View source for Documentation:Logging OCL in Turnkey

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Expand your TK app with your own OCL logging if you are using CodeDress. This will work and have the same features as the designer's built-in logging.

Create a transient and singleton class like this:

[[File:SysLoggingClass.png|none|thumb|290x290px]]Add code similar to the one at the bottom of this page to the class methods.

Create a ViewModel like the example below to use the class:[[File:SysLoggingViewmodel.png|none|thumb|517x517px]]
[[File:SysLoggingView.png|none|thumb|554x554px]]

I created a variable on the view with the name vLogText.

GetLog action does this:
 vLogText := self.GetLog
GetUsageStats action does this:
 vLogText := self.GetUsageStats
The method SO() is a shortcut for:
 SysLogging.oclSingleton
Code for the class:

  public partial class SysLogging
    {
      StringBuilder sb = new StringBuilder(100000);
      void Singleton_OnTraceLog(object sender, Eco.Logging.TraceEventArgs e)
      {
        if (sb.Length > 5000000)
          sb.Clear();
        sb.AppendLine(e.Message);
      }
  
      [UmlElement(Id = "ee54deb5-3024-47c2-be01-7c93faa6638a")]
      public void StartLogging()
      {
        this.StopLogging();
        EcoLogSwitches.LogOcl = this.LogOcl;
        EcoLogSwitches.LogEAL = this.LogEAL;
        EcoLogSwitches.LogPMapper = this.LogPMapper;
        EcoLogSwitches.LogSql = this.LogSql;
        EcoLogSwitches.LogSqlMeta = this.LogSqlMeta;
        EcoLogSwitches.LogActionExecute = this.LogActionExecute;
        EcoLogSwitches.LogActionEnable = this.LogActionEnable;
        EcoLogSwitches.LogMethods = this.LogMethods;
        EcoLogSwitches.CollectAssociationUsageStats = this.CollectAssociationUsageStats;
        EcoLogSwitches.LogWecpof = this.LogWecpof;
  
        EcoListener.Singleton.OnTraceLog += Singleton_OnTraceLog;
        EcoListener.StartListening();
      }
  
      [UmlElement(Id = "ace10ea6-8793-4205-a2eb-9f22b9391701")]
      public string GetLog()
      {
        string text = sb.ToString();
        sb.Clear();
        return text;
      }
  
      [UmlElement(Id = "3d2941f2-75ca-4a41-a5e8-465ddcfa2904")]
      public void StopLogging()
      {
        EcoListener.Singleton.OnTraceLog -= Singleton_OnTraceLog;
        Eco.Logging.EcoListener.StopListening();
      }
  
      [UmlElement(Id = "a4e7d189-a056-4be4-8e07-ea42d72505ac")]
      public string GetUsageStats()
      {
        StringBuilder stats = new StringBuilder();
        lock (EcoSupport.AssociationUsageStats)
        {
          if (EcoSupport.AssociationUsageStats.Count > 0)
          {
            foreach (KeyValuePair<string, int> x in EcoSupport.AssociationUsageStats)
            {
              stats.AppendLine(x.Key + " = " + x.Value.ToString());
            }
          }
          else
            stats.AppendLine("No stats in log");
        }
        return stats.ToString();
      }
    }
 }
See also: [[Logging what MDriven does]]

Keywords: debugging OCL, logging, performance
[[Category:Advanced]]