How to push data from server to all clients not using Collections?

Question

I need to inform clients about changes on server side. In my case I am using different Collections on server and on client (more about it in this question: how would you build p

Answer 1

I must say the above solution showed me one way, but still, what if I need to publish to client data that are not connected with observe()? Or with any collection?

In my case I have i.e. 1000 products. To engage visitors I am "refreshig" the collection by updating the timestamp of random number of products, and displaying collection sorted by timestamp. Thank to this visitors have impression that something is happening.

My refresh method returns number of products (it is random). I need to pass that number to all clients. I did it, but using (I think) ugly workaround.

My refresh method sets Session.set('lastRandomNo', random). BTW: I didn't know that Session works on server side. refresh updates Products collection.

Then accoriding to above answer:

Meteor.publish 'refreshedProducts', ->

self = this
uuid = Meteor.uuid()

# create a new collection to pass ProductsMeta data
self.set('products_meta', uuid, { refreshedNo: 0 })

handle = Products.find().observe
  changed: (newDocument, atIndex, oldDocument) ->
    self.set('products_meta', uuid, { refreshedNo: Session.get('lastRandomNo') })
    self.flush()

self.complete()
self.flush()
self.onStop ->
  handle.stop()

and on client side:

ProductsMeta = new Meteor.Collection('products_meta')

# subscribe to server 'products_meta' collection that is generated by server
Meteor.subscribe('refreshedProducts')

ProductsMeta.find({}).observe
  changed: (newDocument, atIndex, oldDocument) ->

    # I have access to refreshedNo by
    console.log ProductsMeta.findOne().refreshedNo

What do you think?