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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
* Copyright (C) 2010 Djellel Eddine Difallah
*
* 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 <config.h>
#include <drizzled/plugin/query_cache.h>
#include <drizzled/errmsg_print.h>
#include <drizzled/gettext.h>
#include <algorithm>
#include <vector>
namespace drizzled {
typedef std::vector<plugin::QueryCache *> QueryCaches;
QueryCaches all_query_cache;
/* Namespaces are here to prevent global symbol clashes with these classes */
class IsCachedIterate
: public std::unary_function<plugin::QueryCache *, bool>
{
Session *session;
public:
IsCachedIterate(Session* session_arg) :
std::unary_function<plugin::QueryCache *, bool>(),
session(session_arg) { }
inline result_type operator()(argument_type handler)
{
return handler->doIsCached(session);
}
};
bool plugin::QueryCache::isCached(Session *session)
{
/* Use find_if instead of foreach so that we can collect return codes */
QueryCaches::iterator iter=
std::find_if(all_query_cache.begin(), all_query_cache.end(),
IsCachedIterate(session));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_query_cache.end();
}
class SendCachedResultsetIterate
: public std::unary_function<plugin::QueryCache *, bool>
{
Session *session;
public:
SendCachedResultsetIterate(Session *session_arg) :
std::unary_function<plugin::QueryCache *, bool>(),
session(session_arg) { }
inline result_type operator()(argument_type handler)
{
return handler->doSendCachedResultset(session);
}
};
bool plugin::QueryCache::sendCachedResultset(Session *session)
{
/* Use find_if instead of foreach so that we can collect return codes */
QueryCaches::iterator iter=
std::find_if(all_query_cache.begin(), all_query_cache.end(),
SendCachedResultsetIterate(session));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_query_cache.end();
}
class PrepareResultsetIterate : public std::unary_function<plugin::QueryCache *, bool>
{
Session *session;
public:
PrepareResultsetIterate(Session *session_arg) :
std::unary_function<plugin::QueryCache *, bool>(),
session(session_arg) { }
inline result_type operator()(argument_type handler)
{
return handler->doPrepareResultset(session);
}
};
bool plugin::QueryCache::prepareResultset(Session *session)
{
/* Use find_if instead of foreach so that we can collect return codes */
QueryCaches::iterator iter=
std::find_if(all_query_cache.begin(), all_query_cache.end(),
PrepareResultsetIterate(session));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_query_cache.end();
}
class SetResultsetIterate : public std::unary_function<plugin::QueryCache *, bool>
{
Session *session;
public:
SetResultsetIterate(Session *session_arg) :
std::unary_function<plugin::QueryCache *, bool>(),
session(session_arg) { }
inline result_type operator()(argument_type handler)
{
return handler->doSetResultset(session);
}
};
bool plugin::QueryCache::setResultset(Session *session)
{
/* Use find_if instead of foreach so that we can collect return codes */
QueryCaches::iterator iter=
std::find_if(all_query_cache.begin(), all_query_cache.end(),
SetResultsetIterate(session));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_query_cache.end();
}
class InsertRecordIterate
: public std::unary_function<plugin::QueryCache *, bool>
{
Session *session;
List<Item> &item;
public:
InsertRecordIterate(Session *session_arg, List<Item> &item_arg) :
std::unary_function<plugin::QueryCache *, bool>(),
session(session_arg), item(item_arg) { }
inline result_type operator()(argument_type handler)
{
return handler->doInsertRecord(session, item);
}
};
bool plugin::QueryCache::insertRecord(Session *session, List<Item> &items)
{
/* Use find_if instead of foreach so that we can collect return codes */
QueryCaches::iterator iter=
std::find_if(all_query_cache.begin(), all_query_cache.end(),
InsertRecordIterate(session, items));
/* If iter is == end() here, that means that all of the plugins returned
* false, which in this case means they all succeeded. Since we want to
* return false on success, we return the value of the two being !=
*/
return iter != all_query_cache.end();
}
bool plugin::QueryCache::addPlugin(plugin::QueryCache *handler)
{
all_query_cache.push_back(handler);
return false;
}
void plugin::QueryCache::removePlugin(plugin::QueryCache *handler)
{
all_query_cache.erase(std::find(all_query_cache.begin(), all_query_cache.end(),
handler));
}
} /* namespace drizzled */
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