GAE Microservices

[mukesh raj dass]

Hi

I am trying to develop an GAE with multiple modules each having distinct codes talking to Firebase.  A client might need an app with only 2 modules and other might need 5 modules...i was hoping to load them as services or microservices...problem is how to connect them together ?

It is like going to an accounting system and having a GL, Job Costing, Project costing as a separate module.  In the main entry point  (services: default) there will be a button to go to each services or modules  From what i understand in the documentation...each services (previously modules) cannot access to each of them unless via REST.

Any bright ideas how to do it in GAE using Firebase ?

Appreciate the input.

[Andrew Cooper]

Which documentation are you following? Are you thinking of using GAE Flex or GAE Standard?

I have added a couple of links that you might find interesting that details how requests are routed in GAE. Please note, this is for Python but the concept is the same for other languages.

• How Requests are Routed

• Communicating Between Your Services

• Serverless network endpoint groups overview

[mukesh raj dass]

Hi

Appreciate the feedback.

I am using Standard environment in Python 3.7.  I need to create a URL for services that can only be access from inside the application after login authentication.  The 

services will be modules that will available.  It cannot be accessed from outside the application.  Do i restrict access via app.yaml only to allow access from within the application into a module which will be a "service" .  How best to do it ?

Mukesh Raj

[wesley c]

Hi Mukesh, in addition to my colleague Andrew's recommendations, I'll add the following:

1. You inquired about microservices. We have a Python 2 App Engine microservices architecture document that should be interesting to you.
2. You could probably replicate a similar architecture on Python 3, however Python 3 on App Engine slightly different (no bundled services) so we didn't publish a similar page for 3.x. Another reason is that such an architecture on Python 3 may be better suited for its sister product, Google Cloud Functions. What you call "modules" can be implemented as individual functions.
3. If you're going to store data in Firebase, you might as well use Firebase Auth to authenticate your users. Learn about that and other auth options on App Engine from this page in the docs. (It's very likely the same technique can be used w/Cloud Functions as well).
4. Heads-up there's a "new" product that combines the Firebase RTDB + Google Cloud's NoSQL Cloud Datastore called Cloud Firestore that launched in 2017 as the next-gen successor to both. If you're considering one of them, here's the page in the docs helping you decide b/w Firebase & Firestore.

Good luck and let us know how it goes!

--Wesley

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