library/cpp/messagebus/scheduler/scheduler.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68

#pragma once

#include <library/cpp/threading/future/legacy_future.h>

#include <util/datetime/base.h>
#include <util/generic/object_counter.h>
#include <util/generic/ptr.h>
#include <util/generic/vector.h>
#include <util/system/atomic.h>
#include <util/system/condvar.h>
#include <util/system/mutex.h>
#include <util/system/thread.h>

namespace NBus { 
    namespace NPrivate { 
        class IScheduleItem { 
        public: 
            inline IScheduleItem(TInstant scheduleTime) noexcept; 
            virtual ~IScheduleItem() { 
            } 

            virtual void Do() = 0; 
            inline TInstant GetScheduleTime() const noexcept; 

        private: 
            TInstant ScheduleTime; 
        }; 

        using IScheduleItemAutoPtr = TAutoPtr<IScheduleItem>; 

        class TScheduler { 
        public: 
            TScheduler(); 
            ~TScheduler(); 
            void Stop(); 
            void Schedule(TAutoPtr<IScheduleItem> i); 

            size_t Size() const; 

        private: 
            void SchedulerThread(); 

            void FillNextItem(); 

        private: 
            TVector<IScheduleItemAutoPtr> Items; 
            IScheduleItemAutoPtr NextItem; 
            typedef TMutex TLock; 
            TLock Lock; 
            TCondVar CondVar; 

            TObjectCounter<TScheduler> ObjectCounter; 

            bool StopThread; 
            NThreading::TLegacyFuture<> Thread; 
        }; 

        inline IScheduleItem::IScheduleItem(TInstant scheduleTime) noexcept 
            : ScheduleTime(scheduleTime) 
        { 
        } 

        inline TInstant IScheduleItem::GetScheduleTime() const noexcept { 
            return ScheduleTime; 
        } 

    } 
}