private void Execute(object a)
{
if (servicePaused || !serviceStarted)
{
return;
}
// Constrain the number of worker threads (Omitted here.)
var threadInfo = a as ThreadExecuteInfo;
if (threadInfo == null)
{
return;
}
if (!threads[threadInfo.ClassName].IsRunning)
{
threads[threadInfo.ClassName].IsRunning = true;
try
{
log.Error("Thread start " + threadInfo.Description + " " + threadInfo.JobId);
threads[threadInfo.ClassName].Description = threadInfo.Description;
threads[threadInfo.ClassName].Execute();
DbCron.TouchLastFinished(threadInfo.JobId);
}
catch (Exception ex)
{
log.Error("Job threw an exception", ex);
DbCron.TouchLastErrorMessage(threadInfo.JobId, ex.Message);
}
finally
{
threads[threadInfo.ClassName].IsRunning = false;
}
}
else
{
log.Info("Skipped " + threadInfo.JobId + " becuase job with engine " + threadInfo.ClassName + " is already running.");
}
}
private void InitCron()
{
servicePaused = true;
log.Debug("Clearing existing cron entries and threads");
cronEntries = null;
var safeForReload = threads.Values.Count == 0;
var waitingForReloadCount = 0;
while (!safeForReload)
{
waitingForReloadCount++;
safeForReload = true;
foreach (var t in threads.Values)
{
if (t.IsRunning)
{
safeForReload = false;
}
}
if (!safeForReload)
{
if (waitingForReloadCount < MAX_RELOAD_COUNT)
{
log.Info("Waiting 100 seconds for threads to exit in order to reload crontab.");
Thread.Sleep(RELOAD_DELAY);
}
else
{
log.Fatal("Too many retries while waiting for threads to exit (" + ((MAX_RELOAD_COUNT * RELOAD_DELAY) / 3600000) + "hrs). Stoping service.");
Stop();
return;
}
}
}
threads = null;
log.Info("Now starting load of new cron entries");
try
{
cronEntries = DbCron.List();
}
catch (Exception ex)
{
log.Error("InitCron()", ex);
loadCrontabErrors++;
}
if (cronEntries != null && loadCrontabErrors > 0)
{
log.Info("Crontab error count cleared.");
loadCrontabErrors = 0;
}
if (cronEntries != null)
{
threads = new Dictionary <string, IJob>();
foreach (var cron in cronEntries)
{
if (!threads.ContainsKey(cron.ClassName))
{
var job = JobFactory.CreateJob(cron.ClassName);
if (job != null)
{
threads[cron.ClassName] = job;
}
else
{
log.Error("Class " + cron.ClassName + " not loaded.");
}
}
}
log.Info("Found " + threads.Count + " cron plugins");
}
servicePaused = false;
}
