npm install tec
#tec: Time Eviction Cache#
_tec_ module is a time eviction cache with an integration via proxy injection that makes its work transparent. The usage is very simple, inject the cache into a target function and let _tec_ keep track of the returned values from the target function for you.
No more checking for cache hits and misses that pollutes your business logic. _tec_ handles it under the hood and retrieves the information again when internal values have been evicted. It works for both synchronous and asynchronous target functions.
``javascript
var tec = require('tec');
var mymodule = {
sum:function(x,y){
console.log("sum(" + x + "," + y + ")");
return x+y;
}
}
tec.cache(mymodule,"sum",1000);//1 second eviction
mymodule.sum(5,5);
mymodule.sum(5,5);
`
The first time that the _sum_ function is called _tec_ routes the call to the target function, holds the value returned in memory so the next calls are served from within _tec_ itself. After the timeout the value is evicted, so a future call will be rerouted again to the source. This feature can be very handy for asynchronous fetches to a database or remote system to lower down the number of requests.
Following this line you can find the an example with an asynchronous target function.
`javascript
var tec = require('tec');
var mymodule = {
sum:function(x,y){
setTimeout(function(){
cb(null, x+y);
},5000);
}
}
tec.cache(mymodule,"sum",1000);//1 second eviction
mymodule.sum(5,5,function(err,val){
//val served from source
mymodule.sum(5,5,function(err,val){
//val served from internal cache
});
});
``