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sync-disk-cache

v2.1.0

Published

sync disk cache

Downloads

3,327,597

Readme

sync-disk-cache Build status Build Status

A sync disk cache. inspired by jgable/cache-swap

An async sibling version is also available: stefanpenner/async-disk-cache

By default, this will usge TMPDIR/<username>/ for storage, but this can be changed by setting the $TMPDIR environment variable.

All stored values become strings.

Example

var Cache = require('sync-disk-cache');
var cache = new Cache('my-cache');
// 'my-cache' also serves as the global key for the cache.
// if you have multiple programs with this same `cache-key` they will share the
// same backing store. This by design.

// checking
cache.has('foo') === wasFooFound;

// retrieving (cache hit)
cache.get('foo') === {
  isCached: true,
  path: 'foo',
  content: 'content of foo'
}

// retrieving (cache miss)
cache.get('foo') === {
  isCached: false,
  path: 'foo',
  content: undefined
}

// retrieving (cache miss)
cache.set('foo', 'content of foo'); // was set

// remove a key
cache.remove('foo');

// clearing the cache
cache.clear(); // cache was cleared

Enable compression:

note: node 0.10.x does not support the synchronous zlib method variants, so compression is only available > 0.10.x

var Cache = require('sync-disk-cache');
var cache = new Cache('my-cache', {
  compression: 'gzip' | 'deflate' | 'deflateRaw' // basically just what nodes zlib's ships with
})

HELP!...my TMP dir is growing unbounded!

description

In general most OS distributions come with cron like tasks, which purge unused files in $TMPDIR. For example, ubuntu typically uses tmpreaper and macOS uses various tasks in /etc/periodic/*.

options

If your OS distribution does not provide such a cleanup mechanism:

a) We stronglly recommend utilizing one, as other sync-disk-cache is not alone in rely on this behavior b) If that is not possible, we recommend changing your $TMPDIR to something project specific and manually purging it.

License

Licensed under the MIT License, Copyright 2015 Stefan Penner