@push.rocks/smartdata
Version:
An advanced library for NoSQL data organization and manipulation using TypeScript with support for MongoDB, data validation, collections, and custom data types.
314 lines • 28.6 kB
JavaScript
var __esDecorate = (this && this.__esDecorate) || function (ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
var _, done = false;
for (var i = decorators.length - 1; i >= 0; i--) {
var context = {};
for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
for (var p in contextIn.access) context.access[p] = contextIn.access[p];
context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
if (kind === "accessor") {
if (result === void 0) continue;
if (result === null || typeof result !== "object") throw new TypeError("Object expected");
if (_ = accept(result.get)) descriptor.get = _;
if (_ = accept(result.set)) descriptor.set = _;
if (_ = accept(result.init)) initializers.unshift(_);
}
else if (_ = accept(result)) {
if (kind === "field") initializers.unshift(_);
else descriptor[key] = _;
}
}
if (target) Object.defineProperty(target, contextIn.name, descriptor);
done = true;
};
var __runInitializers = (this && this.__runInitializers) || function (thisArg, initializers, value) {
var useValue = arguments.length > 2;
for (var i = 0; i < initializers.length; i++) {
value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
}
return useValue ? value : void 0;
};
import * as plugins from './plugins.js';
import { SmartdataDb } from './classes.db.js';
import { managed, setDefaultManagerForDoc } from './classes.collection.js';
import { SmartDataDbDoc, svDb, unI } from './classes.doc.js';
import { SmartdataDbWatcher } from './classes.watcher.js';
import { logger } from './logging.js';
let DistributedClass = (() => {
let _classDecorators = [managed()];
let _classDescriptor;
let _classExtraInitializers = [];
let _classThis;
let _classSuper = SmartDataDbDoc;
let _id_decorators;
let _id_initializers = [];
let _id_extraInitializers = [];
let _data_decorators;
let _data_initializers = [];
let _data_extraInitializers = [];
var DistributedClass = class extends _classSuper {
static { _classThis = this; }
static {
const _metadata = typeof Symbol === "function" && Symbol.metadata ? Object.create(_classSuper[Symbol.metadata] ?? null) : void 0;
_id_decorators = [unI()];
_data_decorators = [svDb()];
__esDecorate(null, null, _id_decorators, { kind: "field", name: "id", static: false, private: false, access: { has: obj => "id" in obj, get: obj => obj.id, set: (obj, value) => { obj.id = value; } }, metadata: _metadata }, _id_initializers, _id_extraInitializers);
__esDecorate(null, null, _data_decorators, { kind: "field", name: "data", static: false, private: false, access: { has: obj => "data" in obj, get: obj => obj.data, set: (obj, value) => { obj.data = value; } }, metadata: _metadata }, _data_initializers, _data_extraInitializers);
__esDecorate(null, _classDescriptor = { value: _classThis }, _classDecorators, { kind: "class", name: _classThis.name, metadata: _metadata }, null, _classExtraInitializers);
DistributedClass = _classThis = _classDescriptor.value;
if (_metadata) Object.defineProperty(_classThis, Symbol.metadata, { enumerable: true, configurable: true, writable: true, value: _metadata });
__runInitializers(_classThis, _classExtraInitializers);
}
// INSTANCE
id = __runInitializers(this, _id_initializers, void 0);
data = (__runInitializers(this, _id_extraInitializers), __runInitializers(this, _data_initializers, void 0));
constructor() {
super(...arguments);
__runInitializers(this, _data_extraInitializers);
}
};
return DistributedClass = _classThis;
})();
export { DistributedClass };
/**
* This file implements a distributed coordinator according to the @pushrocks/taskbuffer standard.
* you should not set up this yourself. Instead, there is a factory on the SmartdataDb class
* that will take care of setting this up.
*/
export class SmartdataDistributedCoordinator extends plugins.taskbuffer.distributedCoordination
.AbstractDistributedCoordinator {
readyPromise;
db;
asyncExecutionStack = new plugins.lik.AsyncExecutionStack();
ownInstance;
distributedWatcher;
constructor(dbArg) {
super();
this.db = dbArg;
setDefaultManagerForDoc(this, DistributedClass);
this.readyPromise = this.db.statusConnectedDeferred.promise;
}
// smartdata specific stuff
async start() {
await this.init();
}
async stop() {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
if (this.distributedWatcher) {
await this.distributedWatcher.close();
}
if (this.ownInstance?.data.elected) {
this.ownInstance.data.elected = false;
}
if (this.ownInstance?.data.status === 'stopped') {
logger.log('warn', `stopping a distributed instance that has not been started yet.`);
}
this.ownInstance.data.status = 'stopped';
await this.ownInstance.save();
logger.log('info', `stopped ${this.ownInstance.id}`);
});
}
id = plugins.smartunique.uni('distributedInstance');
startHeartbeat = async () => {
while (this.ownInstance.data.status !== 'stopped') {
await this.sendHeartbeat();
await plugins.smartdelay.delayForRandom(5000, 10000);
}
};
async sendHeartbeat() {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
if (this.ownInstance.data.status === 'stopped') {
logger.log('debug', `aborted sending heartbeat because status is stopped`);
return;
}
await this.ownInstance.updateFromDb();
this.ownInstance.data.lastUpdated = Date.now();
await this.ownInstance.save();
logger.log('debug', `sent heartbeat for ${this.ownInstance.id}`);
const allInstances = DistributedClass.getInstances({});
});
if (this.ownInstance.data.status === 'stopped') {
logger.log('info', `aborted sending heartbeat because status is stopped`);
return;
}
const eligibleLeader = await this.getEligibleLeader();
// not awaiting here because we don't want to block the heartbeat
this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
if (!eligibleLeader && this.ownInstance.data.status === 'settled') {
this.checkAndMaybeLead();
}
});
}
async init() {
await this.readyPromise;
if (!this.ownInstance) {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
this.ownInstance = new DistributedClass();
this.ownInstance.id = this.id;
this.ownInstance.data = {
elected: false,
lastUpdated: Date.now(),
status: 'initializing',
taskRequests: [],
taskRequestResults: [],
};
await this.ownInstance.save();
});
}
else {
logger.log('warn', `distributed instance already initialized`);
}
// lets enable the heartbeat
this.startHeartbeat();
// lets do a leader check
await this.checkAndMaybeLead();
return this.ownInstance;
}
async getEligibleLeader() {
return this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
const allInstances = await DistributedClass.getInstances({});
let leaders = allInstances.filter((instanceArg) => instanceArg.data.elected === true);
const eligibleLeader = leaders.find((leader) => leader.data.lastUpdated >=
Date.now() - plugins.smarttime.getMilliSecondsFromUnits({ seconds: 20 }));
return eligibleLeader;
});
}
// --> leader election
async checkAndMaybeLead() {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
this.ownInstance.data.status = 'initializing';
await this.ownInstance.save();
});
if (await this.getEligibleLeader()) {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
await this.ownInstance.updateFromDb();
this.ownInstance.data.status = 'settled';
await this.ownInstance.save();
logger.log('info', `${this.ownInstance.id} settled as follower`);
});
return;
}
else if ((await DistributedClass.getInstances({})).find((instanceArg) => {
return instanceArg.data.status === 'bidding' &&
instanceArg.data.biddingStartTime <= Date.now() - 4000 &&
instanceArg.data.biddingStartTime >= Date.now() - 30000;
})) {
logger.log('info', 'too late to the bidding party... waiting for next round.');
return;
}
else {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
await this.ownInstance.updateFromDb();
this.ownInstance.data.status = 'bidding';
this.ownInstance.data.biddingStartTime = Date.now();
this.ownInstance.data.biddingShortcode = plugins.smartunique.shortId();
await this.ownInstance.save();
logger.log('info', 'bidding code stored.');
});
logger.log('info', `bidding for leadership...`);
await plugins.smartdelay.delayFor(plugins.smarttime.getMilliSecondsFromUnits({ seconds: 5 }));
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
let biddingInstances = await DistributedClass.getInstances({});
biddingInstances = biddingInstances.filter((instanceArg) => instanceArg.data.status === 'bidding' &&
instanceArg.data.lastUpdated >=
Date.now() - plugins.smarttime.getMilliSecondsFromUnits({ seconds: 10 }));
logger.log('info', `found ${biddingInstances.length} bidding instances...`);
this.ownInstance.data.elected = true;
for (const biddingInstance of biddingInstances) {
if (biddingInstance.data.biddingShortcode < this.ownInstance.data.biddingShortcode) {
this.ownInstance.data.elected = false;
}
}
await plugins.smartdelay.delayFor(5000);
logger.log('info', `settling with status elected = ${this.ownInstance.data.elected}`);
this.ownInstance.data.status = 'settled';
await this.ownInstance.save();
});
if (this.ownInstance.data.elected) {
this.leadFunction();
}
}
}
/**
* when it has been determined
* that this instance is leading
* the leading is implemented here
*/
async leadFunction() {
this.distributedWatcher = await DistributedClass.watch({});
const currentTaskRequests = [];
this.distributedWatcher.changeSubject.subscribe({
next: async (distributedDoc) => {
if (!distributedDoc) {
logger.log('info', `registered deletion of instance...`);
return;
}
logger.log('info', distributedDoc);
logger.log('info', `registered change for ${distributedDoc.id}`);
distributedDoc;
},
});
while (this.ownInstance.data.status !== 'stopped' && this.ownInstance.data.elected) {
const allInstances = await DistributedClass.getInstances({});
for (const instance of allInstances) {
if (instance.data.status === 'stopped') {
await instance.delete();
}
}
await plugins.smartdelay.delayFor(10000);
}
}
// abstract implemented methods
async fireDistributedTaskRequest(taskRequestArg) {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
if (!this.ownInstance) {
logger.log('error', 'instance need to be started first...');
return;
}
await this.ownInstance.updateFromDb();
this.ownInstance.data.taskRequests.push(taskRequestArg);
await this.ownInstance.save();
});
await plugins.smartdelay.delayFor(10000);
const result = await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
await this.ownInstance.updateFromDb();
const taskRequestResult = this.ownInstance.data.taskRequestResults.find((resultItem) => {
return resultItem.requestResponseId === taskRequestArg.requestResponseId;
});
return taskRequestResult;
});
if (!result) {
logger.log('warn', 'no result found for task request...');
return null;
}
return result;
}
async updateDistributedTaskRequest(infoBasisArg) {
await this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
const existingInfoBasis = this.ownInstance.data.taskRequests.find((infoBasisItem) => {
return (infoBasisItem.taskName === infoBasisArg.taskName &&
infoBasisItem.taskExecutionTime === infoBasisArg.taskExecutionTime);
});
if (!existingInfoBasis) {
logger.log('warn', 'trying to update a non existing task request... aborting!');
return;
}
Object.assign(existingInfoBasis, infoBasisArg);
await this.ownInstance.save();
plugins.smartdelay.delayFor(60000).then(() => {
this.asyncExecutionStack.getExclusiveExecutionSlot(async () => {
const indexToRemove = this.ownInstance.data.taskRequests.indexOf(existingInfoBasis);
if (indexToRemove >= 0) {
this.ownInstance.data.taskRequests.splice(indexToRemove, 1);
await this.ownInstance.save();
}
});
});
});
}
}
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