private void ProcessSchedule()
{
ArrayBackedCollection <ScheduleHandle> handles = ScheduleArray;
// Evaluation of schedules is protected by an optional scheduling service lock and then the engine lock
// We want to stay in this order for allowing the engine lock as a second-order lock to the
// services own lock, if it has one.
using (_unisolatedServices.EventProcessingRWLock.AcquireReadLock())
{
_services.SchedulingService.Evaluate(handles);
}
using (_unisolatedServices.EventProcessingRWLock.AcquireReadLock())
{
try
{
ProcessScheduleHandles(handles);
}
catch (Exception)
{
handles.Clear();
throw;
}
}
}
private void ProcessScheduleHandles(ArrayBackedCollection <ScheduleHandle> handles)
{
if (ThreadLogUtil.ENABLED_TRACE)
{
ThreadLogUtil.Trace("Found schedules for", handles.Count);
}
if (handles.Count == 0)
{
return;
}
// handle 1 result separatly for performance reasons
if (handles.Count == 1)
{
Object[] handleArray = handles.Array;
var handle = (EPStatementHandleCallback)handleArray[0];
EPRuntimeImpl.ProcessStatementScheduleSingle(handle, _unisolatedServices);
handles.Clear();
return;
}
Object[] matchArray = handles.Array;
int entryCount = handles.Count;
LinkedList <ScheduleHandleCallback> entries;
// sort multiple matches for the event into statements
var stmtCallbacks = SchedulePerStmt;
stmtCallbacks.Clear();
for (int i = 0; i < entryCount; i++)
{
var handleCallback = (EPStatementHandleCallback)matchArray[i];
var handle = handleCallback.AgentInstanceHandle;
var callback = handleCallback.ScheduleCallback;
var entry = stmtCallbacks.Get(handle);
// This statement has not been encountered before
if (entry == null)
{
stmtCallbacks.Put(handle, callback);
continue;
}
// This statement has been encountered once before
if (entry is ScheduleHandleCallback)
{
var existingCallback = (ScheduleHandleCallback)entry;
entries = new LinkedList <ScheduleHandleCallback>();
entries.AddLast(existingCallback);
entries.AddLast(callback);
stmtCallbacks.Put(handle, entries);
continue;
}
// This statement has been encountered more then once before
entries = (LinkedList <ScheduleHandleCallback>)entry;
entries.AddLast(callback);
}
handles.Clear();
foreach (var entry in stmtCallbacks)
{
var handle = entry.Key;
var callbackObject = entry.Value;
EPRuntimeImpl.ProcessStatementScheduleMultiple(handle, callbackObject, _unisolatedServices);
if ((_isPrioritized) && (handle.IsPreemptive))
{
break;
}
}
}
