aws-event-stream
Version:
A simple and fast EventStore for AWS.
123 lines • 6.05 kB
JavaScript
;
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 };
}
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.InMemoryProvider = void 0;
/**
* A Persistence Provider that handle all the data in memory. It is a very simple implementation that should be used
* only for development and test purposes.
*/
var InMemoryProvider = /** @class */ (function () {
function InMemoryProvider() {
this.store = new Map();
}
InMemoryProvider.prototype.addEvent = function (stream, data, type) {
if (type === void 0) { type = ''; }
return __awaiter(this, void 0, void 0, function () {
var currentEvents, event;
return __generator(this, function (_a) {
switch (_a.label) {
case 0: return [4 /*yield*/, this.getEventsList(stream.aggregation, stream.id)];
case 1:
currentEvents = _a.sent();
event = {
commitTimestamp: new Date().getTime(),
eventType: type,
payload: data,
sequence: currentEvents.length,
};
currentEvents.push(event);
return [2 /*return*/, event];
}
});
});
};
InMemoryProvider.prototype.getEvents = function (stream, offset, limit) {
if (offset === void 0) { offset = 0; }
return __awaiter(this, void 0, void 0, function () {
var history;
return __generator(this, function (_a) {
history = this.getEventsList(stream.aggregation, stream.id);
return [2 /*return*/, this.take(history.slice(offset), limit || history.length)];
});
});
};
InMemoryProvider.prototype.getAggregations = function (offset, limit) {
if (offset === void 0) { offset = 0; }
return __awaiter(this, void 0, void 0, function () {
var keys;
return __generator(this, function (_a) {
keys = Array.from(this.store.keys());
return [2 /*return*/, this.take(keys.sort().slice(offset), (limit || this.store.size))];
});
});
};
InMemoryProvider.prototype.getStreams = function (aggregation, offset, limit) {
if (offset === void 0) { offset = 0; }
return __awaiter(this, void 0, void 0, function () {
var streams, keys;
return __generator(this, function (_a) {
streams = this.store.get(aggregation);
if (streams) {
keys = Array.from(streams.keys());
return [2 /*return*/, this.take(keys.sort().slice(offset), limit || this.store.size)];
}
return [2 /*return*/, []];
});
});
};
InMemoryProvider.prototype.take = function (array, n) {
if (n === void 0) { n = 1; }
return array.slice(0, n < 0 ? 0 : n);
};
InMemoryProvider.prototype.getEventsList = function (aggregation, streamId) {
var streams = this.store.get(aggregation);
if (!streams) {
streams = new Map();
this.store.set(aggregation, streams);
}
var history = streams.get(streamId);
if (!history) {
history = new Array();
streams.set(streamId, history);
}
return history;
};
return InMemoryProvider;
}());
exports.InMemoryProvider = InMemoryProvider;
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