Memory cache Node-RED nodes

Memcached-like memory cache Node-RED nodes. You can set/get values and provide them TTL if necessary.

There are 3 nodes in this project.

1. Cache configuration node ... Memory cache instance. Each configuration node is isolated from other Cache nodes. Default TTL is undefined (never expired). Default check period is undefined (never checked).
2. Cache in node ... Used for retrieving a stored value
3. Cache out node ... Used for storing a key-value pair. You can set TTL (in seconds) as well as key-value pair by providing TTL property.

The cache behavior is fully depending on node-cache library. But the project doesn't support full features of the library for making the nodes simpler.

Installation

cd ~/.node-red
npm install --production node-red-contrib-cache

Example flow

You can import an example from the menu (Import > Examples > cache > Cache Example) on the editor.

Revision History

• 2.0.2-2.0.3
  • Fix JSON format error
• 2.0.1
  • Revise Default TTL description on the node help content and README as the node immediately clears its cache content when Default TTL is 0
• 2.0.0
  • Add a new feature to route a message object to another port on a cache miss, disabled by default (#3)
  • Introduce a new property 'dump' to dump all entries in the cache (#4)
• 1.1.0
  • Fix #2
  • Move the example flow to Import menu
• 1.0.4
  • Fix labels
• 1.0.3
  • Emit null when the retrieved value is null, undefined or ''(empty string)
• 1.0.2
  • Remove redundant dependency
• 1.0.1
  • Fix an issue where the wrong TTL value can be used on storing a value when there’s no valid TTL property in the msg object
• 1.0.0
  • Initial release