void TimedREConnectionMonitor_SkippedFreeingConnection(string reasonSkipped, FreeingEventArgs e)
{
logBuffer.AppendFormat("Skipped - {0}\n", reasonSkipped);
}
void TimedREConnectionMonitor_FreeingConnection(FreeingEventArgs e)
{
}
// Base implementation
public virtual IEnumerable <FilteredLockConnection> FreeConnections(bool debug)
{
try
{
// Connect to the database using the connection string specified in the app settings
var connectionString = Settings[MonitorSettings.DBConnectionString];
if (ConnectingToDatabase != null)
{
ConnectingToDatabase(ref connectionString);
}
var db = new Parise.RaisersEdge.ConnectionMonitor.Data.RecmDataContext(connectionString);
db.Log = Console.Out;
if (ConnectedToDatabase != null)
{
ConnectedToDatabase(db);
}
#region Dead Connection Lock Clean Up (RE Stored Procedure)
// Clean up dead connection locks - very important
// Affects the dbo.LOCKCONNECTIONS table
if (CleaningUpDeadLocks != null)
{
CleaningUpDeadLocks(db);
}
var spResult = db.CleanupDeadConnectionLocks();
if (CleanedUpDeadLocks != null)
{
CleanedUpDeadLocks(spResult);
}
#endregion
// Retrieve entire connection list from DB and order by idle time
// ToList() forces LINQ to retrieve data from the server
//StatusMessage(db.GetCommand(db.LockConnections_AllActiveREConnections_ClientOnly.AsQueryable()).CommandText);
var connectionList = db.LockConnections_AllActiveREConnections_ClientOnly.OrderByDescending(a => a.REProcess.IdleTime.TotalMilliseconds);
// Get licenses in use (Distinct RE User Names)
var inUse = connectionList.Select(l => l.Lock.User).Distinct().Count();
var totalLicenseCount = int.Parse(Settings[MonitorSettings.NumLicenses]);
var leastMinutesIdle = double.Parse(Settings[MonitorSettings.LeastMinutesIdle]);
if (StatusMessage != null)
{
StatusMessage(string.Format("{0}/{1} licenses in use.", inUse, totalLicenseCount));
}
if (inUse >= totalLicenseCount)
{
// Get exclusion list
var excludedHosts = Settings[MonitorSettings.ExcludedHosts].ToLower();
var excludedREUsers = Settings[MonitorSettings.ExcludedREUsers].ToLower();
// Get candidates that are over the idle limit and not excluded
var bootCandidates = connectionList.Where(a =>
!excludedREUsers.Contains(a.Lock.User.Name.ToLower()) &&
!excludedHosts.Contains(a.Lock.MachineName.Split(':')[0].ToLower()) &&
a.AllProcesses.First().IdleTime.TotalMinutes >= leastMinutesIdle);
// Take enough to free one license - this ensures proper freeing if the service is restarted
var bootList = bootCandidates.Take(inUse - totalLicenseCount + 1);
if (StatusMessage != null)
{
StatusMessage(string.Format("Attempting to free {0} license(s).\n\nBooting {1} of {2} candidates.\n\n", inUse - totalLicenseCount + 1, bootCandidates.Count(), bootList.Count()));
}
var actualBootList = new List <FilteredLockConnection> {
};
foreach (var connection in bootList)
{
if (FreeingLock != null)
{
FreeingLock(connection);
}
// Refresh the current status of the process and related items
var freshProcess = connection.REProcess;
try
{
db.Refresh(RefreshMode.OverwriteCurrentValues, connection.REProcess);
// We only want to kill sleeping processes!!!
var sleepingCount = freshProcess.RelatedProcesses.Where(p => p.status.Trim().Equals("sleeping", StringComparison.CurrentCultureIgnoreCase)).Count();
if (sleepingCount == freshProcess.RelatedProcesses.Count)
{
//loggableEntry += connection.Lock.MachineName + " -- " + connection.Lock.User.Name + " -- " + connection.REProcess.hostname + "\n";
//"\tIssued kill " + process.spid + " -- " + process.program_name.Trim() + " -- " + process.status.Trim() + " -- " + process.IdleTimeFormatted("{h:D2}:{m:D2}:{s:D2}:{ms:D2}\n");
foreach (var process in freshProcess.RelatedProcesses)
{
var killResult = 99;
bool killIt = true;
if (FreeingConnection != null)
{
var args = new FreeingEventArgs(connection, process);
FreeingConnection(args);
killIt = !args.Cancel;
}
if (killIt)
{
// This will kill the SQL process
if (!debug)
{
killResult = db.Kill(process);
}
if (FreedConnection != null)
{
FreedConnection(new FreedEventArgs(connection, process, killResult));
}
}
}
actualBootList.Add(connection);
}
else
{
if (SkippedFreeingConnection != null)
{
SkippedFreeingConnection("Some related processes are active.", new FreeingEventArgs(connection, connection.REProcess));
}
}
}
catch (Exception err)
{
if (GenericError != null)
{
GenericError(new ErrorEventArgs <Exception>(err));
}
}
}
db.Dispose();
return(actualBootList);
}
else
{
db.Dispose();
return(new List <FilteredLockConnection> {
});
}
}
catch (Exception err)
{
if (GenericError != null)
{
GenericError(new ErrorEventArgs <Exception>(err));
}
return(new List <FilteredLockConnection> {
});
}
}
