This method level annotation can be used to decorate a Java method that wishes to be called when a web socket session is closing.

The method may only take the following parameters:-

• optional Session parameter
• optional CloseReason parameter
• Zero to n String parameters annotated with the jakarta.websocket.server.PathParam annotation.

The parameters may appear in any order. See Endpoint#onClose for more details on how the session parameter may be used during method calls annotated with this annotation.