public static class ClientEndpointConfig.Configurator
The Configurator class may be extended by developers who want to
provide custom configuration algorithms, such as intercepting the opening handshake, or
providing arbitrary methods and algorithms that can be accessed from each endpoint
instance configured with this configurator.
This method is called by the implementation after it has formulated the handshake
request that will be used to initiate the connection to the server, but before it has
sent any part of the request. This allows the developer to inspect and modify the
handshake request headers prior to the start of the handshake interaction.
headers - the mutable map of handshake request headers the implementation is about to send to
start the handshake interaction.
This method is called by the implementation after it has received a handshake response
from the server as a result of a handshake interaction it initiated. The developer may implement
this method in order to inspect the returning handshake response.