/// <summary>
/// This is a sequential scheduler that benefits from not blocking Corrade
/// and guarrantees that any Corrade thread spawned this way will only execute
/// until the previous thread spawned this way has completed.
/// </summary>
/// <param name="s">the code to execute as a ThreadStart delegate</param>
/// <param name="m">the maximum amount of threads</param>
/// <param name="millisecondsTimeout">
/// the timeout in milliseconds before considering the previous thread as vanished
/// </param>
public void SpawnSequential(Action s, uint m, uint millisecondsTimeout)
{
if (smartThreadPool.InUseThreads > m)
{
return;
}
var threadType = this.threadType;
smartThreadPool.QueueWorkItem(() =>
{
// protect inner thread
try
{
SequentialThreadCompletedEvent.Wait((int)millisecondsTimeout);
SequentialThreadCompletedEvent.Reset();
s();
SequentialThreadCompletedEvent.Set();
}
catch (Exception ex)
{
Corrade.Feedback(
Reflection.GetDescriptionFromEnumValue(
global::Corrade.Enumerations.ConsoleMessage.UNCAUGHT_EXCEPTION_FOR_THREAD),
Reflection.GetNameFromEnumValue(threadType),
ex?.Message,
ex.PrettyPrint(),
ex?.InnerException?.Message);
}
});
}
/// <summary>
/// This is an ad-hoc scheduler where threads will be executed in a
/// first-come first-served fashion.
/// </summary>
/// <param name="s">the code to execute as a ThreadStart delegate</param>
/// <param name="m">the maximum amount of threads</param>
public void Spawn(Action s, uint m)
{
if (smartThreadPool.InUseThreads > m)
{
return;
}
var threadType = this.threadType;
smartThreadPool.QueueWorkItem(() =>
{
// protect inner thread
try
{
s();
}
catch (Exception ex)
{
Corrade.Feedback(
Reflection.GetDescriptionFromEnumValue(
global::Corrade.Enumerations.ConsoleMessage.UNCAUGHT_EXCEPTION_FOR_THREAD),
Reflection.GetNameFromEnumValue(threadType), ex.PrettyPrint());
}
});
}
LoadSerializedNotificationParameters(
Configuration.Notifications type)
{
var path = Path.Combine(CORRADE_CONSTANTS.TEMPLATES_DIRECTORY,
CORRADE_CONSTANTS.NOTIFICATIONS_TEMPLATE_DIRECTORY,
Reflection.GetNameFromEnumValue(type) + ".xml");
if (!File.Exists(path))
{
Corrade.Feedback(
Reflection.GetDescriptionFromEnumValue(
Enumerations.ConsoleMessage.COULD_NOT_FIND_NOTIFICATION_FILE));
return(null);
}
// Deserialize the notification data.
SerializedNotification notification;
try
{
notification =
SerializedNotification.LoadFromFile(path);
}
catch (Exception ex)
{
Corrade.Feedback(
Reflection.GetDescriptionFromEnumValue(
Enumerations.ConsoleMessage.UNABLE_TO_DESERIALIZE_NOTIFICATION_DATA), ex.PrettyPrint());
return(null);
}
if (!notification.Notification.Equals(type))
{
Corrade.Feedback(
Reflection.GetDescriptionFromEnumValue(
Enumerations.ConsoleMessage.PARAMETERS_FOR_REQUESTED_EVENT_NOT_FOUND));
return(null);
}
return(notification);
}
/// <summary>
/// This is a fairness-oriented group/time-based scheduler that monitors
/// the execution time of threads for each configured group and favors
/// threads for the configured groups that have the smallest accumulated
/// execution time.
/// </summary>
/// <param name="s">the code to execute as a ThreadStart delegate</param>
/// <param name="m">the maximum amount of threads</param>
/// <param name="groupUUID">the UUID of the group</param>
/// <param name="expiration">the time in milliseconds after which measurements are expunged</param>
public IWorkItemResult <T> Spawn <T>(Amib.Threading.Func <T> s, uint m, UUID groupUUID, uint expiration)
{
// Don't accept to schedule bogus groups.
if (groupUUID.Equals(UUID.Zero))
{
return(default(IWorkItemResult <T>));
}
if (smartThreadPool.InUseThreads > m)
{
return(default(IWorkItemResult <T>));
}
var workItemPriority = WorkItemPriority.Normal;
lock (GroupExecutionSetLock)
{
// Clear threads that are not restricted anymore due to expiration.
GroupExecutionSet.RemoveWhere(o => (DateTime.UtcNow - o.TimeStamp).Milliseconds > expiration);
var groupExecution = GroupExecutionSet.FirstOrDefault(o => o.GroupUUID.Equals(groupUUID));
// Adjust the priority depending on the time spent executing a command.
if (GroupExecutionSet.Count > 1 && !groupExecution.Equals(default(GroupExecution)))
{
workItemPriority =
threadRangePriority[
(int)(100L * groupExecution.ExecutionTime / GroupExecutionSet.Sum(o => o.ExecutionTime))];
}
}
// Spawn.
var threadType = this.threadType;
return(smartThreadPool.QueueWorkItem(() =>
{
// protect inner thread
var result = default(T);
try
{
ThreadExecutuionStopwatch.Restart();
result = s();
ThreadExecutuionStopwatch.Stop();
lock (GroupExecutionSetLock)
{
// add or change the mean execution time for a group
var groupExecution =
GroupExecutionSet.AsParallel().FirstOrDefault(o => o.GroupUUID.Equals(groupUUID));
switch (!groupExecution.Equals(default(GroupExecution)))
{
case true:
GroupExecutionSet.Remove(groupExecution);
groupExecution.ExecutionTime = (groupExecution.ExecutionTime +
ThreadExecutuionStopwatch.ElapsedMilliseconds) / 2;
groupExecution.TimeStamp = DateTime.UtcNow;
GroupExecutionSet.Add(groupExecution);
break;
default:
GroupExecutionSet.Add(new GroupExecution
{
GroupUUID = groupUUID,
ExecutionTime = ThreadExecutuionStopwatch.ElapsedMilliseconds,
TimeStamp = DateTime.UtcNow
});
break;
}
}
}
catch (Exception ex)
{
Corrade.Feedback(
Reflection.GetDescriptionFromEnumValue(
global::Corrade.Enumerations.ConsoleMessage.UNCAUGHT_EXCEPTION_FOR_THREAD),
Reflection.GetNameFromEnumValue(threadType), ex.PrettyPrint());
}
return result;
}, workItemPriority));
}
