache.clear();
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console.log('Cache cleared');
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}
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public setCacheTTL(ttl: number): void {
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this.cacheConfig.ttl = ttl;
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console.log(`Cache TTL set to ${ttl}ms`);
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}
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private async fetchWithRetry<T>(
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fetchFn: () => Promise<T>,
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config: IProviderConfig
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): Promise<T> {
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const maxAttempts = config.retryAttempts || 1;
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let lastError: Error | undefined;
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for (let attempt = 1; attempt <= maxAttempts; attempt++) {
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try {
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return await fetchFn();
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} catch (error) {
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lastError = error as Error;
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if (attempt < maxAttempts) {
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const delay = (config.retryDelay || 1000) * attempt;
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console.log(`Retry attempt ${attempt} after ${delay}ms`);
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await plugins.smartdelay.delayFor(delay);
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}
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}
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}
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throw lastError || new Error('Unknown error during fetch');
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}
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private getCacheKey(request: IStockQuoteRequest): string {
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return `${request.ticker}:${request.includeExtendedHours || false}`;
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}
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private getFromCache(key: string): IStockPrice | null {
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const entry = this.cache.get(key);
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if (!entry) {
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return null;
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}
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const age = Date.now() - entry.timestamp.getTime();
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if (age > this.cacheConfig.ttl) {
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this.cache.delete(key);
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return null;
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}
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return entry.price;
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}
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private addToCache(key: string, price: IStockPrice): void {
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// Enforce max entries limit
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if (this.cache.size >= this.cacheConfig.maxEntries) {
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// Remove oldest entry
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const oldestKey = this.cache.keys().next().value;
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if (oldestKey) {
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this.cache.delete(oldestKey);
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}
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}
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this.cache.set(key, {
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price,
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timestamp: new Date()
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});
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}
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}
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