icinga2/lib/db_ido_mysql/idomysqlconnection.cpp

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "icinga/perfdatavalue.hpp"
#include "db_ido/dbtype.hpp"
#include "db_ido/dbvalue.hpp"
#include "db_ido_mysql/idomysqlconnection.hpp"
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#include "base/logger.hpp"
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#include "base/objectlock.hpp"
#include "base/convert.hpp"
#include "base/utility.hpp"
#include "base/application.hpp"
#include "base/dynamictype.hpp"
#include "base/exception.hpp"
#include "base/statsfunction.hpp"
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#include <boost/tuple/tuple.hpp>
#include <boost/foreach.hpp>
using namespace icinga;
#define SCHEMA_VERSION "1.12.0"
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REGISTER_TYPE(IdoMysqlConnection);
REGISTER_STATSFUNCTION(IdoMysqlConnectionStats, &IdoMysqlConnection::StatsFunc);
IdoMysqlConnection::IdoMysqlConnection(void)
: m_Connected(false)
{ }
Value IdoMysqlConnection::StatsFunc(const Dictionary::Ptr& status, const Array::Ptr& perfdata)
{
Dictionary::Ptr nodes = new Dictionary();
BOOST_FOREACH(const IdoMysqlConnection::Ptr& idomysqlconnection, DynamicType::GetObjectsByType<IdoMysqlConnection>()) {
size_t items = idomysqlconnection->m_QueryQueue.GetLength();
Dictionary::Ptr stats = new Dictionary();
stats->Set("version", SCHEMA_VERSION);
stats->Set("instance_name", idomysqlconnection->GetInstanceName());
stats->Set("query_queue_items", items);
nodes->Set(idomysqlconnection->GetName(), stats);
perfdata->Add(new PerfdataValue("idomysqlconnection_" + idomysqlconnection->GetName() + "_query_queue_items", items));
}
status->Set("idomysqlconnection", nodes);
return 0;
}
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void IdoMysqlConnection::Resume(void)
{
DbConnection::Resume();
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m_Connected = false;
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m_QueryQueue.SetExceptionCallback(boost::bind(&IdoMysqlConnection::ExceptionHandler, this, _1));
m_TxTimer = new Timer();
m_TxTimer->SetInterval(1);
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m_TxTimer->OnTimerExpired.connect(boost::bind(&IdoMysqlConnection::TxTimerHandler, this));
m_TxTimer->Start();
m_ReconnectTimer = new Timer();
m_ReconnectTimer->SetInterval(10);
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m_ReconnectTimer->OnTimerExpired.connect(boost::bind(&IdoMysqlConnection::ReconnectTimerHandler, this));
m_ReconnectTimer->Start();
m_ReconnectTimer->Reschedule(0);
ASSERT(mysql_thread_safe());
}
void IdoMysqlConnection::Pause(void)
{
m_ReconnectTimer.reset();
DbConnection::Pause();
m_QueryQueue.Enqueue(boost::bind(&IdoMysqlConnection::Disconnect, this));
m_QueryQueue.Join();
}
void IdoMysqlConnection::ExceptionHandler(boost::exception_ptr exp)
{
Log(LogCritical, "IdoMysqlConnection", "Exception during database operation: Verify that your database is operational!");
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Log(LogDebug, "IdoMysqlConnection")
<< "Exception during database operation: " << DiagnosticInformation(exp);
boost::mutex::scoped_lock lock(m_ConnectionMutex);
if (m_Connected) {
mysql_close(&m_Connection);
m_Connected = false;
}
}
void IdoMysqlConnection::AssertOnWorkQueue(void)
{
ASSERT(boost::this_thread::get_id() == m_QueryQueue.GetThreadId());
}
void IdoMysqlConnection::Disconnect(void)
{
AssertOnWorkQueue();
boost::mutex::scoped_lock lock(m_ConnectionMutex);
if (!m_Connected)
return;
Query("COMMIT");
mysql_close(&m_Connection);
m_Connected = false;
}
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void IdoMysqlConnection::TxTimerHandler(void)
{
m_QueryQueue.Enqueue(boost::bind(&IdoMysqlConnection::NewTransaction, this), true);
}
void IdoMysqlConnection::NewTransaction(void)
{
boost::mutex::scoped_lock lock(m_ConnectionMutex);
if (!m_Connected)
return;
Query("COMMIT");
Query("BEGIN");
}
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void IdoMysqlConnection::ReconnectTimerHandler(void)
{
m_QueryQueue.Enqueue(boost::bind(&IdoMysqlConnection::Reconnect, this));
}
void IdoMysqlConnection::Reconnect(void)
{
AssertOnWorkQueue();
CONTEXT("Reconnecting to MySQL IDO database '" + GetName() + "'");
std::vector<DbObject::Ptr> active_dbobjs;
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{
boost::mutex::scoped_lock lock(m_ConnectionMutex);
bool reconnect = false;
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if (m_Connected) {
/* Check if we're really still connected */
if (mysql_ping(&m_Connection) == 0)
return;
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mysql_close(&m_Connection);
m_Connected = false;
reconnect = true;
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}
ClearIDCache();
String ihost, isocket_path, iuser, ipasswd, idb;
const char *host, *socket_path, *user , *passwd, *db;
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long port;
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ihost = GetHost();
isocket_path = GetSocketPath();
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iuser = GetUser();
ipasswd = GetPassword();
idb = GetDatabase();
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host = (!ihost.IsEmpty()) ? ihost.CStr() : NULL;
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port = GetPort();
socket_path = (!isocket_path.IsEmpty()) ? isocket_path.CStr() : NULL;
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user = (!iuser.IsEmpty()) ? iuser.CStr() : NULL;
passwd = (!ipasswd.IsEmpty()) ? ipasswd.CStr() : NULL;
db = (!idb.IsEmpty()) ? idb.CStr() : NULL;
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/* connection */
if (!mysql_init(&m_Connection)) {
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Log(LogCritical, "IdoMysqlConnection")
<< "mysql_init() failed: \"" << mysql_error(&m_Connection) << "\"";
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BOOST_THROW_EXCEPTION(std::bad_alloc());
}
if (!mysql_real_connect(&m_Connection, host, user, passwd, db, port, socket_path, CLIENT_FOUND_ROWS)) {
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Log(LogCritical, "IdoMysqlConnection")
<< "Connection to database '" << db << "' with user '" << user << "' on '" << host << ":" << port
<< "' failed: \"" << mysql_error(&m_Connection) << "\"";
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BOOST_THROW_EXCEPTION(std::runtime_error(mysql_error(&m_Connection)));
}
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m_Connected = true;
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String dbVersionName = "idoutils";
IdoMysqlResult result = Query("SELECT version FROM " + GetTablePrefix() + "dbversion WHERE name='" + Escape(dbVersionName) + "'");
Dictionary::Ptr row = FetchRow(result);
if (!row) {
Log(LogCritical, "IdoMysqlConnection", "Schema does not provide any valid version! Verify your schema installation.");
Application::Exit(EXIT_FAILURE);
}
DiscardRows(result);
String version = row->Get("version");
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if (Utility::CompareVersion(SCHEMA_VERSION, version) < 0) {
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Log(LogCritical, "IdoMysqlConnection")
<< "Schema version '" << version << "' does not match the required version '"
<< SCHEMA_VERSION << "'! Please check the upgrade documentation.";
Application::Exit(EXIT_FAILURE);
}
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String instanceName = GetInstanceName();
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result = Query("SELECT instance_id FROM " + GetTablePrefix() + "instances WHERE instance_name = '" + Escape(instanceName) + "'");
row = FetchRow(result);
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if (!row) {
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Query("INSERT INTO " + GetTablePrefix() + "instances (instance_name, instance_description) VALUES ('" + Escape(instanceName) + "', '" + Escape(GetInstanceDescription()) + "')");
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m_InstanceID = GetLastInsertID();
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} else {
m_InstanceID = DbReference(row->Get("instance_id"));
}
DiscardRows(result);
Endpoint::Ptr my_endpoint = Endpoint::GetLocalEndpoint();
/* we have an endpoint in a cluster setup, so decide if we can proceed here */
if (my_endpoint && GetHAMode() == HARunOnce) {
/* get the current endpoint writing to programstatus table */
result = Query("SELECT UNIX_TIMESTAMP(status_update_time) AS status_update_time, endpoint_name FROM " +
GetTablePrefix() + "programstatus WHERE instance_id = " + Convert::ToString(m_InstanceID));
row = FetchRow(result);
DiscardRows(result);
String endpoint_name;
if (row)
endpoint_name = row->Get("endpoint_name");
else
Log(LogNotice, "IdoMysqlConnection", "Empty program status table");
/* if we did not write into the database earlier, another instance is active */
if (endpoint_name != my_endpoint->GetName()) {
double status_update_time;
if (row)
status_update_time = row->Get("status_update_time");
else
status_update_time = 0;
double status_update_age = Utility::GetTime() - status_update_time;
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Log(LogNotice, "IdoMysqlConnection")
<< "Last update by '" << endpoint_name << "' was " << status_update_age << "s ago.";
if (status_update_age < GetFailoverTimeout()) {
mysql_close(&m_Connection);
m_Connected = false;
return;
}
/* activate the IDO only, if we're authoritative in this zone */
if (IsPaused()) {
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Log(LogNotice, "IdoMysqlConnection")
<< "Local endpoint '" << my_endpoint->GetName() << "' is not authoritative, bailing out.";
mysql_close(&m_Connection);
m_Connected = false;
return;
}
}
Log(LogNotice, "IdoMysqlConnection", "Enabling IDO connection.");
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}
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Log(LogInformation, "IdoMysqlConnection")
<< "MySQL IDO instance id: " << static_cast<long>(m_InstanceID) << " (schema version: '" + version + "')";
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/* set session time zone to utc */
Query("SET SESSION TIME_ZONE='+00:00'");
/* record connection */
Query("INSERT INTO " + GetTablePrefix() + "conninfo " +
"(instance_id, connect_time, last_checkin_time, agent_name, agent_version, connect_type, data_start_time) VALUES ("
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+ Convert::ToString(static_cast<long>(m_InstanceID)) + ", NOW(), NOW(), 'icinga2 db_ido_mysql', '" + Escape(Application::GetVersion())
+ "', '" + (reconnect ? "RECONNECT" : "INITIAL") + "', NOW())");
/* clear config tables for the initial config dump */
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PrepareDatabase();
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std::ostringstream q1buf;
q1buf << "SELECT object_id, objecttype_id, name1, name2, is_active FROM " + GetTablePrefix() + "objects WHERE instance_id = " << static_cast<long>(m_InstanceID);
result = Query(q1buf.str());
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while ((row = FetchRow(result))) {
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DbType::Ptr dbtype = DbType::GetByID(row->Get("objecttype_id"));
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if (!dbtype)
continue;
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DbObject::Ptr dbobj = dbtype->GetOrCreateObjectByName(row->Get("name1"), row->Get("name2"));
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SetObjectID(dbobj, DbReference(row->Get("object_id")));
SetObjectActive(dbobj, row->Get("is_active"));
if (GetObjectActive(dbobj))
active_dbobjs.push_back(dbobj);
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}
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Query("BEGIN");
}
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UpdateAllObjects();
/* deactivate all deleted configuration objects */
BOOST_FOREACH(const DbObject::Ptr& dbobj, active_dbobjs) {
if (dbobj->GetObject() == NULL) {
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Log(LogNotice, "IdoMysqlConnection")
<< "Deactivate deleted object name1: '" << dbobj->GetName1()
<< "' name2: '" << dbobj->GetName2() + "'.";
DeactivateObject(dbobj);
}
}
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}
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void IdoMysqlConnection::ClearConfigTable(const String& table)
{
Query("DELETE FROM " + GetTablePrefix() + table + " WHERE instance_id = " + Convert::ToString(static_cast<long>(m_InstanceID)));
}
IdoMysqlResult IdoMysqlConnection::Query(const String& query)
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{
AssertOnWorkQueue();
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Log(LogDebug, "IdoMysqlConnection")
<< "Query: " << query;
if (mysql_query(&m_Connection, query.CStr()) != 0) {
std::ostringstream msgbuf;
String message = mysql_error(&m_Connection);
msgbuf << "Error \"" << message << "\" when executing query \"" << query << "\"";
Log(LogCritical, "IdoMysqlConnection", msgbuf.str());
BOOST_THROW_EXCEPTION(
database_error()
<< errinfo_message(mysql_error(&m_Connection))
<< errinfo_database_query(query)
);
}
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m_AffectedRows = mysql_affected_rows(&m_Connection);
MYSQL_RES *result = mysql_use_result(&m_Connection);
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if (!result) {
if (mysql_field_count(&m_Connection) > 0) {
std::ostringstream msgbuf;
String message = mysql_error(&m_Connection);
msgbuf << "Error \"" << message << "\" when executing query \"" << query << "\"";
Log(LogCritical, "IdoMysqlConnection", msgbuf.str());
BOOST_THROW_EXCEPTION(
database_error()
<< errinfo_message(mysql_error(&m_Connection))
<< errinfo_database_query(query)
);
}
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return IdoMysqlResult();
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}
return IdoMysqlResult(result, std::ptr_fun(mysql_free_result));
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}
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DbReference IdoMysqlConnection::GetLastInsertID(void)
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{
AssertOnWorkQueue();
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return DbReference(mysql_insert_id(&m_Connection));
}
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int IdoMysqlConnection::GetAffectedRows(void)
{
AssertOnWorkQueue();
return m_AffectedRows;
}
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String IdoMysqlConnection::Escape(const String& s)
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{
AssertOnWorkQueue();
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size_t length = s.GetLength();
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char *to = new char[s.GetLength() * 2 + 1];
mysql_real_escape_string(&m_Connection, to, s.CStr(), length);
String result = String(to);
delete [] to;
return result;
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}
Dictionary::Ptr IdoMysqlConnection::FetchRow(const IdoMysqlResult& result)
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{
AssertOnWorkQueue();
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MYSQL_ROW row;
MYSQL_FIELD *field;
unsigned long *lengths, i;
row = mysql_fetch_row(result.get());
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if (!row)
return Dictionary::Ptr();
lengths = mysql_fetch_lengths(result.get());
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if (!lengths)
return Dictionary::Ptr();
Dictionary::Ptr dict = new Dictionary();
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mysql_field_seek(result.get(), 0);
for (field = mysql_fetch_field(result.get()), i = 0; field; field = mysql_fetch_field(result.get()), i++)
dict->Set(field->name, String(row[i], row[i] + lengths[i]));
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return dict;
}
void IdoMysqlConnection::DiscardRows(const IdoMysqlResult& result)
{
Dictionary::Ptr row;
while ((row = FetchRow(result)))
; /* empty loop body */
}
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void IdoMysqlConnection::ActivateObject(const DbObject::Ptr& dbobj)
{
boost::mutex::scoped_lock lock(m_ConnectionMutex);
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InternalActivateObject(dbobj);
}
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void IdoMysqlConnection::InternalActivateObject(const DbObject::Ptr& dbobj)
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{
if (!m_Connected)
return;
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DbReference dbref = GetObjectID(dbobj);
std::ostringstream qbuf;
if (!dbref.IsValid()) {
if (!dbobj->GetName2().IsEmpty()) {
qbuf << "INSERT INTO " + GetTablePrefix() + "objects (instance_id, objecttype_id, name1, name2, is_active) VALUES ("
<< static_cast<long>(m_InstanceID) << ", " << dbobj->GetType()->GetTypeID() << ", "
<< "'" << Escape(dbobj->GetName1()) << "', '" << Escape(dbobj->GetName2()) << "', 1)";
} else {
qbuf << "INSERT INTO " + GetTablePrefix() + "objects (instance_id, objecttype_id, name1, is_active) VALUES ("
<< static_cast<long>(m_InstanceID) << ", " << dbobj->GetType()->GetTypeID() << ", "
<< "'" << Escape(dbobj->GetName1()) << "', 1)";
}
Query(qbuf.str());
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SetObjectID(dbobj, GetLastInsertID());
} else {
qbuf << "UPDATE " + GetTablePrefix() + "objects SET is_active = 1 WHERE object_id = " << static_cast<long>(dbref);
Query(qbuf.str());
}
}
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void IdoMysqlConnection::DeactivateObject(const DbObject::Ptr& dbobj)
{
boost::mutex::scoped_lock lock(m_ConnectionMutex);
if (!m_Connected)
return;
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DbReference dbref = GetObjectID(dbobj);
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if (!dbref.IsValid())
return;
std::ostringstream qbuf;
qbuf << "UPDATE " + GetTablePrefix() + "objects SET is_active = 0 WHERE object_id = " << static_cast<long>(dbref);
Query(qbuf.str());
/* Note that we're _NOT_ clearing the db refs via SetReference/SetConfigUpdate/SetStatusUpdate
* because the object is still in the database. */
}
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/* caller must hold m_ConnectionMutex */
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bool IdoMysqlConnection::FieldToEscapedString(const String& key, const Value& value, Value *result)
{
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if (key == "instance_id") {
*result = static_cast<long>(m_InstanceID);
return true;
}
if (key == "notification_id") {
*result = static_cast<long>(GetNotificationInsertID(value));
return true;
}
Value rawvalue = DbValue::ExtractValue(value);
if (rawvalue.IsObjectType<DynamicObject>()) {
DbObject::Ptr dbobjcol = DbObject::GetOrCreateByObject(rawvalue);
if (!dbobjcol) {
*result = 0;
return true;
}
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DbReference dbrefcol;
if (DbValue::IsObjectInsertID(value)) {
dbrefcol = GetInsertID(dbobjcol);
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ASSERT(dbrefcol.IsValid());
} else {
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dbrefcol = GetObjectID(dbobjcol);
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if (!dbrefcol.IsValid()) {
InternalActivateObject(dbobjcol);
dbrefcol = GetObjectID(dbobjcol);
if (!dbrefcol.IsValid())
return false;
}
}
*result = static_cast<long>(dbrefcol);
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} else if (DbValue::IsTimestamp(value)) {
long ts = rawvalue;
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std::ostringstream msgbuf;
msgbuf << "FROM_UNIXTIME(" << ts << ")";
*result = Value(msgbuf.str());
} else if (DbValue::IsTimestampNow(value)) {
*result = "NOW()";
} else {
*result = "'" + Escape(rawvalue) + "'";
}
return true;
}
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void IdoMysqlConnection::ExecuteQuery(const DbQuery& query)
{
ASSERT(query.Category != DbCatInvalid);
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m_QueryQueue.Enqueue(boost::bind(&IdoMysqlConnection::InternalExecuteQuery, this, query, (DbQueryType *)NULL), true);
}
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void IdoMysqlConnection::InternalExecuteQuery(const DbQuery& query, DbQueryType *typeOverride)
{
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boost::mutex::scoped_lock lock(m_ConnectionMutex);
if ((query.Category & GetCategories()) == 0)
return;
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if (!m_Connected)
return;
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std::ostringstream qbuf, where;
int type;
if (query.WhereCriteria) {
where << " WHERE ";
ObjectLock olock(query.WhereCriteria);
Value value;
bool first = true;
BOOST_FOREACH(const Dictionary::Pair& kv, query.WhereCriteria) {
if (!FieldToEscapedString(kv.first, kv.second, &value))
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return;
if (!first)
where << " AND ";
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where << kv.first << " = " << value;
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if (first)
first = false;
}
}
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type = typeOverride ? *typeOverride : query.Type;
bool upsert = false;
if ((type & DbQueryInsert) && (type & DbQueryUpdate)) {
bool hasid = false;
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ASSERT(query.Object);
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if (query.ConfigUpdate)
hasid = GetConfigUpdate(query.Object);
else if (query.StatusUpdate)
hasid = GetStatusUpdate(query.Object);
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if (!hasid)
upsert = true;
type = DbQueryUpdate;
}
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switch (type) {
case DbQueryInsert:
qbuf << "INSERT INTO " << GetTablePrefix() << query.Table;
break;
case DbQueryUpdate:
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qbuf << "UPDATE " << GetTablePrefix() << query.Table << " SET";
break;
case DbQueryDelete:
qbuf << "DELETE FROM " << GetTablePrefix() << query.Table;
break;
default:
ASSERT(!"Invalid query type.");
}
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if (type == DbQueryInsert || type == DbQueryUpdate) {
std::ostringstream colbuf, valbuf;
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ObjectLock olock(query.Fields);
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bool first = true;
BOOST_FOREACH(const Dictionary::Pair& kv, query.Fields) {
Value value;
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if (kv.second.IsEmpty())
continue;
if (!FieldToEscapedString(kv.first, kv.second, &value))
return;
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if (type == DbQueryInsert) {
if (!first) {
colbuf << ", ";
valbuf << ", ";
}
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colbuf << kv.first;
valbuf << value;
} else {
if (!first)
qbuf << ", ";
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qbuf << " " << kv.first << " = " << value;
}
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if (first)
first = false;
}
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if (type == DbQueryInsert)
qbuf << " (" << colbuf.str() << ") VALUES (" << valbuf.str() << ")";
}
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if (type != DbQueryInsert)
qbuf << where.str();
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Query(qbuf.str());
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if (upsert && GetAffectedRows() == 0) {
lock.unlock();
DbQueryType to = DbQueryInsert;
InternalExecuteQuery(query, &to);
return;
}
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if (type == DbQueryInsert && query.Object) {
if (query.ConfigUpdate) {
SetInsertID(query.Object, GetLastInsertID());
SetConfigUpdate(query.Object, true);
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} else if (query.StatusUpdate)
SetStatusUpdate(query.Object, true);
}
if (type == DbQueryInsert && query.Table == "notifications" && query.NotificationObject) { // FIXME remove hardcoded table name
SetNotificationInsertID(query.NotificationObject, GetLastInsertID());
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Log(LogDebug, "IdoMysqlConnection")
<< "saving contactnotification notification_id=" << static_cast<long>(GetLastInsertID());
}
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}
void IdoMysqlConnection::CleanUpExecuteQuery(const String& table, const String& time_column, double max_age)
{
m_QueryQueue.Enqueue(boost::bind(&IdoMysqlConnection::InternalCleanUpExecuteQuery, this, table, time_column, max_age), true);
}
void IdoMysqlConnection::InternalCleanUpExecuteQuery(const String& table, const String& time_column, double max_age)
{
boost::mutex::scoped_lock lock(m_ConnectionMutex);
if (!m_Connected)
return;
Query("DELETE FROM " + GetTablePrefix() + table + " WHERE instance_id = " +
Convert::ToString(static_cast<long>(m_InstanceID)) + " AND " + time_column +
" < FROM_UNIXTIME(" + Convert::ToString(static_cast<long>(max_age)) + ")");
}
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void IdoMysqlConnection::FillIDCache(const DbType::Ptr& type)
{
String query = "SELECT " + type->GetIDColumn() + " AS object_id, " + type->GetTable() + "_id FROM " + GetTablePrefix() + type->GetTable() + "s";
IdoMysqlResult result = Query(query);
Dictionary::Ptr row;
while ((row = FetchRow(result))) {
SetInsertID(type, DbReference(row->Get("object_id")), DbReference(row->Get(type->GetTable() + "_id")));
}
}