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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2026
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/common.h"
#include "td/utils/Promise.h"
#include "td/utils/Slice.h"
#include "td/utils/Span.h"
#include "td/utils/Status.h"
#include "td/utils/StringBuilder.h"
#include <map>
#include <memory>
#include <utility>
namespace td {
class TQueue {
public:
class EventId {
public:
static constexpr int32 MAX_ID = 2000000000;
EventId();
static Result<EventId> from_int32(int32 id);
bool is_valid() const;
int32 value() const;
Result<EventId> next() const;
Result<EventId> advance(size_t offset) const;
bool empty() const;
bool operator==(const EventId &other) const;
bool operator!=(const EventId &other) const;
bool operator<(const EventId &other) const;
private:
int32 id_{0};
explicit EventId(int32 id);
static bool is_valid_id(int32 id);
};
struct Event {
EventId id;
int32 expires_at{0};
Slice data;
int64 extra{0};
};
struct RawEvent {
uint64 log_event_id{0};
EventId event_id;
int32 expires_at{0};
string data;
int64 extra{0};
};
using QueueId = int64;
class StorageCallback {
public:
using QueueId = TQueue::QueueId;
using RawEvent = TQueue::RawEvent;
StorageCallback() = default;
StorageCallback(const StorageCallback &) = delete;
StorageCallback &operator=(const StorageCallback &) = delete;
StorageCallback(StorageCallback &&) = delete;
StorageCallback &operator=(StorageCallback &&) = delete;
virtual ~StorageCallback() = default;
virtual uint64 push(QueueId queue_id, const RawEvent &event) = 0;
virtual void pop(uint64 log_event_id) = 0;
virtual void close(Promise<> promise) = 0;
virtual void pop_batch(std::vector<uint64> log_event_ids);
};
static unique_ptr<TQueue> create();
TQueue() = default;
TQueue(const TQueue &) = delete;
TQueue &operator=(const TQueue &) = delete;
TQueue(TQueue &&) = delete;
TQueue &operator=(TQueue &&) = delete;
virtual ~TQueue() = default;
virtual void set_callback(unique_ptr<StorageCallback> callback) = 0;
virtual unique_ptr<StorageCallback> extract_callback() = 0;
virtual bool do_push(QueueId queue_id, RawEvent &&raw_event) = 0;
virtual Result<EventId> push(QueueId queue_id, string data, int32 expires_at, int64 extra, EventId hint_new_id) = 0;
virtual void forget(QueueId queue_id, EventId event_id) = 0;
virtual std::map<EventId, RawEvent> clear(QueueId queue_id, size_t keep_count) = 0;
virtual EventId get_head(QueueId queue_id) const = 0;
virtual EventId get_tail(QueueId queue_id) const = 0;
virtual Result<size_t> get(QueueId queue_id, EventId from_id, bool forget_previous, int32 unix_time_now,
MutableSpan<Event> &result_events) = 0;
virtual size_t get_size(QueueId queue_id) const = 0;
// returns number of deleted events and whether garbage collection was completed
virtual std::pair<int64, bool> run_gc(int32 unix_time_now) = 0;
virtual void close(Promise<> promise) = 0;
};
StringBuilder &operator<<(StringBuilder &string_builder, TQueue::EventId id);
struct BinlogEvent;
template <class BinlogT>
class TQueueBinlog final : public TQueue::StorageCallback {
public:
uint64 push(QueueId queue_id, const RawEvent &event) final;
void pop(uint64 log_event_id) final;
void pop_batch(std::vector<uint64> log_event_ids) final;
Status replay(const BinlogEvent &binlog_event, TQueue &q) const TD_WARN_UNUSED_RESULT;
void set_binlog(std::shared_ptr<BinlogT> binlog) {
binlog_ = std::move(binlog);
}
void close(Promise<> promise) final;
private:
std::shared_ptr<BinlogT> binlog_;
static constexpr int32 BINLOG_EVENT_TYPE = 2314;
};
class TQueueMemoryStorage final : public TQueue::StorageCallback {
public:
uint64 push(QueueId queue_id, const RawEvent &event) final;
void pop(uint64 log_event_id) final;
void replay(TQueue &q) const;
void close(Promise<> promise) final;
private:
uint64 next_log_event_id_{1};
std::map<uint64, std::pair<QueueId, RawEvent>> events_;
};
} // namespace td
|
