"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
function verb(n) { return function (v) { return step([n, v]); }; }
function step(op) {
if (f) throw new TypeError("Generator is already executing.");
while (_) try {
if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
if (y = 0, t) op = [op[0] & 2, t.value];
switch (op[0]) {
case 0: case 1: t = op; break;
case 4: _.label++; return { value: op[1], done: false };
case 5: _.label++; y = op[1]; op = [0]; continue;
case 7: op = _.ops.pop(); _.trys.pop(); continue;
default:
if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
if (t[2]) _.ops.pop();
_.trys.pop(); continue;
}
op = body.call(thisArg, _);
} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
}
};
var __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {
if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
if (ar || !(i in from)) {
if (!ar) ar = Array.prototype.slice.call(from, 0, i);
ar[i] = from[i];
}
}
return to.concat(ar || Array.prototype.slice.call(from));
};
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
var chunk_1 = __importDefault(require("lodash/chunk"));
var pipeAsync_1 = __importDefault(require("../async/pipeAsync"));
var wait_1 = __importDefault(require("../async/wait"));
var CHUNK_SIZE = 25;
/**
* Batch write items to dynamoDB with handling for maximum items (25) to write,
* which means with this helper more than 25 items can be written into the database with one call.
* @category AWS
* @module batchWriteDynamodbItems
*/
function batchWriteDynamodbItems(_a) {
var _this = this;
var docClient = _a.docClient, records = _a.records, tableName = _a.tableName, mode = _a.mode, serialize = _a.serialize, _b = _a.requestsMode, requestsMode = _b === void 0 ? 'parallel' : _b, _c = _a.delay, delay = _c === void 0 ? 0 : _c;
if (records.length === 0)
return Promise.resolve(null);
// Chunk records by 25 which is the max number of items DynamoDB can batch write.
var chunks = (0, chunk_1.default)(records, CHUNK_SIZE);
var sendRequest = function (chunkedRecords) { return __awaiter(_this, void 0, void 0, function () {
var items, RequestItems, output;
var _a;
return __generator(this, function (_b) {
switch (_b.label) {
case 0:
items = chunkedRecords.map(function (rec) {
var _a, _b;
return (_a = {},
_a[mode === 'put' ? 'PutRequest' : 'DeleteRequest'] = (_b = {},
_b[mode === 'put' ? 'Item' : 'Key'] = (serialize ? serialize(rec) : rec),
_b),
_a);
});
RequestItems = (_a = {},
_a[tableName] = items,
_a);
return [4 /*yield*/, docClient.batchWrite({ RequestItems: RequestItems }).promise()];
case 1:
output = _b.sent();
if (!(requestsMode === 'pipe' && delay > 0)) return [3 /*break*/, 3];
return [4 /*yield*/, (0, wait_1.default)(delay)];
case 2:
_b.sent();
_b.label = 3;
case 3: return [2 /*return*/, output];
}
});
}); };
var pipedFuncs = chunks.map(function (chunkedRecords) { return function (input) {
if (input === void 0) { input = []; }
return __awaiter(_this, void 0, void 0, function () {
var output;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, sendRequest(chunkedRecords)];
case 1:
output = _a.sent();
return [2 /*return*/, __spreadArray(__spreadArray([], input, true), [output], false)];
}
});
});
}; });
// Send batch requests with pipe
if (requestsMode === 'pipe')
return pipeAsync_1.default.apply(void 0, pipedFuncs)([]);
// Send batch requests in parallel for each chunk
return Promise.all(chunks.map(sendRequest));
}
exports.default = batchWriteDynamodbItems;
Source