umami/lib/kafka.js

102 lines
2.0 KiB
JavaScript

import { Kafka, logLevel } from 'kafkajs';
import dateFormat from 'dateformat';
import debug from 'debug';
import { KAFKA, KAFKA_PRODUCER } from 'lib/db';
const log = debug('umami:kafka');
let kafka;
let producer;
const enabled = Boolean(process.env.KAFKA_URL && process.env.KAFKA_BROKER);
function getClient() {
const { username, password } = new URL(process.env.KAFKA_URL);
const brokers = process.env.KAFKA_BROKER.split(',');
const ssl =
username && password
? {
ssl: {
checkServerIdentity: () => undefined,
ca: [process.env.CA_CERT],
key: process.env.CLIENT_KEY,
cert: process.env.CLIENT_CERT,
},
sasl: {
mechanism: 'plain',
username,
password,
},
}
: {};
const client = new Kafka({
clientId: 'umami',
brokers: brokers,
connectionTimeout: 3000,
logLevel: logLevel.ERROR,
...ssl,
});
if (process.env.NODE_ENV !== 'production') {
global[KAFKA] = client;
}
log('Kafka initialized');
return client;
}
async function getProducer() {
const producer = kafka.producer();
await producer.connect();
if (process.env.NODE_ENV !== 'production') {
global[KAFKA_PRODUCER] = producer;
}
log('Kafka producer initialized');
return producer;
}
function getDateFormat(date) {
return dateFormat(date, 'UTC:yyyy-mm-dd HH:MM:ss');
}
async function sendMessage(params, topic) {
await connect();
await producer.send({
topic,
messages: [
{
value: JSON.stringify(params),
},
],
acks: 1,
});
}
async function connect() {
if (!kafka) {
kafka = process.env.KAFKA_URL && process.env.KAFKA_BROKER && (global[KAFKA] || getClient());
if (kafka) {
producer = global[KAFKA_PRODUCER] || (await getProducer());
}
}
return kafka;
}
export default {
enabled,
client: kafka,
producer,
log,
connect,
getDateFormat,
sendMessage,
};