sync-cache

Cache for synchronous modules e.g. using Fibers based on Isaac's AsyncCache. By default use lru-cache but can be passed any store that follows a simple api.

Usage

npm install sync-cache --save

var SyncCache = require('sync-cache');
var client = require('./my-sync-module');
var cache = new SyncCache({ max: 1000, maxAge: 1000*60*60, load: client.find });
 
// ...
 
var value = cache.get(params);
// Do something with value

Options

• load function to execute when no item is found in the cache
• max number of items to cache (passed to lru-cache or configured cache store), defaults Infinity
• maxAge maximum number of milliseconds to keep items, defaults null
• stale boolean to indicate if cache should return stale items (lru-cache),default false
• store cache store object, default lru-cache

API

get (key)

Returns an item from the cache. If the item is not found, call the load handler to retrieve the item and save the item in the cache.

set (key, value)

Save the value in the cache for key.

del (key)

Delete an item from the cache.

reset ()

Remove all items from the cache. Note support varies with underlying cache stores, e.g. not possible with sync-memcached-store.

has (key)

Check if a key exists without returning the value. Note support varies with underlying cache stores, e.g. it is the same as a get with sync-memcached-store.

peek (key)

Calls underlying cache store peek method. Note support varies with underlying cache stores, e.g. not possible with sync-memcached-store.

Cache stores

To create a new cache store for SyncCache, it must support the same API i.e. get, has, set, del, reset, has, peek.