33 lines
609 B
JavaScript
33 lines
609 B
JavaScript
const db = require("./cache");
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/**
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* A persistent cache for JSON values, using Redis.
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*/
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function createCache(keyPrefix) {
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function createKey(key) {
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return keyPrefix + "-" + key;
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}
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function set(key, value, expiry, callback) {
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db.setex(createKey(key), expiry, JSON.stringify(value), callback);
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}
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function get(key, callback) {
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db.get(createKey(key), (error, value) => {
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callback(error, value && JSON.parse(value));
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});
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}
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function del(key, callback) {
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db.del(createKey(key), callback);
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}
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return {
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set,
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get,
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del
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};
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}
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module.exports = createCache;
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