55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
const memcached = require('memcached');
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const winston = require('winston');
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class MemcachedDocumentStore {
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// Create a new store with options
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constructor(options) {
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this.expire = options.expire;
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const host = options.host || '127.0.0.1';
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const port = options.port || 11211;
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const url = `${host}:${port}`;
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this.connect(url);
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}
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// Create a connection
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connect(url) {
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this.client = new memcached(url);
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winston.info(`connecting to memcached on ${url}`);
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this.client.on('failure', function(error) {
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winston.info('error connecting to memcached', {error});
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});
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}
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// Save file in a key
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set(key, data, callback, skipExpire) {
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this.client.set(key, data, skipExpire ? 0 : this.expire || 0, (error) => {
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callback(!error);
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});
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}
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// Get a file from a key
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get(key, callback, skipExpire) {
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this.client.get(key, (error, data) => {
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const value = error ? false : data;
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callback(value);
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// Update the key so that the expiration is pushed forward
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if (value && !skipExpire) {
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this.set(key, data, (updateSucceeded) => {
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if (!updateSucceeded) {
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winston.error('failed to update expiration on GET', {key});
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}
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}, skipExpire);
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}
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});
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}
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}
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module.exports = MemcachedDocumentStore;
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