Fast demands gives err 500

[Alexandre Machado]

A quick and dirty way to implement it would be:

- Create a unit where you have a shared (global) variable which holds a TCriticalSection (let's name it HandlersCS).
- Create a TCriticalSection in unit initialization. Destroy it in unit finalization.
- In your TContentHandler.Execute() method do this:

HandlersCS.Enter;
try
// Do your thing here
finally
HandlersCS.Leave;
end;

All your current logic should be between Enter..Leave above.

This will effectively serialize all calls using that content handler class