shopify-reliability-patterns

# Shopify Reliability Patterns ## Overview Build fault-tolerant Shopify integrations that handle API outages, webhook retry storms, and rate limit exhaustion gracefully. ## Prerequisites - Understanding of circuit breaker pattern - Queue infrastructure (BullMQ, SQS, etc.) for async processing - Cache layer for fallback data ## Instructions ### Step 1: Circuit Breaker for Shopify API ```typescript import CircuitBreaker from "opossum"; // Create circuit breaker wrapping Shopify API calls const shopifyCircuit = new CircuitBreaker( async (fn: () => Promise<any>) => fn(), { timeout: 10000, // 10s timeout per request errorThresholdPercentage: 50, // Open at 50% error rate resetTimeout: 30000, // Try half-open after 30s volumeThreshold: 5, // Need 5 requests before tripping errorFilter: (error: any) => { // Don't count 422 validation errors as circuit failures // Only count 5xx and timeout errors const code = error.response?.code || error.statusCode; return code >= 500 || error.code === "ECONNRESET" || error.code === "ETIMEDOUT"; }, } ); shopifyCircuit.on("open", () => { console.error("[CIRCUIT OPEN] Shopify API failing — serving cached data"); }); shopifyCircuit.on("halfOpen", () => { console.info("[CIRCUIT HALF-OPEN] Testing Shopify recovery..."); }); shopifyCircuit.on("close", () => { console.info("[CIRCUIT CLOSED] Shopify API recovered"); }); // Usage async function res...