Overview of HTTP function selectors

A function selector determines which operation to call on an export interface.

When the HTTP export receives a request message, it uses the function selector to determine the method name that it needs to invoke on the interface based on the HTTP request information.

For a function selector, you can use one of the IBM-supplied function selectors or use a custom function selector. In the second case, you would supply a Java™ implementation of the FunctionSelector interface.

The supplied HTTP function selectors are as follows:

• One function selector determines the function on the interface to call based on the value of a special HTTP header (TargetFunctionName) value from the request.
• The other function selector determines the function to call based on the context path of the URL address and the HTTP method used in the request.