org.eclipse.jetty.npn

Interface NextProtoNego.ClientProvider

All Superinterfaces:

NextProtoNego.Provider

Enclosing class:

NextProtoNego

public static interface NextProtoNego.ClientProvider
extends NextProtoNego.Provider

The client-side provider interface that applications must implement to interact with the negotiation of the next protocol.

Method Summary

Modifier and Type	Method and Description
String	selectProtocol(List<String> protocols) Callback invoked to let the application select a protocol among the ones sent by the server.
boolean	supports() Callback invoked to let the implementation know whether an empty NPN extension should be added to a ClientHello SSL message.
void	unsupported() Callback invoked to let the application know that the server does not support NPN.

Method Detail

supports

boolean supports()

Callback invoked to let the implementation know whether an empty NPN extension should be added to a ClientHello SSL message.

Returns:

true to add the NPN extension, false otherwise

unsupported

void unsupported()

Callback invoked to let the application know that the server does not support NPN.

selectProtocol

String selectProtocol(List<String> protocols)

Callback invoked to let the application select a protocol among the ones sent by the server.

The implementation may return null to indicate to the server that it was not possible to negotiate a protocol.

The implementation may throw an exception to indicate that the TLS handshake must be aborted.

Parameters:

protocols - the protocols sent by the server

Returns:

the protocol selected by the application, or null to indicate to the server that it was not possible to negotiate a protocol