Training:Logging OCL in Turnkey

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