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Viewing file:     StandardRetryStrategy.js (4.14 KB)      -rw-r--r--

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.StandardRetryStrategy = void 0;
const protocol_http_1 = require("@aws-sdk/protocol-http");
const service_error_classification_1 = require("@aws-sdk/service-error-classification");
const uuid_1 = require("uuid");
const config_1 = require("./config");
const constants_1 = require("./constants");
const defaultRetryQuota_1 = require("./defaultRetryQuota");
const delayDecider_1 = require("./delayDecider");
const retryDecider_1 = require("./retryDecider");
class StandardRetryStrategy {
    constructor(maxAttemptsProvider, options) {
        var _a, _b, _c;
        this.maxAttemptsProvider = maxAttemptsProvider;
        this.mode = config_1.RETRY_MODES.STANDARD;
        this.retryDecider = (_a = options === null || options === void 0 ? void 0 : options.retryDecider) !== null && _a !== void 0 ? _a : retryDecider_1.defaultRetryDecider;
        this.delayDecider = (_b = options === null || options === void 0 ? void 0 : options.delayDecider) !== null && _b !== void 0 ? _b : delayDecider_1.defaultDelayDecider;
        this.retryQuota = (_c = options === null || options === void 0 ? void 0 : options.retryQuota) !== null && _c !== void 0 ? _c : (0, defaultRetryQuota_1.getDefaultRetryQuota)(constants_1.INITIAL_RETRY_TOKENS);
    }
    shouldRetry(error, attempts, maxAttempts) {
        return attempts < maxAttempts && this.retryDecider(error) && this.retryQuota.hasRetryTokens(error);
    }
    async getMaxAttempts() {
        let maxAttempts;
        try {
            maxAttempts = await this.maxAttemptsProvider();
        }
        catch (error) {
            maxAttempts = config_1.DEFAULT_MAX_ATTEMPTS;
        }
        return maxAttempts;
    }
    async retry(next, args, options) {
        let retryTokenAmount;
        let attempts = 0;
        let totalDelay = 0;
        const maxAttempts = await this.getMaxAttempts();
        const { request } = args;
        if (protocol_http_1.HttpRequest.isInstance(request)) {
            request.headers[constants_1.INVOCATION_ID_HEADER] = (0, uuid_1.v4)();
        }
        while (true) {
            try {
                if (protocol_http_1.HttpRequest.isInstance(request)) {
                    request.headers[constants_1.REQUEST_HEADER] = `attempt=${attempts + 1}; max=${maxAttempts}`;
                }
                if (options === null || options === void 0 ? void 0 : options.beforeRequest) {
                    await options.beforeRequest();
                }
                const { response, output } = await next(args);
                if (options === null || options === void 0 ? void 0 : options.afterRequest) {
                    options.afterRequest(response);
                }
                this.retryQuota.releaseRetryTokens(retryTokenAmount);
                output.$metadata.attempts = attempts + 1;
                output.$metadata.totalRetryDelay = totalDelay;
                return { response, output };
            }
            catch (e) {
                const err = asSdkError(e);
                attempts++;
                if (this.shouldRetry(err, attempts, maxAttempts)) {
                    retryTokenAmount = this.retryQuota.retrieveRetryTokens(err);
                    const delay = this.delayDecider((0, service_error_classification_1.isThrottlingError)(err) ? constants_1.THROTTLING_RETRY_DELAY_BASE : constants_1.DEFAULT_RETRY_DELAY_BASE, attempts);
                    totalDelay += delay;
                    await new Promise((resolve) => setTimeout(resolve, delay));
                    continue;
                }
                if (!err.$metadata) {
                    err.$metadata = {};
                }
                err.$metadata.attempts = attempts;
                err.$metadata.totalRetryDelay = totalDelay;
                throw err;
            }
        }
    }
}
exports.StandardRetryStrategy = StandardRetryStrategy;
const asSdkError = (error) => {
    if (error instanceof Error)
        return error;
    if (error instanceof Object)
        return Object.assign(new Error(), error);
    if (typeof error === "string")
        return new Error(error);
    return new Error(`AWS SDK error wrapper for ${error}`);
};