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/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
*
* 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; version 2 of the
* License.
*
* 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 <sqlite/execute.hpp>
#include <sqlite/query.hpp>
#include <sqlite/database_exception.hpp>
#include <glib.h>
#include "base/string_utilities.h"
#include "base/log.h"
#include "base/file_utilities.h"
#include "base/sqlstring.h"
#include "grt/common.h"
#include "sqlide_generics.h"
using namespace bec;
#include "column_width_cache.h"
DEFAULT_LOG_DOMAIN("column_widths");
ColumnWidthCache::ColumnWidthCache(const std::string &connection_id, const std::string &cache_dir)
: _connection_id(connection_id)
{
_sqconn = new sqlite::connection(make_path(cache_dir, connection_id)+".column_widths");
sqlite::execute(*_sqconn, "PRAGMA temp_store=MEMORY", true);
sqlite::execute(*_sqconn, "PRAGMA synchronous=NORMAL", true);
log_debug2("Using column width cache file %s\n", (make_path(cache_dir, connection_id)+".column_widths").c_str());
// check if the DB is already initialized
sqlite::query q(*_sqconn, "select name from sqlite_master where type='table'");
int found = 0;
if (q.emit())
{
boost::shared_ptr<sqlite::result> res(q.get_result());
do
{
std::string name = res->get_string(0);
if (name == "widths")
found++;
}
while (res->next_row());
}
if (found == 0)
{
log_debug3("Initializing cache\n");
init_db();
}
}
ColumnWidthCache::~ColumnWidthCache()
{
delete _sqconn;
}
void ColumnWidthCache::init_db()
{
std::string code = "create table widths (column_id varchar(100) primary key, width int)";
log_info("Initializing column width cache for %s\n", _connection_id.c_str());
try
{
sqlite::execute(*_sqconn, code, true);
}
catch (std::exception &exc)
{
log_error("Error creating cache %s: %s\n", code.c_str(), exc.what());
}
}
void ColumnWidthCache::save_column_width(const std::string &column_id, int width)
{
try
{
sqlite::query q(*_sqconn, "insert or replace into widths values (?, ?)");
q.bind(1, column_id);
q.bind(2, width);
q.emit();
}
catch (std::exception &exc)
{
log_error("Error storing column width to cache %s: %s\n", column_id.c_str(), exc.what());
}
}
void ColumnWidthCache::save_columns_width(const std::map<std::string, int> &columns)
{
std::map<std::string, int>::const_iterator it;
try
{
sqlide::Sqlite_transaction_guarder transaction(_sqconn);
sqlite::query q(*_sqconn, "insert or replace into widths values (?, ?)");
for(it = columns.begin(); it!= columns.end(); ++it)
{
q.bind(1, it->first);
q.bind(2, it->second);
q.emit();
q.clear();
}
}
catch (std::exception &exc)
{
log_error("Error storing column width to cache %s: %s\n", it->first.c_str(), exc.what());
}
}
int ColumnWidthCache::get_column_width(const std::string &column_id)
{
sqlite::query q(*_sqconn, "select width from widths where column_id = ?");
q.bind(1, column_id);
try
{
if (q.emit())
{
boost::shared_ptr<sqlite::result> res(q.get_result());
return res->get_int(0);
}
}
catch (std::exception &exc)
{
log_error("Error storing column width to cache %s: %s\n", column_id.c_str(), exc.what());
}
return -1;
}
void ColumnWidthCache::delete_column_width(const std::string &column_id)
{
sqlite::query q(*_sqconn, "delete from widths where column_id = ?");
q.bind(1, column_id);
try
{
q.emit();
}
catch (std::exception &exc)
{
log_debug("Error deleting column width to cache %s: %s\n", column_id.c_str(), exc.what());
}
}
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