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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Task.Scheduled;
interface
uses
Boolean,
Collection.List,
Condition.Projecting,
DateTime.Calendar.Gregorian.Instant,
Exception,
Object_.ReferenceCounted,
Task,
Task.Status,
Thread.Event;
type
TScheduledTask = class(TReferenceCountedObject)
private
FTask: TTask;
FStartTime: TGregorianInstant;
procedure SetTask(const Value: TTask);
procedure SetStartTime(const Value: TGregorianInstant);
public
Dependencies: TList<TTask>;
State: TTaskState;
ThreadEvent: TThreadEvent;
Exception: EException;
constructor Create(); override;
destructor Destroy(); override;
procedure Execute();
property Task: TTask read FTask write SetTask;
property StartTime: TGregorianInstant read FStartTime write SetStartTime;
public
type
TWithTask = class(TProjectingCondition<TScheduledTask, TTask>)
public
function Matches(const Task: TScheduledTask): TBoolean; override;
end;
TWithState = class(TProjectingCondition<TScheduledTask, TTaskState>)
public
function Matches(const Task: TScheduledTask): TBoolean; override;
end;
end;
implementation
uses
Object_.List,
Object_.Reference.Counter;
{ TScheduledTask }
constructor TScheduledTask.Create();
begin
inherited Create();
Dependencies := TObjectList<TTask>.Create();
Dependencies.ElementManager := TReferenceCounter<TTask>.Create();
ThreadEvent := TThreadEvent.Create(True, False);
end;
destructor TScheduledTask.Destroy();
begin
ThreadEvent.Free();
Exception.Free();
Dependencies.Free();
Task.ReleaseReference();
StartTime.ReleaseReference();
inherited Destroy();
end;
procedure TScheduledTask.Execute();
begin
try
Task.Execute();
finally
ThreadEvent.Signal();
end;
end;
procedure TScheduledTask.SetStartTime(const Value: TGregorianInstant);
begin
if Value <> StartTime then
begin
Value.AddReference();
StartTime.ReleaseReference();
FStartTime := Value;
end;
end;
procedure TScheduledTask.SetTask(const Value: TTask);
begin
if Value <> Task then
begin
Value.AddReference();
Task.ReleaseReference();
FTask := Value;
end;
end;
{ TScheduledTask.TWithTask }
function TScheduledTask.TWithTask.Matches(const Task: TScheduledTask): TBoolean;
begin
Result := Task.Task = ComparisonValue;
end;
{ TScheduledTask.TWithState }
function TScheduledTask.TWithState.Matches(const Task: TScheduledTask): TBoolean;
begin
Result := Task.State = ComparisonValue;
end;
end.
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