//
   //  ========================================================================
   //  Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.spdy.client;
  
  import java.util.List;
  import java.util.Map;
  import java.util.concurrent.Executor;
  import javax.net.ssl.SSLEngine;
  
  import org.eclipse.jetty.io.ClientConnectionFactory;
  import org.eclipse.jetty.io.EndPoint;
  import org.eclipse.jetty.io.NegotiatingClientConnection;
  import org.eclipse.jetty.npn.NextProtoNego;
  import org.eclipse.jetty.util.log.Log;
  import org.eclipse.jetty.util.log.Logger;
  
  public class NPNClientConnection extends NegotiatingClientConnection implements NextProtoNego.ClientProvider
  {
      private static final Logger LOG = Log.getLogger(NPNClientConnection.class);
  
      private final String protocol;
  
      public NPNClientConnection(EndPoint endPoint, Executor executor, ClientConnectionFactory connectionFactory, SSLEngine sslEngine, Map<String, Object> context, String protocol)
      {
          super(endPoint, executor, sslEngine, connectionFactory, context);
          this.protocol = protocol;
          NextProtoNego.put(sslEngine, this);
      }
  
      @Override
      public boolean supports()
      {
          return true;
      }
  
      @Override
      public void unsupported()
      {
          NextProtoNego.remove(getSSLEngine());
          completed();
      }
  
      @Override
      public String selectProtocol(List<String> protocols)
      {
          if (protocols.contains(protocol))
          {
              NextProtoNego.remove(getSSLEngine());
              completed();
              return protocol;
          }
          else
          {
              LOG.info("Could not negotiate protocol: server {} - client {}", protocols, protocol);
              close();
              return null;
          }
      }
  
      @Override
      public void close()
      {
          NextProtoNego.remove(getSSLEngine());
          super.close();
      }
  }