Collection Locking

[tariqjawed83]

I have customers waiting to talk to CSRs, and each CSR will click on a button on UI to get the next customer (longest waiting). I want to avoid race condition here, means no two CSR should be assigned to same customer waiting their turn on the line.

I am thinking to use findAndModify of MongoDB, but will that solve the issue?

There is a collection “CustomerSessions”, in which a CSR will be assigned for each Customer.

[robfallows]

@tariqjawed83

I am thinking to use findAndModify of MongoDB, but will that solve the issue?

That sounds like an excellent way to do this.

Do your “find” on oldest, unassigned ticket, and your “modify” to assign. This command is atomic and will work even in multi-server Meteor applications.