Training:Logging OCL in Turnkey

You can 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:

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:

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