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client.ts
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client.ts
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import Container, { Service, Inject } from 'typedi';
import * as Redis from 'redis-fast-driver';
import { Configurer } from '@app/lib';
import { Logger, LogFactory } from '@app/log';
import { RedisConfig } from '@app/types';
type Handler = (msg: Array<string>) => void;
@Service()
export class RedisClient {
logFactory: LogFactory;
configurer: Configurer;
options: RedisConfig;
log: Logger;
client: Redis;
started: boolean = false;
constructor() {
const deps =
this.log = Container.get<LogFactory>(LogFactory).for(this)
this.options = Container.get<Configurer>(Configurer).get('redis');
const {host, port, db} = this.options;
this.log.info('Starting redis client. Server: %s:%s/%d', host, port, db);
this.client = new Redis(this.options);
//happen only once
this.client.on('ready', () => {
this.log.info('redis ready');
});
//happen each time when reconnected
this.client.on('connect', () => {
this.log.info('redis connected');
});
this.client.on('disconnect', () => {
this.log.info('redis disconnected');
});
this.client.on('reconnecting', (num: number) => {
this.log.info('redis reconnecting with attempt #' + num);
});
this.client.on('error', (e: Error) => {
this.log.info('redis error', e);
});
// called on an explicit end, or exhausted reconnections
this.client.on('end', () => {
this.log.info('redis closed');
});
}
on = (event: string, func: (...args: any[]) => void) => {
this.client.on(event, func);
}
publish(topic: string, raw: any): void {
this.client.rawCall(['publish', topic, raw], (error: Error, msg: any) => {
if (error) {
this.log.error('Redis publish error', error);
}
})
}
subscribe(channel: string, func: Function): void {
this.client.rawCall(['subscribe', channel], (error: Error, msg: Array<string>) => {
if (error) {
this.log.error('Redis error', error);
return;
}
func(msg);
})
}
}