http://www.jboss.org/undertow-parent/undertow-core: Undertow (JBoss by Red Hat) 
/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package io.undertow.protocols.alpn;

import javax.net.ssl.SSLEngine;


Interface that allows for ALPN providers to be dynamically selected.
THIS API IS TECH PREVIEW
It will not be finalised until JDK9 has been released and the JDK9 ALPN API is 100% confirmed

Author:Stuart Douglas
/**
 * Interface that allows for ALPN providers to be dynamically selected.
 *
 * THIS API IS TECH PREVIEW
 *
 * It will not be finalised until JDK9 has been released and the JDK9 ALPN API is 100% confirmed
 *
 * @author Stuart Douglas
 */
public interface ALPNProvider {

    boolean isEnabled(SSLEngine sslEngine);

    
Sets the SSL protocols, and potentially wraps the SSLEngine

Params:
  • engine – The original engine
  • protocols – The protocols
Returns:The new SSLEngine
/**
     * Sets the SSL protocols, and potentially wraps the SSLEngine
     * @param engine The original engine
     * @param protocols The protocols
     * @return The new SSLEngine
     */
    SSLEngine setProtocols(SSLEngine engine, String[] protocols);

    
Gets the selected ALPN protocol, of null if none was selected.

Params:
  • engine – The SSL Engine
Returns:The selected protocol
/**
     * Gets the selected ALPN protocol, of null if none was selected.
     *
     *
     * @param engine The SSL Engine
     * @return The selected protocol
     */
    String getSelectedProtocol(SSLEngine engine);

    
Returns:The priority of this provider, higher priority providers will be tried first
/**
     *
     * @return The priority of this provider, higher priority providers will be tried first
     */
    int getPriority();

}