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 /* AIX doesn't have MSG_DONTWAIT */
38 #ifndef MSG_DONTWAIT
39 # define MSG_DONTWAIT MSG_NONBLOCK
40 #endif
42 #ifndef STATSD_DEFAULT_NODE
43 # define STATSD_DEFAULT_NODE NULL
44 #endif
46 #ifndef STATSD_DEFAULT_SERVICE
47 # define STATSD_DEFAULT_SERVICE "8125"
48 #endif
50 enum metric_type_e
51 {
52 STATSD_COUNTER,
53 STATSD_TIMER,
54 STATSD_GAUGE,
55 STATSD_SET
56 };
57 typedef enum metric_type_e metric_type_t;
59 struct statsd_metric_s
60 {
61 metric_type_t type;
62 double value;
63 latency_counter_t *latency;
64 c_avl_tree_t *set;
65 unsigned long updates_num;
66 };
67 typedef struct statsd_metric_s statsd_metric_t;
69 static c_avl_tree_t *metrics_tree = NULL;
70 static pthread_mutex_t metrics_lock = PTHREAD_MUTEX_INITIALIZER;
72 static pthread_t network_thread;
73 static _Bool network_thread_running = 0;
74 static _Bool network_thread_shutdown = 0;
76 static char *conf_node = NULL;
77 static char *conf_service = NULL;
79 static _Bool conf_delete_counters = 0;
80 static _Bool conf_delete_timers = 0;
81 static _Bool conf_delete_gauges = 0;
82 static _Bool conf_delete_sets = 0;
84 static double *conf_timer_percentile = NULL;
85 static size_t conf_timer_percentile_num = 0;
87 static _Bool conf_timer_lower = 0;
88 static _Bool conf_timer_upper = 0;
89 static _Bool conf_timer_sum = 0;
90 static _Bool conf_timer_count = 0;
92 /* Must hold metrics_lock when calling this function. */
93 static statsd_metric_t *statsd_metric_lookup_unsafe (char const *name, /* {{{ */
94 metric_type_t type)
95 {
96 char key[DATA_MAX_NAME_LEN + 2];
97 char *key_copy;
98 statsd_metric_t *metric;
99 int status;
101 switch (type)
102 {
103 case STATSD_COUNTER: key[0] = 'c'; break;
104 case STATSD_TIMER: key[0] = 't'; break;
105 case STATSD_GAUGE: key[0] = 'g'; break;
106 case STATSD_SET: key[0] = 's'; break;
107 default: return (NULL);
108 }
110 key[1] = ':';
111 sstrncpy (&key[2], name, sizeof (key) - 2);
113 status = c_avl_get (metrics_tree, key, (void *) &metric);
114 if (status == 0)
115 return (metric);
117 key_copy = strdup (key);
118 if (key_copy == NULL)
119 {
120 ERROR ("statsd plugin: strdup failed.");
121 return (NULL);
122 }
124 metric = malloc (sizeof (*metric));
125 if (metric == NULL)
126 {
127 ERROR ("statsd plugin: malloc failed.");
128 sfree (key_copy);
129 return (NULL);
130 }
131 memset (metric, 0, sizeof (*metric));
133 metric->type = type;
134 metric->latency = NULL;
135 metric->set = NULL;
137 status = c_avl_insert (metrics_tree, key_copy, metric);
138 if (status != 0)
139 {
140 ERROR ("statsd plugin: c_avl_insert failed.");
141 sfree (key_copy);
142 sfree (metric);
143 return (NULL);
144 }
146 return (metric);
147 } /* }}} statsd_metric_lookup_unsafe */
149 static int statsd_metric_set (char const *name, double value, /* {{{ */
150 metric_type_t type)
151 {
152 statsd_metric_t *metric;
154 pthread_mutex_lock (&metrics_lock);
156 metric = statsd_metric_lookup_unsafe (name, type);
157 if (metric == NULL)
158 {
159 pthread_mutex_unlock (&metrics_lock);
160 return (-1);
161 }
163 metric->value = value;
164 metric->updates_num++;
166 pthread_mutex_unlock (&metrics_lock);
168 return (0);
169 } /* }}} int statsd_metric_set */
171 static int statsd_metric_add (char const *name, double delta, /* {{{ */
172 metric_type_t type)
173 {
174 statsd_metric_t *metric;
176 pthread_mutex_lock (&metrics_lock);
178 metric = statsd_metric_lookup_unsafe (name, type);
179 if (metric == NULL)
180 {
181 pthread_mutex_unlock (&metrics_lock);
182 return (-1);
183 }
185 metric->value += delta;
186 metric->updates_num++;
188 pthread_mutex_unlock (&metrics_lock);
190 return (0);
191 } /* }}} int statsd_metric_add */
193 static int statsd_parse_value (char const *str, value_t *ret_value) /* {{{ */
194 {
195 char *endptr = NULL;
197 ret_value->gauge = (gauge_t) strtod (str, &endptr);
198 if ((str == endptr) || ((endptr != NULL) && (*endptr != 0)))
199 return (-1);
201 return (0);
202 } /* }}} int statsd_parse_value */
204 static int statsd_handle_counter (char const *name, /* {{{ */
205 char const *value_str,
206 char const *extra)
207 {
208 value_t value;
209 value_t scale;
210 int status;
212 if ((extra != NULL) && (extra[0] != '@'))
213 return (-1);
215 scale.gauge = 1.0;
216 if (extra != NULL)
217 {
218 status = statsd_parse_value (extra + 1, &scale);
219 if (status != 0)
220 return (status);
222 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
223 return (-1);
224 }
226 value.gauge = 1.0;
227 status = statsd_parse_value (value_str, &value);
228 if (status != 0)
229 return (status);
231 return (statsd_metric_add (name, (double) (value.gauge / scale.gauge),
232 STATSD_COUNTER));
233 } /* }}} int statsd_handle_counter */
235 static int statsd_handle_gauge (char const *name, /* {{{ */
236 char const *value_str)
237 {
238 value_t value;
239 int status;
241 value.gauge = 0;
242 status = statsd_parse_value (value_str, &value);
243 if (status != 0)
244 return (status);
246 if ((value_str[0] == '+') || (value_str[0] == '-'))
247 return (statsd_metric_add (name, (double) value.gauge, STATSD_GAUGE));
248 else
249 return (statsd_metric_set (name, (double) value.gauge, STATSD_GAUGE));
250 } /* }}} int statsd_handle_gauge */
252 static int statsd_handle_timer (char const *name, /* {{{ */
253 char const *value_str)
254 {
255 statsd_metric_t *metric;
256 value_t value_ms;
257 cdtime_t value;
258 int status;
260 value_ms.derive = 0;
261 status = statsd_parse_value (value_str, &value_ms);
262 if (status != 0)
263 return (status);
265 value = MS_TO_CDTIME_T (value_ms.gauge);
267 pthread_mutex_lock (&metrics_lock);
269 metric = statsd_metric_lookup_unsafe (name, STATSD_TIMER);
270 if (metric == NULL)
271 {
272 pthread_mutex_unlock (&metrics_lock);
273 return (-1);
274 }
276 if (metric->latency == NULL)
277 metric->latency = latency_counter_create ();
278 if (metric->latency == NULL)
279 {
280 pthread_mutex_unlock (&metrics_lock);
281 return (-1);
282 }
284 latency_counter_add (metric->latency, value);
285 metric->updates_num++;
287 pthread_mutex_unlock (&metrics_lock);
288 return (0);
289 } /* }}} int statsd_handle_timer */
291 static int statsd_handle_set (char const *name, /* {{{ */
292 char const *set_key_orig)
293 {
294 statsd_metric_t *metric = NULL;
295 char *set_key;
296 int status;
298 pthread_mutex_lock (&metrics_lock);
300 metric = statsd_metric_lookup_unsafe (name, STATSD_SET);
301 if (metric == NULL)
302 {
303 pthread_mutex_unlock (&metrics_lock);
304 return (-1);
305 }
307 /* Make sure metric->set exists. */
308 if (metric->set == NULL)
309 metric->set = c_avl_create ((void *) strcmp);
311 if (metric->set == NULL)
312 {
313 pthread_mutex_unlock (&metrics_lock);
314 ERROR ("statsd plugin: c_avl_create failed.");
315 return (-1);
316 }
318 set_key = strdup (set_key_orig);
319 if (set_key == NULL)
320 {
321 pthread_mutex_unlock (&metrics_lock);
322 ERROR ("statsd plugin: strdup failed.");
323 return (-1);
324 }
326 status = c_avl_insert (metric->set, set_key, /* value = */ NULL);
327 if (status < 0)
328 {
329 pthread_mutex_unlock (&metrics_lock);
330 if (status < 0)
331 ERROR ("statsd plugin: c_avl_insert (\"%s\") failed with status %i.",
332 set_key, status);
333 sfree (set_key);
334 return (-1);
335 }
336 else if (status > 0) /* key already exists */
337 {
338 sfree (set_key);
339 }
341 metric->updates_num++;
343 pthread_mutex_unlock (&metrics_lock);
344 return (0);
345 } /* }}} int statsd_handle_set */
347 static int statsd_parse_line (char *buffer) /* {{{ */
348 {
349 char *name = buffer;
350 char *value;
351 char *type;
352 char *extra;
354 type = strchr (name, '|');
355 if (type == NULL)
356 return (-1);
357 *type = 0;
358 type++;
360 value = strrchr (name, ':');
361 if (value == NULL)
362 return (-1);
363 *value = 0;
364 value++;
366 extra = strchr (type, '|');
367 if (extra != NULL)
368 {
369 *extra = 0;
370 extra++;
371 }
373 if (strcmp ("c", type) == 0)
374 return (statsd_handle_counter (name, value, extra));
376 /* extra is only valid for counters */
377 if (extra != NULL)
378 return (-1);
380 if (strcmp ("g", type) == 0)
381 return (statsd_handle_gauge (name, value));
382 else if (strcmp ("ms", type) == 0)
383 return (statsd_handle_timer (name, value));
384 else if (strcmp ("s", type) == 0)
385 return (statsd_handle_set (name, value));
386 else
387 return (-1);
388 } /* }}} void statsd_parse_line */
390 static void statsd_parse_buffer (char *buffer) /* {{{ */
391 {
392 while (buffer != NULL)
393 {
394 char orig[64];
395 char *next;
396 int status;
398 next = strchr (buffer, '\n');
399 if (next != NULL)
400 {
401 *next = 0;
402 next++;
403 }
405 if (*buffer == 0)
406 {
407 buffer = next;
408 continue;
409 }
411 sstrncpy (orig, buffer, sizeof (orig));
413 status = statsd_parse_line (buffer);
414 if (status != 0)
415 ERROR ("statsd plugin: Unable to parse line: \"%s\"", orig);
417 buffer = next;
418 }
419 } /* }}} void statsd_parse_buffer */
421 static void statsd_network_read (int fd) /* {{{ */
422 {
423 char buffer[4096];
424 size_t buffer_size;
425 ssize_t status;
427 status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT);
428 if (status < 0)
429 {
430 char errbuf[1024];
432 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
433 return;
435 ERROR ("statsd plugin: recv(2) failed: %s",
436 sstrerror (errno, errbuf, sizeof (errbuf)));
437 return;
438 }
440 buffer_size = (size_t) status;
441 if (buffer_size >= sizeof (buffer))
442 buffer_size = sizeof (buffer) - 1;
443 buffer[buffer_size] = 0;
445 statsd_parse_buffer (buffer);
446 } /* }}} void statsd_network_read */
448 static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */
449 size_t *ret_fds_num)
450 {
451 struct pollfd *fds = NULL;
452 size_t fds_num = 0;
454 struct addrinfo ai_hints;
455 struct addrinfo *ai_list = NULL;
456 struct addrinfo *ai_ptr;
457 int status;
459 char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE;
460 char const *service = (conf_service != NULL)
461 ? conf_service : STATSD_DEFAULT_SERVICE;
463 memset (&ai_hints, 0, sizeof (ai_hints));
464 ai_hints.ai_flags = AI_PASSIVE;
465 #ifdef AI_ADDRCONFIG
466 ai_hints.ai_flags |= AI_ADDRCONFIG;
467 #endif
468 ai_hints.ai_family = AF_UNSPEC;
469 ai_hints.ai_socktype = SOCK_DGRAM;
471 status = getaddrinfo (node, service, &ai_hints, &ai_list);
472 if (status != 0)
473 {
474 ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s",
475 node, service, gai_strerror (status));
476 return (status);
477 }
479 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
480 {
481 int fd;
482 struct pollfd *tmp;
484 char dbg_node[NI_MAXHOST];
485 char dbg_service[NI_MAXSERV];
487 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
488 if (fd < 0)
489 {
490 char errbuf[1024];
491 ERROR ("statsd plugin: socket(2) failed: %s",
492 sstrerror (errno, errbuf, sizeof (errbuf)));
493 continue;
494 }
496 getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen,
497 dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service),
498 NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV);
499 DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service);
501 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
502 if (status != 0)
503 {
504 char errbuf[1024];
505 ERROR ("statsd plugin: bind(2) failed: %s",
506 sstrerror (errno, errbuf, sizeof (errbuf)));
507 close (fd);
508 continue;
509 }
511 tmp = realloc (fds, sizeof (*fds) * (fds_num + 1));
512 if (tmp == NULL)
513 {
514 ERROR ("statsd plugin: realloc failed.");
515 continue;
516 }
517 fds = tmp;
518 tmp = fds + fds_num;
519 fds_num++;
521 memset (tmp, 0, sizeof (*tmp));
522 tmp->fd = fd;
523 tmp->events = POLLIN | POLLPRI;
524 }
526 freeaddrinfo (ai_list);
528 if (fds_num == 0)
529 {
530 ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.",
531 (node != NULL) ? node : "::", service);
532 return (ENOENT);
533 }
535 *ret_fds = fds;
536 *ret_fds_num = fds_num;
537 return (0);
538 } /* }}} int statsd_network_init */
540 static void *statsd_network_thread (void *args) /* {{{ */
541 {
542 struct pollfd *fds = NULL;
543 size_t fds_num = 0;
544 int status;
545 size_t i;
547 status = statsd_network_init (&fds, &fds_num);
548 if (status != 0)
549 {
550 ERROR ("statsd plugin: Unable to open listening sockets.");
551 pthread_exit ((void *) 0);
552 }
554 while (!network_thread_shutdown)
555 {
556 status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1);
557 if (status < 0)
558 {
559 char errbuf[1024];
561 if ((errno == EINTR) || (errno == EAGAIN))
562 continue;
564 ERROR ("statsd plugin: poll(2) failed: %s",
565 sstrerror (errno, errbuf, sizeof (errbuf)));
566 break;
567 }
569 for (i = 0; i < fds_num; i++)
570 {
571 if ((fds[i].revents & (POLLIN | POLLPRI)) == 0)
572 continue;
574 statsd_network_read (fds[i].fd);
575 fds[i].revents = 0;
576 }
577 } /* while (!network_thread_shutdown) */
579 /* Clean up */
580 for (i = 0; i < fds_num; i++)
581 close (fds[i].fd);
582 sfree (fds);
584 return ((void *) 0);
585 } /* }}} void *statsd_network_thread */
587 static int statsd_config_timer_percentile (oconfig_item_t *ci) /* {{{ */
588 {
589 double percent = NAN;
590 double *tmp;
591 int status;
593 status = cf_util_get_double (ci, &percent);
594 if (status != 0)
595 return (status);
597 if ((percent <= 0.0) || (percent >= 100))
598 {
599 ERROR ("statsd plugin: The value for \"%s\" must be between 0 and 100, "
600 "exclusively.", ci->key);
601 return (ERANGE);
602 }
604 tmp = realloc (conf_timer_percentile,
605 sizeof (*conf_timer_percentile) * (conf_timer_percentile_num + 1));
606 if (tmp == NULL)
607 {
608 ERROR ("statsd plugin: realloc failed.");
609 return (ENOMEM);
610 }
611 conf_timer_percentile = tmp;
612 conf_timer_percentile[conf_timer_percentile_num] = percent;
613 conf_timer_percentile_num++;
615 return (0);
616 } /* }}} int statsd_config_timer_percentile */
618 static int statsd_config (oconfig_item_t *ci) /* {{{ */
619 {
620 int i;
622 for (i = 0; i < ci->children_num; i++)
623 {
624 oconfig_item_t *child = ci->children + i;
626 if (strcasecmp ("Host", child->key) == 0)
627 cf_util_get_string (child, &conf_node);
628 else if (strcasecmp ("Port", child->key) == 0)
629 cf_util_get_service (child, &conf_service);
630 else if (strcasecmp ("DeleteCounters", child->key) == 0)
631 cf_util_get_boolean (child, &conf_delete_counters);
632 else if (strcasecmp ("DeleteTimers", child->key) == 0)
633 cf_util_get_boolean (child, &conf_delete_timers);
634 else if (strcasecmp ("DeleteGauges", child->key) == 0)
635 cf_util_get_boolean (child, &conf_delete_gauges);
636 else if (strcasecmp ("DeleteSets", child->key) == 0)
637 cf_util_get_boolean (child, &conf_delete_sets);
638 else if (strcasecmp ("TimerLower", child->key) == 0)
639 cf_util_get_boolean (child, &conf_timer_lower);
640 else if (strcasecmp ("TimerUpper", child->key) == 0)
641 cf_util_get_boolean (child, &conf_timer_upper);
642 else if (strcasecmp ("TimerSum", child->key) == 0)
643 cf_util_get_boolean (child, &conf_timer_sum);
644 else if (strcasecmp ("TimerCount", child->key) == 0)
645 cf_util_get_boolean (child, &conf_timer_count);
646 else if (strcasecmp ("TimerPercentile", child->key) == 0)
647 statsd_config_timer_percentile (child);
648 else
649 ERROR ("statsd plugin: The \"%s\" config option is not valid.",
650 child->key);
651 }
653 return (0);
654 } /* }}} int statsd_config */
656 static int statsd_init (void) /* {{{ */
657 {
658 pthread_mutex_lock (&metrics_lock);
659 if (metrics_tree == NULL)
660 metrics_tree = c_avl_create ((void *) strcmp);
662 if (!network_thread_running)
663 {
664 int status;
666 status = pthread_create (&network_thread,
667 /* attr = */ NULL,
668 statsd_network_thread,
669 /* args = */ NULL);
670 if (status != 0)
671 {
672 char errbuf[1024];
673 pthread_mutex_unlock (&metrics_lock);
674 ERROR ("statsd plugin: pthread_create failed: %s",
675 sstrerror (errno, errbuf, sizeof (errbuf)));
676 return (status);
677 }
678 }
679 network_thread_running = 1;
681 pthread_mutex_unlock (&metrics_lock);
683 return (0);
684 } /* }}} int statsd_init */
686 /* Must hold metrics_lock when calling this function. */
687 static int statsd_metric_clear_set_unsafe (statsd_metric_t *metric) /* {{{ */
688 {
689 void *key;
690 void *value;
692 if ((metric == NULL) || (metric->type != STATSD_SET))
693 return (EINVAL);
695 if (metric->set == NULL)
696 return (0);
698 while (c_avl_pick (metric->set, &key, &value) == 0)
699 {
700 sfree (key);
701 sfree (value);
702 }
704 return (0);
705 } /* }}} int statsd_metric_clear_set_unsafe */
707 /* Must hold metrics_lock when calling this function. */
708 static int statsd_metric_submit_unsafe (char const *name, /* {{{ */
709 statsd_metric_t const *metric)
710 {
711 value_t values[1];
712 value_list_t vl = VALUE_LIST_INIT;
714 vl.values = values;
715 vl.values_len = 1;
716 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
717 sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin));
719 if (metric->type == STATSD_GAUGE)
720 sstrncpy (vl.type, "gauge", sizeof (vl.type));
721 else if (metric->type == STATSD_TIMER)
722 sstrncpy (vl.type, "latency", sizeof (vl.type));
723 else if (metric->type == STATSD_SET)
724 sstrncpy (vl.type, "objects", sizeof (vl.type));
725 else /* if (metric->type == STATSD_COUNTER) */
726 sstrncpy (vl.type, "derive", sizeof (vl.type));
728 sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
730 if (metric->type == STATSD_GAUGE)
731 values[0].gauge = (gauge_t) metric->value;
732 else if (metric->type == STATSD_TIMER)
733 {
734 size_t i;
736 if (metric->updates_num == 0)
737 return (0);
739 vl.time = cdtime ();
741 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
742 "%s-average", name);
743 values[0].gauge = CDTIME_T_TO_DOUBLE (
744 latency_counter_get_average (metric->latency));
745 plugin_dispatch_values (&vl);
747 if (conf_timer_lower) {
748 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
749 "%s-lower", name);
750 values[0].gauge = CDTIME_T_TO_DOUBLE (
751 latency_counter_get_min (metric->latency));
752 plugin_dispatch_values (&vl);
753 }
755 if (conf_timer_upper) {
756 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
757 "%s-upper", name);
758 values[0].gauge = CDTIME_T_TO_DOUBLE (
759 latency_counter_get_max (metric->latency));
760 plugin_dispatch_values (&vl);
761 }
763 if (conf_timer_sum) {
764 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
765 "%s-sum", name);
766 values[0].gauge = CDTIME_T_TO_DOUBLE (
767 latency_counter_get_sum (metric->latency));
768 plugin_dispatch_values (&vl);
769 }
771 for (i = 0; i < conf_timer_percentile_num; i++)
772 {
773 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
774 "%s-percentile-%.0f", name, conf_timer_percentile[i]);
775 values[0].gauge = CDTIME_T_TO_DOUBLE (
776 latency_counter_get_percentile (
777 metric->latency, conf_timer_percentile[i]));
778 plugin_dispatch_values (&vl);
779 }
781 /* Keep this at the end, since vl.type is set to "gauge" here. The
782 * vl.type's above are implicitly set to "latency". */
783 if (conf_timer_count) {
784 sstrncpy (vl.type, "gauge", sizeof (vl.type));
785 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
786 "%s-count", name);
787 values[0].gauge = latency_counter_get_num (metric->latency);
788 plugin_dispatch_values (&vl);
789 }
791 latency_counter_reset (metric->latency);
792 return (0);
793 }
794 else if (metric->type == STATSD_SET)
795 {
796 if (metric->set == NULL)
797 values[0].gauge = 0.0;
798 else
799 values[0].gauge = (gauge_t) c_avl_size (metric->set);
800 }
801 else
802 values[0].derive = (derive_t) metric->value;
804 return (plugin_dispatch_values (&vl));
805 } /* }}} int statsd_metric_submit_unsafe */
807 static int statsd_read (void) /* {{{ */
808 {
809 c_avl_iterator_t *iter;
810 char *name;
811 statsd_metric_t *metric;
813 char **to_be_deleted = NULL;
814 size_t to_be_deleted_num = 0;
815 size_t i;
817 pthread_mutex_lock (&metrics_lock);
819 if (metrics_tree == NULL)
820 {
821 pthread_mutex_unlock (&metrics_lock);
822 return (0);
823 }
825 iter = c_avl_get_iterator (metrics_tree);
826 while (c_avl_iterator_next (iter, (void *) &name, (void *) &metric) == 0)
827 {
828 if ((metric->updates_num == 0)
829 && ((conf_delete_counters && (metric->type == STATSD_COUNTER))
830 || (conf_delete_timers && (metric->type == STATSD_TIMER))
831 || (conf_delete_gauges && (metric->type == STATSD_GAUGE))
832 || (conf_delete_sets && (metric->type == STATSD_SET))))
833 {
834 DEBUG ("statsd plugin: Deleting metric \"%s\".", name);
835 strarray_add (&to_be_deleted, &to_be_deleted_num, name);
836 continue;
837 }
839 /* Names have a prefix, e.g. "c:", which determines the (statsd) type.
840 * Remove this here. */
841 statsd_metric_submit_unsafe (name + 2, metric);
843 /* Reset the metric. */
844 metric->updates_num = 0;
845 if (metric->type == STATSD_SET)
846 statsd_metric_clear_set_unsafe (metric);
847 }
848 c_avl_iterator_destroy (iter);
850 for (i = 0; i < to_be_deleted_num; i++)
851 {
852 int status;
854 status = c_avl_remove (metrics_tree, to_be_deleted[i],
855 (void *) &name, (void *) &metric);
856 if (status != 0)
857 {
858 ERROR ("stats plugin: c_avl_remove (\"%s\") failed with status %i.",
859 to_be_deleted[i], status);
860 continue;
861 }
863 sfree (name);
864 sfree (metric);
865 }
867 pthread_mutex_unlock (&metrics_lock);
869 strarray_free (to_be_deleted, to_be_deleted_num);
871 return (0);
872 } /* }}} int statsd_read */
874 static int statsd_shutdown (void) /* {{{ */
875 {
876 void *key;
877 void *value;
879 pthread_mutex_lock (&metrics_lock);
881 if (network_thread_running)
882 {
883 network_thread_shutdown = 1;
884 pthread_kill (network_thread, SIGTERM);
885 pthread_join (network_thread, /* retval = */ NULL);
886 }
887 network_thread_running = 0;
889 while (c_avl_pick (metrics_tree, &key, &value) == 0)
890 {
891 sfree (key);
892 sfree (value);
893 }
894 c_avl_destroy (metrics_tree);
895 metrics_tree = NULL;
897 sfree (conf_node);
898 sfree (conf_service);
900 pthread_mutex_unlock (&metrics_lock);
902 return (0);
903 } /* }}} int statsd_shutdown */
905 void module_register (void)
906 {
907 plugin_register_complex_config ("statsd", statsd_config);
908 plugin_register_init ("statsd", statsd_init);
909 plugin_register_read ("statsd", statsd_read);
910 plugin_register_shutdown ("statsd", statsd_shutdown);
911 }
913 /* vim: set sw=2 sts=2 et fdm=marker : */