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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Mark Atwood, Toru Maesaka
*
* 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 <drizzled/server_includes.h>
#include <drizzled/qcache.h>
#include <drizzled/gettext.h>
int qcache_initializer(st_plugin_int *plugin)
{
qcache_t *p;
p= new qcache_t;
if (p == NULL) return 1;
memset(p, 0, sizeof(qcache_t));
plugin->data= (void *)p;
if (plugin->plugin->init)
{
if (plugin->plugin->init((void *)p))
{
errmsg_printf(ERRMSG_LVL_ERROR, _("qcache plugin '%s' init() failed"),
plugin->name.str);
goto err;
}
}
return 0;
err:
delete p;
return 1;
}
int qcache_finalizer(st_plugin_int *plugin)
{
qcache_t *p= (qcache_t *) plugin->data;
if (plugin->plugin->deinit)
{
if (plugin->plugin->deinit((void *)p))
{
errmsg_printf(ERRMSG_LVL_ERROR, _("qcache plugin '%s' deinit() failed"),
plugin->name.str);
}
}
if (p) delete p;
return 0;
}
/*
The plugin_foreach() iterator requires that we convert all the parameters
of a plugin API entry point into a single void pointer, plus the session.
So we need the following structure for qcache_invalidate_db() which requires
multiple arguments.
*/
typedef struct db_invalidation_parms
{
const char *dbname;
bool transactional;
} db_invalidation_parms_t;
/*
Following functions:
qcache_try_fetch_and_send_iterate();
qcache_set_iterate();
qcache_invalidate_table_iterate();
qcache_invalidate_db_iterate();
qcache_flush_iterate();
are called by plugin_foreach() _once_ for each Query Cache plugin.
*/
static bool qcache_try_fetch_and_send_iterate(Session *session,
plugin_ref plugin, void *p)
{
qcache_t *l= plugin_data(plugin, qcache_t *);
bool is_transactional = (bool *)p;
if (l && l->qcache_try_fetch_and_send)
{
if (l->qcache_try_fetch_and_send(session, is_transactional))
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("qcache plugin '%s' try_fetch_and_send() failed"),
(char *)plugin_name(plugin));
return true;
}
}
return false;
}
static bool qcache_set_iterate(Session *session, plugin_ref plugin, void *p)
{
qcache_t *l = plugin_data(plugin, qcache_t *);
bool transactional = (bool *)p;
if (l && l->qcache_set)
{
if (l->qcache_set(session, transactional))
{
errmsg_printf(ERRMSG_LVL_ERROR, _("qcache plugin '%s' set() failed"),
(char *)plugin_name(plugin));
return true;
}
}
return false;
}
static bool qcache_invalidate_table_iterate(Session *session,
plugin_ref plugin, void *p)
{
qcache_t *l = plugin_data(plugin, qcache_t *);
bool transactional = (bool *)p;
if (l && l->qcache_invalidate_table)
{
if (l->qcache_invalidate_table(session, transactional))
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("qcache plugin '%s' invalidate_table() failed"),
(char *)plugin_name(plugin));
return true;
}
}
return false;
}
static bool qcache_invalidate_db_iterate(Session *session,
plugin_ref plugin, void *p)
{
qcache_t *l = plugin_data(plugin, qcache_t *);
db_invalidation_parms_t *parms = (db_invalidation_parms_t *)p;
if (l && l->qcache_invalidate_db)
{
if (l->qcache_invalidate_db(session, parms->dbname, parms->transactional))
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("qcache plugin '%s' invalidate_db() failed"),
(char *)plugin_name(plugin));
return true;
}
}
return false;
}
static bool qcache_flush_iterate(Session *session, plugin_ref plugin, void *p)
{
qcache_t *l = plugin_data(plugin, qcache_t *);
if (p) return true; /* flush has no parameters, return failure */
if (l && l->qcache_flush)
{
if (l->qcache_flush(session))
{
errmsg_printf(ERRMSG_LVL_ERROR, _("qcache plugin '%s' flush() failed"),
(char *)plugin_name(plugin));
return true;
}
}
return false;
}
/*
Following functions:
drizzle_qcache_try_fetch_and_send();
drizzle_qcache_set();
drizzle_qcache_invalidate_table();
drizzle_qcache_invalidate_db();
drizzle_qcache_flush();
are the entry points to the query cache plugin that is called by the
rest of the Drizzle server code.
*/
bool drizzle_qcache_try_fetch_and_send(Session *session, bool transactional)
{
bool foreach_rv;
foreach_rv= plugin_foreach(session,
qcache_try_fetch_and_send_iterate,
DRIZZLE_QCACHE_PLUGIN,
(void *) &transactional);
return foreach_rv;
}
bool drizzle_qcache_set(Session *session, bool transactional)
{
bool foreach_rv;
foreach_rv= plugin_foreach(session,
qcache_set_iterate,
DRIZZLE_QCACHE_PLUGIN,
(void *) &transactional);
return foreach_rv;
}
bool drizzle_qcache_invalidate_table(Session *session, bool transactional)
{
bool foreach_rv;
foreach_rv= plugin_foreach(session,
qcache_invalidate_table_iterate,
DRIZZLE_QCACHE_PLUGIN,
(void *) &transactional);
return foreach_rv;
}
bool drizzle_qcache_invalidate_db(Session *session, const char *dbname,
bool transactional)
{
bool foreach_rv;
db_invalidation_parms_t parms;
/* marshall the parameters */
parms.dbname = dbname;
parms.transactional = transactional;
foreach_rv= plugin_foreach(session,
qcache_invalidate_db_iterate,
DRIZZLE_QCACHE_PLUGIN,
(void *) &parms);
return foreach_rv;
}
bool drizzle_qcache_flush(Session *session)
{
bool foreach_rv;
foreach_rv= plugin_foreach(session,
qcache_flush_iterate,
DRIZZLE_QCACHE_PLUGIN,
NULL);
return foreach_rv;
}
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