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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
$%ENDLICENSE%$ */
#include <lua.h>
#include "lua-env.h"
#include "glib-ext.h"
#define C(x) x, sizeof(x) - 1
#define S(x) x->str, x->len
#include "network-backend.h"
#include "network-mysqld.h"
#include "network-conn-pool-lua.h"
#include "network-backend-lua.h"
#include "network-address-lua.h"
#include "network-mysqld-lua.h"
/**
* get the info about a backend
*
* proxy.backend[0].
* connected_clients => clients using this backend
* address => ip:port or unix-path of to the backend
* state => int(BACKEND_STATE_UP|BACKEND_STATE_DOWN)
* type => int(BACKEND_TYPE_RW|BACKEND_TYPE_RO)
*
* @return nil or requested information
* @see backend_state_t backend_type_t
*/
static int proxy_backend_get(lua_State *L) {
network_backend_t *backend = *(network_backend_t **)luaL_checkself(L);
gsize keysize = 0;
const char *key = luaL_checklstring(L, 2, &keysize);
if (strleq(key, keysize, C("connected_clients"))) {
lua_pushinteger(L, backend->connected_clients);
} else if (strleq(key, keysize, C("dst"))) {
network_address_lua_push(L, backend->addr);
} else if (strleq(key, keysize, C("state"))) {
lua_pushinteger(L, backend->state);
} else if (strleq(key, keysize, C("type"))) {
lua_pushinteger(L, backend->type);
} else if (strleq(key, keysize, C("uuid"))) {
if (backend->uuid->len) {
lua_pushlstring(L, S(backend->uuid));
} else {
lua_pushnil(L);
}
} else if (strleq(key, keysize, C("pool"))) {
network_connection_pool *pool;
network_connection_pool **pool_p;
pool_p = lua_newuserdata(L, sizeof(pool));
*pool_p = backend->pool;
network_connection_pool_getmetatable(L);
lua_setmetatable(L, -2);
} else {
lua_pushnil(L);
}
return 1;
}
static int proxy_backend_set(lua_State *L) {
network_backend_t *backend = *(network_backend_t **)luaL_checkself(L);
gsize keysize = 0;
const char *key = luaL_checklstring(L, 2, &keysize);
if (strleq(key, keysize, C("state"))) {
backend->state = lua_tointeger(L, -1);
} else if (strleq(key, keysize, C("uuid"))) {
if (lua_isstring(L, -1)) {
size_t s_len = 0;
const char *s = lua_tolstring(L, -1, &s_len);
g_string_assign_len(backend->uuid, s, s_len);
} else if (lua_isnil(L, -1)) {
g_string_truncate(backend->uuid, 0);
} else {
return luaL_error(L, "proxy.global.backends[...].%s has to be a string", key);
}
} else {
return luaL_error(L, "proxy.global.backends[...].%s is not writable", key);
}
return 1;
}
int network_backend_lua_getmetatable(lua_State *L) {
static const struct luaL_reg methods[] = {
{ "__index", proxy_backend_get },
{ "__newindex", proxy_backend_set },
{ NULL, NULL },
};
return proxy_getmetatable(L, methods);
}
/**
* get proxy.global.backends[ndx]
*
* get the backend from the array of mysql backends.
*
* @return nil or the backend
* @see proxy_backend_get
*/
static int proxy_backends_get(lua_State *L) {
network_backend_t *backend;
network_backend_t **backend_p;
network_backends_t *bs = *(network_backends_t **)luaL_checkself(L);
int backend_ndx = luaL_checkinteger(L, 2) - 1; /** lua is indexes from 1, C from 0 */
/* check that we are in range for a _int_ */
if (NULL == (backend = network_backends_get(bs, backend_ndx))) {
lua_pushnil(L);
return 1;
}
backend_p = lua_newuserdata(L, sizeof(backend)); /* the table underneath proxy.global.backends[ndx] */
*backend_p = backend;
network_backend_lua_getmetatable(L);
lua_setmetatable(L, -2);
return 1;
}
static int proxy_backends_len(lua_State *L) {
network_backends_t *bs = *(network_backends_t **)luaL_checkself(L);
lua_pushinteger(L, network_backends_count(bs));
return 1;
}
int network_backends_lua_getmetatable(lua_State *L) {
static const struct luaL_reg methods[] = {
{ "__index", proxy_backends_get },
{ "__len", proxy_backends_len },
{ NULL, NULL },
};
return proxy_getmetatable(L, methods);
}
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