Package org.eclipse.jetty.alpn

Interface ALPN.ClientProvider

All Superinterfaces:
ALPN.Provider
Enclosing class:
ALPN
public static interface ALPN.ClientProvider extends ALPN.Provider
The client-side provider interface that applications must implement to interact with the negotiation of the protocol.

  • Method Summary

    Modifier and Type
    Method
    Description
    List<String>
    protocols()
    Callback invoked to let the implementation know the list of protocols that should be added to the ALPN extension in a ClientHello TLS message.
    void
    selected(String protocol)
    Callback invoked to let the client application know the protocol chosen by the server.
    boolean
    supports()
    Callback invoked to let the implementation know whether an ALPN extension should be added to a ClientHello TLS message.
    void
    unsupported()
    Callback invoked to let the client application know that the server does not support ALPN.

  • Method Details

    • supports

      boolean supports()
      Callback invoked to let the implementation know whether an ALPN extension should be added to a ClientHello TLS message.
      Returns:
      true to add the ALPN extension, false otherwise

    • protocols

      List<String> protocols()
      Callback invoked to let the implementation know the list of protocols that should be added to the ALPN extension in a ClientHello TLS message.

      This callback is invoked only if the supports() returned true.

      Returns:
      the list of protocols supported by the client; if null or empty, the ALPN extension is not sent

    • unsupported

      void unsupported()
      Callback invoked to let the client application know that the server does not support ALPN.

    • selected

      void selected(String protocol)
      Callback invoked to let the client application know the protocol chosen by the server.
      Parameters:
      protocol - the protocol selected by the server