78 lines
1.6 KiB
JavaScript
78 lines
1.6 KiB
JavaScript
import redis from 'redis';
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import logger from '../../logger';
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const DEFAULT_REDIS_TTL = 30 * 1000; // 30 seconds
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function debug() {
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logger.debug.apply(logger, ['RedisCacheAdapter', ...arguments]);
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}
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export class RedisCacheAdapter {
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constructor(ctx) {
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this.client = redis.createClient(ctx);
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this.p = Promise.resolve();
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}
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get(key) {
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debug('get', key);
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this.p = this.p.then(() => {
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return new Promise((resolve, _) => {
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this.client.get(key, function(err, res) {
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debug('-> get', key, res);
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if(!res) {
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return resolve(null);
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}
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resolve(JSON.parse(res));
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});
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});
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});
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return this.p;
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}
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put(key, value, ttl) {
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value = JSON.stringify(value);
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debug('put', key, value, ttl);
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this.p = this.p.then(() => {
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return new Promise((resolve, _) => {
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if (ttl) {
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this.client.psetex(key, ttl, value, function(err, res) {
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resolve();
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});
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} else {
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this.client.set(key, value, function(err, res) {
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resolve();
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});
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}
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});
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});
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return this.p;
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}
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del(key) {
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debug('del', key);
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this.p = this.p.then(() => {
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return new Promise((resolve, _) => {
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this.client.del(key, function(err, res) {
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resolve();
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});
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});
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});
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return this.p;
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}
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clear() {
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debug('clear');
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this.p = this.p.then(() => {
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return new Promise((resolve, _) => {
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this.client.flushall(function(err, res) {
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resolve();
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});
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});
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});
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return this.p;
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}
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}
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export default RedisCacheAdapter;
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