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#!/usr/bin/node
/* jshint esnext:true */
/* download data from AWS and push into process queues */
"use strict";
const amqp = require("amqplib"),
Promise = require("bluebird"),
winston = require("winston"),
loggly = require("winston-loggly-bulk"),
request = require("request-promise"),
sleep = require("sleep-promise"),
jsonapi = require("../orm/jsonapi"),
moment = require("moment"),
AdmZip = require("adm-zip");
const RABBITMQ_URI = process.env.RABBITMQ_URI || "amqp://localhost",
QUEUE = process.env.QUEUE || "sample",
PROCESS_QUEUE = process.env.PROCESS_QUEUE || "process",
PROCESS_BRAWL_QUEUE = process.env.PROCESS_BRAWL_QUEUE || "process_brawl",
LOGGLY_TOKEN = process.env.LOGGLY_TOKEN,
SAMPLERS = parseInt(process.env.SAMPLERS) || 5;
const logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)({
timestamp: true,
colorize: true
})
]
});
// loggly integration
if (LOGGLY_TOKEN)
logger.add(winston.transports.Loggly, {
inputToken: LOGGLY_TOKEN,
subdomain: "kvahuja",
tags: ["backend", "sampler", QUEUE],
json: true
});
(async () => {
let rabbit, ch;
while (true) {
try {
rabbit = await amqp.connect(RABBITMQ_URI);
ch = await rabbit.createChannel();
await ch.assertQueue(QUEUE, {durable: true});
break;
} catch (err) {
logger.error("error connecting", err);
await sleep(5000);
}
}
await ch.prefetch(SAMPLERS);
ch.consume(QUEUE, async (msg) => {
const payload = JSON.parse(msg.content.toString());
if (msg.properties.type == "sample")
await getSample(payload);
if (msg.properties.type == "telemetry") {
try {
await getTelemetry(payload, msg.properties.headers.match_api_id);
} catch (err) {
logger.error("Telemetry download error", err);
ch.nack(msg, false, true); // TODO how to handle this?
}
}
logger.info("done", payload);
ch.ack(msg);
}, { noAck: false });
// download a sample ZIP and send to processor
async function getSample(url) {
logger.info("downloading sample", url);
const zipdata = await request({
uri: url,
encoding: null
}),
zip = new AdmZip(zipdata);
await Promise.map(zip.getEntries(), async (entry) => {
if (entry.isDirectory) return;
const match = jsonapi.parse(JSON.parse(entry.getData().toString("utf8")));
await sendMatchToProcessor(match);
});
logger.info("sample processed", url);
}
// send to seperated queues or just to `process`
async function sendMatchToProcessor(match) {
if (["casual", "ranked"].indexOf(match.attributes.gameMode) != -1)
await ch.sendToQueue(PROCESS_QUEUE, new Buffer(JSON.stringify(match)),
{ persistent: true, type: "match" })
else
await ch.sendToQueue(PROCESS_BRAWL_QUEUE, new Buffer(JSON.stringify(match)),
{ persistent: true, type: "match" })
}
// download Telemetry, filter irrelevant events, forward the rest to `process`
async function getTelemetry(url, match_api_id) {
logger.info("downloading Telemetry",
{ url: url, match_api_id: match_api_id });
// download
const telemetry = await loggedRequest(url),
spawn = telemetry.filter((ev) => ev.type == "PlayerFirstSpawn")[0];
// return telemetry { m_a_id, data, start, end } in an interval
const gamePhase = (start, end) => { return {
match_api_id: match_api_id,
data: telemetry.filter((ev) =>
moment(ev.time).isBetween(
moment(spawn.time).add(start, "seconds"),
moment(spawn.time).add(end, "seconds")
) ),
start: start,
end: end
} };
// split into phases
const phases = [
gamePhase(0, 1 * 60), // start
gamePhase(1 * 60, 4 * 60), // early game
gamePhase(4 * 60, 10 * 60), // mid game
gamePhase(10 * 60, 15 * 60), // mid game Gold miner
gamePhase(15 * 60, 20 * 60), // mid game Kraken
gamePhase(20 * 60, 25 * 60), // late game
gamePhase(25 * 60, 30 * 60), // late game
gamePhase(30 * 60, 90 * 60) // still playing?
];
await Promise.each(phases, async (phase) => {
if (phase.data.length > 0)
await ch.sendToQueue(PROCESS_QUEUE, new Buffer(
JSON.stringify(phase)),
{ persistent: true, type: "telemetry" })
});
logger.info("Telemetry done",
{ url: url, match_api_id: match_api_id });
}
async function loggedRequest(url) {
let response;
try {
const opts = {
json: true,
gzip: true,
time: true,
forever: true,
strictSSL: true,
resolveWithFullResponse: true
};
logger.info("AWS request", { uri: url, });
response = await request(url, opts);
return response.body;
} catch (err) {
logger.warn("AWS error", {
uri: url,
error: err.response.body
});
throw err;
} finally {
if (response != undefined) // else non-requests error
logger.info("AWS response", {
status: response.statusCode,
connection_start: response.timings.connect,
connection_end: response.timings.end
});
}
}
})();
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