Implementing Firebase Queue for multiple Users

[himanshu kapoor]

I need to implement queues, to avoid duplicate invocation of the same request due to firebase sockets running on multiple instances.

I know how to use queues, it's just I need some help that where should I write/add task in queue it

I have multi-user App, all users have their nodes in firebase and each user can only access their child nodes data.

Where to add a task in queues? like if I am adding a task in queues inside child_added listener and two instances are working on the cloud means listener trigger 2 times and 2 task will be added in queues, How can it be solved?

DB structure looks like this:

App/

- UID1

  - websiteURL : example.com

    analytics:

  visits: 87687

      productPageVisits : 13070

      gender: M

  timeStamp : 1490293800000

  

- UID2

  - websiteURL : example2.com

    analytics:

  visits: 20020

      productPageVisits : 130120

  timeStamp : 1490293800000

UID1 is unique id of user 1 and can only access nodes below after authentication, same is UID2

Node Js code:

 ref.child('app').on('child_added', function(root) {

 

 // dynamically get UID from root and map listeners

var UID = root.key();

 ref.child('app').child(UID).on('child_added', function() {

 

   // bind child nodes with event listeners

   

 ref.child('app').child(UID).child('analytics').on('child_added', function(snap) {   

 

   // and so on bind other child nodes with all UIDs

    

   // get previous visit count using once, increment with 1 and update

// Currently :add task in analytics queue

 

 })

 ))

and how many workers should I provide to handle around 200K concurrent users(each user has their own users like UID1 website users)? and should create 1 big queue and inside it starting other small queues? or else

[Kato Richardson]

Hello Himanshu,

Check out firebase-queue. It solves this by using transactions to "claim" the queued events, so multiple workers can process items in parallel. Alternately, you can use Functions, which would trigger a worker for each add event.

☼, Kato

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Kato Richardson |

Developer Programs Eng |

kato...@google.com |

775-235-8398