/// <summary>
/// Creates a thread manager which provides starting actions in new threads.
/// </summary>
/// <param name="parallelThreads">The maximum number of threads that could be efficiently run in parallel.</param>
protected ThreadManager(byte parallelThreads)
{
_parallelThreads = parallelThreads;
_computationalThreadStatuses = new ComputationalThreadStatus[parallelThreads];
_threadStatuses = Array.AsReadOnly(_computationalThreadStatuses);
_availableThreads = new ConcurrentQueue<int>();
for (var i = 0; i < _computationalThreadStatuses.Length; i++)
{
_computationalThreadStatuses[i] = new ComputationalThreadStatus();
_availableThreads.Enqueue(i);
}
}
/// <summary>
/// Creates a thread manager which provides starting actions in new threads.
/// </summary>
/// <param name="parallelThreads">The maximum number of threads that could be efficiently run in parallel.</param>
protected ThreadManager(byte parallelThreads)
{
_parallelThreads = parallelThreads;
_computationalThreadStatuses = new ComputationalThreadStatus[parallelThreads];
_threadStatuses = Array.AsReadOnly(_computationalThreadStatuses);
_availableThreads = new ConcurrentQueue <int>();
for (var i = 0; i < _computationalThreadStatuses.Length; i++)
{
_computationalThreadStatuses[i] = new ComputationalThreadStatus();
_availableThreads.Enqueue(i);
}
}
/// <summary>
/// Starts executing action if there is an available idle thread. This method gets information needed for Status
/// messages.
/// </summary>
/// <param name="actionToExecute">An action to be executed in new thread. If null no new thread will be started.</param>
/// <param name="actionOnException">
/// An action to be executed when exception occurs in started thread. If null exception
/// will be ignored.
/// </param>
/// <param name="problemType">The name of the type as given by TaskSolver.</param>
/// <param name="problemInstanceId">The ID of the problem assigned when client connected.</param>
/// <param name="partialProblemId">The ID of the task within given problem instance.</param>
/// <returns>True if thread was successfully started; false otherwise.</returns>
public bool StartInNewThread(Action actionToExecute, Action <Exception> actionOnException, string problemType,
ulong?problemInstanceId, ulong?partialProblemId)
{
if (actionToExecute == null)
{
return(false);
}
int threadIndex;
if (!_availableThreads.TryDequeue(out threadIndex))
{
return(false);
}
var started = StartInNewThread(() =>
{
_computationalThreadStatuses[threadIndex] = new ComputationalThreadStatus(problemType, problemInstanceId,
partialProblemId);
try
{
actionToExecute();
}
catch (Exception ex)
{
if (actionOnException != null)
{
actionOnException(ex);
}
}
finally
{
_computationalThreadStatuses[threadIndex] = new ComputationalThreadStatus();
_availableThreads.Enqueue(threadIndex);
}
});
return(started);
}
/// <summary>
/// Starts executing action if there is an available idle thread. This method gets information needed for Status
/// messages.
/// </summary>
/// <param name="actionToExecute">An action to be executed in new thread. If null no new thread will be started.</param>
/// <param name="actionOnException">
/// An action to be executed when exception occurs in started thread. If null exception
/// will be ignored.
/// </param>
/// <param name="problemType">The name of the type as given by TaskSolver.</param>
/// <param name="problemInstanceId">The ID of the problem assigned when client connected.</param>
/// <param name="partialProblemId">The ID of the task within given problem instance.</param>
/// <returns>True if thread was successfully started; false otherwise.</returns>
public bool StartInNewThread(Action actionToExecute, Action<Exception> actionOnException, string problemType,
ulong? problemInstanceId, ulong? partialProblemId)
{
if (actionToExecute == null)
return false;
int threadIndex;
if (!_availableThreads.TryDequeue(out threadIndex))
return false;
var started = StartInNewThread(() =>
{
_computationalThreadStatuses[threadIndex] = new ComputationalThreadStatus(problemType, problemInstanceId,
partialProblemId);
try
{
actionToExecute();
}
catch (Exception ex)
{
if (actionOnException != null)
actionOnException(ex);
}
finally
{
_computationalThreadStatuses[threadIndex] = new ComputationalThreadStatus();
_availableThreads.Enqueue(threadIndex);
}
});
return started;
}
