#include "common.h"
#include "plugin.h"
#include "utils_avltree.h"
+#include "utils_cache.h"
+#include "utils_threshold.h"
#include <assert.h>
#include <pthread.h>
int values_num;
gauge_t *values_gauge;
counter_t *values_counter;
+ /* Time contained in the package
+ * (for calculating rates) */
+ time_t last_time;
+ /* Time according to the local clock
+ * (for purging old entries) */
time_t last_update;
+ /* Interval in which the data is collected
+ * (for purding old entries) */
+ int interval;
+ int state;
} cache_entry_t;
-static avl_tree_t *cache_tree = NULL;
+static c_avl_tree_t *cache_tree = NULL;
static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
static int cache_compare (const cache_entry_t *a, const cache_entry_t *b)
return (strcmp (a->name, b->name));
} /* int cache_compare */
+static int uc_send_notification (const char *name)
+{
+ cache_entry_t *ce = NULL;
+ int status;
+
+ char *name_copy;
+ char *host;
+ char *plugin;
+ char *plugin_instance;
+ char *type;
+ char *type_instance;
+
+ notification_t n;
+
+ name_copy = strdup (name);
+ if (name_copy == NULL)
+ {
+ ERROR ("uc_send_notification: strdup failed.");
+ return (-1);
+ }
+
+ status = parse_identifier (name_copy, &host,
+ &plugin, &plugin_instance,
+ &type, &type_instance);
+ if (status != 0)
+ {
+ ERROR ("uc_send_notification: Cannot parse name `%s'", name);
+ return (-1);
+ }
+
+ /* Copy the associative members */
+ notification_init (&n, NOTIF_FAILURE, /* host = */ NULL,
+ host, plugin, plugin_instance, type, type_instance);
+
+ sfree (name_copy);
+ name_copy = host = plugin = plugin_instance = type = type_instance = NULL;
+
+ pthread_mutex_lock (&cache_lock);
+
+ /*
+ * Set the time _after_ getting the lock because we don't know how long
+ * acquiring the lock takes and we will use this time later to decide
+ * whether or not the state is OKAY.
+ */
+ n.time = time (NULL);
+
+ status = c_avl_get (cache_tree, name, (void *) &ce);
+ if (status != 0)
+ {
+ pthread_mutex_unlock (&cache_lock);
+ sfree (name_copy);
+ return (-1);
+ }
+
+ /* Check if the entry has been updated in the meantime */
+ if ((n.time - ce->last_update) < (2 * ce->interval))
+ {
+ ce->state = STATE_OKAY;
+ pthread_mutex_unlock (&cache_lock);
+ sfree (name_copy);
+ return (-1);
+ }
+
+ snprintf (n.message, sizeof (n.message),
+ "%s has not been updated for %i seconds.", name,
+ (int) (n.time - ce->last_update));
+
+ pthread_mutex_unlock (&cache_lock);
+
+ n.message[sizeof (n.message) - 1] = '\0';
+ plugin_dispatch_notification (&n);
+
+ return (0);
+} /* int uc_send_notification */
+
int uc_init (void)
{
if (cache_tree == NULL)
- cache_tree = avl_create ((int (*) (const void *, const void *))
+ cache_tree = c_avl_create ((int (*) (const void *, const void *))
cache_compare);
return (0);
} /* int uc_init */
+int uc_check_timeout (void)
+{
+ time_t now;
+ cache_entry_t *ce;
+
+ char **keys = NULL;
+ int keys_len = 0;
+
+ char *key;
+ c_avl_iterator_t *iter;
+ int i;
+
+ pthread_mutex_lock (&cache_lock);
+
+ now = time (NULL);
+
+ /* Build a list of entries to be flushed */
+ iter = c_avl_get_iterator (cache_tree);
+ while (c_avl_iterator_next (iter, (void *) &key, (void *) &ce) == 0)
+ {
+ /* If entry has not been updated, add to `keys' array */
+ if ((now - ce->last_update) >= (2 * ce->interval))
+ {
+ char **tmp;
+
+ tmp = (char **) realloc ((void *) keys,
+ (keys_len + 1) * sizeof (char *));
+ if (tmp == NULL)
+ {
+ ERROR ("uc_purge: realloc failed.");
+ c_avl_iterator_destroy (iter);
+ return (-1);
+ }
+
+ keys = tmp;
+ keys[keys_len] = strdup (key);
+ if (keys[keys_len] == NULL)
+ {
+ ERROR ("uc_check_timeout: strdup failed.");
+ continue;
+ }
+ keys_len++;
+ }
+ } /* while (c_avl_iterator_next) */
+
+ for (i = 0; i < keys_len; i++)
+ {
+ int status;
+
+ status = ut_check_interesting (keys[i]);
+
+ if (status < 0)
+ {
+ ERROR ("uc_check_timeout: ut_check_interesting failed.");
+ sfree (keys[i]);
+ }
+ else if (status == 0) /* ``service'' is uninteresting */
+ {
+ ce = NULL;
+ DEBUG ("uc_check_timeout: %s is missing but ``uninteresting''", keys[i]);
+ status = c_avl_remove (cache_tree, keys[i], (void *) &key, (void *) &ce);
+ if (status != 0)
+ {
+ ERROR ("uc_check_timeout: c_avl_remove (%s) failed.", keys[i]);
+ }
+ sfree (keys[i]);
+ sfree (ce);
+ }
+ else /* (status > 0); ``service'' is interesting */
+ {
+ /*
+ * `keys[i]' is not freed and set to NULL, so that the for-loop below
+ * will send out notifications. There's nothing else to do here.
+ */
+ DEBUG ("uc_check_timeout: %s is missing and ``interesting''", keys[i]);
+ ce->state = STATE_ERROR;
+ }
+ } /* for (keys[i]) */
+
+ c_avl_iterator_destroy (iter);
+
+ pthread_mutex_unlock (&cache_lock);
+
+ for (i = 0; i < keys_len; i++)
+ {
+ if (keys[i] == NULL)
+ continue;
+
+ uc_send_notification (keys[i]);
+ sfree (keys[i]);
+ }
+
+ sfree (keys);
+
+ return (0);
+} /* int uc_check_timeout */
+
int uc_update (const data_set_t *ds, const value_list_t *vl)
{
char name[6 * DATA_MAX_NAME_LEN];
cache_entry_t *ce = NULL;
+ int send_okay_notification = 0;
if (FORMAT_VL (name, sizeof (name), vl, ds) != 0)
{
pthread_mutex_lock (&cache_lock);
- if (avl_get (cache_tree, name, (void *) &ce) == 0)
+ if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
{
int i;
assert (ce != NULL);
assert (ce->values_num == ds->ds_num);
- if (ce->last_update >= vl->time)
+ if (ce->last_time >= vl->time)
{
pthread_mutex_unlock (&cache_lock);
NOTICE ("uc_insert: Value too old: name = %s; value time = %u; "
"last cache update = %u;",
- name, (unsigned int) vl->time, (unsigned int) ce->last_update);
+ name, (unsigned int) vl->time, (unsigned int) ce->last_time);
return (-1);
}
+ if ((ce->last_time + ce->interval) < vl->time)
+ {
+ send_okay_notification = vl->time - ce->last_time;
+ ce->state = STATE_OKAY;
+ }
+
for (i = 0; i < ds->ds_num; i++)
{
if (ds->ds[i].type == DS_TYPE_COUNTER)
}
ce->values_gauge[i] = ((double) diff)
- / ((double) (vl->time - ce->last_update));
+ / ((double) (vl->time - ce->last_time));
ce->values_counter[i] = vl->values[i].counter;
}
else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
DEBUG ("uc_insert: %s: ds[%i] = %lf", name, i, ce->values_gauge[i]);
} /* for (i) */
- ce->last_update = vl->time;
+ ce->last_time = vl->time;
+ ce->last_update = time (NULL);
+ ce->interval = vl->interval;
}
else /* key is not found */
{
}
} /* for (i) */
- ce->last_update = vl->time;
+ ce->last_time = vl->time;
+ ce->last_update = time (NULL);
+ ce->interval = vl->interval;
+ ce->state = STATE_OKAY;
- if (avl_insert (cache_tree, key, ce) != 0)
+ if (c_avl_insert (cache_tree, key, ce) != 0)
{
pthread_mutex_unlock (&cache_lock);
- ERROR ("uc_insert: avl_insert failed.");
+ ERROR ("uc_insert: c_avl_insert failed.");
return (-1);
}
pthread_mutex_unlock (&cache_lock);
+ /* Do not send okay notifications for uninteresting values, i. e. values for
+ * which no threshold is configured. */
+ if (send_okay_notification > 0)
+ {
+ int status;
+
+ status = ut_check_interesting (name);
+ if (status <= 0)
+ send_okay_notification = 0;
+ }
+
+ if (send_okay_notification > 0)
+ {
+ notification_t n;
+ memset (&n, '\0', sizeof (n));
+
+ /* Copy the associative members */
+ NOTIFICATION_INIT_VL (&n, vl, ds);
+
+ n.severity = NOTIF_OKAY;
+ n.time = vl->time;
+
+ snprintf (n.message, sizeof (n.message),
+ "Received a value for %s. It was missing for %i seconds.",
+ name, send_okay_notification);
+ n.message[sizeof (n.message) - 1] = '\0';
+
+ plugin_dispatch_notification (&n);
+ }
+
return (0);
} /* int uc_insert */
pthread_mutex_lock (&cache_lock);
- if (avl_get (cache_tree, name, (void *) &ce) == 0)
+ if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
{
assert (ce != NULL);
assert (ce->values_num == ds->ds_num);
return (ret);
} /* gauge_t *uc_get_rate */
+int uc_get_state (const data_set_t *ds, const value_list_t *vl)
+{
+ char name[6 * DATA_MAX_NAME_LEN];
+ cache_entry_t *ce = NULL;
+ int ret = STATE_ERROR;
+
+ if (FORMAT_VL (name, sizeof (name), vl, ds) != 0)
+ {
+ ERROR ("uc_get_state: FORMAT_VL failed.");
+ return (STATE_ERROR);
+ }
+
+ pthread_mutex_lock (&cache_lock);
+
+ if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
+ {
+ assert (ce != NULL);
+ ret = ce->state;
+ }
+
+ pthread_mutex_unlock (&cache_lock);
+
+ return (ret);
+} /* int uc_get_state */
+
+int uc_set_state (const data_set_t *ds, const value_list_t *vl, int state)
+{
+ char name[6 * DATA_MAX_NAME_LEN];
+ cache_entry_t *ce = NULL;
+ int ret = -1;
+
+ if (state < STATE_OKAY)
+ state = STATE_OKAY;
+ if (state > STATE_ERROR)
+ state = STATE_ERROR;
+
+ if (FORMAT_VL (name, sizeof (name), vl, ds) != 0)
+ {
+ ERROR ("uc_get_state: FORMAT_VL failed.");
+ return (STATE_ERROR);
+ }
+
+ pthread_mutex_lock (&cache_lock);
+
+ if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
+ {
+ assert (ce != NULL);
+ ret = ce->state;
+ ce->state = state;
+ }
+
+ pthread_mutex_unlock (&cache_lock);
+
+ return (ret);
+} /* int uc_set_state */
/* vim: set sw=2 ts=8 sts=2 tw=78 : */
projects / collectd.git / blobdiff