source: branches/HeuristicLab.Hive-3.4/sources/HeuristicLab.Clients.Hive.Slave/3.4/SlaveCommunicationService.cs @ 5156

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2010 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.Collections.Generic;
using System.ServiceModel;
using HeuristicLab.Clients.Hive.Slave.ServiceContracts;

namespace HeuristicLab.Clients.Hive.Slave {

  public class SlaveCommunicationService : ISlaveCommunication {
    private static List<ISlaveCommunicationCallbacks> subscribers = new List<ISlaveCommunicationCallbacks>();

    public bool Subscribe() {
      try {
        ISlaveCommunicationCallbacks callback = OperationContext.Current.GetCallbackChannel<ISlaveCommunicationCallbacks>();
        if (!subscribers.Contains(callback))
          subscribers.Add(callback);
        return true;
      }
      catch {
        return false;
      }
    }

    public bool Unsubscribe() {
      try {
        ISlaveCommunicationCallbacks callback = OperationContext.Current.GetCallbackChannel<ISlaveCommunicationCallbacks>();
        if (subscribers.Contains(callback))
          subscribers.Remove(callback);
        return true;
      }
      catch {
        return false;
      }
    }

    public void LogMessage(string message) {
      subscribers.ForEach(delegate(ISlaveCommunicationCallbacks callback) {
        if (((ICommunicationObject)callback).State == CommunicationState.Opened) {
          callback.OnMessageLogged(message);
        } else {
          subscribers.Remove(callback);
        }
      });
    }

    public void StatusChanged(Salve.StatusCommons status) {
      subscribers.ForEach(delegate(ISlaveCommunicationCallbacks callback) {
        if (((ICommunicationObject)callback).State == CommunicationState.Opened) {
          callback.OnStatusChanged(status);
        } else {
          subscribers.Remove(callback);
        }
      });
    }

    public void Shutdown() {
      subscribers.ForEach(delegate(ISlaveCommunicationCallbacks callback) {
        if (((ICommunicationObject)callback).State == CommunicationState.Opened) {
          callback.OnShutdown();
        } else {
          subscribers.Remove(callback);
        }
      });
    }

  }
}