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DataBaseUtils.cpp
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DataBaseUtils.cpp
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static const char *RcsId = "$Header$";
//+=============================================================================
//
// file : DataBaseUtils.cpp
//
// description : Various utility for the DataBase.
//
// project : TANGO Device Servers
//
// author(s) : A.Gotz, P.Verdier, JL Pons
//
// Copyright (C) : 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013
// European Synchrotron Radiation Facility
// BP 220, Grenoble 38043
// FRANCE
//
// This file is part of Tango.
//
// Tango 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 3 of the License, or
// (at your option) any later version.
//
// Tango 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 Tango. If not, see <http://www.gnu.org/licenses/>.
//
// $Revision$
// $Date$
//
// $HeadURL:$
//
//=============================================================================
#if HAVE_CONFIG_H
#include <ac_config.h>
#endif
#include <tango.h>
#include <DataBase.h>
#include <DataBaseClass.h>
#include <errmsg.h>
#include <stdio.h>
#ifdef _TG_WINDOWS_
#include <ws2tcpip.h>
#else
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#endif
using namespace std;
namespace DataBase_ns {
//+----------------------------------------------------------------------------
//
// method : DataBase::replace_wildcard(char *wildcard_c_str)
//
// description : utility method to replace all occurrences of
// wildcards (*) with SQL wildcards % and to escape
// all occurrences of '%' and '_' with '\'
//
// in : string **wildcard_c_str - wildcard C string
//
// out : void - nothing
//
//-----------------------------------------------------------------------------
string DataBase::replace_wildcard(const char *wildcard_c_str)
{
string wildcard(wildcard_c_str);
string::size_type index;
DEBUG_STREAM << "DataBase::replace_wildcard() wildcard in " << wildcard << endl;
// escape %
index = 0;
while ((index = wildcard.find('%',index)) != string::npos)
{
wildcard.insert(index, 1, '\\');
index = index+2;
}
// escape _
index = 0;
while ((index = wildcard.find('_',index)) != string::npos)
{
wildcard.insert(index, 1, '\\');
index = index+2;
}
// escape "
index = 0;
while ((index = wildcard.find('"',index)) != string::npos)
{
wildcard.insert(index, 1, '\\');
index = index+2;
}
// escape '
index = 0;
while ((index = wildcard.find('\'',index)) != string::npos)
{
wildcard.insert(index, 1, '\\');
index = index+2;
}
// replace wildcard * with %
while ((index = wildcard.find('*')) != string::npos)
{
wildcard.replace(index, 1, 1, '%');
}
DEBUG_STREAM << "DataBase::replace_wildcard() wildcard out " << wildcard << endl;
return wildcard;
}
//+----------------------------------------------------------------------------
//
// method : DataBase::escape_string(char *string_c_str)
//
// description : utility method to escape all occurrences
// of ' and " with '\'
//
// in : const char *string_c_str - C string to be modified.
//
// out : string - The result string .
//
//-----------------------------------------------------------------------------
string DataBase::escape_string(const char *string_c_str)
{
string escaped_string(string_c_str);
string::size_type index;
DEBUG_STREAM << "DataBase::escape_string() string in : " << escaped_string << endl;
// escape bakckslash
index = 0;
while ((index = escaped_string.find('\\',index)) != string::npos)
{
// Check if double backslash already treated by client
string s = escaped_string.substr(index+1);
// Check if another escape sequence treated by client
if (s.find('\"')==0 || s.find('\'')==0)
index++;
else
{
escaped_string.insert(index, 1, '\\');
index += 2;
}
}
// escape "
index = 0;
while ((index = escaped_string.find('"',index)) != string::npos)
{
if (index==0) // Cannot have '\' at -1 !
{
escaped_string.insert(index, 1, '\\');
index += 2;
}
else
{
// Check if double quotes already treated by client
string s = escaped_string.substr(index-1);
if (s.find('\\')==0)
index++;
else
{
escaped_string.insert(index, 1, '\\');
index += 2;
}
}
}
// escape '
index = 0;
while ((index = escaped_string.find('\'',index)) != string::npos)
{
if (index==0) // Cannot have '\' at -1 !
{
escaped_string.insert(index, 1, '\\');
index += 2;
}
else
{
// Check if simple quotes already treated by client
string s = escaped_string.substr(index-1);
if (s.find('\\')==0)
index++;
else
{
escaped_string.insert(index, 1, '\\');
index += 2;
}
}
}
DEBUG_STREAM << "DataBase::escaped_string() wildcard out : " << escaped_string << endl;
return escaped_string;
}
//+----------------------------------------------------------------------------
//
// method : DataBase::device_name_to_dfm(string &device_name,
// char **domain, char **family, char **member)
//
// description : utility function to return domain, family and member
// from device name. Assumes device name has (optional)
// protocol and instance stripped off i.e. conforms
// to domain/family/member
//
// in : char *devname - device name
//
// out : bool - true or false
//
//-----------------------------------------------------------------------------
bool DataBase::device_name_to_dfm(string &devname, char domain[], char family[], char member[])
{
string::size_type index, index2;
DEBUG_STREAM << "DataBase::device_name_to_dfm() device name in " << devname << endl;
index = devname.find('/');
index2 = devname.find('/', index+1);
(devname.substr(0,index)).copy(domain,index);
domain[index] = '\0';
(devname.substr(index+1,index2-index)).copy(family,index2-index);
family[index2-index-1] = '\0';
(devname.substr(index2+1)).copy(member,devname.length()-index2);
member[devname.length()-index2-1] = '\0';
DEBUG_STREAM << "DataBase::device_name_to_dfm() domain/family/member out " << domain << "/" << family << "/" << member << endl;
return true;
}
//+----------------------------------------------------------------------------
//
// method : DataBase::check_device_name(string *device_name)
//
// description : utility function to check whether device name conforms
// to the TANGO naming convention of
//
// [tango!taco:][//instance/]domain/family/member
//
// in : string *device_name - device name
//
// out : bool - true or false
//
//-----------------------------------------------------------------------------
bool DataBase::check_device_name(string &device_name_str)
{
string devname(device_name_str);
string::size_type index, index2;
DEBUG_STREAM << "DataBase::check_device_name(): device_name in " << devname << endl;
// check there are no special characters which could be interpreted
// as wildcards or which are otherwise excluded
if (devname.find('*') != string::npos) return false;
// check protocol - "tango:" | "taco:"
if (devname.substr(0,6) == "tango:")
{
devname.erase(0,6);
}
else
{
if (devname.substr(0,5) == "taco:")
{
devname.erase(0,5);
}
}
// check instance - "//instance/"
if (devname.substr(0,2) == "//")
{
index = devname.find('/',(string::size_type)2);
if (index == 0 || index == string::npos)
{
return false;
}
devname.erase(0,index+1);
}
// check name conforms to "D/F/M"
index = devname.find('/');
index2 = devname.find('/',index+1);
if (index == 0 || index == string::npos || index2 == string::npos ||
index2-index <= 0 || devname.length() - index2 <= 0)
{
return false;
}
device_name_str = devname;
DEBUG_STREAM << "DataBase::check_device_name(): device_name out " << device_name_str << endl;
return true;
}
//+------------------------------------------------------------------
/**
* method: DataBase::init_timing_stats
*
* description: method to initialise the timing statistics variables
* Returns void
*
* @param none
* @return void
*
*/
//+------------------------------------------------------------------
void DataBase::init_timing_stats()
{
TimingStatsStruct new_timing_stats = {0.0, 0.0, 0.0, 0.0, 0.0};
timing_stats_mutex.lock();
timing_stats_map["DbImportDevice"] = new TimingStatsStruct;
timing_stats_map["DbExportDevice"] = new TimingStatsStruct;
timing_stats_map["DbGetHostServerList"] = new TimingStatsStruct;
timing_stats_map["DbGetHostList"] = new TimingStatsStruct;
timing_stats_map["DbGetServerList"] = new TimingStatsStruct;
timing_stats_map["DbGetDevicePropertyList"] = new TimingStatsStruct;
timing_stats_map["DbGetClassPropertyList"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceMemberList"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceFamilyList"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceDomainList"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceProperty"] = new TimingStatsStruct;
timing_stats_map["DbPutDeviceProperty"] = new TimingStatsStruct;
timing_stats_map["DbDeleteDeviceProperty"] = new TimingStatsStruct;
timing_stats_map["DbInfo"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceClassList"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceAttributeProperty"] = new TimingStatsStruct;
timing_stats_map["DbPutDeviceAttributeProperty"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceAttributeProperty2"] = new TimingStatsStruct;
timing_stats_map["DbPutDeviceAttributeProperty2"] = new TimingStatsStruct;
timing_stats_map["DbUnExportServer"] = new TimingStatsStruct;
timing_stats_map["DbGetDeviceExportedList"] = new TimingStatsStruct;
timing_stats_map["DbExportEvent"] = new TimingStatsStruct;
timing_stats_map["DbImportEvent"] = new TimingStatsStruct;
timing_stats_map["DbGetDataForServerCache"] = new TimingStatsStruct;
timing_stats_map["DbPutClassProperty"] = new TimingStatsStruct;
timing_stats_map["DbMySqlSelect"] = new TimingStatsStruct;
timing_stats_map["DbGetDevicePipeProperty"] = new TimingStatsStruct;
timing_stats_map["DbPutDevicePipeProperty"] = new TimingStatsStruct;
timing_stats_size = timing_stats_map.size();
timing_stats_average = new double[timing_stats_size];
timing_stats_minimum = new double[timing_stats_size];
timing_stats_maximum = new double[timing_stats_size];
timing_stats_calls = new double[timing_stats_size];
timing_stats_index = new Tango::DevString[timing_stats_size];
// now loop over map and initialise remaining variables
std::map<std::string,TimingStatsStruct*>::iterator iter;
int i=0;
for (iter = timing_stats_map.begin(); iter != timing_stats_map.end(); iter++)
{
*(iter->second) = new_timing_stats;
timing_stats_index[i] = (char*)malloc(strlen(iter->first.c_str())+1);
strcpy(timing_stats_index[i],iter->first.c_str());
i++;
}
timing_stats_mutex.unlock();
}
//+----------------------------------------------------------------------------
//
// method : DataBase::check_history_tables()
//
// description : Return history id
//
//-----------------------------------------------------------------------------
void DataBase::check_history_tables()
{
TangoSys_MemStream sql_query_stream;
MYSQL_RES *result;
INFO_STREAM << "DataBase::check_history_tables(): entering" << endl;
sql_query_stream.str("");
sql_query_stream << "SELECT count(*) FROM property_device_hist";
DEBUG_STREAM << "DataBase::check_history_tables(): sql_query " << sql_query_stream.str() << endl;
result = query(sql_query_stream.str(),"check_history_tables()");
mysql_free_result(result);
}
//+----------------------------------------------------------------------------
//
// method : DataBase::get_id()
//
// description : Return history id
// In this method, we don't use the classical query()
// method in order to be sure that the UPDATE and the following
// mysql_insert_id() are done using the same MySQL connection
//
//-----------------------------------------------------------------------------
Tango::DevULong64 DataBase::get_id(const char *name,int con_nb)
{
TangoSys_MemStream sql_query;
//
// If no MySQL connection passed to this method,
// get one
//
bool need_release = false;
if (con_nb == -1)
{
con_nb = get_connection();
need_release = true;
}
sql_query.str("");
sql_query << "UPDATE " << name << "_history_id SET id=LAST_INSERT_ID(id+1)";
string tmp_str = sql_query.str();
if (mysql_real_query(conn_pool[con_nb].db, tmp_str.c_str(),tmp_str.length()) != 0)
{
TangoSys_OMemStream o;
WARN_STREAM << "DataBase::get_id() failed to query TANGO database:" << endl;
WARN_STREAM << " query = " << tmp_str << endl;
WARN_STREAM << " (SQL error=" << mysql_error(conn_pool[con_nb].db) << ")" << endl;
o << "Failed to query TANGO database (error=" << mysql_error(conn_pool[con_nb].db) << ")" << ends;
if (need_release == true)
release_connection(con_nb);
Tango::Except::throw_exception((const char *)DB_SQLError,o.str(),(const char *)"DataBase::get_id()");
}
my_ulonglong val = mysql_insert_id(conn_pool[con_nb].db);
if (val == 0)
{
TangoSys_OMemStream o;
o << "Failed to get history id : " << name;
if (need_release == true)
release_connection(con_nb);
Tango::Except::throw_exception((const char *)DB_SQLError,o.str(),(const char *)"DataBase::get_id()");
}
if (need_release == true)
release_connection(con_nb);
return (Tango::DevULong64)val;
}
//+----------------------------------------------------------------------------
//
// method : DataBase::simple_query()
//
// description : Execute a SQL query , ignore the result.
//
//-----------------------------------------------------------------------------
void DataBase::simple_query(string sql_query,const char *method,int con_nb)
{
//
// If no MySQL connection passed to this method,
// get one
//
bool need_release = false;
if (con_nb == -1)
{
con_nb = get_connection();
need_release = true;
}
DEBUG_STREAM << "Using MySQL connection with semaphore " << con_nb << endl;
//
// Call MySQL
//
if (mysql_real_query(conn_pool[con_nb].db, sql_query.c_str(),sql_query.length()) != 0)
{
TangoSys_OMemStream o;
TangoSys_OMemStream o2;
WARN_STREAM << "DataBase::" << method << " failed to query TANGO database:" << endl;
WARN_STREAM << " query = " << sql_query << endl;
WARN_STREAM << " (SQL error=" << mysql_error(conn_pool[con_nb].db) << ")" << endl;
o << "Failed to query TANGO database (error=" << mysql_error(conn_pool[con_nb].db) << ")";
o << "\n.The query was: " << sql_query << ends;
o2 << "DataBase::" << method << ends;
if (need_release == true)
release_connection(con_nb);
Tango::Except::throw_exception((const char *)DB_SQLError,o.str(),o2.str());
}
if (need_release)
release_connection(con_nb);
}
//+----------------------------------------------------------------------------
//
// method : DataBase::query()
//
// description : Execute a SQL query and return the result.
//
//-----------------------------------------------------------------------------
MYSQL_RES *DataBase::query(string sql_query,const char *method,int con_nb)
{
MYSQL_RES *result;
//
// If no MySQL connection passed to this method,
// get one
//
bool need_release = false;
if (con_nb == -1)
{
con_nb = get_connection();
need_release = true;
}
DEBUG_STREAM << "Using MySQL connection with semaphore " << con_nb << endl;
//
// Call MySQL
//
if (mysql_real_query(conn_pool[con_nb].db, sql_query.c_str(),sql_query.length()) != 0)
{
TangoSys_OMemStream o;
TangoSys_OMemStream o2;
WARN_STREAM << "DataBase::" << method << " failed to query TANGO database:" << endl;
WARN_STREAM << " query = " << sql_query << endl;
WARN_STREAM << " (SQL error=" << mysql_error(conn_pool[con_nb].db) << ")" << endl;
o << "Failed to query TANGO database (error=" << mysql_error(conn_pool[con_nb].db) << ")";
o << "\nThe query was: " << sql_query << ends;
o2 << "DataBase::" << method << ends;
if (need_release == true)
release_connection(con_nb);
Tango::Except::throw_exception((const char *)DB_SQLError,o.str(),o2.str());
}
if ((result = mysql_store_result(conn_pool[con_nb].db)) == NULL)
{
TangoSys_OMemStream o;
TangoSys_OMemStream o2;
WARN_STREAM << "DataBase:: " << method << " : mysql_store_result() failed (error=" << mysql_error(conn_pool[con_nb].db) << ")" << endl;
o << "mysql_store_result() failed (error=" << mysql_error(conn_pool[con_nb].db) << ")";
o2 << "DataBase::" << method;
if (need_release == true)
release_connection(con_nb);
Tango::Except::throw_exception((const char *)DB_SQLError,o.str(),o2.str());
}
if (need_release)
release_connection(con_nb);
return result;
}
//+----------------------------------------------------------------------------
//
// method : DataBase::get_connection()
//
// description : Get a MySQl connection from the connection pool
//
//-----------------------------------------------------------------------------
int DataBase::get_connection()
{
//
// Get a MySQL connection and lock it
// If none available, wait for one
//
int loop = 0;
while (conn_pool[loop].the_sema.trywait() == 0)
{
loop++;
if (loop == conn_pool_size)
{
int sem_to_wait;
{
omni_mutex_lock oml(sem_wait_mutex);
sem_to_wait = last_sem_wait++;
if (last_sem_wait == conn_pool_size)
last_sem_wait = 0;
}
loop = sem_to_wait;
WARN_STREAM << "Waiting for one free MySQL connection on semaphore " << loop << endl;
conn_pool[loop].the_sema.wait();
break;
}
}
return loop;
}
//+------------------------------------------------------------------
/**
* method: purge_property()
*
* description: purge a property history table.
*
*/
//+------------------------------------------------------------------
void DataBase::purge_property(const char *table,const char *field,const char *object,const char *name,int con_nb) {
TangoSys_MemStream sql_query;
MYSQL_RES *result;
MYSQL_ROW row2;
sql_query.str("");
sql_query << "SELECT DISTINCT id,date FROM " << table
<< " WHERE " << field << "=\"" << object << "\" AND name=\"" << name
<< "\" ORDER by date";
result = query(sql_query.str(),"purge_property()",con_nb);
int nb_item = mysql_num_rows(result);
if(nb_item>historyDepth) {
// Purge
int toDelete = nb_item-historyDepth;
for(int j=0;j<toDelete;j++) {
row2 = mysql_fetch_row(result);
sql_query.str("");
sql_query << "DELETE FROM " << table << " WHERE id='" << row2[0] << "'";
simple_query(sql_query.str(),"purge_property()",con_nb);
}
}
mysql_free_result(result);
}
//+------------------------------------------------------------------
/**
* method: purge_attribute_property()
*
* description: purge an attribute property history table.
*
*/
//+------------------------------------------------------------------
void DataBase::purge_att_property(const char *table,const char *field,const char *object,const char *attribute,const char *name,int con_nb) {
TangoSys_MemStream sql_query;
MYSQL_RES *result;
MYSQL_ROW row2;
//cout << "purge_att_property(" << object << "," << attribute << "," << name << ")" << endl;
sql_query.str("");
sql_query << "SELECT DISTINCT id,date FROM " << table
<< " WHERE " << field << "=\"" << object << "\" AND name=\"" << name
<< "\" AND attribute=\"" << attribute << "\" ORDER by date";
result = query(sql_query.str(),"purge_att_property()",con_nb);
int nb_item = mysql_num_rows(result);
if(nb_item>historyDepth) {
// Purge
int toDelete = nb_item-historyDepth;
for(int j=0;j<toDelete;j++) {
row2 = mysql_fetch_row(result);
sql_query.str("");
sql_query << "DELETE FROM " << table << " WHERE id='" << row2[0] << "'";
simple_query(sql_query.str(),"purge_att_property()",con_nb);
}
}
mysql_free_result(result);
}
//+------------------------------------------------------------------
/**
* method: purge_pipe_property()
*
* description: purge an pipe property history table.
*
*/
//+------------------------------------------------------------------
void DataBase::purge_pipe_property(const char *table,const char *field,const char *object,const char *pipe,const char *name,int con_nb) {
TangoSys_MemStream sql_query;
MYSQL_RES *result;
MYSQL_ROW row2;
//cout << "purge_pipe_property(" << object << "," << pipe << "," << name << ")" << endl;
sql_query.str("");
sql_query << "SELECT DISTINCT id,date FROM " << table
<< " WHERE " << field << "=\"" << object << "\" AND name=\"" << name
<< "\" AND pipe=\"" << pipe << "\" ORDER by date";
result = query(sql_query.str(),"purge_pipe_property()",con_nb);
int nb_item = mysql_num_rows(result);
if(nb_item>historyDepth) {
// Purge
int toDelete = nb_item-historyDepth;
for(int j=0;j<toDelete;j++) {
row2 = mysql_fetch_row(result);
sql_query.str("");
sql_query << "DELETE FROM " << table << " WHERE id='" << row2[0] << "'";
simple_query(sql_query.str(),"purge_pipe_property()",con_nb);
}
}
mysql_free_result(result);
}
//+------------------------------------------------------------------
/**
* method: base_connect()
*
* description: Basic action to build a Mysql connection
*
*/
//+------------------------------------------------------------------
void DataBase::base_connect(int loop)
{
//
// Initialise mysql database structure and connect to TANGO database
//
conn_pool[loop].db = mysql_init(conn_pool[loop].db);
mysql_options(conn_pool[loop].db,MYSQL_READ_DEFAULT_GROUP,"client");
#if (MYSQL_VERSION_ID > 50000)
//C. Scafuri: auto reconnection has been off since 5.0.3. From 5.0.13 it is possible to set it as an option
// with reconnection enabled DataBase keeps working after timeouts and mysql shutdown/restart
if(mysql_get_client_version() >= 50013)
{
my_bool my_auto_reconnect=1;
if (mysql_options(conn_pool[loop].db,MYSQL_OPT_RECONNECT,&my_auto_reconnect) !=0)
{
ERROR_STREAM << "DataBase: error setting mysql auto reconnection: " << mysql_error(conn_pool[loop].db) << endl;
}
else
{
WARN_STREAM << "DataBase: set mysql auto reconnect to true" << endl;
}
}
#endif
}
//+------------------------------------------------------------------
/**
* method: create_connection_pool()
*
* description: Create the MySQL connections pool
*
*/
//+------------------------------------------------------------------
void DataBase::create_connection_pool(const char *mysql_user,
const char *mysql_password,
const char *mysql_host,
const char *mysql_name)
{
#ifndef HAVE_CONFIG_H
char *database = (char *)"tango";
#else
char *database = (char *)TANGO_DB_NAME;
#endif
//
// Init MySQL db name (locally and as data member)
//
if (mysql_name != NULL)
{
database = const_cast<char *>(mysql_name);
}
mysql_db_name = database;
//
// Check on provided MySQl user and password
//
if (mysql_user != NULL && mysql_password != NULL)
{
WARN_STREAM << "DataBase::create_connection_pool(): mysql database user = " << mysql_user
<< " , password = " << mysql_password << endl;
}
const char *host;
string my_host;
string ho,port;
unsigned int port_num = 0;
if (mysql_host != NULL)
{
my_host = mysql_host;
WARN_STREAM << "DataBase::create_connection_pool(): mysql host = " << mysql_host << endl;
string::size_type pos = my_host.find(':');
if (pos != string::npos)
{
ho = my_host.substr(0,pos);
pos++;
port = my_host.substr(pos);
stringstream ss(port);
ss >> port_num;
if (!ss)
port_num = 0;
host = ho.c_str();
}
else
host = my_host.c_str();
WARN_STREAM << "DataBase::create_connection_pool(): mysql host = " << host << ", port = " << port_num << endl;
}
else
host = NULL;
for (int loop = 0;loop < conn_pool_size;loop++)
{
base_connect(loop);
//
// Inmplement a retry. On some OS (Ubuntu 10.10), it may happens that MySQl needs some time to start.
// This retry should cover this case
// We also have to support case when this server is started while mysql is not ready yet
// (this has been experienced on Ubuntu after a reboot when the ureadahead cache being invalidated
// by a package installing file in /etc/init.d
// Bloody problem!!!
//
WARN_STREAM << "Going to connect to MySQL for conn. " << loop << endl;
if (!mysql_real_connect(conn_pool[loop].db, host, mysql_user, mysql_password, database, port_num, NULL, CLIENT_MULTI_STATEMENTS | CLIENT_FOUND_ROWS))
{
if (loop == 0)
{
int retry = 5;
while (retry > 0)
{
sleep(1);
int db_err = mysql_errno(conn_pool[loop].db);
WARN_STREAM << "Connection to MySQL failed with error " << db_err << endl;
if (db_err == CR_CONNECTION_ERROR || db_err == CR_CONN_HOST_ERROR)
{
mysql_close(conn_pool[loop].db);
conn_pool[loop].db = NULL;
base_connect(loop);
}
WARN_STREAM << "Going to retry to connect to MySQL for connection " << loop << endl;
if (!mysql_real_connect(conn_pool[loop].db, host, mysql_user, mysql_password, database, port_num, NULL, CLIENT_MULTI_STATEMENTS | CLIENT_FOUND_ROWS))
{
WARN_STREAM << "Connection to MySQL (re-try) failed with error " << mysql_errno(conn_pool[loop].db) << endl;
retry--;
if (retry == 0)
{
WARN_STREAM << "Throw exception because no MySQL connection possible after 5 re-tries" << endl;
TangoSys_MemStream out_stream;
out_stream << "Failed to connect to TANGO database (error = " << mysql_error(conn_pool[loop].db) << ")" << ends;
Tango::Except::throw_exception((const char *)"CANNOT_CONNECT_MYSQL",
out_stream.str(),
(const char *)"DataBase::init_device()");
}
}
else
{
WARN_STREAM << "MySQL connection succeed after retry" << endl;
retry = 0;
}
}
}
else
{
WARN_STREAM << "Failed to connect to MySQL for conn. " << loop << ". No re-try in this case" << endl;
TangoSys_MemStream out_stream;
out_stream << "Failed to connect to TANGO database (error = " << mysql_error(conn_pool[loop].db) << ")" << ends;
Tango::Except::throw_exception((const char *)"CANNOT_CONNECT_MYSQL",
out_stream.str(),
(const char *)"DataBase::init_device()");
}
}
}
mysql_svr_version = mysql_get_server_version(conn_pool[0].db);
last_sem_wait = 0;
}
//+------------------------------------------------------------------
/**
* method: host_port_from_ior()
*
* description: Get host and port from a device IOR
*
*/
//+------------------------------------------------------------------
bool DataBase::host_port_from_ior(const char *iorstr,string &h_p)
{
size_t s = (iorstr ? strlen(iorstr) : 0);
if (s < 4)
return false;
const char *p = iorstr;
if (p[0] != 'I' || p[1] != 'O' || p[2] != 'R' || p[3] != ':')
return false;
s = (s - 4) / 2; // how many octets are there in the string
p += 4;
cdrMemoryStream buf((CORBA::ULong)s,0);
for (int i=0; i<(int)s; i++)
{
int j = i*2;
CORBA::Octet v;
if (p[j] >= '0' && p[j] <= '9')
{
v = ((p[j] - '0') << 4);
}
else if (p[j] >= 'a' && p[j] <= 'f')
{
v = ((p[j] - 'a' + 10) << 4);
}
else if (p[j] >= 'A' && p[j] <= 'F')
{
v = ((p[j] - 'A' + 10) << 4);
}
else
return false;
if (p[j+1] >= '0' && p[j+1] <= '9')
{
v += (p[j+1] - '0');
}
else if (p[j+1] >= 'a' && p[j+1] <= 'f')
{
v += (p[j+1] - 'a' + 10);
}
else if (p[j+1] >= 'A' && p[j+1] <= 'F')
{
v += (p[j+1] - 'A' + 10);
}
else
return false;
buf.marshalOctet(v);
}