Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | 6x 6x 6x 23x 23x 8x 8x 47x 26x 12x 6x 7x 8x 2x 6x 6x 6x 8x 8x 8x 8x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 3x 3x 3x 3x 2x 6x 6x 6x 6x 6x 2x 2x 2x 2x 2x 3x 3x 5x 8x 8x 8x 8x 3x 3x 3x 2x 2x 2x 2x | import Debug from 'debug';
import {Message} from 'zeromq';
import {Delta} from "./delta";
import {RhizomeNode} from "./node";
import {Subscription} from './pub-sub';
import {PeerRequest, RequestSocket, ResponseSocket} from "./request-reply";
const debug = Debug('rz:peers');
export class PeerAddress {
addr: string;
port: number;
constructor(addr: string, port: number) {
this.addr = addr;
this.port = port;
}
static fromString(addrString: string): PeerAddress {
const [addr, port] = addrString.trim().split(':');
return new PeerAddress(addr, parseInt(port));
}
toAddrString() {
return `${this.addr}:${this.port}`;
}
toJSON() {
return this.toAddrString();
}
isEqual(other: PeerAddress) {
return this.addr === other.addr && this.port === other.port;
}
};
export function parseAddressList(input: string): PeerAddress[] {
return input.split(',')
.filter(x => !!x)
.map((peer: string) => PeerAddress.fromString(peer));
}
export enum RequestMethods {
GetPublishAddress,
AskForDeltas
}
class Peer {
rhizomeNode: RhizomeNode;
reqAddr: PeerAddress;
reqSock?: RequestSocket;
publishAddr: PeerAddress | undefined;
isSelf: boolean;
isSeedPeer: boolean;
subscription?: Subscription;
constructor(rhizomeNode: RhizomeNode, reqAddr: PeerAddress) {
this.rhizomeNode = rhizomeNode;
this.reqAddr = reqAddr;
this.isSelf = reqAddr.isEqual(this.rhizomeNode.myRequestAddr);
this.isSeedPeer = this.rhizomeNode.config.seedPeers.some((seedPeer) => reqAddr.isEqual(seedPeer));
}
async request(method: RequestMethods): Promise<Message> {
if (!this.reqSock) {
this.reqSock = this.rhizomeNode.requestReply.createRequestSocket(this.reqAddr);
}
return this.reqSock.request(method);
}
async subscribeDeltas() {
if (!this.publishAddr) {
debug(`[${this.rhizomeNode.config.peerId}]`,
`Requesting publish addr from peer ${this.reqAddr.toAddrString()}`);
const res = await this.request(RequestMethods.GetPublishAddress);
this.publishAddr = PeerAddress.fromString(res.toString());
debug(`[${this.rhizomeNode.config.peerId}]`,
`Received publish addr ${this.publishAddr.toAddrString()} from peer ${this.reqAddr.toAddrString()}`);
}
debug(`[${this.rhizomeNode.config.peerId}]`, `Subscribing to peer ${this.reqAddr.toAddrString()}`);
// ZeroMQ subscription
this.subscription = this.rhizomeNode.pubSub.subscribe(
this.publishAddr,
"deltas",
(sender, msg) => {
const delta = this.rhizomeNode.deltaStream.deserializeDelta(msg);
delta.receivedFrom = sender;
debug(`[${this.rhizomeNode.config.peerId}]`, `Received delta: ${JSON.stringify(delta)}`);
this.rhizomeNode.deltaStream.ingestDelta(delta);
});
this.subscription.start();
}
async askForDeltas(): Promise<Delta[]> {
// TODO as a first approximation we are trying to cram the entire history
// of accepted deltas, into one (potentially gargantuan) json message.
// A second approximation would be to stream the deltas.
// Third pass should find a way to reduce the number of deltas transmitted.
// TODO: requestTimeout
const res = await this.request(RequestMethods.AskForDeltas);
const deltas = JSON.parse(res.toString());
return deltas;
}
}
export class Peers {
rhizomeNode: RhizomeNode;
peers: Peer[] = [];
constructor(rhizomeNode: RhizomeNode) {
this.rhizomeNode = rhizomeNode;
// Add self to the list of peers, but don't connect
this.addPeer(this.rhizomeNode.myRequestAddr);
this.rhizomeNode.requestReply.registerRequestHandler(async (req: PeerRequest, res: ResponseSocket) => {
debug(`[${this.rhizomeNode.config.peerId}]`, 'Inspecting peer request');
switch (req.method) {
case RequestMethods.GetPublishAddress: {
debug(`[${this.rhizomeNode.config.peerId}]`, 'It\'s a request for our publish address');
await res.send(this.rhizomeNode.myPublishAddr.toAddrString());
break;
}
case RequestMethods.AskForDeltas: {
debug(`[${this.rhizomeNode.config.peerId}]`, 'It\'s a request for deltas');
// TODO: stream these rather than
// trying to write them all in one message
const deltas = this.rhizomeNode.deltaStream.deltasAccepted;
debug(`[${this.rhizomeNode.config.peerId}]`, `Sending ${deltas.length} deltas`);
await res.send(JSON.stringify(deltas));
break;
}
}
});
}
stop() {
debug(`[${this.rhizomeNode.config.peerId}]`, 'Closing all peer request sockets');
for (const peer of this.peers) {
peer.reqSock?.close();
}
}
addPeer(addr: PeerAddress): Peer {
const peer = new Peer(this.rhizomeNode, addr);
this.peers.push(peer);
debug(`[${this.rhizomeNode.config.peerId}]`, 'Added peer', addr);
return peer;
}
async subscribeToSeeds() {
const {seedPeers} = this.rhizomeNode.config;
debug(`[${this.rhizomeNode.config.peerId}]`, `SubscribeToSeeds, seedPeers: ${JSON.stringify(seedPeers)}`);
seedPeers.forEach(async (addr, idx) => {
const peer = this.addPeer(addr);
debug(`[${this.rhizomeNode.config.peerId}]`, `SEED PEERS[${idx}]=${addr.toAddrString()}, isSelf:`, peer.isSelf);
if (!peer.isSelf) {
await peer.subscribeDeltas();
}
});
}
//! TODO Expect abysmal scaling properties with this function
async askAllPeersForDeltas() {
this.peers
.forEach(async (peer, idx) => {
debug(`[${this.rhizomeNode.config.peerId}]`, `Peer ${peer.reqAddr.toAddrString()} isSelf`, peer.isSelf);
Iif (peer.isSelf) return;
debug(`[${this.rhizomeNode.config.peerId}]`, `Asking peer ${idx} for deltas`);
const deltas = await peer.askForDeltas();
debug(`[${this.rhizomeNode.config.peerId}]`, `Received ${deltas.length} deltas from ${peer.reqAddr.toAddrString()}`);
for (const delta of deltas) {
delta.receivedFrom = peer.reqAddr;
this.rhizomeNode.deltaStream.receiveDelta(delta);
}
this.rhizomeNode.deltaStream.ingestAll();
});
}
}
|