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Replication.cpp
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Replication.cpp
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/*++
Program name:
Апостол CRM
Module Name:
Replication.cpp
Notices:
Replication process
Author:
Copyright (c) Prepodobny Alen
mailto: alienufo@inbox.ru
mailto: ufocomp@gmail.com
--*/
#include "Core.hpp"
#include "Replication.hpp"
//----------------------------------------------------------------------------------------------------------------------
#define SERVICE_APPLICATION_NAME "service"
#define CONFIG_SECTION_NAME "process/Replication"
//----------------------------------------------------------------------------------------------------------------------
#define PG_CONFIG_NAME "helper"
#define PG_LISTEN_NAME "replication"
//----------------------------------------------------------------------------------------------------------------------
extern "C++" {
namespace Apostol {
namespace BackEnd {
namespace api {
void replication_log(CStringList &SQL, unsigned long RelayId, const CString &Source, unsigned int Limit = 500) {
SQL.Add(CString().Format("SELECT row_to_json(r) FROM api.replication_log(%d, %s, %d) AS r;",
RelayId,
PQQuoteLiteral(Source).c_str(),
Limit));
}
void get_replication_log(CStringList &SQL, unsigned long Id) {
SQL.Add(CString().Format("SELECT row_to_json(r) FROM api.replication_log AS r WHERE id = %d;", Id));
}
void add_to_relay_log(CStringList &SQL, const CString &Source, unsigned long Id, const CString &DateTime, const CString &Action,
const CString &Schema, const CString &Name, const CString &Key, const CString &Data, const bool Proxy = false) {
const auto &data = PQQuoteLiteral(Data);
SQL.Add(CString()
.MaxFormatSize(256 + Source.Size() + DateTime.Size() + Action.Size() + Schema.Size() + Name.Size() + Key.Size() + data.Size())
.Format("SELECT * FROM api.add_to_relay_log(%s::text, %d::bigint, %s::timestamptz, %s::char, %s::text, %s::text, %s::jsonb, %s::jsonb, %s);",
PQQuoteLiteral(Source).c_str(),
Id,
PQQuoteLiteral(DateTime).c_str(),
PQQuoteLiteral(Action).c_str(),
PQQuoteLiteral(Schema).c_str(),
PQQuoteLiteral(Name).c_str(),
PQQuoteLiteral(Key).c_str(),
data.c_str(),
Proxy ? "true" : "false"
));
}
void get_max_relay_id(CStringList &SQL, const CString &Source) {
SQL.Add(CString().Format("SELECT api.get_max_relay_id(%s);", PQQuoteLiteral(Source).c_str()));
}
void replication_apply(CStringList &SQL, const CString &Source) {
SQL.Add(CString().Format("SELECT api.replication_apply(%s);", PQQuoteLiteral(Source).c_str()));
}
void replication_apply_relay(CStringList &SQL, const CString &Source, unsigned long Id) {
SQL.Add(CString().Format("SELECT api.replication_apply_relay(%s, %d::bigint);", PQQuoteLiteral(Source).c_str(), Id));
}
}
}
namespace Replication {
//--------------------------------------------------------------------------------------------------------------
//-- CReplicationHandler ---------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------------------------------
CReplicationHandler::CReplicationHandler(CReplicationProcess *AModule, unsigned long ReplicationId,
COnReplicationHandlerEvent && Handler): CPollConnection(AModule->ptrQueueManager()), m_Allow(true) {
m_pModule = AModule;
m_ReplicationId = ReplicationId;
m_Handler = Handler;
AddToQueue();
}
//--------------------------------------------------------------------------------------------------------------
CReplicationHandler::~CReplicationHandler() {
CReplicationHandler::Close();
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationHandler::Close() {
m_Allow = false;
RemoveFromQueue();
}
//--------------------------------------------------------------------------------------------------------------
int CReplicationHandler::AddToQueue() {
return m_pModule->AddToQueue(this);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationHandler::RemoveFromQueue() {
m_pModule->RemoveFromQueue(this);
}
//--------------------------------------------------------------------------------------------------------------
bool CReplicationHandler::Handler() {
if (m_Allow && m_Handler) {
m_Handler(this);
return true;
}
return false;
}
//--------------------------------------------------------------------------------------------------------------
//-- CReplicationProcess ---------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------------------------------
CReplicationProcess::CReplicationProcess(CCustomProcess *AParent, CApplication *AApplication):
inherited(AParent, AApplication, ptCustom, "replication") {
m_RelayId = 0;
m_CheckDate = 0;
m_FixedDate = 0;
m_ApplyDate = 0;
m_ErrorCount = 0;
m_Progress = 0;
m_MaxQueue = Config()->PostgresPollMin();
m_ApplyCount = 0;
m_NeedCheckReplicationLog = false;
m_Mode = rmSlave;
m_Status = psStopped;
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::BeforeRun() {
Application()->Header(Application()->Name() + ": replication process");
Log()->Debug(APP_LOG_DEBUG_CORE, MSG_PROCESS_START, GetProcessName(), Application()->Header().c_str());
InitSignals();
Reload();
SetUser(Config()->User(), Config()->Group());
InitializePQClients(Application()->Title(), 1, Config()->PostgresPollMin());
SigProcMask(SIG_UNBLOCK);
SetTimerInterval(1000);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::AfterRun() {
CApplicationProcess::AfterRun();
PQClientsStop();
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::Run() {
auto &PQClient = PQClientStart(PG_CONFIG_NAME);
while (!sig_exiting) {
Log()->Debug(APP_LOG_DEBUG_EVENT, _T("replication process cycle"));
try {
PQClient.Wait();
} catch (Delphi::Exception::Exception &E) {
Log()->Error(APP_LOG_ERR, 0, "%s", E.what());
}
if (sig_terminate || sig_quit) {
if (sig_quit) {
sig_quit = 0;
Log()->Debug(APP_LOG_DEBUG_EVENT, _T("gracefully shutting down"));
Application()->Header(_T("replication process is shutting down"));
}
if (!sig_exiting) {
sig_exiting = 1;
}
}
if (sig_reconfigure) {
sig_reconfigure = 0;
Log()->Debug(APP_LOG_DEBUG_EVENT, _T("reconfiguring"));
Reload();
}
if (sig_reopen) {
sig_reopen = 0;
Log()->Debug(APP_LOG_DEBUG_EVENT, _T("reopening logs"));
}
}
Log()->Debug(APP_LOG_DEBUG_EVENT, _T("stop replication process"));
}
//--------------------------------------------------------------------------------------------------------------
bool CReplicationProcess::DoExecute(CTCPConnection *AConnection) {
return CModuleProcess::DoExecute(AConnection);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::Reload() {
CServerProcess::Reload();
m_Providers.Clear();
m_Tokens.Clear();
m_QueueManager.Count();
m_ClientManager.Clear();
m_CheckDate = 0;
m_FixedDate = 0;
m_ApplyDate = 0;
m_ErrorCount = 0;
m_Progress = 0;
m_MaxQueue = Config()->PostgresPollMin();
m_ApplyCount = 0;
m_NeedCheckReplicationLog = false;
m_Mode = rmSlave;
m_Status = psStopped;
Config()->IniFile().ReadSectionValues(CONFIG_SECTION_NAME, &m_Config);
if (m_Config["mode"] == "proxy") {
m_Mode = rmProxy;
} else if (m_Config["mode"] == "master") {
m_Mode = rmMaster;
}
m_Source = m_Config["source"];
m_Server = m_Config["server"];
m_Origin = m_Server;
if (m_Source.IsEmpty()) {
m_Source = CApostolModule::GetHostName();
}
const auto &provider = m_Config["provider"];
const auto &application = m_Config["application"];
const auto &oauth2 = m_Config["oauth2"];
m_Tokens.AddPair(provider, CStringList());
LoadOAuth2(oauth2, provider.empty() ? SYSTEM_PROVIDER_NAME : provider, application.empty() ? SERVICE_APPLICATION_NAME : application, m_Providers);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::CreateAccessToken(CProvider &Provider, const CString &Application, CStringList &Tokens) {
auto OnDone = [this, &Provider](CTCPConnection *Sender) {
auto pConnection = dynamic_cast<CHTTPClientConnection *> (Sender);
auto &Reply = pConnection->Reply();
DebugReply(Reply);
if (Reply.Status == CHTTPReply::ok) {
const CJSON Json(Reply.Content);
m_Session = Json["session"].AsString();
m_Secret = Json["secret"].AsString();
m_FixedDate = 0;
m_ErrorCount = 0;
m_Status = psAuthorized;
m_CheckDate = Now() + (CDateTime) 55 / MinsPerDay; // 55 min
Provider.KeyStatus(ksSuccess);
}
return true;
};
auto OnHTTPClient = [this, &Provider](const CLocation &URI) {
Provider.KeyStatus(ksFailed);
return GetClient(URI.hostname, URI.port);
};
CString server_uri(m_Config["auth"]);
const auto &token_uri = Provider.TokenURI(Application);
const auto &service_token = CToken::CreateToken(Provider, Application);
Tokens.Values("service_token", service_token);
if (!token_uri.IsEmpty()) {
CToken::FetchAccessToken(token_uri.front() == '/' ? server_uri + token_uri : token_uri, service_token, OnHTTPClient, OnDone);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::CheckProviders() {
for (int i = 0; i < m_Providers.Count(); i++) {
auto& Provider = m_Providers[i].Value();
for (int j = 0; j < Provider.Applications().Count(); ++j) {
const auto &app = Provider.Applications().Members(j);
if (app["type"].AsString() == "service_account") {
if (Provider.KeyStatus() != ksFetching) {
Provider.KeyStatusTime(Now());
Provider.KeyStatus(ksFetching);
CreateAccessToken(Provider, app.String(), m_Tokens[Provider.Name()]);
}
}
}
}
}
//--------------------------------------------------------------------------------------------------------------
CReplicationClient *CReplicationProcess::GetReplicationClient() {
auto pClient = m_ClientManager.Add(CLocation(m_Server + "/session/" + m_Session));
pClient->Session() = m_Session;
pClient->Secret() = m_Secret;
pClient->ClientName() = GApplication->Title();
pClient->AutoConnect(false);
pClient->AllocateEventHandlers(GetPQClient(PG_CONFIG_NAME));
#if defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE >= 9)
pClient->OnVerbose([this](auto && Sender, auto && AConnection, auto && AFormat, auto && args) { DoVerbose(Sender, AConnection, AFormat, args); });
pClient->OnException([this](auto && AConnection, auto && AException) { DoException(AConnection, AException); });
pClient->OnEventHandlerException([this](auto && AHandler, auto && AException) { DoServerEventHandlerException(AHandler, AException); });
pClient->OnWebSocketError([this](auto && AConnection) { DoWebSocketError(AConnection); });
pClient->OnConnected([this](auto && Sender) { DoClientConnected(Sender); });
pClient->OnDisconnected([this](auto && Sender) { DoClientDisconnected(Sender); });
pClient->OnNoCommandHandler([this](auto && Sender, auto && AData, auto && AConnection) { DoNoCommandHandler(Sender, AData, AConnection); });
pClient->OnMessage([this](auto && Sender, auto && Message) { DoClientMessage(Sender, Message); });
pClient->OnError([this](auto && Sender, int Code, auto && Message) { DoClientError(Sender, Code, Message); });
pClient->OnHeartbeat([this](auto && Sender) { DoClientHeartbeat(Sender); });
pClient->OnTimeOut([this](auto && Sender) { DoClientTimeOut(Sender); });
pClient->OnReplicationLog([this](auto && Sender, auto && Payload) { DoClientReplicationLog(Sender, Payload); });
pClient->OnReplicationCheckLog([this](auto && Sender, auto && Id) { DoClientReplicationCheckLog(Sender, Id); });
pClient->OnReplicationCheckRelay([this](auto && Sender, auto && RelayId) { DoClientReplicationCheckRelay(Sender, RelayId); });
#else
pClient->OnVerbose(std::bind(&CReplicationProcess::DoVerbose, this, _1, _2, _3, _4));
pClient->OnException(std::bind(&CReplicationProcess::DoException, this, _1, _2));
pClient->OnEventHandlerException(std::bind(&CReplicationProcess::DoServerEventHandlerException, this, _1, _2));
pClient->OnWebSocketError(std::bind(&CReplicationProcess::DoWebSocketError, this, _1));
pClient->OnConnected(std::bind(&CReplicationProcess::DoClientConnected, this, _1));
pClient->OnDisconnected(std::bind(&CReplicationProcess::DoClientDisconnected, this, _1));
pClient->OnNoCommandHandler(std::bind(&CReplicationProcess::DoNoCommandHandler, this, _1, _2, _3));
pClient->OnMessage(std::bind(&CReplicationProcess::DoClientMessage, this, _1, _2));
pClient->OnError(std::bind(&CReplicationProcess::DoClientError, this, _1, _2, _3));
pClient->OnHeartbeat(std::bind(&CReplicationProcess::DoClientHeartbeat, this, _1));
pClient->OnTimeOut(std::bind(&CReplicationProcess::DoClientTimeOut, this, _1));
pClient->OnReplicationLog(std::bind(&CReplicationProcess::DoClientReplicationLog, this, _1, _2));
pClient->OnReplicationCheckLog(std::bind(&CReplicationProcess::DoClientReplicationCheckLog, this, _1, _2));
pClient->OnReplicationCheckRelay(std::bind(&CReplicationProcess::DoClientReplicationCheckRelay, this, _1, _2));
#endif
return pClient;
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::CreateReplicationClient() {
auto pClient = GetReplicationClient();
try {
InitActions(pClient);
pClient->Source() = m_Source;
pClient->Proxy(m_Mode == rmMaster);
pClient->Active(true);
} catch (std::exception &e) {
Log()->Error(APP_LOG_ERR, 0, e.what());
}
}
//--------------------------------------------------------------------------------------------------------------
int CReplicationProcess::AddToQueue(CReplicationHandler *AHandler) {
return m_Queue.AddToQueue(this, AHandler);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::InsertToQueue(int Index, CReplicationHandler *AHandler) {
m_Queue.InsertToQueue(this, Index, AHandler);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::RemoveFromQueue(CReplicationHandler *AHandler) {
m_Queue.RemoveFromQueue(this, AHandler);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::UnloadQueue() {
const auto index = m_Queue.IndexOf(this);
if (index != -1) {
const auto queue = m_Queue[index];
for (int i = 0; i < queue->Count(); ++i) {
auto pHandler = (CReplicationHandler *) queue->Item(i);
if (pHandler != nullptr) {
pHandler->Handler();
if (m_Progress >= m_MaxQueue)
break;
}
}
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DeleteHandler(CReplicationHandler *AHandler) {
delete AHandler;
DecProgress();
UnloadQueue();
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::InitActions(CReplicationClient *AClient) {
#if defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE >= 9)
AClient->Actions().AddObject(_T("/replication"), (CObject *) new CReplicationActionHandler(true , [this](auto && Sender, auto && Request, auto && Response) { OnReplication(Sender, Request, Response); }));
#else
AClient->Actions().AddObject(_T("/replication") , (CObject *) new CReplicationActionHandler(true , std::bind(&CReplicationProcess::OnReplication, this, _1, _2, _3)));
#endif
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::InitServer() {
if (m_ClientManager.Count() == 0) {
CreateReplicationClient();
}
m_FixedDate = 0;
m_Status = Process::psRunning;
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::InitListen() {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
try {
auto pResult = APollQuery->Results(0);
if (pResult->ExecStatus() != PGRES_COMMAND_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
APollQuery->Connection()->Listeners().Add(PG_LISTEN_NAME);
#if defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE >= 9)
APollQuery->Connection()->OnNotify([this](auto && APollQuery, auto && ANotify) { DoPostgresNotify(APollQuery, ANotify); });
#else
APollQuery->Connection()->OnNotify(std::bind(&CReplicationProcess::DoPostgresNotify, this, _1, _2));
#endif
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
CStringList SQL;
SQL.Add("LISTEN " PG_LISTEN_NAME ";");
try {
ExecSQL(SQL, nullptr, OnExecuted, OnException, PG_CONFIG_NAME);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::CheckListen() {
if (!GetPQClient(PG_CONFIG_NAME).CheckListen(PG_LISTEN_NAME))
InitListen();
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::Apply() {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
try {
auto pResult = APollQuery->Results(0);
if (pResult->ExecStatus() != PGRES_TUPLES_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
int count = 0;
if (!pResult->GetIsNull(0, 0)) {
count = StrToInt(pResult->GetValue(0, 0));
}
m_ApplyCount -= count;
if (m_ApplyCount < 0) {
m_ApplyCount = 0;
}
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
CStringList SQL;
api::replication_apply(SQL, m_Origin.Host());
try {
ExecSQL(SQL, nullptr, OnExecuted, OnException);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::ApplyRelay(CWebSocketClientConnection *AConnection, size_t RelayId) {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
try {
auto pConnection = dynamic_cast<CWebSocketClientConnection *> (APollQuery->Binding());
auto pResult = APollQuery->Results(0);
if (pResult->ExecStatus() != PGRES_TUPLES_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
m_ApplyCount--;
if (m_ApplyCount < 0) {
m_ApplyCount = 0;
}
Replication(pConnection);
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
CStringList SQL;
api::replication_apply_relay(SQL, m_Origin.Host(), RelayId);
try {
ExecSQL(SQL, AConnection, OnExecuted, OnException);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::CheckRelayLog(CWebSocketClientConnection *AConnection) {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
try {
auto pConnection = dynamic_cast<CWebSocketClientConnection *> (APollQuery->Binding());
auto pResult = APollQuery->Results(0);
if (pResult->ExecStatus() != PGRES_TUPLES_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
size_t relayId = 0;
if (!pResult->GetIsNull(0, 0)) {
relayId = StrToInt(pResult->GetValue(0, 0));
}
if (m_RelayId < relayId) {
m_RelayId = relayId;
Replication(pConnection);
}
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
CStringList SQL;
api::get_max_relay_id(SQL, m_Origin.Host());
try {
ExecSQL(SQL, AConnection, OnExecuted, OnException);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::Replication(CWebSocketClientConnection *AConnection) const {
if (AConnection != nullptr && AConnection->Connected()) {
auto pClient = dynamic_cast<CReplicationClient *> (AConnection->Client());
pClient->Replication(m_RelayId);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoTimer(CPollEventHandler *AHandler) {
uint64_t exp;
auto pTimer = dynamic_cast<CEPollTimer *> (AHandler->Binding());
pTimer->Read(&exp, sizeof(uint64_t));
try {
Heartbeat(AHandler->TimeStamp());
CModuleProcess::HeartbeatModules(AHandler->TimeStamp());
} catch (Delphi::Exception::Exception &E) {
DoServerEventHandlerException(AHandler, E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoError(const Delphi::Exception::Exception &E) {
m_Session.Clear();
m_Secret.Clear();
m_FixedDate = 0;
m_ApplyDate = 0;
m_ErrorCount++;
m_Status = psStopped;
Log()->Error(APP_LOG_ERR, 0, "%s", E.what());
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoDataBaseError(const Delphi::Exception::Exception &E) {
m_ErrorCount++;
Log()->Error(APP_LOG_ERR, 0, "%s", E.what());
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::OnReplication(CObject *Sender, const CWSMessage &Request, CWSMessage &Response) {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
CPQResult *pResult;
try {
for (int i = 0; i < APollQuery->Count(); i++) {
pResult = APollQuery->Results(i);
if (pResult->ExecStatus() != PGRES_TUPLES_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
}
m_ApplyCount++;
m_ApplyDate = 0;
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
CStringList SQL;
if (Request.Payload.IsObject()) {
const auto &caObject = Request.Payload.Object();
if (caObject["source"].AsString() != m_Source) {
api::add_to_relay_log(SQL, m_Origin.Host(), caObject["id"].AsLong(),
caObject["datetime"].AsString(),
caObject["action"].AsString(), caObject["schema"].AsString(),
caObject["name"].AsString(), caObject["key"].ToString(),
caObject["data"].ToString(), m_Mode >= rmProxy);
}
}
if (SQL.Count() == 0) {
return;
}
try {
ExecSQL(SQL, pClient->Connection(), OnExecuted, OnException);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientReplicationLog(CObject *Sender, const CJSON &Payload) {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
CPQResult *pResult;
int count = 0;
auto pConnection = dynamic_cast<CWebSocketClientConnection *> (APollQuery->Binding());
try {
for (int i = 0; i < APollQuery->Count(); i++) {
pResult = APollQuery->Results(i);
if (pResult->ExecStatus() != PGRES_TUPLES_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
if (!pResult->GetIsNull(0, 0)) {
m_RelayId = StrToInt(pResult->GetValue(0, 0));
count++;
}
}
m_ApplyCount += count;
if (count == 1) {
ApplyRelay(pConnection, m_RelayId);
} else {
Apply();
Replication(pConnection);
}
} catch (Delphi::Exception::Exception &E) {
Apply();
Replication(pConnection);
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
auto Add = [this](CStringList &SQL, const CJSONObject &Object) {
if (Object["source"].AsString() != m_Source) {
api::add_to_relay_log(SQL, m_Origin.Host(), Object["id"].AsLong(), Object["datetime"].AsString(),
Object["action"].AsString(), Object["schema"].AsString(),
Object["name"].AsString(), Object["key"].ToString(),
Object["data"].ToString(), m_Mode >= rmProxy);
}
};
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
CStringList SQL;
if (Payload.IsArray()) {
const auto &caArray = Payload.Array();
for (int i = 0; i < caArray.Count(); i++) {
Add(SQL, caArray[i].Object());
}
} else {
const auto &caObject = Payload.Object();
if (caObject.Count() != 0) {
Add(SQL, caObject);
}
}
if (SQL.Count() == 0) {
pClient->SendGetMaxLog();
return;
}
try {
ExecSQL(SQL, pClient->Connection(), OnExecuted, OnException);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientReplicationCheckLog(CObject *Sender, unsigned long Id) {
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
chASSERT(pClient);
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientReplicationCheckRelay(CObject *Sender, unsigned long RelayId) {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
CPQResult *pResult;
try {
auto pConnection = dynamic_cast<CWebSocketClientConnection *> (APollQuery->Binding());
if (pConnection != nullptr && pConnection->Connected()) {
auto pClient = dynamic_cast<CReplicationClient *> (pConnection->Client());
for (int i = 0; i < APollQuery->Count(); i++) {
pResult = APollQuery->Results(i);
if (pResult->ExecStatus() != PGRES_TUPLES_OK)
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
m_NeedCheckReplicationLog = pResult->nTuples() > 0;
for (int row = 0; row < pResult->nTuples(); row++) {
pClient->SendData(pResult->GetValue(row, 0));
}
}
}
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
DoError(E);
};
if (m_Status == psRunning && m_Mode == rmMaster) {
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
chASSERT(pClient);
CStringList SQL;
api::replication_log(SQL, RelayId, m_Origin.Host());
try {
ExecSQL(SQL, pClient->Connection(), OnExecuted, OnException);
} catch (Delphi::Exception::Exception &E) {
DoError(E);
}
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientHeartbeat(CObject *Sender) {
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
chASSERT(pClient);
if (m_NeedCheckReplicationLog) {
pClient->SendGetMaxRelay();
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientTimeOut(CObject *Sender) {
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
chASSERT(pClient);
m_FixedDate = 0;
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientMessage(CObject *Sender, const CWSMessage &Message) {
auto pClient = dynamic_cast<CReplicationClient *> (Sender);
chASSERT(pClient);
Log()->Message("[%s] [%s] [%s] [%s] %s", pClient->Session().c_str(),
Message.UniqueId.c_str(),
Message.Action.IsEmpty() ? "Unknown" : Message.Action.c_str(),
CWSMessage::MessageTypeIdToString(Message.MessageTypeId).c_str(),
Message.Payload.IsNull() ? "{}" : Message.Payload.ToString().c_str());
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientError(CObject *Sender, int Code, const CString &Message) {
Log()->Error(APP_LOG_ERR, 0, "[%d] %s", Code, Message.c_str());
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientConnected(CObject *Sender) {
auto pConnection = dynamic_cast<CWebSocketClientConnection *>(Sender);
if (pConnection != nullptr) {
auto pBinding = pConnection->Socket()->Binding();
if (pBinding != nullptr) {
Log()->Notice(_T("[%s:%d] [%s] Replication client connected."),
pConnection->Socket()->Binding()->IP(),
pConnection->Socket()->Binding()->Port(),
pConnection->Session().c_str());
} else {
Log()->Notice(_T("[%s] Replication client connected."),
pConnection->Session().c_str());
}
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoClientDisconnected(CObject *Sender) {
auto pConnection = dynamic_cast<CWebSocketClientConnection *>(Sender);
if (pConnection != nullptr) {
auto pBinding = pConnection->Socket()->Binding();
if (pBinding != nullptr) {
Log()->Notice(_T("[%s:%d] [%s] Replication client disconnected."),
pConnection->Socket()->Binding()->IP(),
pConnection->Socket()->Binding()->Port(),
pConnection->Session().c_str());
} else {
Log()->Notice(_T("[%s] Replication client disconnected."),
pConnection->Session().c_str());
}
}
if (m_Session.IsEmpty()) {
m_Status = psAuthorization;
} else {
m_Status = psAuthorized;
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoReplication(CReplicationHandler *AHandler) {
auto OnExecuted = [this](CPQPollQuery *APollQuery) {
auto pHandler = dynamic_cast<CReplicationHandler *> (APollQuery->Binding());
if (pHandler == nullptr) {
return;
}
try {
auto pResult = APollQuery->Results(0);
if (pResult->ExecStatus() != PGRES_TUPLES_OK) {
throw Delphi::Exception::EDBError(pResult->GetErrorMessage());
}
if (!pResult->GetIsNull(0, 0)) {
for (int i = 0; i < m_ClientManager.Count(); ++i) {
auto pClient = m_ClientManager.Items(i);
if (pClient->Active() && pClient->Authorized() && !pClient->Connection()->ClosedGracefully()) {
pClient->SendData(pResult->GetValue(0, 0));
} else {
pClient->Data().Add(pResult->GetValue(0, 0));
}
}
}
} catch (Delphi::Exception::Exception &E) {
DoDataBaseError(E);
}
DeleteHandler(pHandler);
};
auto OnException = [this](CPQPollQuery *APollQuery, const Delphi::Exception::Exception &E) {
auto pHandler = dynamic_cast<CReplicationHandler *> (APollQuery->Binding());
DeleteHandler(pHandler);
DoError(E);
};
CStringList SQL;
api::get_replication_log(SQL, AHandler->ReplicationId());
try {
ExecSQL(SQL, AHandler, OnExecuted, OnException);
AHandler->Allow(false);
IncProgress();
} catch (Delphi::Exception::Exception &E) {
DeleteHandler(AHandler);
DoError(E);
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::DoPostgresNotify(CPQConnection *AConnection, PGnotify *ANotify) {
DebugNotify(AConnection, ANotify);
if (m_Status == psRunning) {
const CJSON Json(ANotify->extra);
if (Json["source"].AsString() != m_Origin.Host()) {
#if defined(_GLIBCXX_RELEASE) && (_GLIBCXX_RELEASE >= 9)
new CReplicationHandler(this, Json["id"].AsLong(), [this](auto &&Handler) { DoReplication(Handler); });
#else
new CReplicationHandler(this, Json["id"].AsLong(), std::bind(&CReplicationProcess::DoReplication, this, _1));
#endif
UnloadQueue();
}
}
}
//--------------------------------------------------------------------------------------------------------------
void CReplicationProcess::Heartbeat(CDateTime Now) {