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JDBC Driver for Google Cloud Spanner

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/*
 * Copyright 2015, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *    * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *
 *    * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package nl.topicus.jdbc.shaded.io.grpc.nl.topicus.jdbc.shaded.net.y;

/**
 * Utility class for determining support for Jetty TLS ALPN/NPN.
 */
final class JettyTlsUtil {
  private JettyTlsUtil() {
  }

  /**
   * Indicates whether or not the Jetty ALPN jar is installed in the boot classloader.
   */
  static boolean isJettyAlpnConfigured() {
    try {
      Class.forName("nl.topicus.jdbc.shaded.org.eclipse.jetty.alpn.ALPN", true, null);
      return true;
    } catch (ClassNotFoundException e) {
      return false;
    }
  }

  /**
   * Indicates whether or not the Jetty NPN jar is installed in the boot classloader.
   */
  static boolean isJettyNpnConfigured() {
    try {
      Class.forName("nl.topicus.jdbc.shaded.org.eclipse.jetty.npn.NextProtoNego", true, null);
      return true;
    } catch (ClassNotFoundException e) {
      return false;
    }
  }
}