source: branches/3.3-HiveMigration/sources/HeuristicLab.Hive/HeuristicLab.Hive.Client.Core/3.3/Heartbeat.cs @ 4171

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2008 Heuristic and Evolutionary Algorithms Laboratory (HEAL)
 *
 * This file is part of HeuristicLab.
 *
 * HeuristicLab is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * HeuristicLab is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HeuristicLab. If not, see <http://www.gnu.org/licenses/>.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Timers;
using HeuristicLab.Hive.Client.Common;
using HeuristicLab.Hive.Client.Communication;
using System.Diagnostics;
using HeuristicLab.Hive.Contracts.BusinessObjects;
using HeuristicLab.Hive.Contracts;
using HeuristicLab.Hive.Client.Core.ConfigurationManager;
using HeuristicLab.Hive.Client.Communication.ServerService;
using HeuristicLab.Tracing;
//using BO = HeuristicLab.Hive.Contracts.BusinessObjects;

namespace HeuristicLab.Hive.Client.Core {
  /// <summary>
  /// Heartbeat class. It sends every x ms a heartbeat to the server and receives a Message
  /// </summary>
  public class Heartbeat {

    private bool offline;

    public double Interval { get; set; }
    private Timer heartbeatTimer = null;

    private static object locker = new object();

    public Heartbeat() {
      Interval = 100;
    }

    public Heartbeat(double interval) {
      Interval = interval;
    }

    private WcfService wcfService;

    /// <summary>
    /// Starts the Heartbeat signal.
    /// </summary>
    public void StartHeartbeat() {
      heartbeatTimer = new System.Timers.Timer();
      heartbeatTimer.Interval = this.Interval;
      heartbeatTimer.AutoReset = true;
      heartbeatTimer.Elapsed += new ElapsedEventHandler(heartbeatTimer_Elapsed);
      wcfService = WcfService.Instance;
      wcfService.ProcessHeartBeatCompleted += new EventHandler<ProcessHeartBeatCompletedEventArgs>(wcfService_ProcessHeartBeatCompleted);
      heartbeatTimer.Start();
    }

    /// <summary>
    /// This Method is called every time the timer ticks
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    void heartbeatTimer_Elapsed(object sender, ElapsedEventArgs e) {
      lock (locker) {
        // check if cwfService is disconnected for any reason (should happen at first heartbeat)
        // [chn] TODO: Client should always send heartbeats. when calendar disallows he should tell the server he does not want to compute anything
        if (wcfService.ConnState == NetworkEnum.WcfConnState.Disconnected &&
          (!UptimeManager.Instance.CalendarAvailable || UptimeManager.Instance.IsOnline())) {
          wcfService.Connect();
        }
        if (wcfService.ConnState == NetworkEnum.WcfConnState.Connected) {
          wcfService.LoginSync(ConfigManager.Instance.GetClientInfo());
        }

        ClientDto info = ConfigManager.Instance.GetClientInfo();

        PerformanceCounter counter = new PerformanceCounter("Memory", "Available Bytes", true);
        int mb = (int)(counter.NextValue() / 1024 / 1024);

        HeartBeatData heartBeatData = new HeartBeatData {
          ClientId = info.Id,
          FreeCores = info.NrOfCores - ConfigManager.Instance.GetUsedCores(),
          FreeMemory = mb,
          JobProgress = ConfigManager.Instance.GetProgressOfAllJobs()
        };

        DateTime lastFullHour = DateTime.Parse(DateTime.Now.Hour.ToString() + ":00");
        TimeSpan span = DateTime.Now - lastFullHour;
        if (span.TotalSeconds < (Interval / 1000)) {
          if (UptimeManager.Instance.IsOnline() && UptimeManager.Instance.CalendarAvailable) {
            //That's quiet simple: Just reconnect and you're good for new jobs
            if (wcfService.ConnState != NetworkEnum.WcfConnState.Loggedin) {
              Logger.Info("Client goes online according to timetable");
              wcfService.Connect();
            }
          } else {
            //We have quit a lot of work to do here: snapshot all jobs, submit them back, then disconnect and then pray to god that nothing goes wrong
            MessageQueue.GetInstance().AddMessage(MessageContainer.MessageType.UptimeLimitDisconnect);
          }
        }
        if (wcfService.ConnState == NetworkEnum.WcfConnState.Failed) {
          wcfService.Connect();
        } else if (wcfService.ConnState == NetworkEnum.WcfConnState.Loggedin) {
          Logger.Debug("Sending Heartbeat: " + heartBeatData);
          wcfService.ProcessHeartBeatAsync(heartBeatData);
        }
      }
    }

    void wcfService_ProcessHeartBeatCompleted(object sender, ProcessHeartBeatCompletedEventArgs e) {
      Logger.Debug("Heartbeat received");
      e.Result.ActionRequest.ForEach(mc => MessageQueue.GetInstance().AddMessage(mc));
    }

    public void StopHeartBeat() {
      heartbeatTimer.Dispose();
    }
  }
}