/**
* swap the server connection with a connection from
* the connection pool
*
* we can only switch backends if we have a authed connection in the pool.
*
* @return NULL if swapping failed
* the new backend on success
*/
network_socket *network_connection_pool_lua_swap(network_mysqld_con *con, int backend_ndx, GHashTable *pwd_table) {
network_backend_t *backend = NULL;
network_socket *send_sock;
network_mysqld_con_lua_t *st = con->plugin_con_state;
// GString empty_username = { "", 0, 0 };
/*
* we can only change to another backend if the backend is already
* in the connection pool and connected
*/
backend = network_backends_get(con->srv->backends, backend_ndx);
if (!backend) return NULL;
/**
* get a connection from the pool which matches our basic requirements
* - username has to match
* - default_db should match
*/
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) check if we have a connection for this user in the pool '%s'", G_STRLOC, con->client->response ? con->client->response->username->str: "empty_user");
#endif
int flag = 0;
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (NULL == (send_sock = network_connection_pool_get(pool))) {
/**
* no connections in the pool
*/
flag = 1;
if (NULL == (send_sock = self_connect(con, backend, pwd_table))) {
st->backend_ndx = -1;
return NULL;
}
}
/* the backend is up and cool, take and move the current backend into the pool */
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) added the previous connection to the pool", G_STRLOC);
#endif
// network_connection_pool_lua_add_connection(con);
/* connect to the new backend */
st->backend = backend;
// st->backend->connected_clients++;
st->backend_ndx = backend_ndx;
if (flag == 0 && !g_atomic_int_compare_and_exchange(&st->backend->connected_clients, 0, 0)) {
g_atomic_int_dec_and_test(&st->backend->connected_clients);
//g_critical("pool_lua_swap:%08x's connected_clients is %d\n", backend, backend->connected_clients);
}
return send_sock;
}
/**
* swap the server connection with a connection from
* the connection pool
*
* we can only switch backends if we have a authed connection in the pool.
*
* @return NULL if swapping failed
* the new backend on success
*/
network_socket *network_connection_pool_lua_swap(network_mysqld_con *con, int backend_ndx) {
network_backend_t *backend = NULL;
network_socket *send_sock;
network_mysqld_con_lua_t *st = con->plugin_con_state;
chassis_private *g = con->srv->priv;
// GString empty_username = { "", 0, 0 };
/*
* we can only change to another backend if the backend is already
* in the connection pool and connected
*/
backend = network_backends_get(g->backends, backend_ndx);
if (!backend) return NULL;
/**
* get a connection from the pool which matches our basic requirements
* - username has to match
* - default_db should match
*/
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) check if we have a connection for this user in the pool '%s'", G_STRLOC, con->client->response ? con->client->response->username->str: "empty_user");
#endif
network_connection_pool* pool = chassis_event_thread_pool(backend);
if (NULL == (send_sock = network_connection_pool_get(pool))) {
/**
* no connections in the pool
*/
if (NULL == (send_sock = self_connect(con, backend))) {
st->backend_ndx = -1;
return NULL;
}
}
/* the backend is up and cool, take and move the current backend into the pool */
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) added the previous connection to the pool", G_STRLOC);
#endif
// network_connection_pool_lua_add_connection(con);
/* connect to the new backend */
st->backend = backend;
// st->backend->connected_clients++;
st->backend_ndx = backend_ndx;
return send_sock;
}
/**
* swap the server connection with a connection from
* the connection pool
*
* we can only switch backends if we have a authed connection in the pool.
*
* @return NULL if swapping failed
* the new backend on success
*/
network_socket* network_connection_pool_lua_swap(network_mysqld_con *con, int backend_ndx, int need_keep_conn, int *err) {
network_backend_t *backend = NULL;
network_socket *send_sock;
network_connection_pool *pool, *second_pool;
network_mysqld_con_lua_t *st = con->plugin_con_state;
chassis_private *g = con->srv->priv;
/*
* we can only change to another backend if the backend is already
* in the connection pool and connected
*/
backend = network_backends_get(g->backends, backend_ndx);
if (!backend) return NULL;
/**
* get a connection from the pool which matches our basic requirements
* - username has to match
* - default_db should match
*/
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) check if we have a connection for this user in the pool '%s'", G_STRLOC, con->client->response ? con->client->response->username->str: "empty_user");
#endif
if(need_keep_conn == 0) {
pool = chassis_event_thread_pool(backend);
send_sock = network_connection_pool_get(pool);
if(send_sock == NULL) {
second_pool = chassis_event_thread_secondpool(backend);
send_sock = network_expiretime_connection_pool_get(second_pool, con);
}
}else {
second_pool = chassis_event_thread_secondpool(backend);
send_sock = network_connection_secondpool_get(second_pool, con);
if(send_sock == NULL) g_message("%s:the connection need keep, but it's not in the pool now.", G_STRLOC);
}
if (NULL == send_sock ) {
/**
* no connections in the pool
*/
if ((con->config->max_connections <= 0) || (backend->connected_clients < con->config->max_connections)) {
if (NULL == (send_sock = self_connect(con, backend))) {
st->backend_ndx = -1;
return NULL;
}
} else {
st->backend_ndx = -1;
*err = -1;
return NULL;
}
}
/* the backend is up and cool, take and move the current backend into the pool */
#ifdef DEBUG_CONN_POOL
g_debug("%s: (swap) added the previous connection to the pool", G_STRLOC);
#endif
/* connect to the new backend */
st->backend = backend;
g_atomic_int_inc(&(st->backend->connected_clients));
st->backend_ndx = backend_ndx;
return send_sock;
}