A simple and fast memory cache for node.js with async api
npm install mcachemcache
=============
A simple and fast async memory cache for node.js
Call only one time set function for many simultaneous get requests.
It is designed for quick return of data from the memory - for get operations are performed minimal coding.
Api built in asynchronous design, with callbacks.
Install
=============
npm install mcache
Examples
=============
###Abstract example
var Mcache = require('mcache');
// ttl = 600 sec, gc_time = 60 sec
cache = new Mcache(60, 10, function(key, callback) {
// this code will be executed at most once every 600 seconds
var error = null;
var value = ...;
callback(error, value);
});
var id = ... ;
cache.get(id, function(err, data) {
console.log(err, data);
});
###Example with mysql
var Mcache = require('mcache');
// ttl = 60 sec, gc_time = 10 sec
cache = new Mcache(60, 10, function(key, callback) {
// this code will be executed at most once every 60 seconds
mysql.query('SELECT ... WHERE id=?', key, callback);
});
var id = ... ;
cache.get(id, function(err, data) {
console.log(err, data);
});
var Mcache = require('mcache');
// ttl = 100 ms, gc_time = 60 sec
cache = new Mcache('100 ms', 60, function(key, callback) {
if (Array.isArray(key) {
callback(null, [...]);
} else {
callback(null, data);
}
});
var id = ... ;
cache.get(id, function(err, data) {
console.log(err, data);
});
var ids = [...];
cache.get(ids, function(err, data) {
console.log(err, data); // data = {key1: data1, ...}
});
API
=============
* ttl - time to live for item, seconds
* gc_time - interval for clear expired items, seconds
Can be empty - you must call clearOld manually.
* setfunction(key, callback) - function, get the value by the key, must call callback(error, value)
* key - can be any value
* callback(error, value) - function