node.js - Communication between Meteor and nodejs apps -

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i have meteor platform 4 node apps/servers inside. i'm using seamless iframes make whole package while stay in control, if 1 app goes wrong won't affect other 3 nor platform.

now, question is: how share same userid between apps? can query mongodb node asking userid, how can query asking same userid online user has in meteor? 1 login everything, that's need.

edit: faye or simplebus?


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