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
158
159
160
161
|
#pragma once
#include "event_field_output.h"
#include <google/protobuf/descriptor.h>
#include <google/protobuf/message.h>
#include <library/cpp/threading/atomic/bool.h>
#include <library/cpp/string_utils/base64/base64.h>
#include <util/generic/map.h>
#include <util/generic/deque.h>
#include <util/generic/singleton.h>
#include <util/string/hex.h>
#include <util/system/guard.h>
#include <util/system/mutex.h>
namespace NProtoBuf {
class TEventFactory {
public:
typedef ::google::protobuf::Message Message;
typedef void (*TEventSerializer)(const Message* event, IOutputStream& output, EFieldOutputFlags flags);
typedef void (*TRegistrationFunc)();
private:
class TFactoryItem {
public:
TFactoryItem(const Message* prototype, const TEventSerializer serializer)
: Prototype_(prototype)
, Serializer_(serializer)
{
}
TStringBuf GetName() const {
return Prototype_->GetDescriptor()->name();
}
Message* Create() const {
return Prototype_->New();
}
void PrintEvent(const Message* event, IOutputStream& out, EFieldOutputFlags flags) const {
(*Serializer_)(event, out, flags);
}
private:
const Message* Prototype_;
const TEventSerializer Serializer_;
};
typedef TMap<size_t, TFactoryItem> TFactoryMap;
public:
TEventFactory()
: FactoryItems_()
{
}
void ScheduleRegistration(TRegistrationFunc func) {
EventRegistrators_.push_back(func);
}
void RegisterEvent(size_t eventId, const Message* prototype, const TEventSerializer serializer) {
FactoryItems_.insert(std::make_pair(eventId, TFactoryItem(prototype, serializer)));
}
size_t IdByName(TStringBuf eventname) {
DelayedRegistration();
for (TFactoryMap::const_iterator it = FactoryItems_.begin(); it != FactoryItems_.end(); ++it) {
if (it->second.GetName() == eventname)
return it->first;
}
ythrow yexception() << "do not know event '" << eventname << "'";
}
TStringBuf NameById(size_t id) {
DelayedRegistration();
TFactoryMap::const_iterator it = FactoryItems_.find(id);
return it != FactoryItems_.end() ? it->second.GetName() : TStringBuf();
}
Message* CreateEvent(size_t eventId) {
DelayedRegistration();
TFactoryMap::const_iterator it = FactoryItems_.find(eventId);
if (it != FactoryItems_.end()) {
return it->second.Create();
}
return nullptr;
}
const TMap<size_t, TFactoryItem>& FactoryItems() {
DelayedRegistration();
return FactoryItems_;
}
void PrintEvent(
size_t eventId,
const Message* event,
IOutputStream& output,
EFieldOutputFlags flags = {}) {
DelayedRegistration();
TFactoryMap::const_iterator it = FactoryItems_.find(eventId);
if (it != FactoryItems_.end()) {
it->second.PrintEvent(event, output, flags);
}
}
static TEventFactory* Instance() {
return Singleton<TEventFactory>();
}
private:
void DelayedRegistration() {
if (!DelayedRegistrationDone_) {
TGuard<TMutex> guard(MutexEventRegistrators_);
Y_UNUSED(guard);
while (!EventRegistrators_.empty()) {
EventRegistrators_.front()();
EventRegistrators_.pop_front();
}
DelayedRegistrationDone_ = true;
}
}
private:
TMap<size_t, TFactoryItem> FactoryItems_;
TDeque<TRegistrationFunc> EventRegistrators_;
NAtomic::TBool DelayedRegistrationDone_ = false;
TMutex MutexEventRegistrators_;
};
template <typename T>
void PrintAsBytes(const T& obj, IOutputStream& output) {
const ui8* b = reinterpret_cast<const ui8*>(&obj);
const ui8* e = b + sizeof(T);
const char* delim = "";
while (b != e) {
output << delim;
output << (int)*b++;
delim = ".";
}
}
template <typename T>
void PrintAsHex(const T& obj, IOutputStream& output) {
output << "0x";
output << HexEncode(&obj, sizeof(T));
}
inline void PrintAsBase64(TStringBuf data, IOutputStream& output) {
if (!data.empty()) {
output << Base64Encode(data);
}
}
}
|
