1 files changed, 90 insertions, 0 deletions
diff --git a/worker.js b/worker.js
new file mode 100644
index 0000000..c97b7c2
--- /dev/null
+++ b/worker.js
@@ -0,0 +1,90 @@
+#!/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"),
+    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);
+
+        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" })
+    }
+})();