node-object-sync server example

node-object-sync-server-example.coffee

    ObjectSync = require 'object-sync'
    server = http.createServer()

    # Hook an ObjectSync instance up to our server.
    # Define a bunch of handlers for CRUD events. The handlers are
    # async because they'll likely interact with some kind of database
    sync = ObjectSync.listen server, 

      # a client wants to delete object with id id
      destroy: (id, client_sid, callback) ->
        console.log "client #{client_sid} has destroyed object #{id}"
        callback null # sends events to clients

      # a client wants to update an object
      update: (obj, client_sid, callback) ->
        # sends an error to the client requesting the update and no
        # message to all other clients
        callback
          code: 'invalid_id'

      # a client wants to create an object
      create: (obj, client_sid, callback) ->
        callback null, obj

      # a client requests a list of objects
      fetch: (ids, client_sid, callback) ->
        results = [] # ...
        callback null, results

    # The following functions let the server pro-actively change things
    sync.save obj, (err, obj) -> # ...
    sync.destroy obj, (err, obj) -> # ...
    sync.fetch ids, (err, objs) -> # ...
    sync.update obj, (err, obj) -> # ...