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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
// Copyright (c) 2015-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <zmq/zmqnotificationinterface.h>
#include <common/args.h>
#include <kernel/chain.h>
#include <logging.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <validationinterface.h>
#include <zmq/zmqabstractnotifier.h>
#include <zmq/zmqpublishnotifier.h>
#include <zmq/zmqutil.h>
#include <zmq.h>
#include <cassert>
#include <map>
#include <string>
#include <utility>
#include <vector>
CZMQNotificationInterface::CZMQNotificationInterface()
{
}
CZMQNotificationInterface::~CZMQNotificationInterface()
{
Shutdown();
}
std::list<const CZMQAbstractNotifier*> CZMQNotificationInterface::GetActiveNotifiers() const
{
std::list<const CZMQAbstractNotifier*> result;
for (const auto& n : notifiers) {
result.push_back(n.get());
}
return result;
}
std::unique_ptr<CZMQNotificationInterface> CZMQNotificationInterface::Create(std::function<bool(CBlock&, const CBlockIndex&)> get_block_by_index)
{
std::map<std::string, CZMQNotifierFactory> factories;
factories["pubhashblock"] = CZMQAbstractNotifier::Create<CZMQPublishHashBlockNotifier>;
factories["pubhashtx"] = CZMQAbstractNotifier::Create<CZMQPublishHashTransactionNotifier>;
factories["pubrawblock"] = [&get_block_by_index]() -> std::unique_ptr<CZMQAbstractNotifier> {
return std::make_unique<CZMQPublishRawBlockNotifier>(get_block_by_index);
};
factories["pubrawtx"] = CZMQAbstractNotifier::Create<CZMQPublishRawTransactionNotifier>;
factories["pubsequence"] = CZMQAbstractNotifier::Create<CZMQPublishSequenceNotifier>;
std::list<std::unique_ptr<CZMQAbstractNotifier>> notifiers;
for (const auto& entry : factories)
{
std::string arg("-zmq" + entry.first);
const auto& factory = entry.second;
for (const std::string& address : gArgs.GetArgs(arg)) {
std::unique_ptr<CZMQAbstractNotifier> notifier = factory();
notifier->SetType(entry.first);
notifier->SetAddress(address);
notifier->SetOutboundMessageHighWaterMark(static_cast<int>(gArgs.GetIntArg(arg + "hwm", CZMQAbstractNotifier::DEFAULT_ZMQ_SNDHWM)));
notifiers.push_back(std::move(notifier));
}
}
if (!notifiers.empty())
{
std::unique_ptr<CZMQNotificationInterface> notificationInterface(new CZMQNotificationInterface());
notificationInterface->notifiers = std::move(notifiers);
if (notificationInterface->Initialize()) {
return notificationInterface;
}
}
return nullptr;
}
// Called at startup to conditionally set up ZMQ socket(s)
bool CZMQNotificationInterface::Initialize()
{
int major = 0, minor = 0, patch = 0;
zmq_version(&major, &minor, &patch);
LogPrint(BCLog::ZMQ, "version %d.%d.%d\n", major, minor, patch);
LogPrint(BCLog::ZMQ, "Initialize notification interface\n");
assert(!pcontext);
pcontext = zmq_ctx_new();
if (!pcontext)
{
zmqError("Unable to initialize context");
return false;
}
for (auto& notifier : notifiers) {
if (notifier->Initialize(pcontext)) {
LogPrint(BCLog::ZMQ, "Notifier %s ready (address = %s)\n", notifier->GetType(), notifier->GetAddress());
} else {
LogPrint(BCLog::ZMQ, "Notifier %s failed (address = %s)\n", notifier->GetType(), notifier->GetAddress());
return false;
}
}
return true;
}
// Called during shutdown sequence
void CZMQNotificationInterface::Shutdown()
{
LogPrint(BCLog::ZMQ, "Shutdown notification interface\n");
if (pcontext)
{
for (auto& notifier : notifiers) {
LogPrint(BCLog::ZMQ, "Shutdown notifier %s at %s\n", notifier->GetType(), notifier->GetAddress());
notifier->Shutdown();
}
zmq_ctx_term(pcontext);
pcontext = nullptr;
}
}
namespace {
template <typename Function>
void TryForEachAndRemoveFailed(std::list<std::unique_ptr<CZMQAbstractNotifier>>& notifiers, const Function& func)
{
for (auto i = notifiers.begin(); i != notifiers.end(); ) {
CZMQAbstractNotifier* notifier = i->get();
if (func(notifier)) {
++i;
} else {
notifier->Shutdown();
i = notifiers.erase(i);
}
}
}
} // anonymous namespace
void CZMQNotificationInterface::UpdatedBlockTip(const CBlockIndex *pindexNew, const CBlockIndex *pindexFork, bool fInitialDownload)
{
if (fInitialDownload || pindexNew == pindexFork) // In IBD or blocks were disconnected without any new ones
return;
TryForEachAndRemoveFailed(notifiers, [pindexNew](CZMQAbstractNotifier* notifier) {
return notifier->NotifyBlock(pindexNew);
});
}
void CZMQNotificationInterface::TransactionAddedToMempool(const CTransactionRef& ptx, uint64_t mempool_sequence)
{
const CTransaction& tx = *ptx;
TryForEachAndRemoveFailed(notifiers, [&tx, mempool_sequence](CZMQAbstractNotifier* notifier) {
return notifier->NotifyTransaction(tx) && notifier->NotifyTransactionAcceptance(tx, mempool_sequence);
});
}
void CZMQNotificationInterface::TransactionRemovedFromMempool(const CTransactionRef& ptx, MemPoolRemovalReason reason, uint64_t mempool_sequence)
{
// Called for all non-block inclusion reasons
const CTransaction& tx = *ptx;
TryForEachAndRemoveFailed(notifiers, [&tx, mempool_sequence](CZMQAbstractNotifier* notifier) {
return notifier->NotifyTransactionRemoval(tx, mempool_sequence);
});
}
void CZMQNotificationInterface::BlockConnected(ChainstateRole role, const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexConnected)
{
if (role == ChainstateRole::BACKGROUND) {
return;
}
for (const CTransactionRef& ptx : pblock->vtx) {
const CTransaction& tx = *ptx;
TryForEachAndRemoveFailed(notifiers, [&tx](CZMQAbstractNotifier* notifier) {
return notifier->NotifyTransaction(tx);
});
}
// Next we notify BlockConnect listeners for *all* blocks
TryForEachAndRemoveFailed(notifiers, [pindexConnected](CZMQAbstractNotifier* notifier) {
return notifier->NotifyBlockConnect(pindexConnected);
});
}
void CZMQNotificationInterface::BlockDisconnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex* pindexDisconnected)
{
for (const CTransactionRef& ptx : pblock->vtx) {
const CTransaction& tx = *ptx;
TryForEachAndRemoveFailed(notifiers, [&tx](CZMQAbstractNotifier* notifier) {
return notifier->NotifyTransaction(tx);
});
}
// Next we notify BlockDisconnect listeners for *all* blocks
TryForEachAndRemoveFailed(notifiers, [pindexDisconnected](CZMQAbstractNotifier* notifier) {
return notifier->NotifyBlockDisconnect(pindexDisconnected);
});
}
std::unique_ptr<CZMQNotificationInterface> g_zmq_notification_interface;
|
