There is one more step needed (Step 5) to perform active monitoring of the realservers (thus keeping a dynamic list of which Apache nodes are eligible to service work request).
One way to achieve the above example is to display a drop-down with a list of all the eligible product codes and a description for the user to select, as shown in Figure 4.
实现上述示例的一种方法是提供一个带有所有有效产品代码及其说明的下拉列表供用户选择，如图 4 所示。
3
The ListCustomer stored procedure provides a list of eligible customers by customer name, customer number, and date of birth (see Figure 2).