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/* $%BEGINLICENSE%$
Copyright (c) 2008, 2009, 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
$%ENDLICENSE%$ */
#ifndef __NETWORK_MYSQLD_LUA__
#define __NETWORK_MYSQLD_LUA__
#include <lua.h>
#include "network-backend.h" /* query-status */
#include "network-injection.h" /* query-status */
#include "network-exports.h"
typedef enum {
PROXY_NO_DECISION,
PROXY_SEND_QUERY,
PROXY_SEND_RESULT,
PROXY_SEND_INJECTION,
PROXY_IGNORE_RESULT /** for read_query_result */
} network_mysqld_lua_stmt_ret;
typedef enum {
REGISTER_CALLBACK_SUCCESS,
REGISTER_CALLBACK_LOAD_FAILED,
REGISTER_CALLBACK_EXECUTE_FAILED
} network_mysqld_register_callback_ret;
NETWORK_API int network_mysqld_con_getmetatable(lua_State *L);
NETWORK_API void network_mysqld_lua_init_global_fenv(lua_State *L);
NETWORK_API void network_mysqld_lua_setup_global(lua_State *L, chassis_private *g);
/**
* Encapsulates injected queries information passed back from the a Lua callback function.
*
* @todo Simplify this structure, it should be folded into network_mysqld_con_lua_t.
*/
struct network_mysqld_con_lua_injection {
network_injection_queue *queries; /**< An ordered list of queries we want to have executed. */
int sent_resultset; /**< Flag to make sure we send only one result back to the client. */
};
/**
* Contains extra connection state used for Lua-based plugins.
*/
typedef struct {
struct network_mysqld_con_lua_injection injected; /**< A list of queries to send to the backend.*/
lua_State *L; /**< The Lua interpreter state of the current connection. */
int L_ref; /**< The reference into the lua_scope's registry (a global structure in the Lua interpreter) */
network_backend_t *backend;
int backend_ndx; /**< [lua] index into the backend-array */
gboolean connection_close; /**< [lua] set by the lua code to close a connection */
struct timeval interval; /**< The interval to be used for evt_timer, currently unused. */
struct event evt_timer; /**< The event structure used to implement the timer callback, currently unused. */
gboolean is_reconnecting; /**< if true, critical messages concerning failed connect() calls are suppressed, as they are expected errors */
} network_mysqld_con_lua_t;
NETWORK_API network_mysqld_con_lua_t *network_mysqld_con_lua_new();
NETWORK_API void network_mysqld_con_lua_free(network_mysqld_con_lua_t *st);
/** be sure to include network-mysqld.h */
NETWORK_API network_mysqld_register_callback_ret network_mysqld_con_lua_register_callback(network_mysqld_con *con, const char *lua_script);
NETWORK_API int network_mysqld_con_lua_handle_proxy_response(network_mysqld_con *con, const char *lua_script);
#endif
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