Summary

Attempt to write a module that wraps Redis Pub/Sub around socket.io to emit messages to more than one node.js instance

Installation

Through npm:

npm install red-socket

Through github:

git clone [email protected]:JeromeParadis/red-socket.git

Usage

See Chat Example

var io = require('socket.io').listen(80),
    RedSocket = require('red-socket');

var rsr = RedSocket(io,options);

Then, you can use:

rsr.on("connection")

instead of

io.sockets.on("connection")

to wrap your socket code. Then, to wrap calls through pub-sub and dispatch to all sockets, you can use:

socket.r_broadcast_emit()
rsr.r_emit()

instead of

socket.r_broadcast_emit()
socket.emit()

Redis sets helper:

As a convenience, red-socket defines an helper to manage redis sets. Can be useful to use as a datastore instead of using a local array that wouldn't be shared between instances.

All methods can support a facultative callback with a boolean parameter that returns success or failure except for get_members that returns an array of the set members.

var nicknames = new rsr.Sets("nicknames");

gives you:

nicknames.add(value,unique,callback)   // Add a value to the set

unique is a boolean

nickname.delete(value,callback)        // Delete a value from the set
nickname.delete_set()                  // Destroy the set
nickname.get_members(callback)

Options

TODO:

• Redis Sets store: add volatility and/or keep track per process and delete on process lost
• ... maybe some kind of process ping to keep sets active?
• Add haproxy chat example to show multiple process running
• Add tests
• Add benchmarks
• Documentation
• Clean up code using async

Disclaimer

• Use at your own risk

MIT License

Copyright (c) 2011 Jerome Paradis

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.