001/*
002 * SonarQube, open source software quality management tool.
003 * Copyright (C) 2008-2014 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * SonarQube is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * SonarQube is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019 */
020package org.sonar.process;
021
022public class Lifecycle {
023
024  public static enum State {
025    INIT, STARTING, STARTED, STOPPING, STOPPED
026  }
027
028  private State state = State.INIT;
029
030  public State getState() {
031    return state;
032  }
033
034  public synchronized boolean tryToMoveTo(State to) {
035    if (state.ordinal() < to.ordinal()) {
036      state = to;
037      return true;
038    }
039    return false;
040  }
041
042  @Override
043  public boolean equals(Object o) {
044    if (this == o) {
045      return true;
046    }
047    if (o == null || getClass() != o.getClass()) {
048      return false;
049    }
050    Lifecycle lifecycle = (Lifecycle) o;
051    return state == lifecycle.state;
052  }
053
054  @Override
055  public int hashCode() {
056    return state.hashCode();
057  }
058}