source: branches/2213_irace/HeuristicLab.PluginInfrastructure/3.3/CrossDomainTracing.cs @ 16573

#region License Information
/* HeuristicLab
 * Copyright (C) 2002-2018 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.Diagnostics;
using System.IO;
using System.Reflection;

namespace HeuristicLab.PluginInfrastructure {
  public delegate void TraceWriterHandler(string message);

  internal class SynchronizedTraceListener : TraceListener {
    private TraceWriterHandler messageHandler;

    public SynchronizedTraceListener(TraceWriterHandler writeHandler) {
      messageHandler = writeHandler;
    }

    public override void Write(string message) {
      messageHandler(message);
    }

    public override void WriteLine(string message) {
      messageHandler(message + Environment.NewLine);
    }
  }

  [Serializable]
  public sealed class CrossDomainTracer : MarshalByRefObject {
    private CrossDomainTracer remoteTracer;
    private SynchronizedTraceListener remoteListener;

    public CrossDomainTracer() {
    }

    public static void StartListening(AppDomain remoteDomain) {
      var tracer = new CrossDomainTracer(remoteDomain);
      Trace.Listeners.Add(new SynchronizedTraceListener(new TraceWriterHandler(Console.Write)));
    }

    public CrossDomainTracer(AppDomain farDomain) {
      AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
      this.remoteTracer = farDomain.CreateInstanceFrom(Assembly.GetExecutingAssembly().Location, typeof(CrossDomainTracer).FullName).Unwrap() as CrossDomainTracer;
      AppDomain.CurrentDomain.AssemblyResolve -= new ResolveEventHandler(CurrentDomain_AssemblyResolve);
      if (remoteTracer != null) {
        remoteTracer.StartListening(this);
      }
    }

    public void StartListening(CrossDomainTracer farTracer) {
      this.remoteTracer = farTracer;
      this.remoteListener = new SynchronizedTraceListener(new TraceWriterHandler(Write));
      Trace.Listeners.Add(this.remoteListener);
    }

    public void Write(string message) {
      this.remoteTracer.RemoteWrite(message);
    }

    public void RemoteWrite(string message) {
      Trace.Write(message);
    }

    Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args) {
      try {
        Assembly assembly = Assembly.Load(args.Name);
        if (assembly != null) {
          return assembly;
        }
      } catch { }

      // Try to load by assembly fullname (path to file)
      string[] Parts = args.Name.Split(',');
      string File = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location) + "\\" + Parts[0].Trim() + ".dll";

      return Assembly.LoadFrom(File);
    }
  }
}