/**
* Start the instance of the monitor, returning a handle on the monitor.
*
* This function creates a thread to execute the actual monitoring.
*
* @return A handle to use when interacting with the monitor
*/
static void *
startMonitor(void *arg, void* opt)
{
MONITOR* mon = arg;
GALERA_MONITOR *handle = mon->handle;
CONFIG_PARAMETER* params = (CONFIG_PARAMETER*) opt;
bool have_events = false, script_error = false;
if (handle != NULL)
{
handle->shutdown = 0;
}
else
{
if ((handle = (GALERA_MONITOR *) malloc(sizeof(GALERA_MONITOR))) == NULL)
{
return NULL;
}
handle->shutdown = 0;
handle->id = MONITOR_DEFAULT_ID;
handle->disableMasterFailback = 0;
handle->availableWhenDonor = 0;
handle->disableMasterRoleSetting = 0;
handle->master = NULL;
handle->script = NULL;
handle->use_priority = false;
memset(handle->events, false, sizeof(handle->events));
spinlock_init(&handle->lock);
}
while (params)
{
if (!strcmp(params->name, "disable_master_failback"))
{
handle->disableMasterFailback = config_truth_value(params->value);
}
else if (!strcmp(params->name, "available_when_donor"))
{
handle->availableWhenDonor = config_truth_value(params->value);
}
else if (!strcmp(params->name, "disable_master_role_setting"))
{
handle->disableMasterRoleSetting = config_truth_value(params->value);
}
else if (!strcmp(params->name, "use_priority"))
{
handle->use_priority = config_truth_value(params->value);
}
else if (!strcmp(params->name, "script"))
{
if (externcmd_can_execute(params->value))
{
free(handle->script);
handle->script = strdup(params->value);
}
else
{
script_error = true;
}
}
else if (!strcmp(params->name, "events"))
{
if (mon_parse_event_string((bool*) & handle->events,
sizeof(handle->events), params->value) != 0)
{
script_error = true;
}
else
{
have_events = true;
}
}
params = params->next;
}
if (script_error)
{
MXS_ERROR("Errors were found in the script configuration parameters "
"for the monitor '%s'. The script will not be used.", mon->name);
free(handle->script);
handle->script = NULL;
}
/** If no specific events are given, enable them all */
if (!have_events)
{
memset(handle->events, true, sizeof(handle->events));
}
handle->tid = (THREAD) thread_start(monitorMain, mon);
return handle;
}
/**
* Start the instance of the monitor, returning a handle on the monitor.
*
* This function creates a thread to execute the actual monitoring.
*
* @param arg The current handle - NULL if first start
* @return A handle to use when interacting with the monitor
*/
static void *
startMonitor(void *arg,void* opt)
{
MONITOR* mon = (MONITOR*)arg;
MM_MONITOR *handle = mon->handle;
CONFIG_PARAMETER* params = (CONFIG_PARAMETER*)opt;
bool have_events = false,script_error = false;
if (handle)
{
handle->shutdown = 0;
}
else
{
if ((handle = (MM_MONITOR *)malloc(sizeof(MM_MONITOR))) == NULL)
return NULL;
handle->shutdown = 0;
handle->id = MONITOR_DEFAULT_ID;
handle->master = NULL;
handle->script = NULL;
memset(handle->events,false,sizeof(handle->events));
spinlock_init(&handle->lock);
}
while(params)
{
if(!strcmp(params->name,"detect_stale_master"))
{
handle->detectStaleMaster = config_truth_value(params->value);
}
else if(!strcmp(params->name,"script"))
{
if(handle->script)
{
free(handle->script);
}
if(access(params->value,X_OK) == 0)
{
handle->script = strdup(params->value);
}
else
{
script_error = true;
if(access(params->value,F_OK) == 0)
{
skygw_log_write(LE,
"Error: The file cannot be executed: %s",
params->value);
}
else
{
skygw_log_write(LE,
"Error: The file cannot be found: %s",
params->value);
}
handle->script = NULL;
}
}
else if(!strcmp(params->name,"events"))
{
if(mon_parse_event_string((bool*)&handle->events,sizeof(handle->events),params->value) != 0)
script_error = true;
else
have_events = true;
}
params = params->next;
}
if(script_error)
{
skygw_log_write(LE,"Error: Errors were found in the script configuration parameters "
"for the monitor '%s'. The script will not be used.",mon->name);
free(handle->script);
handle->script = NULL;
}
/** If no specific events are given, enable them all */
if(!have_events)
{
memset(handle->events,true,sizeof(handle->events));
}
handle->tid = (THREAD)thread_start(monitorMain, mon);
return handle;
}
