Creating a service queue - q request at a time

Hello Everybody.

First of all Happy New Year!

I have a service that could not have more than a 1 connection at a time.

I have a BIG-IP in front os this server.

My goal is to deal with one connection at a time, creating a queue.

This is the iRule I'm working on:

when RULE_INIT {
   set ::queue_index 0
   set ::queue_current_pos 1
   set ::queue_size 0
   set ::queue_size_max 500
}
when CLIENT_ACCEPTED {
   
    Queue Entrance
   incr ::queue_size
   log local0.info "Queue Size: $::queue_size"
   if {$::queue_index equals $::queue_size_max} {
      set ::queue_index 0
   }
   incr ::queue_index
   set my_index $::queue_index
   log local0.info "my Indice: $my_index"
   
    Colect Data
   TCP::collect
}
when CLIENT_DATA {      
      if { $my_index equals $::queue_current_pos }{
          If its my time
         TCP::release
         log local0.info "My time: $::queue_current_pos"
          Collect - CLIENT_DATA will run again (or not?)
         TCP::collect
      }
}
when CLIENT_CLOSED {
       Queue Exit
      incr ::queue_size -1
      if {$::queue_current_pos equals $::queue_size_max} {
         set ::queue_current_pos 0
      }
      incr ::queue_current_pos
      log local0.info "Exiting..."
      log local0.info "Current Pos: $::queue_current_pos"
      log local0.info "Current Index: $::queue_index"
      log local0.info "Queue size: $::queue_size"
}

Problem:

When I have 2 connections and the first one is doing his job, the second one is on "CLIENT_DATA" with no RELEASE (kind of a buffer and in a wait situation).

After the first one liberate the queue for the second connection, it will only work if the second connection send another string. (Otherwise it won't enter CLIENT_DATA again).

I've tried creating a timer to check if the queue is open on the second connection from time to time, but all TCL timers commands are disabled on iRule.

Can anyone help me?

Thanks!