iceshrimp-161sh/packages/backend/src/queue/initialize.ts

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2021-05-08 11:56:21 +02:00
import * as Bull from 'bull';
import config from '@/config/index';
2021-05-08 11:56:21 +02:00
export function initialize<T>(name: string, limitPerSec = -1) {
return new Bull<T>(name, {
redis: {
port: config.redis.port,
host: config.redis.host,
password: config.redis.pass,
db: config.redis.db || 0,
},
prefix: config.redis.prefix ? `${config.redis.prefix}:queue` : 'queue',
limiter: limitPerSec > 0 ? {
max: limitPerSec,
duration: 1000
} : undefined,
settings: {
backoffStrategies: {
apBackoff
}
}
});
}
// ref. https://github.com/misskey-dev/misskey/pull/7635#issue-971097019
function apBackoff(attemptsMade: number, err: Error) {
const baseDelay = 60 * 1000; // 1min
const maxBackoff = 8 * 60 * 60 * 1000; // 8hours
let backoff = (Math.pow(2, attemptsMade) - 1) * baseDelay;
backoff = Math.min(backoff, maxBackoff);
backoff += Math.round(backoff * Math.random() * 0.2);
return backoff;
}