umami/lib/kafka.ts
Brian Cao 9979672de5
Feat/um 202 event data new (#1841)
* Add event_data base.

* Add url_path.

* Add eventData back.

* Finish event_data relational.

* resolve comments.
2023-03-23 14:01:15 -07:00

119 lines
2.5 KiB
TypeScript

import dateFormat from 'dateformat';
import debug from 'debug';
import { Kafka, Mechanism, Producer, RecordMetadata, SASLOptions, logLevel } from 'kafkajs';
import { KAFKA, KAFKA_PRODUCER } from 'lib/db';
import * as tls from 'tls';
const log = debug('umami:kafka');
let kafka: Kafka;
let producer: 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: { ssl?: tls.ConnectionOptions | boolean; sasl?: SASLOptions | Mechanism } =
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: Kafka = 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(): Promise<Producer> {
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): string {
return dateFormat(date, 'UTC:yyyy-mm-dd HH:MM:ss');
}
async function sendMessage(
message: { [key: string]: string | number },
topic: string,
): Promise<RecordMetadata[]> {
await connect();
return producer.send({
topic,
messages: [
{
value: JSON.stringify(message),
},
],
acks: -1,
});
}
async function sendMessages(messages: { [key: string]: string | number }[], topic: string) {
await connect();
await producer.send({
topic,
messages: messages.map(a => {
return { value: JSON.stringify(a) };
}),
acks: 1,
});
}
async function connect(): Promise<Kafka> {
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,
sendMessages,
};