content: /*
   * Copyright (c) 2013 - 2014, Allen A. George <allen dot george at gmail dot com>
   *
   * 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 libraft 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 HOLDER 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
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package io.libraft.agent.configuration;
  
  import com.google.common.net.HostAndPort;
  
  import static com.google.common.base.Preconditions.checkState;
  
  /**
   * Provides static utility methods for converting string endpoints
   * (i.e. addresses of the form <em>"host:port"</em>) into a valid
   * {@link HostAndPort} instance that can be used
   * in a {@link io.libraft.agent.RaftMember}.
   */
  public abstract class Endpoints {
  
      private Endpoints() { } // private to prevent instantiation
  
      /**
       * Convert an address string of the form <em>"host:port"</em> into a {@link HostAndPort} instance.
       *
       * @param endpoint non-empty address string
       * @return a valid {@code HostAndPort} instance. Callers can use
       *         {@link com.google.common.net.HostAndPort#getHostText()} and
       *         {@link com.google.common.net.HostAndPort#getPort()} to get the
       *         host and port components of {@code endpoint}
       *
       * @throws IllegalStateException if {@code endpoint} cannot be parsed
       */
      public static HostAndPort getValidHostAndPortFromString(String endpoint) {
          HostAndPort hostAndPort = HostAndPort.fromString(endpoint);
  
          String host = hostAndPort.getHostText();
          checkState(host != null && !host.isEmpty(), "invalid host");
  
          int Port = hostAndPort.getPort();
          checkState(Port > 0, "invalid port");
  
          return hostAndPort;
      }
  }