/*
* Destroy session context.
*/
void pool_session_context_destroy(void)
{
if (session_context)
{
pool_clear_sent_message_list();
free(session_context->message_list.sent_messages);
pool_memory_delete(session_context->memory_context, 0);
if (pool_config->memory_cache_enabled)
{
pool_discard_query_cache_array(session_context->query_cache_array);
session_context->num_selects = 0;
}
if (session_context->query_context)
pool_query_context_destroy(session_context->query_context);
}
/* XXX For now, just zap memory */
memset(&session_context_d, 0, sizeof(session_context_d));
session_context = NULL;
}
/*
* trigger_failover_command: execute specified command at failover.
* command_line is null-terminated string.
*/
static int trigger_failover_command(int node, const char *command_line)
{
int r = 0;
String *exec_cmd;
char port_buf[6];
char buf[2];
BackendInfo *info;
if (command_line == NULL || (strlen(command_line) == 0))
return 0;
/* check nodeID */
if (node < 0 || node > NUM_BACKENDS)
return -1;
info = pool_get_node_info(node);
if (!info)
return -1;
buf[1] = '\0';
pool_memory = pool_memory_create(PREPARE_BLOCK_SIZE);
if (!pool_memory)
{
pool_error("trigger_failover_command: pool_memory_create() failed");
return -1;
}
exec_cmd = init_string("");
while (*command_line)
{
if (*command_line == '%')
{
if (*(command_line + 1))
{
char val = *(command_line + 1);
switch (val)
{
case 'p': /* port */
snprintf(port_buf, sizeof(port_buf), "%d", info->backend_port);
string_append_char(exec_cmd, port_buf);
break;
case 'D': /* database directory */
string_append_char(exec_cmd, info->backend_data_directory);
break;
case 'd': /* node id */
snprintf(port_buf, sizeof(port_buf), "%d", node);
string_append_char(exec_cmd, port_buf);
break;
case 'h': /* host name */
string_append_char(exec_cmd, info->backend_hostname);
break;
case 'm': /* new master node id */
snprintf(port_buf, sizeof(port_buf), "%d", get_next_master_node());
string_append_char(exec_cmd, port_buf);
break;
case 'M': /* old master node id */
snprintf(port_buf, sizeof(port_buf), "%d", MASTER_NODE_ID);
string_append_char(exec_cmd, port_buf);
break;
case '%': /* escape */
string_append_char(exec_cmd, "%");
break;
default: /* ignore */
break;
}
command_line++;
}
} else {
buf[0] = *command_line;
string_append_char(exec_cmd, buf);
}
command_line++;
}
if (strlen(exec_cmd->data) != 0)
{
pool_log("execute command: %s", exec_cmd->data);
r = system(exec_cmd->data);
}
pool_memory_delete(pool_memory, 0);
pool_memory = NULL;
return r;
}
