Receiving/Showing realtime data via rpc

[k4r1m]

Hi there,

i am working on an app which sends an rpc-request to a server. The requested value is printed out successfully. Now i don’t know how to realize the request so that if the value changes on the rpc-server, my meteor app shows the updated value. Any idea?

i am quite new to meteor and have no clue how to realize that. Some sort of realtime rpc stream or a loop?? any help is appreciated.

[robfallows]

Something along these lines?

How to get variable value from server to client?

So, I would do something like @cstrat suggests, like this (I don’t know the library you’re using - I assume temperature is updated automatically once initialised?): In a client/ folder TestData = new Mongo.Collection(null); // Put this on the client only // It will reactively update with a doc like {_id:‘abc123’, temp:23.5} Meteor.subscribe(‘test-docs’); // An arbitrary subscription name Then, on the server, you generate and publish data within a roll-your-own publication. Maybe something al…

[k4r1m]

well the RPC-request i am sending is going to an extern server (non-meteor)… My issue is that the rpc.request() function is only called once when the meteor server starts up. What i need is that the meteor-server keeps requesting the rpc-data… because once the data on the rpc-server changes after my meteor-startup, my meteor application is not aware of the data-update (unless i manually initiate a new rpc-request)… but i want this to happen automatically…

[robfallows]

Something along these lines?

Best Way to handle a 3rd Party endpoint

This is relatively straightforward. You set up a client-only collection and a subscription in the usual way. RestData = new Mongo.Collection('rest-data'); // client only Meteor.subscribe('rest-docs'); On the server, you poll the REST endpoint at a suitable interval within a roll-your-own publication. Something along the lines of: Meteor.publish('rest-docs', function() { var init = true; var self = this; Meteor.setInterval(function() { var data = HTTP.get('some url').data; // for J…

[davethe0nly]

The only way to make this work is long polling, set a 10 second interval which will poll for the data. Afterwards you can use meteors low level publish apis to turn it in to a pub/sub model.

[k4r1m]

@robfallows - thanks rob, that did the trick.