LRU cache built on top of React Native's AsyncStorage (or included MemoryStore) and automatic pruning of least recently used items.
You initialize a cache using the following.
var cache = new Cache({
namespace: 'myapp',
policy: {
maxEntries: 50000
},
backend: AsyncStorage
});
Multiple caches can be mantained in an application by instantiating caches with different namespaces.
cache.setItem('hello', 'world', function(err) {
// key 'hello' is 'world' in cache
});
cache.getItem('key1', function(err, value) {
console.log(value);
// 'hello'
});
Getting an item from the cache also moves it to the end of the LRU list: it will be evicted from the cache last.
cache.delItem('key1', function(err) {
// 'key1' is no more.
});
You can also peek at an item in the cache without updating its position in the LRU list:
cache.peekItem('key1', function(err, value) {
// 'world'
});
For more usage examples, see the tests.