redis-scripto2

node-redis-scripto2
===================

This is a fork of redis-scripto with updated dependencies for modern Node.js. The API is identical, so if you currently use redis-scripto, you can migrate to redis-scripto2 without making any changes in your code except for the package name.


$3

* Lua Scripting on Redis (2.6+) is a killer feature
* But using them with NodeJs is painful
* We've to maintain lua script in JavaScript as string or load them via the filesystem manually
* If we are looking at network performance, we've to manually invoke script load and evasha manually

Scripto manages lua scripts for you

* You can place lua script in a directory
* Just tell the dirname to scripto, it will take care of lua scripts

~~~js
var Scripto = require('redis-scripto2');
var scriptManager = new Scripto(redisClient);
scriptManager.loadFromDir('/path/to/lua/scripts');

var keys = ['keyOne', 'keyTwo'];
var values = [10, 20];
scriptManager.run('your-script', keys, values, function(err, result) {

});
~~~

Scripto is intelligent

* By default scripto tries to load scripts into redis (via script load)
* While scripts are loading, if a script invoked with .run() it will use eval and send the plaintext lua script to redis
* After scripts loaded, if a script invoked with .run() it will use evalsha and does not send plaintext lua script
* If the connection to redis dropped, it will remove shas and try again to load scripts once it back online

You've the control with Scripto

* if you need to send the plaintext lua script always. use .eval() method

~~~js
scriptManager.eval('your-script', keys, values, function(err, result) {

});
~~~

* If you just need to load a single script, see following example

~~~js
var scriptManager = new Scripto(redisClient);
scriptManager.loadFromFile('script-one', '/path/to/the/file');
scriptManager.run('script-one', [], [], function(err, result) {

});
~~~

* If you need to load scripts just using JavaScript (without loading from the filesystem), see following example.

~~~js
var scripts = {
'script-one': 'return 1000'
};

var scriptManager = new Scripto(redisClient);
scriptManager.load(scripts);
scriptManager.run('script-one', [], [], function(err, result) {

});
~~~