Reorganized repo using yarn and workspaces

This commit is contained in:
maciejhirsz
2018-06-27 14:04:34 +02:00
parent 8c3b1ee749
commit 0580e25380
84 changed files with 8434 additions and 701 deletions
-466
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@@ -1,466 +0,0 @@
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"requires": {
"async-limiter": "1.0.0"
}
}
}
}
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{
"name": "dotstats-backend",
"version": "0.1.0",
"author": "Parity Technologies Ltd. <admin@parity.io>",
"license": "GPL-3.0",
"description": "Polkadot Telemetry frontend",
"main": "build/index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"start": "tsc && node build/index.js",
"tsc": "tsc"
},
"dependencies": {
"@types/express": "^4.16.0",
"@types/node": "^10.3.3",
"@types/ws": "^5.1.2",
"express": "^4.16.3",
"typescript": "^2.9.2",
"ws": "5.2.0"
}
}
-77
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import * as EventEmitter from 'events';
import Node from './node';
import Feed, { FeedData } from './feed';
import { Id, IdSet } from './shared';
export default class Aggregator extends EventEmitter {
private nodes: IdSet<Node> = new IdSet<Node>();
private feeds: IdSet<Feed> = new IdSet<Feed>();
public height: number = 0;
constructor() {
super();
setInterval(() => this.timeoutCheck(), 10000);
}
public addNode(node: Node) {
this.nodes.add(node);
this.broadcast(Feed.addedNode(node));
node.once('disconnect', () => {
node.removeAllListeners('block');
this.nodes.remove(node);
this.broadcast(Feed.removedNode(node));
});
node.on('block', () => this.updateBlock(node));
}
public addFeed(feed: Feed) {
this.feeds.add(feed);
feed.send(Feed.bestBlock(this.height));
for (const node of this.nodes.entries) {
feed.send(Feed.addedNode(node));
}
feed.once('disconnect', () => {
this.feeds.remove(feed);
})
}
public nodeList(): IterableIterator<Node> {
return this.nodes.entries;
}
private broadcast(data: FeedData) {
for (const feed of this.feeds.entries) {
feed.send(data);
}
}
private timeoutCheck() {
const now = Date.now();
for (const node of this.nodes.entries) {
node.timeoutCheck(now);
}
}
private updateBlock(node: Node) {
if (node.height > this.height) {
this.height = node.height;
this.broadcast(Feed.bestBlock(this.height));
console.log(`New block ${this.height}`);
}
this.broadcast(Feed.imported(node));
console.log(`${node.name} imported ${node.height}, block time: ${node.blockTime / 1000}s, average: ${node.average / 1000}s | latency ${node.latency}`);
}
}
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import * as WebSocket from 'ws';
import * as EventEmitter from 'events';
import Node, { NodeInfo, BlockInfo } from './node';
import { Opaque, Id, idGenerator } from './shared';
const nextId = idGenerator<Feed>();
export interface BlockInfo {
height: number;
blockTime: number;
}
interface BestBlock {
action: 'best';
payload: number;
}
interface AddedNode {
action: 'added';
payload: [Id<Node>, NodeInfo, BlockInfo];
}
interface RemovedNode {
action: 'removed';
payload: Id<Node>;
}
interface Imported {
action: 'imported';
payload: [Id<Node>, BlockInfo];
}
type Message = BestBlock | AddedNode | RemovedNode | Imported;
/**
* Opaque data type to be sent to the feed. Passing through
* strings means we can only serialize once, no matter how
* many feed clients are listening in.
*/
export type FeedData = Opaque<string, Message>;
function serialize(msg: Message): FeedData {
return JSON.stringify(msg) as FeedData;
}
export default class Feed extends EventEmitter {
public id: Id<Feed>;
private socket: WebSocket;
constructor(socket: WebSocket) {
super();
this.id = nextId();
this.socket = socket;
socket.on('error', () => this.disconnect());
socket.on('close', () => this.disconnect());
}
public static bestBlock(height: number): FeedData {
return serialize({
action: 'best',
payload: height
});
}
public static addedNode(node: Node): FeedData {
return serialize({
action: 'added',
payload: [node.id, node.nodeInfo(), node.blockInfo()]
})
}
public static removedNode(node: Node): FeedData {
return serialize({
action: 'removed',
payload: node.id
});
}
public static imported(node: Node): FeedData {
return serialize({
action: 'imported',
payload: [node.id, node.blockInfo()]
});
}
public send(data: FeedData) {
this.socket.send(data);
}
private disconnect() {
this.socket.removeAllListeners();
this.socket.close();
this.emit('disconnect');
}
}
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import * as WebSocket from 'ws';
import * as express from 'express';
import { createServer } from 'http';
import Node from './node';
import Feed from './feed';
import Aggregator from './aggregator';
import { map, join } from './shared';
const aggregator = new Aggregator;
const app = express();
const server = createServer(app);
// WebSocket for Nodes feeding telemetry data to the server
const incomingTelemetry = new WebSocket.Server({ port: 1024 });
// WebSocket for web clients listening to the telemetry data aggregate
const telemetryFeed = new WebSocket.Server({ server });
app.get('/', function (req, res) {
function nodeInfo(node: Node) {
return `${node.name} | ${node.height} | Block time ${node.blockTime / 1000}s`;
}
res.send(
`<pre>
Best block: ${aggregator.height}
Node list:
${ join(map(aggregator.nodeList(), nodeInfo), '\n') }
</pre>`
);
});
incomingTelemetry.on('connection', async (socket: WebSocket) => {
try {
aggregator.addNode(await Node.fromSocket(socket));
} catch (err) {
console.error(err);
}
});
telemetryFeed.on('connection', (socket: WebSocket) => {
aggregator.addFeed(new Feed(socket));
});
server.listen(8080);
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import { Data } from 'ws';
import { Maybe, Opaque } from './shared';
export function parseMessage(data: Data): Maybe<Message> {
try {
const message = JSON.parse(data.toString());
if (message && typeof message.msg === 'string' && typeof message.ts === 'string') {
message.ts = new Date(message.ts);
return message;
}
} catch (_) {
console.warn('Error parsing message JSON');
}
return null;
}
export function getBestBlock(message: Message): Maybe<BestBlock> {
switch (message.msg) {
case 'node.start':
case 'system.interval':
case 'block.import':
return message;
default:
return null;
}
}
interface MessageBase {
ts: Date,
level: 'INFO' | 'WARN',
}
export interface BestBlock {
best: string,
height: number,
ts: Date,
}
interface SystemConnected {
msg: 'system.connected',
name: string,
chain: string,
config: string,
implementation: string,
version: string,
}
interface SystemInterval extends BestBlock {
msg: 'system.interval',
txcount: number,
peers: number,
status: 'Idle' | string, // TODO: 'Idle' | ...?
}
interface NodeStart extends BestBlock {
msg: 'node.start',
}
interface BlockImport extends BestBlock {
msg: 'block.import',
}
// Union type
export type Message = MessageBase & (
SystemConnected |
SystemInterval |
NodeStart |
BlockImport
);
// received: {"msg":"block.import","level":"INFO","ts":"2018-06-18T17:30:35.285406538+02:00","best":"3d4fdc7960078ddc9be87dddc48324a6d64afdf1f65fffe89529ce9965cd5f29","height":526}
// received: {"msg":"node.start","level":"INFO","ts":"2018-06-18T17:30:40.038731057+02:00","best":"3d4fdc7960078ddc9be87dddc48324a6d64afdf1f65fffe89529ce9965cd5f29","height":526}
// received: {"msg":"system.connected","level":"INFO","ts":"2018-06-18T17:30:40.038975471+02:00","chain":"dev","config":"","version":"0.2.0","implementation":"parity-polkadot","name":"Majestic Widget"}
// received: {"msg":"system.interval","level":"INFO","ts":"2018-06-19T14:00:05.091355364+02:00","txcount":0,"best":"360c9563857308703398f637932b7ffe884e5c7b09692600ff09a4d753c9d948","height":7559,"peers":0,"status":"Idle"}
-179
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import * as WebSocket from 'ws';
import * as EventEmitter from 'events';
import { Maybe, Id, idGenerator } from './shared';
import { parseMessage, getBestBlock, Message, BestBlock } from './message';
const BLOCK_TIME_HISTORY = 10;
const TIMEOUT = 1000 * 60 * 5; // 5 seconds
const nextId = idGenerator<Node>();
export interface NodeInfo {
name: string;
}
export interface BlockInfo {
height: number;
blockTime: number;
}
export default class Node extends EventEmitter {
public lastMessage: number;
public id: Id<Node>;
public name: string;
public implementation: string;
public version: string;
public height: number = 0;
public config: string;
public latency: number = 0;
public blockTime: number = 0;
private socket: WebSocket;
private blockTimes: Array<number> = new Array(BLOCK_TIME_HISTORY);
private lastBlockAt: Maybe<Date> = null;
constructor(socket: WebSocket, name: string, config: string, implentation: string, version: string) {
super();
this.lastMessage = Date.now();
this.id = nextId();
this.socket = socket;
this.name = name;
this.config = config;
this.implementation = implentation;
this.version = version;
console.log(`Listening to a new node: ${name}`);
socket.on('message', (data) => {
const message = parseMessage(data);
if (!message) return;
this.lastMessage = Date.now();
this.updateLatency(message.ts);
const update = getBestBlock(message);
if (update) {
this.updateBestBlock(update);
}
});
socket.on('close', () => {
console.log(`${this.name} has disconnected`);
this.disconnect();
});
socket.on('error', (error) => {
console.error(`${this.name} has errored`, error);
this.disconnect();
});
}
public static fromSocket(socket: WebSocket): Promise<Node> {
return new Promise((resolve, reject) => {
function cleanup() {
clearTimeout(timeout);
socket.removeAllListeners('message');
}
function handler(data: WebSocket.Data) {
const message = parseMessage(data);
if (message && message.msg === "system.connected") {
cleanup();
const { name, config, implementation, version } = message;
resolve(new Node(socket, name, config, implementation, version));
}
}
socket.on('message', handler);
const timeout = setTimeout(() => {
cleanup();
socket.close();
return reject(new Error('Timeout on waiting for system.connected message'));
}, 5000);
});
}
public timeoutCheck(now: number) {
if (this.lastMessage + TIMEOUT < now) {
this.disconnect();
}
}
public nodeInfo(): NodeInfo {
return {
name: this.name,
};
}
public blockInfo(): BlockInfo {
return {
height: this.height,
blockTime: this.blockTime,
};
}
public get average(): number {
let accounted = 0;
let sum = 0;
for (const time of this.blockTimes) {
if (time) {
accounted += 1;
sum += time;
}
}
if (accounted === 0) {
return 0;
}
return sum / accounted;
}
private disconnect() {
this.socket.removeAllListeners();
this.socket.close();
this.emit('disconnect');
}
private updateLatency(time: Date) {
this.latency = this.lastMessage - +time;
}
private updateBestBlock(update: BestBlock) {
const { height, ts: time, best } = update;
if (this.height < height) {
const blockTime = this.getBlockTime(time);
this.height = height;
this.lastBlockAt = time;
this.blockTimes[height % BLOCK_TIME_HISTORY] = blockTime;
this.blockTime = blockTime;
this.emit('block');
}
}
private getBlockTime(time: Date): number {
if (!this.lastBlockAt) {
return 0;
}
return +time - +this.lastBlockAt;
}
}
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../../shared
-26
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@@ -1,26 +0,0 @@
{
"compilerOptions": {
"target": "es2017",
"module": "commonjs",
"outDir": "build",
"strictNullChecks": true,
"sourceMap": true,
"moduleResolution": "node",
"noEmitOnError": false,
// "noUnusedLocals": true,
// "noUnusedParameters": true,
"pretty": true,
"noErrorTruncation": true,
"noImplicitAny": true
},
"files": [
"./node_modules/@types/node/index.d.ts",
"./node_modules/@types/ws/index.d.ts"
],
"include": [
"src/**/*.ts"
],
"exclude": [
"node_modules"
]
}