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If not specified, it will limit to 3 retries.\n   */\n  maxRetries?: number;\n  /**\n   * Logger. If it's not provided, a default logger is used.\n   */\n  logger?: AzureLogger;\n}\n\n/**\n * retryPolicy is a generic policy to enable retrying requests when certain conditions are met\n */\nexport function retryPolicy(\n  strategies: RetryStrategy[],\n  options: RetryPolicyOptions = { maxRetries: DEFAULT_RETRY_POLICY_COUNT },\n): PipelinePolicy {\n  const logger = options.logger || retryPolicyLogger;\n  return {\n    name: retryPolicyName,\n    async sendRequest(request: PipelineRequest, next: SendRequest): Promise<PipelineResponse> {\n      let response: PipelineResponse | undefined;\n      let responseError: RestError | undefined;\n      let retryCount = -1;\n\n      // eslint-disable-next-line no-constant-condition\n      retryRequest: while (true) {\n        retryCount += 1;\n        response = undefined;\n        responseError = undefined;\n\n        try {\n          logger.info(`Retry ${retryCount}: Attempting to send request`, request.requestId);\n          response = await next(request);\n          logger.info(`Retry ${retryCount}: Received a response from request`, request.requestId);\n        } catch (e: any) {\n          logger.error(`Retry ${retryCount}: Received an error from request`, request.requestId);\n\n          // RestErrors are valid targets for the retry strategies.\n          // If none of the retry strategies can work with them, they will be thrown later in this policy.\n          // If the received error is not a RestError, it is immediately thrown.\n          responseError = e as RestError;\n          if (!e || responseError.name !== \"RestError\") {\n            throw e;\n          }\n\n          response = responseError.response;\n        }\n\n        if (request.abortSignal?.aborted) {\n          logger.error(`Retry ${retryCount}: Request aborted.`);\n          const abortError = new AbortError();\n          throw abortError;\n        }\n\n        if (retryCount >= (options.maxRetries ?? DEFAULT_RETRY_POLICY_COUNT)) {\n          logger.info(\n            `Retry ${retryCount}: Maximum retries reached. Returning the last received response, or throwing the last received error.`,\n          );\n          if (responseError) {\n            throw responseError;\n          } else if (response) {\n            return response;\n          } else {\n            throw new Error(\"Maximum retries reached with no response or error to throw\");\n          }\n        }\n\n        logger.info(`Retry ${retryCount}: Processing ${strategies.length} retry strategies.`);\n\n        strategiesLoop: for (const strategy of strategies) {\n          const strategyLogger = strategy.logger || retryPolicyLogger;\n          strategyLogger.info(`Retry ${retryCount}: Processing retry strategy ${strategy.name}.`);\n\n          const modifiers = strategy.retry({\n            retryCount,\n            response,\n            responseError,\n          });\n\n          if (modifiers.skipStrategy) {\n            strategyLogger.info(`Retry ${retryCount}: Skipped.`);\n            continue strategiesLoop;\n          }\n\n          const { errorToThrow, retryAfterInMs, redirectTo } = modifiers;\n\n          if (errorToThrow) {\n            strategyLogger.error(\n              `Retry ${retryCount}: Retry strategy ${strategy.name} throws error:`,\n              errorToThrow,\n            );\n            throw errorToThrow;\n          }\n\n          if (retryAfterInMs || retryAfterInMs === 0) {\n            strategyLogger.info(\n              `Retry ${retryCount}: Retry strategy ${strategy.name} retries after ${retryAfterInMs}`,\n            );\n            await delay(retryAfterInMs, undefined, { abortSignal: request.abortSignal });\n            continue retryRequest;\n          }\n\n          if (redirectTo) {\n            strategyLogger.info(\n              `Retry ${retryCount}: Retry strategy ${strategy.name} redirects to ${redirectTo}`,\n            );\n            request.url = redirectTo;\n            continue retryRequest;\n          }\n        }\n\n        if (responseError) {\n          logger.info(\n            `None of the retry strategies could work with the received error. Throwing it.`,\n          );\n          throw responseError;\n        }\n        if (response) {\n          logger.info(\n            `None of the retry strategies could work with the received response. Returning it.`,\n          );\n          return response;\n        }\n\n        // If all the retries skip and there's no response,\n        // we're still in the retry loop, so a new request will be sent\n        // until `maxRetries` is reached.\n      }\n    },\n  };\n}\n"]}