Table of Contents

Espress.js

In Express.js you can use the standard memjs interface to get and set values as described in our Node.js documentation to cache expensive computations or database queries:

In addition there are two Express.js specific ways to use Memcache:

  1. Cache rendered views
  2. Store sessions

Cache rendered views

To cache rendered views it is best to create an Express.js middleware function as such:

If you use the cacheView middleware you need to take care to invalidate the cache whenever the view needs to be re-rendered, e.g., when the content changes. This can be done by deleting the cached item:

Storing Sessions in Memcache

Memcache works well for sessions that time out, however, since Memcache is a cache and thus not persistent, saving long-lived sessions in Memcache might not be ideal. For long-lived sessions consider a permanent storage option such as your database.

To use sessions in Express you need express-session and to store them in Memcache you need connect-memjs:

$ npm install express-session connect-memjs

Then you can configure sessions in your app: