PTC Arbortext Publishing Engine Programmer's Guide (PTC Arbortext Publishing Engine 程式設計師指南) > The Arbortext Publishing Engine Request Manager > Customizing the Arbortext PE Request Manager > Writing a Custom Queue > Fundamental Queue Methods
  
Fundamental Queue Methods
Every queue object must implement the following methods, which support placing a transaction on a queue, removing a transaction after it finishes executing, and determining which transactions to execute next