2def1914d69614dda6fb0f13c031abc6345d740d
1 /**
2 * collectd - src/statsd.c
3 *
4 * Copyright (C) 2013 Florian octo Forster
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 *
18 * Authors:
19 * Florian octo Forster <octo at collectd.org>
20 */
22 #include "collectd.h"
23 #include "plugin.h"
24 #include "common.h"
25 #include "configfile.h"
26 #include "utils_avltree.h"
27 #include "utils_complain.h"
28 #include "utils_latency.h"
30 #include <pthread.h>
32 #include <sys/types.h>
33 #include <sys/socket.h>
34 #include <netdb.h>
35 #include <poll.h>
37 #ifndef STATSD_DEFAULT_NODE
38 # define STATSD_DEFAULT_NODE NULL
39 #endif
41 #ifndef STATSD_DEFAULT_SERVICE
42 # define STATSD_DEFAULT_SERVICE "8125"
43 #endif
45 enum metric_type_e
46 {
47 STATSD_COUNTER,
48 STATSD_TIMER,
49 STATSD_GAUGE,
50 STATSD_SET
51 };
52 typedef enum metric_type_e metric_type_t;
54 struct statsd_metric_s
55 {
56 metric_type_t type;
57 int64_t value;
58 latency_counter_t *latency;
59 c_avl_tree_t *set;
60 unsigned long updates_num;
61 };
62 typedef struct statsd_metric_s statsd_metric_t;
64 static c_avl_tree_t *metrics_tree = NULL;
65 static pthread_mutex_t metrics_lock = PTHREAD_MUTEX_INITIALIZER;
67 static pthread_t network_thread;
68 static _Bool network_thread_running = 0;
69 static _Bool network_thread_shutdown = 0;
71 static char *conf_node = NULL;
72 static char *conf_service = NULL;
74 static _Bool conf_delete_counters = 0;
75 static _Bool conf_delete_timers = 0;
76 static _Bool conf_delete_gauges = 0;
77 static _Bool conf_delete_sets = 0;
79 static double *conf_timer_percentile = NULL;
80 static size_t conf_timer_percentile_num = 0;
82 /* Must hold metrics_lock when calling this function. */
83 static statsd_metric_t *statsd_metric_lookup_unsafe (char const *name,
84 metric_type_t type)
85 {
86 char const *prefix;
87 char key[DATA_MAX_NAME_LEN + 2];
88 char *key_copy;
89 statsd_metric_t *metric;
90 int status;
92 switch (type)
93 {
94 case STATSD_COUNTER: prefix = "c"; break;
95 case STATSD_TIMER: prefix = "t"; break;
96 case STATSD_GAUGE: prefix = "g"; break;
97 case STATSD_SET: prefix = "s"; break;
98 default: return (NULL);
99 }
101 ssnprintf (key, sizeof (key), "%s:%s", prefix, name);
103 status = c_avl_get (metrics_tree, key, (void *) &metric);
104 if (status == 0)
105 return (metric);
107 key_copy = strdup (key);
108 if (key_copy == NULL)
109 {
110 ERROR ("statsd plugin: strdup failed.");
111 return (NULL);
112 }
114 metric = malloc (sizeof (*metric));
115 if (metric == NULL)
116 {
117 ERROR ("statsd plugin: malloc failed.");
118 sfree (key_copy);
119 return (NULL);
120 }
121 memset (metric, 0, sizeof (*metric));
123 metric->type = type;
124 metric->latency = NULL;
125 metric->set = NULL;
127 status = c_avl_insert (metrics_tree, key_copy, metric);
128 if (status != 0)
129 {
130 ERROR ("statsd plugin: c_avl_insert failed.");
131 sfree (key_copy);
132 sfree (metric);
133 return (NULL);
134 }
136 return (metric);
137 } /* }}} statsd_metric_lookup_unsafe */
139 static int statsd_metric_set (char const *name, int64_t value, /* {{{ */
140 metric_type_t type)
141 {
142 statsd_metric_t *metric;
144 pthread_mutex_lock (&metrics_lock);
146 metric = statsd_metric_lookup_unsafe (name, type);
147 if (metric == NULL)
148 {
149 pthread_mutex_unlock (&metrics_lock);
150 return (-1);
151 }
153 metric->value = value;
154 metric->updates_num++;
156 pthread_mutex_unlock (&metrics_lock);
158 return (0);
159 } /* }}} int statsd_metric_set */
161 static int statsd_metric_add (char const *name, int64_t delta, /* {{{ */
162 metric_type_t type)
163 {
164 statsd_metric_t *metric;
166 pthread_mutex_lock (&metrics_lock);
168 metric = statsd_metric_lookup_unsafe (name, type);
169 if (metric == NULL)
170 {
171 pthread_mutex_unlock (&metrics_lock);
172 return (-1);
173 }
175 metric->value += delta;
176 metric->updates_num++;
178 pthread_mutex_unlock (&metrics_lock);
180 return (0);
181 } /* }}} int statsd_metric_add */
183 static int statsd_handle_counter (char const *name, /* {{{ */
184 char const *value_str,
185 char const *extra)
186 {
187 char key[DATA_MAX_NAME_LEN + 2];
188 value_t value;
189 value_t scale;
190 int status;
192 if ((extra != NULL) && (extra[0] != '@'))
193 return (-1);
195 scale.gauge = 1.0;
196 if (extra != NULL)
197 {
198 status = parse_value (extra + 1, &scale, DS_TYPE_GAUGE);
199 if (status != 0)
200 return (status);
202 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
203 return (-1);
204 }
206 value.derive = 1;
207 status = parse_value (value_str, &value, DS_TYPE_DERIVE);
208 if (status != 0)
209 return (status);
211 if (value.derive < 1)
212 return (-1);
214 ssnprintf (key, sizeof (key), "c:%s", name);
216 return (statsd_metric_add (key,
217 (int64_t) (((gauge_t) value.derive) / scale.gauge),
218 STATSD_COUNTER));
219 } /* }}} int statsd_handle_counter */
221 static int statsd_handle_gauge (char const *name, /* {{{ */
222 char const *value_str)
223 {
224 char key[DATA_MAX_NAME_LEN + 2];
225 value_t value;
226 int status;
228 value.derive = 0;
229 status = parse_value (value_str, &value, DS_TYPE_DERIVE);
230 if (status != 0)
231 return (status);
233 ssnprintf (key, sizeof (key), "g:%s", name);
235 if ((value_str[0] == '+') || (value_str[0] == '-'))
236 return (statsd_metric_add (key, (int64_t) value.derive, STATSD_GAUGE));
237 else
238 return (statsd_metric_set (key, (int64_t) value.derive, STATSD_GAUGE));
239 } /* }}} int statsd_handle_gauge */
241 static int statsd_handle_timer (char const *name, /* {{{ */
242 char const *value_str)
243 {
244 statsd_metric_t *metric;
245 value_t value_ms;
246 cdtime_t value;
247 int status;
249 value_ms.derive = 0;
250 status = parse_value (value_str, &value_ms, DS_TYPE_DERIVE);
251 if (status != 0)
252 return (status);
254 value = MS_TO_CDTIME_T (value_ms.derive);
256 pthread_mutex_lock (&metrics_lock);
258 metric = statsd_metric_lookup_unsafe (name, STATSD_TIMER);
259 if (metric == NULL)
260 {
261 pthread_mutex_unlock (&metrics_lock);
262 return (-1);
263 }
265 if (metric->latency == NULL)
266 metric->latency = latency_counter_create ();
267 if (metric->latency == NULL)
268 {
269 pthread_mutex_unlock (&metrics_lock);
270 return (-1);
271 }
273 latency_counter_add (metric->latency, value);
274 metric->updates_num++;
276 pthread_mutex_unlock (&metrics_lock);
277 return (0);
278 } /* }}} int statsd_handle_timer */
280 static int statsd_handle_set (char const *name, /* {{{ */
281 char const *set_key_orig)
282 {
283 statsd_metric_t *metric = NULL;
284 char *set_key;
285 int status;
287 pthread_mutex_lock (&metrics_lock);
289 metric = statsd_metric_lookup_unsafe (name, STATSD_SET);
290 if (metric == NULL)
291 {
292 pthread_mutex_unlock (&metrics_lock);
293 return (-1);
294 }
296 /* Make sure metric->set exists. */
297 if (metric->set == NULL)
298 metric->set = c_avl_create ((void *) strcmp);
300 if (metric->set == NULL)
301 {
302 pthread_mutex_unlock (&metrics_lock);
303 ERROR ("statsd plugin: c_avl_create failed.");
304 return (-1);
305 }
307 set_key = strdup (set_key_orig);
308 if (set_key == NULL)
309 {
310 pthread_mutex_unlock (&metrics_lock);
311 ERROR ("statsd plugin: strdup failed.");
312 return (-1);
313 }
315 status = c_avl_insert (metric->set, set_key, /* value = */ NULL);
316 if (status < 0)
317 {
318 pthread_mutex_unlock (&metrics_lock);
319 if (status < 0)
320 ERROR ("statsd plugin: c_avl_insert (\"%s\") failed with status %i.",
321 set_key, status);
322 sfree (set_key);
323 return (-1);
324 }
325 else if (status > 0) /* key already exists */
326 {
327 sfree (set_key);
328 }
330 metric->updates_num++;
332 pthread_mutex_unlock (&metrics_lock);
333 return (0);
334 } /* }}} int statsd_handle_set */
336 static int statsd_parse_line (char *buffer) /* {{{ */
337 {
338 char *name = buffer;
339 char *value;
340 char *type;
341 char *extra;
343 type = strchr (name, '|');
344 if (type == NULL)
345 return (-1);
346 *type = 0;
347 type++;
349 value = strrchr (name, ':');
350 if (value == NULL)
351 return (-1);
352 *value = 0;
353 value++;
355 extra = strchr (type, '|');
356 if (extra != NULL)
357 {
358 *extra = 0;
359 extra++;
360 }
362 if (strcmp ("c", type) == 0)
363 return (statsd_handle_counter (name, value, extra));
365 /* extra is only valid for counters */
366 if (extra != NULL)
367 return (-1);
369 if (strcmp ("g", type) == 0)
370 return (statsd_handle_gauge (name, value));
371 else if (strcmp ("ms", type) == 0)
372 return (statsd_handle_timer (name, value));
373 else if (strcmp ("s", type) == 0)
374 return (statsd_handle_set (name, value));
375 else
376 return (-1);
377 } /* }}} void statsd_parse_line */
379 static void statsd_parse_buffer (char *buffer) /* {{{ */
380 {
381 char *dummy;
382 char *saveptr = NULL;
383 char *ptr;
385 for (dummy = buffer;
386 (ptr = strtok_r (dummy, "\r\n", &saveptr)) != NULL;
387 dummy = NULL)
388 {
389 char *line_orig = sstrdup (ptr);
390 int status;
392 status = statsd_parse_line (ptr);
393 if (status != 0)
394 ERROR ("statsd plugin: Unable to parse line: \"%s\"", line_orig);
396 sfree (line_orig);
397 }
398 } /* }}} void statsd_parse_buffer */
400 static void statsd_network_read (int fd) /* {{{ */
401 {
402 char buffer[4096];
403 size_t buffer_size;
404 ssize_t status;
406 status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT);
407 if (status < 0)
408 {
409 char errbuf[1024];
411 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
412 return;
414 ERROR ("statsd plugin: recv(2) failed: %s",
415 sstrerror (errno, errbuf, sizeof (errbuf)));
416 return;
417 }
419 buffer_size = (size_t) status;
420 if (buffer_size >= sizeof (buffer))
421 buffer_size = sizeof (buffer) - 1;
422 buffer[buffer_size] = 0;
424 statsd_parse_buffer (buffer);
425 } /* }}} void statsd_network_read */
427 static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */
428 size_t *ret_fds_num)
429 {
430 struct pollfd *fds = NULL;
431 size_t fds_num = 0;
433 struct addrinfo ai_hints;
434 struct addrinfo *ai_list = NULL;
435 struct addrinfo *ai_ptr;
436 int status;
438 char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE;
439 char const *service = (conf_service != NULL)
440 ? conf_service : STATSD_DEFAULT_SERVICE;
442 memset (&ai_hints, 0, sizeof (ai_hints));
443 ai_hints.ai_flags = AI_PASSIVE;
444 #ifdef AI_ADDRCONFIG
445 ai_hints.ai_flags |= AI_ADDRCONFIG;
446 #endif
447 ai_hints.ai_family = AF_UNSPEC;
448 ai_hints.ai_socktype = SOCK_DGRAM;
450 status = getaddrinfo (node, service, &ai_hints, &ai_list);
451 if (status != 0)
452 {
453 ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s",
454 node, service, gai_strerror (status));
455 return (status);
456 }
458 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
459 {
460 int fd;
461 struct pollfd *tmp;
463 char dbg_node[NI_MAXHOST];
464 char dbg_service[NI_MAXSERV];
466 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
467 if (fd < 0)
468 {
469 char errbuf[1024];
470 ERROR ("statsd plugin: socket(2) failed: %s",
471 sstrerror (errno, errbuf, sizeof (errbuf)));
472 continue;
473 }
475 getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen,
476 dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service),
477 NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV);
478 DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service);
480 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
481 if (status != 0)
482 {
483 char errbuf[1024];
484 ERROR ("statsd plugin: bind(2) failed: %s",
485 sstrerror (errno, errbuf, sizeof (errbuf)));
486 close (fd);
487 continue;
488 }
490 tmp = realloc (fds, sizeof (*fds) * (fds_num + 1));
491 if (tmp == NULL)
492 {
493 ERROR ("statsd plugin: realloc failed.");
494 continue;
495 }
496 fds = tmp;
497 tmp = fds + fds_num;
498 fds_num++;
500 memset (tmp, 0, sizeof (*tmp));
501 tmp->fd = fd;
502 tmp->events = POLLIN | POLLPRI;
503 }
505 freeaddrinfo (ai_list);
507 if (fds_num == 0)
508 {
509 ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.",
510 (node != NULL) ? node : "::", service);
511 return (ENOENT);
512 }
514 *ret_fds = fds;
515 *ret_fds_num = fds_num;
516 return (0);
517 } /* }}} int statsd_network_init */
519 static void *statsd_network_thread (void *args) /* {{{ */
520 {
521 struct pollfd *fds = NULL;
522 size_t fds_num = 0;
523 int status;
524 size_t i;
526 status = statsd_network_init (&fds, &fds_num);
527 if (status != 0)
528 {
529 ERROR ("statsd plugin: Unable to open listening sockets.");
530 pthread_exit ((void *) 0);
531 }
533 while (!network_thread_shutdown)
534 {
535 status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1);
536 if (status < 0)
537 {
538 char errbuf[1024];
540 if ((errno == EINTR) || (errno == EAGAIN))
541 continue;
543 ERROR ("statsd plugin: poll(2) failed: %s",
544 sstrerror (errno, errbuf, sizeof (errbuf)));
545 break;
546 }
548 for (i = 0; i < fds_num; i++)
549 {
550 if ((fds[i].revents & (POLLIN | POLLPRI)) == 0)
551 continue;
553 statsd_network_read (fds[i].fd);
554 fds[i].revents = 0;
555 }
556 } /* while (!network_thread_shutdown) */
558 /* Clean up */
559 for (i = 0; i < fds_num; i++)
560 close (fds[i].fd);
561 sfree (fds);
563 return ((void *) 0);
564 } /* }}} void *statsd_network_thread */
566 static int statsd_config_timer_percentile (oconfig_item_t *ci) /* {{{ */
567 {
568 double percent = NAN;
569 double *tmp;
570 int status;
572 status = cf_util_get_double (ci, &percent);
573 if (status != 0)
574 return (status);
576 if ((percent <= 0.0) || (percent >= 100))
577 {
578 ERROR ("statsd plugin: The value for \"%s\" must be between 0 and 100, "
579 "exclusively.", ci->key);
580 return (ERANGE);
581 }
583 tmp = realloc (conf_timer_percentile,
584 sizeof (*conf_timer_percentile) * (conf_timer_percentile_num + 1));
585 if (tmp == NULL)
586 {
587 ERROR ("statsd plugin: realloc failed.");
588 return (ENOMEM);
589 }
590 conf_timer_percentile = tmp;
591 conf_timer_percentile[conf_timer_percentile_num] = percent;
592 conf_timer_percentile_num++;
594 return (0);
595 } /* }}} int statsd_config_timer_percentile */
597 static int statsd_config (oconfig_item_t *ci) /* {{{ */
598 {
599 int i;
601 for (i = 0; i < ci->children_num; i++)
602 {
603 oconfig_item_t *child = ci->children + i;
605 if (strcasecmp ("Host", child->key) == 0)
606 cf_util_get_string (child, &conf_node);
607 else if (strcasecmp ("Port", child->key) == 0)
608 cf_util_get_service (child, &conf_service);
609 else if (strcasecmp ("DeleteCounters", child->key) == 0)
610 cf_util_get_boolean (child, &conf_delete_counters);
611 else if (strcasecmp ("DeleteTimers", child->key) == 0)
612 cf_util_get_boolean (child, &conf_delete_timers);
613 else if (strcasecmp ("DeleteGauges", child->key) == 0)
614 cf_util_get_boolean (child, &conf_delete_gauges);
615 else if (strcasecmp ("DeleteSets", child->key) == 0)
616 cf_util_get_boolean (child, &conf_delete_sets);
617 else if (strcasecmp ("TimerPercentile", child->key) == 0)
618 statsd_config_timer_percentile (child);
619 else
620 ERROR ("statsd plugin: The \"%s\" config option is not valid.",
621 child->key);
622 }
624 return (0);
625 } /* }}} int statsd_config */
627 static int statsd_init (void) /* {{{ */
628 {
629 pthread_mutex_lock (&metrics_lock);
630 if (metrics_tree == NULL)
631 metrics_tree = c_avl_create ((void *) strcasecmp);
633 if (!network_thread_running)
634 {
635 int status;
637 status = pthread_create (&network_thread,
638 /* attr = */ NULL,
639 statsd_network_thread,
640 /* args = */ NULL);
641 if (status != 0)
642 {
643 char errbuf[1024];
644 pthread_mutex_unlock (&metrics_lock);
645 ERROR ("statsd plugin: pthread_create failed: %s",
646 sstrerror (errno, errbuf, sizeof (errbuf)));
647 return (status);
648 }
649 }
650 network_thread_running = 1;
652 pthread_mutex_unlock (&metrics_lock);
654 return (0);
655 } /* }}} int statsd_init */
657 /* Must hold metrics_lock when calling this function. */
658 static int statsd_metric_clear_set_unsafe (statsd_metric_t *metric) /* {{{ */
659 {
660 void *key;
661 void *value;
663 if ((metric == NULL) || (metric->type != STATSD_SET))
664 return (EINVAL);
666 if (metric->set == NULL)
667 return (0);
669 while (c_avl_pick (metric->set, &key, &value) == 0)
670 {
671 sfree (key);
672 sfree (value);
673 }
675 return (0);
676 } /* }}} int statsd_metric_clear_set_unsafe */
678 /* Must hold metrics_lock when calling this function. */
679 static int statsd_metric_submit_unsafe (char const *name, /* {{{ */
680 statsd_metric_t const *metric)
681 {
682 value_t values[1];
683 value_list_t vl = VALUE_LIST_INIT;
685 vl.values = values;
686 vl.values_len = 1;
687 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
688 sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin));
690 if (metric->type == STATSD_GAUGE)
691 sstrncpy (vl.type, "gauge", sizeof (vl.type));
692 else if (metric->type == STATSD_TIMER)
693 sstrncpy (vl.type, "latency", sizeof (vl.type));
694 else if (metric->type == STATSD_SET)
695 sstrncpy (vl.type, "objects", sizeof (vl.type));
696 else /* if (metric->type == STATSD_COUNTER) */
697 sstrncpy (vl.type, "derive", sizeof (vl.type));
699 sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
701 if (metric->type == STATSD_GAUGE)
702 values[0].gauge = (gauge_t) metric->value;
703 else if (metric->type == STATSD_TIMER)
704 {
705 size_t i;
707 if (metric->updates_num == 0)
708 return (0);
710 vl.time = cdtime ();
712 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
713 "%s-average", name);
714 values[0].gauge = CDTIME_T_TO_DOUBLE (
715 latency_counter_get_average (metric->latency));
716 plugin_dispatch_values (&vl);
718 for (i = 0; i < conf_timer_percentile_num; i++)
719 {
720 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
721 "%s-percentile-%.0f", name, conf_timer_percentile[i]);
722 values[0].gauge = CDTIME_T_TO_DOUBLE (
723 latency_counter_get_percentile (
724 metric->latency, conf_timer_percentile[i]));
725 plugin_dispatch_values (&vl);
726 }
728 latency_counter_reset (metrics->latency);
729 return (0);
730 }
731 else if (metric->type == STATSD_SET)
732 {
733 if (metric->set == NULL)
734 values[0].gauge = 0.0;
735 else
736 values[0].gauge = (gauge_t) c_avl_size (metric->set);
737 }
738 else
739 values[0].derive = (derive_t) metric->value;
741 return (plugin_dispatch_values (&vl));
742 } /* }}} int statsd_metric_submit_unsafe */
744 static int statsd_read (void) /* {{{ */
745 {
746 c_avl_iterator_t *iter;
747 char *name;
748 statsd_metric_t *metric;
750 char **to_be_deleted = NULL;
751 size_t to_be_deleted_num = 0;
752 size_t i;
754 pthread_mutex_lock (&metrics_lock);
756 if (metrics_tree == NULL)
757 {
758 pthread_mutex_unlock (&metrics_lock);
759 return (0);
760 }
762 iter = c_avl_get_iterator (metrics_tree);
763 while (c_avl_iterator_next (iter, (void *) &name, (void *) &metric) == 0)
764 {
765 if ((metric->updates_num == 0)
766 && ((conf_delete_counters && (metric->type == STATSD_COUNTER))
767 || (conf_delete_timers && (metric->type == STATSD_TIMER))
768 || (conf_delete_gauges && (metric->type == STATSD_GAUGE))
769 || (conf_delete_sets && (metric->type == STATSD_SET))))
770 {
771 DEBUG ("statsd plugin: Deleting metric \"%s\".", name);
772 strarray_add (&to_be_deleted, &to_be_deleted_num, name);
773 continue;
774 }
776 /* Names have a prefix, e.g. "c:", which determines the (statsd) type.
777 * Remove this here. */
778 statsd_metric_submit_unsafe (name + 2, metric);
780 /* Reset the metric. */
781 metric->updates_num = 0;
782 if (metric->type == STATSD_SET)
783 statsd_metric_clear_set_unsafe (metric);
784 }
785 c_avl_iterator_destroy (iter);
787 for (i = 0; i < to_be_deleted_num; i++)
788 {
789 int status;
791 status = c_avl_remove (metrics_tree, to_be_deleted[i],
792 (void *) &name, (void *) &metric);
793 if (status != 0)
794 {
795 ERROR ("stats plugin: c_avl_remove (\"%s\") failed with status %i.",
796 to_be_deleted[i], status);
797 continue;
798 }
800 sfree (name);
801 sfree (metric);
802 }
804 pthread_mutex_unlock (&metrics_lock);
806 strarray_free (to_be_deleted, to_be_deleted_num);
808 return (0);
809 } /* }}} int statsd_read */
811 static int statsd_shutdown (void) /* {{{ */
812 {
813 void *key;
814 void *value;
816 pthread_mutex_lock (&metrics_lock);
818 if (network_thread_running)
819 {
820 network_thread_shutdown = 1;
821 pthread_kill (network_thread, SIGTERM);
822 pthread_join (network_thread, /* retval = */ NULL);
823 }
824 network_thread_running = 0;
826 while (c_avl_pick (metrics_tree, &key, &value) == 0)
827 {
828 sfree (key);
829 sfree (value);
830 }
831 c_avl_destroy (metrics_tree);
832 metrics_tree = NULL;
834 sfree (conf_node);
835 sfree (conf_service);
837 pthread_mutex_unlock (&metrics_lock);
839 return (0);
840 } /* }}} int statsd_shutdown */
842 void module_register (void)
843 {
844 plugin_register_complex_config ("statsd", statsd_config);
845 plugin_register_init ("statsd", statsd_init);
846 plugin_register_read ("statsd", statsd_read);
847 plugin_register_shutdown ("statsd", statsd_shutdown);
848 }
850 /* vim: set sw=2 sts=2 et fdm=marker : */