/// <summary>
/// Runs the execution of unfinished work scheduled to be executed up to the current time.
/// </summary>
public void RunScheduledExecutors()
{
List<ExecutorWorkload> workLoads;
List<ExecutorState> currentStates;
List<ExecutorState> newStates = new List<ExecutorState>();
List<ExecutionProtocol> newProtocols = new List<ExecutionProtocol>();
using (ExecutionContext context = new ExecutionContext())
{
workLoads = (from work in context.Workloads where work.Done == false && work.Scheduled >= DateTime.Now orderby work.Scheduled select work).ToList();
currentStates = (from state in context.ExecutorStates where state.IsActive select state).ToList();
}
foreach (ExecutorWorkload work in workLoads)
{
IExecutor executor = executors[work.ExecutorId];
ExecutorState oldState = currentStates.Where(s => s.ExecutorId == executor.ExecutorId).FirstOrDefault();
if (oldState != null)
{
executor.SetState(oldState);
}
Stopwatch watch = new System.Diagnostics.Stopwatch();
DateTime lastExecuted = DateTime.MinValue;
try
{
Trace.Write(String.Format("Checking workload by exeutor {0} ({1})", executor.ExecutorName, executor.ExecutorId), TRACE_CATEG);
try
{
executor.Check();
}
catch (Exception checkEx)
{
Trace.Write(String.Format("Executor could not be run: {0}", checkEx.Message), TRACE_CATEG);
continue;
}
lastExecuted = DateTime.Now;
watch.Start();
executor.Execute();
watch.Stop();
}
catch(Exception executionException)
{
Trace.Write(String.Format("Error during execution: {0}", executionException.Message), TRACE_CATEG);
try
{
executor.Rollback();
}
catch (Exception rollbackEx)
{
Trace.Write(String.Format("Rollback failed: {0}", rollbackEx.Message), TRACE_CATEG);
throw;
}
}
ExecutionProtocol protocol = new ExecutionProtocol();
XDocument protocolExtra;
long outputProduced;
ExecutorState newState = executor.Conclude(out outputProduced, out protocolExtra);
newState.LastExecuted = DateTime.Now;
newState.TotalExecutionTime += watch.ElapsedMilliseconds;
newState.TotalOutputProduced += protocol.OutputProduced;
newState.TotalExecutions++;
protocol.Settings = protocolExtra;
protocol.OutputProduced = outputProduced;
protocol.ExecutorId = executor.ExecutorId;
protocol.Workload = work;
protocol.ExecutionTime = watch.ElapsedMilliseconds;
protocol.StateBefore = oldState;
protocol.StateAfter = newState;
newState.IsActive = true;
oldState.IsActive = false;
newStates.Add(newState);
newProtocols.Add(protocol);
work.Done = true;
}
// Maybe the Find is not necessary and a reference is kept to the original object.
using (ExecutionContext context = new ExecutionContext())
{
foreach(var newState in newStates)
{
context.ExecutorStates.Add(newState);
var oldState = context.ExecutorStates.Find(newState.ExecutorId);
oldState.IsActive = false;
}
foreach (var work in workLoads.Where(w => w.Done == true))
{
var oldWork = context.Workloads.Find(work.WorkloadId);
oldWork.Done = true;
}
foreach (ExecutionProtocol protocol in newProtocols)
{
context.ExecutionProtocols.Add(protocol);
}
context.SaveChanges();
}
}
private List<ExecutionProtocol> NewProtocols()
{
using (ExecutionContext context = new ExecutionContext())
{
return (from protocol in context.ExecutionProtocols where protocol.ConsideredByMaster == false select protocol).ToList<ExecutionProtocol>();
}
}
private void OptimizeTimeForWork(List<ExecutorWorkload> availableWork, ExecutionContext context)
{
foreach (var workLoad in availableWork)
{
context.Workloads.Add(workLoad);
}
}
/// <summary>
/// Schedules work for the executors loaded, if possible
/// </summary>
public void ScheduleWork()
{
List<IExecutor> interested = new List<IExecutor>();
List<ExecutionProtocol> protocols = NewProtocols();
List<ExecutorWorkload> availableWork = new List<ExecutorWorkload>();
using (ExecutionContext context = new ExecutionContext())
{
ExecutorState[] execuorStates = (from state in context.ExecutorStates select state).ToArray();
foreach (IExecutor exec in executors.Values)
{
ExecutorState state = execuorStates.Where(st => st.ExecutorId == exec.ExecutorId).FirstOrDefault();
if (state != null)
{
if (state.HasWork == true)
{
continue;
}
exec.SetState(state);
}
ExecutorWorkload newWorkload;
List<ExecutionProtocol> relevantProtocols = (from p in protocols where exec.ExecutorsFollowed.Contains(p.ExecutorId) select p).ToList();
ExecutorState newState = exec.ViewNewProtocols(relevantProtocols, out newWorkload);
state = newState;
if (newState.HasWork)
{
availableWork.Add(newWorkload);
}
}
OptimizeTimeForWork(availableWork, context);
context.SaveChanges();
}
}