querymemcache
querymemcache is a node.js module designed to allow you to cache the frequent queries to the DB with using of memcache. It can work with any SQL database.
Installation
Using npm:
$ npm install --save querymemcache
If you don't have or don't want to use npm:
$ cd ~/.node_modules
$ git clone git://github.com/bgrusnak/querymemcache.git
Usage
To require the library and initialize it
import QueryMemCache from 'querymemcache';
var cache=QueryMemCache({
lifetime: 300, // cache lifetime in seconds
servers: 'localhost:11211', // local server
options: {
maxKeySize: 2000 // the size of the key
}
})Methods
There only one method
process
Check and cache the results of queryFunction
.process({observe:observedFields, change:changedFields}, queryFunction, callbackFunction)
Parameters:
| Name | Description | Type | Required |
|---|---|---|---|
| observe | List of field names or arrays [field, operand, value] which needs to be observed | Array |
No |
| change | List of field names or arrays [field, operand, value] which will b changed | Array |
No |
| queryFunction | The function, which will called if no valid data is available | Function |
Yes |
| callbackFunction | The function, which will receive the result of the cache process | Function |
No |
Requirements
- node.js v7.10.0+ (7.10.0 is the version I used to develop this module. I'm unsure if it will work with previous ones. If you run a previous version, and it works, let me know and I'll update this)
- memcached 2.2.2+
Contributions
If you run into problems, have questions, or whatever else you can open an issue on this repository. If you'd like to submit a patch, shoot me a pull request. I'd like to keep this module simple, so if you want to add all kinds of crazy functionality - you might want to fork. When in doubt, send a pull request - the worst that can happen is that I won't merge it.
License
MIT © Ilya Shlyakhovoy