Arbotext Publishing Engine Programmer's Guide (《Arbortext Publishing Engine 程序员指南》) > 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