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quantities_manager.hh
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Thu, May 30, 21:29

quantities_manager.hh
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/*
author : Nicolas RICHART <nicolas.richart@epfl.ch>
*/
#ifndef __BLACKDYNAMITE_QUANTITIES_MANAGER_HH__
#define __BLACKDYNAMITE_QUANTITIES_MANAGER_HH__
#include "blackdynamite.hh"
#include <map>
namespace BlackDynamite {
class SQLConnectionManager;
class QuantitiesManager {
public:
QuantitiesManager(SQLConnectionManager & connection_manager,
const std::string & sql_schema, UInt run_id,
UInt request_retries = 10);
~QuantitiesManager();
/// Get the id associated to a quantity
template <typename T> UInt getQuantityID(const std::string & name);
/// push a quantity in the database
template <typename T>
void pushQuantity(const std::string & name, const T & value, UInt step);
/// push a string quantity in the database
void pushQuantity(const std::string & name, const std::string & value);
private:
typedef std::map<std::string, UInt> quantities_map;
class QueryQuantitiesRetriever;
template <typename T> class QueryCreateQuantity;
protected:
SQLConnectionManager & connection_manager;
UInt run_id;
std::string schema;
quantities_map quantities;
static UInt quantities_manager_counter;
UInt request_retries;
};
}
/* -------------------------------------------------------------------------- */
#include "sql_connection_manager.hh"
#include "common_types.hh"
#include "sql_query.hh"
namespace BlackDynamite {
/* ------------------------------------------------------------------------ */
/* Template implementation */
/* ------------------------------------------------------------------------ */
class QuantitiesManager::QueryQuantitiesRetriever
: public SQLQuery<bd_transaction> {
public:
QueryQuantitiesRetriever(quantities_map & quantities)
: SQLQuery<bd_transaction>("quantities retriever"),
quantities(quantities) {}
protected:
pqxx::result execute(pqxx::transaction_base & trans) {
pqxx::result r = trans.prepared("get_quantities").exec();
for (pqxx::result::size_type i = 0; i < r.size(); ++i) {
const pqxx::result::tuple & t = r[i];
UInt id;
t[0].to(id);
std::string name;
t[1].to(name);
this->quantities[name] = id;
}
return r;
}
protected:
quantities_map & quantities;
};
template <typename T>
class QuantitiesManager::QueryCreateQuantity : public SQLQuery<bd_transaction> {
public:
QueryCreateQuantity(const std::string & name, UInt & id)
: SQLQuery<bd_transaction>(name), id(id) {}
protected:
pqxx::result execute(pqxx::transaction_base & trans) {
bool is_vector = is_std_vector<T>::value;
bool is_integer =
is_vector_of_integer<T>::value || std::is_integral<T>::value;
BLACKDYNAMITE_DEBUG("QuantitiesManager", "Create the quantity " + this->Name());
pqxx::result q = trans.prepared("get_quantity")(this->Name()).exec();
if (q.empty()) {
pqxx::result r =
trans.prepared("create_quantity")(this->Name())(is_integer)(is_vector).exec();
r[0][0].to(this->id);
} else {
q[0][0].to(this->id);
}
return q;
}
protected:
UInt & id;
};
template <typename T>
UInt QuantitiesManager::getQuantityID(const std::string & name) {
quantities_map::const_iterator qit = this->quantities.find(name);
UInt quantity_id;
if (qit == this->quantities.end()) {
QueryCreateQuantity<T> query(name, quantity_id);
this->connection_manager.getConnection().perform(query,
this->request_retries);
this->quantities[name] = quantity_id;
} else {
quantity_id = qit->second;
}
return quantity_id;
}
/* ------------------------------------------------------------------------ */
template <typename T>
void QuantitiesManager::pushQuantity(const std::string & name, const T & value,
UInt step) {
std::string query_name = "push_";
if (is_std_vector<T>::value)
query_name += "vector_";
else
query_name += "scalar_";
if (is_vector_of_integer<T>::value || std::is_integral<T>::value)
query_name += "integer";
else
query_name += "real";
UInt quantity_id = getQuantityID<T>(name);
SQLPreparedQuery<bd_transaction, UInt, T, UInt> query(query_name, quantity_id,
value, step);
this->connection_manager.getConnection().perform(query,
this->request_retries);
}
}
#endif //__BLACKDYNAMITE_QUANTITIES_MANAGER_HH__

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