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.protocol;
  
  import com.fasterxml.jackson.annotation.JsonCreator;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.google.common.base.Objects;
  
  import javax.validation.constraints.Min;
  
  /**
   * Raft RequestVote message.
   */
  public final class RequestVote extends RaftRPC {
  
      private static final String LAST_LOG_INDEX = "lastLogIndex";
      private static final String LAST_LOG_TERM = "lastLogTerm";
  
      @Min(value = 0)
      @JsonProperty(LAST_LOG_INDEX)
      private final long lastLogIndex;
  
      @Min(value = 0)
      @JsonProperty(LAST_LOG_TERM)
      private final long lastLogTerm;
  
      /**
       * Constructor.
       *
       * @param source unique id of the Raft server that generated the message
       * @param destination unique id of the Raft server that is the intended recipient
       * @param term election term in which the message was generated
       * @param lastLogIndex index of the last {@code LogEntry} in the {@code source} server's Raft log
       * @param lastLogTerm election term in which the {@code LogEntry} at {@code lastLogIndex} was created
       *
       * @see io.libraft.algorithm.LogEntry
       */
      @JsonCreator
      public RequestVote(@JsonProperty(SOURCE) String source,
                         @JsonProperty(DESTINATION) String destination,
                         @JsonProperty(TERM) long term,
                         @JsonProperty(LAST_LOG_INDEX) long lastLogIndex,
                         @JsonProperty(LAST_LOG_TERM) long lastLogTerm) {
          super(source, destination, term);
          this.lastLogIndex = lastLogIndex;
          this.lastLogTerm = lastLogTerm;
      }
  
      /**
       * Get the last log index.
       *
       * @return index of the last {@link io.libraft.algorithm.LogEntry}
       *         in the {@code source} server's Raft log
       */
      public long getLastLogIndex() {
          return lastLogIndex;
      }
  
      /**
       * Get the last log term.
       *
       * @return election term in which the {@link io.libraft.algorithm.LogEntry}
       *         at {@link RequestVote#getLastLogIndex()} was created
       */
      public long getLastLogTerm() {
          return lastLogTerm;
      }
  
      @Override
      public int hashCode() {
          return Objects.hashCode(getSource(), getDestination(), getTerm(), lastLogIndex, lastLogTerm);
      }
  
      @Override
      public boolean equals(Object o) {
          if (o == null || !(o instanceof RequestVote)) {
              return false;
          }
          if (o == this) {
              return true;
          }
  
          RequestVote other = (RequestVote) o;
          return getSource().equalsIgnoreCase(other.getSource())
                  && getDestination().equalsIgnoreCase(other.getDestination())
                  && getTerm() == other.getTerm()
                  && lastLogIndex == other.lastLogIndex
                  && lastLogTerm == other.lastLogTerm;
      }
  
      @Override
      public String toString() {
          return Objects
                  .toStringHelper(this)
                  .add(SOURCE, getSource())
                  .add(DESTINATION, getDestination())
                  .add(TERM, getTerm())
                  .add(LAST_LOG_INDEX, lastLogIndex)
                  .add(LAST_LOG_TERM, lastLogTerm)
                  .toString();
      }
  }
  