Event log

IEventLogService eventLog = Service.Resolve<IEventLogService>();

// In case of database outage, the system buffers all logged events in-memory until the database is available. 
// You do not need to buffer or check for database availability in custom code.

// Logs an information event into the event log
eventLog.LogInformation("API Example Info", "APIEXAMPLE", eventDescription: "Test information event.");

// Logs a warning event into the event log
eventLog.LogWarning("API Example Warning", "APIEXAMPLE", eventDescription: "Test warning event.");

// Logs an error event into the event log
eventLog.LogError("API Example Error", "APIEXAMPLE", eventDescription: "Test error event.");

// Logs an exception into the event log
eventLog.LogException("API Example Exception", "APIEXAMPLE", new Exception(), additionalMessage: "Test exception event.");

IEventLogService eventLog = Service.Resolve<IEventLogService>();

// Prepares an EventLogData object that holds all information about the event being logged
EventLogData eventData = new EventLogData(EventTypeEnum.Information, "API Example", "APIEXAMPLE")
{
    SiteID = SiteContext.CurrentSiteID,
    EventTime = DateTime.Now,
    EventDescription = "Logging a sample event to the event log."
};


// Logs the event into the event log
eventLog.LogEvent(eventData);

// Gets all error events logged in the past day 
var errors = EventLogInfo.Provider.Get()
                                .WhereEquals("EventType", EventType.ERROR)                                          
                                .WhereGreaterThan("EventTime", DateTime.Now.Subtract(TimeSpan.FromDays(1)));

if (errors.Count > 0)
{
    // Creates the email message
    EmailMessage msg = new EmailMessage()
    {
        From = "system@localhost.local",
        Recipients = "admin@localhost.local",
        Subject = "Xperience Errors (" + errors.Count + ")",
        Body = "<html><body><ul>"
    };
    
    // Creates a list of the errors
    foreach (EventLogInfo errorEvent in errors)
    {
        msg.Body += String.Format("<li>{0} - {1} - {2}</li>", errorEvent.EventType, errorEvent.EventCode, errorEvent.EventDescription.Substring(0, 100));
    }

    msg.Body += "</ul></body></html>";

    // Sends out the email message
    EmailSender.SendEmail(msg);
}

// Clears the event log for the current site
EventLogHelper.ClearEventLog(MembershipContext.AuthenticatedUser.UserID, MembershipContext.AuthenticatedUser.UserName, RequestContext.UserHostAddress, SiteContext.CurrentSiteID);