qapinterface/lib/services/retry-handler.js

Comprehensive API utilities for Node.js applications including authentication, security, request processing, and response handling with zero external dependencies

/**
 * Retry Handler Service
 * Single Responsibility: Handle retry logic with exponential backoff
 */

const { DEFAULT_INITIAL_DELAY_MS } = require('../../config/localVars');

/**
 * Validates a service connection with retry logic.
 * @param {function} connectionTest - Function that returns a promise for the connection test.
 * @param {object} [options={}] - Retry options.
 * @returns {Promise<object>} - Connection validation result.
 */
async function validateServiceConnection(connectionTest, options = {}) {
  const { maxRetries = 3, baseDelay = DEFAULT_INITIAL_DELAY_MS } = options;
  
  for (let attempt = 1; attempt <= maxRetries; attempt++) {
    try {
      const result = await connectionTest();
      return { success: true, result, attempt };
    } catch (error) {
      if (attempt === maxRetries) {
        return { success: false, error: error.message, attempts: attempt };
      }
      
      // Exponential backoff
      const delay = baseDelay * Math.pow(2, attempt - 1);
      await new Promise(resolve => setTimeout(resolve, delay));
    }
  }
}

module.exports = {
  validateServiceConnection
};