Question

How to configure EmailTraceListener to avoid over-flooded mailbox (on mass problem)?

Is it possible to setup a maximum for messages sent (per hour/per day) using logging applicaiton block configuration?

P.S. I have done it already with some conditions before calling WriteLog, but would like to move all this stuff to the configuration…

Answer 1

OK. I wrote this solution, and for me it is enough (max 200 per day):

public class MyEmailTraceListener : EmailTraceListener
{
    public const int MAXPER24HOURS = 200;
    public static int counter =0;
    public static DateTime counterReStarted = DateTime.Today;


    private static bool CanLog()
    {
        bool returnValue = false;
        DateTime today = DateTime.Today;
        if (counter < MAXPER24HOURS)
        {
            counter++;
            returnValue=true;
        }
        else if (today>counterReStarted)
        {
            counter = 0;
            counterReStarted = today;
            returnValue = true;
        }
        return returnValue;
    }


    public MyEmailTraceListener(string toAddress, string fromAddress, string subjectLineStarter, string subjectLineEnder, string smtpServer,  int id, ILogFormatter formatter)
        :base(toAddress,        fromAddress,         subjectLineStarter,       subjectLineEnder, smtpServer, id, formatter)
    {
    }

    public MyEmailTraceListener()
    {
    }

    public override void TraceData(TraceEventCache eventCache, string source, TraceEventType eventType, int id, object data)
    {
        if (CanLog())
            base.TraceData(eventCache, source, eventType, id, data);
    } 
}

public class MyTraceListenerAssembler : EmailTraceListenerAssembler 
{
    public override TraceListener Assemble(IBuilderContext context, TraceListenerData objectConfiguration, IConfigurationSource configurationSource, ConfigurationReflectionCache reflectionCache)
    {
        MyEmailTraceListenerData data = (MyEmailTraceListenerData)objectConfiguration;
        return new MyEmailTraceListener(data.ToAddress, data.FromAddress, data.SubjectLineStarter, data.SubjectLineEnder, data.SmtpServer, data.SmtpPort, base.GetFormatter(context, data.Formatter, configurationSource, reflectionCache));
    }
}

[Assembler(typeof(MyTraceListenerAssembler))]
public class MyEmailTraceListenerData : EmailTraceListenerData
{
}