Patterns for showing task progress bar as in Jenkins

I would like to know if anyone has some examples about how one could implement the display of task progression as it is done in Jenkins (the continious integration tool).

Below one possible use case:

• A user wants to upload a file to a remote server.
• But he can do it only if no one else is currently uploading some file to this same server.
• So the user can see the progression (and the end) of other's tasks before its own task gets processed by the application.

So my questions are:

• Do you know some programming patterns that suit this need?
• Do you have some examples?
  • Espacially with Angular 4 and/or Spring ?
• Should I consider implementing Server Push ?

Thanks in advance for your help, :)