@seneca/redis-cache NPM

seneca-redis-cache

Description

This module is a plugin for the Seneca framework. It provides a set of common caching actions (get, set etc.), backed by redis.

By moving cache operations into Seneca, you can change your cache implementation or business rules at a later point. For example, you might decide to send certain kinds of keys to a different cache mechanism, such as redis.

Seneca compatibility

Supports Seneca versions 1.x, 2.x and 3.x

Install

npm install seneca
npm install seneca-redis-cache

Quick example

This code snippet sets a value and then retrieves it.

var seneca = require('seneca')();
seneca.use('redis-cache');

seneca.ready(function(err) {
  seneca.act({role: 'cache', cmd: 'set', key: 'k1', val: 'v1'}, function(err) {
    seneca.act({role: 'cache', cmd: 'get', key: 'k1'}, function(err, out) {
      console.log('value = ' + out)
    });
  });
});

Options

expire : number 3600
redis.port : number 6379
redis.host : string "127.0.0.1"

Set plugin options when loading with:

seneca.use('redis-cache', { name: value, ... })

Note: foo.bar in the list above means { foo: { bar: ... } }

Action Patterns

Action Descriptions

« `init:redis-cache` »

No description provided.

« `role:cache,cmd:add` »

No description provided.

« `role:cache,cmd:clear` »

No description provided.

« `role:cache,cmd:decr` »

No description provided.

« `role:cache,cmd:delete` »

No description provided.

« `role:cache,cmd:get` »

No description provided.

« `role:cache,cmd:incr` »

No description provided.

« `role:cache,cmd:set` »

No description provided.

« `role:cache,get:native` »

No description provided.

Common Cache API

Seneca has a common caching API with the following actions:

role:cache, cmd:set store a value - key and val arguments required
role:cache, cmd:get retreive a value - key argument is required
role:cache, cmd:add store a value, only if the key does not exist - key and val arguments required
role:cache, cmd:delete delete a value - key argument is required, no error if key does not exist
role:cache, cmd:incr increment a value - key and val (integer) arguments required
role:cache, cmd:decr decrement a value - key and val (integer) arguments required

All caching plugins, including this one, implement this action API.

Extended API

To access the underlying redis, use the action plugin: 'redis-cache', cmd: 'native'.

The plugin also registers with the action role: 'seneca', cmd: 'close'. This sends the QUIT command to the redis connection when you call the seneca.close method.

Options

You can use any of the options from the node redis module directly as options to this plugin.

Contributing

The Senecajs org encourage open participation. If you feel you can help in any way, be it with documentation, examples, extra testing, or new features please get in touch.