1 /**
2 * collectd - src/statsd.c
3 * Copyright (C) 2013 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 */
27 #include "collectd.h"
28 #include "plugin.h"
29 #include "common.h"
30 #include "configfile.h"
31 #include "utils_avltree.h"
32 #include "utils_complain.h"
33 #include "utils_latency.h"
35 #include <pthread.h>
37 #include <sys/types.h>
38 #include <sys/socket.h>
39 #include <netdb.h>
40 #include <poll.h>
42 /* AIX doesn't have MSG_DONTWAIT */
43 #ifndef MSG_DONTWAIT
44 # define MSG_DONTWAIT MSG_NONBLOCK
45 #endif
47 #ifndef STATSD_DEFAULT_NODE
48 # define STATSD_DEFAULT_NODE NULL
49 #endif
51 #ifndef STATSD_DEFAULT_SERVICE
52 # define STATSD_DEFAULT_SERVICE "8125"
53 #endif
55 enum metric_type_e
56 {
57 STATSD_COUNTER,
58 STATSD_TIMER,
59 STATSD_GAUGE,
60 STATSD_SET
61 };
62 typedef enum metric_type_e metric_type_t;
64 struct statsd_metric_s
65 {
66 metric_type_t type;
67 double value;
68 latency_counter_t *latency;
69 c_avl_tree_t *set;
70 unsigned long updates_num;
71 };
72 typedef struct statsd_metric_s statsd_metric_t;
74 static c_avl_tree_t *metrics_tree = NULL;
75 static pthread_mutex_t metrics_lock = PTHREAD_MUTEX_INITIALIZER;
77 static pthread_t network_thread;
78 static _Bool network_thread_running = 0;
79 static _Bool network_thread_shutdown = 0;
81 static char *conf_node = NULL;
82 static char *conf_service = NULL;
84 static _Bool conf_delete_counters = 0;
85 static _Bool conf_delete_timers = 0;
86 static _Bool conf_delete_gauges = 0;
87 static _Bool conf_delete_sets = 0;
89 static double *conf_timer_percentile = NULL;
90 static size_t conf_timer_percentile_num = 0;
92 static _Bool conf_timer_lower = 0;
93 static _Bool conf_timer_upper = 0;
94 static _Bool conf_timer_sum = 0;
95 static _Bool conf_timer_count = 0;
97 /* Must hold metrics_lock when calling this function. */
98 static statsd_metric_t *statsd_metric_lookup_unsafe (char const *name, /* {{{ */
99 metric_type_t type)
100 {
101 char key[DATA_MAX_NAME_LEN + 2];
102 char *key_copy;
103 statsd_metric_t *metric;
104 int status;
106 switch (type)
107 {
108 case STATSD_COUNTER: key[0] = 'c'; break;
109 case STATSD_TIMER: key[0] = 't'; break;
110 case STATSD_GAUGE: key[0] = 'g'; break;
111 case STATSD_SET: key[0] = 's'; break;
112 default: return (NULL);
113 }
115 key[1] = ':';
116 sstrncpy (&key[2], name, sizeof (key) - 2);
118 status = c_avl_get (metrics_tree, key, (void *) &metric);
119 if (status == 0)
120 return (metric);
122 key_copy = strdup (key);
123 if (key_copy == NULL)
124 {
125 ERROR ("statsd plugin: strdup failed.");
126 return (NULL);
127 }
129 metric = malloc (sizeof (*metric));
130 if (metric == NULL)
131 {
132 ERROR ("statsd plugin: malloc failed.");
133 sfree (key_copy);
134 return (NULL);
135 }
136 memset (metric, 0, sizeof (*metric));
138 metric->type = type;
139 metric->latency = NULL;
140 metric->set = NULL;
142 status = c_avl_insert (metrics_tree, key_copy, metric);
143 if (status != 0)
144 {
145 ERROR ("statsd plugin: c_avl_insert failed.");
146 sfree (key_copy);
147 sfree (metric);
148 return (NULL);
149 }
151 return (metric);
152 } /* }}} statsd_metric_lookup_unsafe */
154 static int statsd_metric_set (char const *name, double value, /* {{{ */
155 metric_type_t type)
156 {
157 statsd_metric_t *metric;
159 pthread_mutex_lock (&metrics_lock);
161 metric = statsd_metric_lookup_unsafe (name, type);
162 if (metric == NULL)
163 {
164 pthread_mutex_unlock (&metrics_lock);
165 return (-1);
166 }
168 metric->value = value;
169 metric->updates_num++;
171 pthread_mutex_unlock (&metrics_lock);
173 return (0);
174 } /* }}} int statsd_metric_set */
176 static int statsd_metric_add (char const *name, double delta, /* {{{ */
177 metric_type_t type)
178 {
179 statsd_metric_t *metric;
181 pthread_mutex_lock (&metrics_lock);
183 metric = statsd_metric_lookup_unsafe (name, type);
184 if (metric == NULL)
185 {
186 pthread_mutex_unlock (&metrics_lock);
187 return (-1);
188 }
190 metric->value += delta;
191 metric->updates_num++;
193 pthread_mutex_unlock (&metrics_lock);
195 return (0);
196 } /* }}} int statsd_metric_add */
198 static int statsd_parse_value (char const *str, value_t *ret_value) /* {{{ */
199 {
200 char *endptr = NULL;
202 ret_value->gauge = (gauge_t) strtod (str, &endptr);
203 if ((str == endptr) || ((endptr != NULL) && (*endptr != 0)))
204 return (-1);
206 return (0);
207 } /* }}} int statsd_parse_value */
209 static int statsd_handle_counter (char const *name, /* {{{ */
210 char const *value_str,
211 char const *extra)
212 {
213 value_t value;
214 value_t scale;
215 int status;
217 if ((extra != NULL) && (extra[0] != '@'))
218 return (-1);
220 scale.gauge = 1.0;
221 if (extra != NULL)
222 {
223 status = statsd_parse_value (extra + 1, &scale);
224 if (status != 0)
225 return (status);
227 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
228 return (-1);
229 }
231 value.gauge = 1.0;
232 status = statsd_parse_value (value_str, &value);
233 if (status != 0)
234 return (status);
236 return (statsd_metric_add (name, (double) (value.gauge / scale.gauge),
237 STATSD_COUNTER));
238 } /* }}} int statsd_handle_counter */
240 static int statsd_handle_gauge (char const *name, /* {{{ */
241 char const *value_str)
242 {
243 value_t value;
244 int status;
246 value.gauge = 0;
247 status = statsd_parse_value (value_str, &value);
248 if (status != 0)
249 return (status);
251 if ((value_str[0] == '+') || (value_str[0] == '-'))
252 return (statsd_metric_add (name, (double) value.gauge, STATSD_GAUGE));
253 else
254 return (statsd_metric_set (name, (double) value.gauge, STATSD_GAUGE));
255 } /* }}} int statsd_handle_gauge */
257 static int statsd_handle_timer (char const *name, /* {{{ */
258 char const *value_str,
259 char const *extra)
260 {
261 statsd_metric_t *metric;
262 value_t value_ms;
263 value_t scale;
264 cdtime_t value;
265 int status;
267 if ((extra != NULL) && (extra[0] != '@'))
268 return (-1);
270 scale.gauge = 1.0;
271 if (extra != NULL)
272 {
273 status = statsd_parse_value (extra + 1, &scale);
274 if (status != 0)
275 return (status);
277 if (!isfinite (scale.gauge) || (scale.gauge <= 0.0) || (scale.gauge > 1.0))
278 return (-1);
279 }
281 value_ms.derive = 0;
282 status = statsd_parse_value (value_str, &value_ms);
283 if (status != 0)
284 return (status);
286 value = MS_TO_CDTIME_T (value_ms.gauge / scale.gauge);
288 pthread_mutex_lock (&metrics_lock);
290 metric = statsd_metric_lookup_unsafe (name, STATSD_TIMER);
291 if (metric == NULL)
292 {
293 pthread_mutex_unlock (&metrics_lock);
294 return (-1);
295 }
297 if (metric->latency == NULL)
298 metric->latency = latency_counter_create ();
299 if (metric->latency == NULL)
300 {
301 pthread_mutex_unlock (&metrics_lock);
302 return (-1);
303 }
305 latency_counter_add (metric->latency, value);
306 metric->updates_num++;
308 pthread_mutex_unlock (&metrics_lock);
309 return (0);
310 } /* }}} int statsd_handle_timer */
312 static int statsd_handle_set (char const *name, /* {{{ */
313 char const *set_key_orig)
314 {
315 statsd_metric_t *metric = NULL;
316 char *set_key;
317 int status;
319 pthread_mutex_lock (&metrics_lock);
321 metric = statsd_metric_lookup_unsafe (name, STATSD_SET);
322 if (metric == NULL)
323 {
324 pthread_mutex_unlock (&metrics_lock);
325 return (-1);
326 }
328 /* Make sure metric->set exists. */
329 if (metric->set == NULL)
330 metric->set = c_avl_create ((void *) strcmp);
332 if (metric->set == NULL)
333 {
334 pthread_mutex_unlock (&metrics_lock);
335 ERROR ("statsd plugin: c_avl_create failed.");
336 return (-1);
337 }
339 set_key = strdup (set_key_orig);
340 if (set_key == NULL)
341 {
342 pthread_mutex_unlock (&metrics_lock);
343 ERROR ("statsd plugin: strdup failed.");
344 return (-1);
345 }
347 status = c_avl_insert (metric->set, set_key, /* value = */ NULL);
348 if (status < 0)
349 {
350 pthread_mutex_unlock (&metrics_lock);
351 if (status < 0)
352 ERROR ("statsd plugin: c_avl_insert (\"%s\") failed with status %i.",
353 set_key, status);
354 sfree (set_key);
355 return (-1);
356 }
357 else if (status > 0) /* key already exists */
358 {
359 sfree (set_key);
360 }
362 metric->updates_num++;
364 pthread_mutex_unlock (&metrics_lock);
365 return (0);
366 } /* }}} int statsd_handle_set */
368 static int statsd_parse_line (char *buffer) /* {{{ */
369 {
370 char *name = buffer;
371 char *value;
372 char *type;
373 char *extra;
375 type = strchr (name, '|');
376 if (type == NULL)
377 return (-1);
378 *type = 0;
379 type++;
381 value = strrchr (name, ':');
382 if (value == NULL)
383 return (-1);
384 *value = 0;
385 value++;
387 extra = strchr (type, '|');
388 if (extra != NULL)
389 {
390 *extra = 0;
391 extra++;
392 }
394 if (strcmp ("c", type) == 0)
395 return (statsd_handle_counter (name, value, extra));
396 else if (strcmp ("ms", type) == 0)
397 return (statsd_handle_timer (name, value, extra));
399 /* extra is only valid for counters and timers */
400 if (extra != NULL)
401 return (-1);
403 if (strcmp ("g", type) == 0)
404 return (statsd_handle_gauge (name, value));
405 else if (strcmp ("s", type) == 0)
406 return (statsd_handle_set (name, value));
407 else
408 return (-1);
409 } /* }}} void statsd_parse_line */
411 static void statsd_parse_buffer (char *buffer) /* {{{ */
412 {
413 while (buffer != NULL)
414 {
415 char orig[64];
416 char *next;
417 int status;
419 next = strchr (buffer, '\n');
420 if (next != NULL)
421 {
422 *next = 0;
423 next++;
424 }
426 if (*buffer == 0)
427 {
428 buffer = next;
429 continue;
430 }
432 sstrncpy (orig, buffer, sizeof (orig));
434 status = statsd_parse_line (buffer);
435 if (status != 0)
436 ERROR ("statsd plugin: Unable to parse line: \"%s\"", orig);
438 buffer = next;
439 }
440 } /* }}} void statsd_parse_buffer */
442 static void statsd_network_read (int fd) /* {{{ */
443 {
444 char buffer[4096];
445 size_t buffer_size;
446 ssize_t status;
448 status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT);
449 if (status < 0)
450 {
451 char errbuf[1024];
453 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
454 return;
456 ERROR ("statsd plugin: recv(2) failed: %s",
457 sstrerror (errno, errbuf, sizeof (errbuf)));
458 return;
459 }
461 buffer_size = (size_t) status;
462 if (buffer_size >= sizeof (buffer))
463 buffer_size = sizeof (buffer) - 1;
464 buffer[buffer_size] = 0;
466 statsd_parse_buffer (buffer);
467 } /* }}} void statsd_network_read */
469 static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */
470 size_t *ret_fds_num)
471 {
472 struct pollfd *fds = NULL;
473 size_t fds_num = 0;
475 struct addrinfo ai_hints;
476 struct addrinfo *ai_list = NULL;
477 struct addrinfo *ai_ptr;
478 int status;
480 char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE;
481 char const *service = (conf_service != NULL)
482 ? conf_service : STATSD_DEFAULT_SERVICE;
484 memset (&ai_hints, 0, sizeof (ai_hints));
485 ai_hints.ai_flags = AI_PASSIVE;
486 #ifdef AI_ADDRCONFIG
487 ai_hints.ai_flags |= AI_ADDRCONFIG;
488 #endif
489 ai_hints.ai_family = AF_UNSPEC;
490 ai_hints.ai_socktype = SOCK_DGRAM;
492 status = getaddrinfo (node, service, &ai_hints, &ai_list);
493 if (status != 0)
494 {
495 ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s",
496 node, service, gai_strerror (status));
497 return (status);
498 }
500 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
501 {
502 int fd;
503 struct pollfd *tmp;
505 char dbg_node[NI_MAXHOST];
506 char dbg_service[NI_MAXSERV];
508 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
509 if (fd < 0)
510 {
511 char errbuf[1024];
512 ERROR ("statsd plugin: socket(2) failed: %s",
513 sstrerror (errno, errbuf, sizeof (errbuf)));
514 continue;
515 }
517 getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen,
518 dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service),
519 NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV);
520 DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service);
522 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
523 if (status != 0)
524 {
525 char errbuf[1024];
526 ERROR ("statsd plugin: bind(2) failed: %s",
527 sstrerror (errno, errbuf, sizeof (errbuf)));
528 close (fd);
529 continue;
530 }
532 tmp = realloc (fds, sizeof (*fds) * (fds_num + 1));
533 if (tmp == NULL)
534 {
535 ERROR ("statsd plugin: realloc failed.");
536 continue;
537 }
538 fds = tmp;
539 tmp = fds + fds_num;
540 fds_num++;
542 memset (tmp, 0, sizeof (*tmp));
543 tmp->fd = fd;
544 tmp->events = POLLIN | POLLPRI;
545 }
547 freeaddrinfo (ai_list);
549 if (fds_num == 0)
550 {
551 ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.",
552 (node != NULL) ? node : "::", service);
553 return (ENOENT);
554 }
556 *ret_fds = fds;
557 *ret_fds_num = fds_num;
558 return (0);
559 } /* }}} int statsd_network_init */
561 static void *statsd_network_thread (void *args) /* {{{ */
562 {
563 struct pollfd *fds = NULL;
564 size_t fds_num = 0;
565 int status;
566 size_t i;
568 status = statsd_network_init (&fds, &fds_num);
569 if (status != 0)
570 {
571 ERROR ("statsd plugin: Unable to open listening sockets.");
572 pthread_exit ((void *) 0);
573 }
575 while (!network_thread_shutdown)
576 {
577 status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1);
578 if (status < 0)
579 {
580 char errbuf[1024];
582 if ((errno == EINTR) || (errno == EAGAIN))
583 continue;
585 ERROR ("statsd plugin: poll(2) failed: %s",
586 sstrerror (errno, errbuf, sizeof (errbuf)));
587 break;
588 }
590 for (i = 0; i < fds_num; i++)
591 {
592 if ((fds[i].revents & (POLLIN | POLLPRI)) == 0)
593 continue;
595 statsd_network_read (fds[i].fd);
596 fds[i].revents = 0;
597 }
598 } /* while (!network_thread_shutdown) */
600 /* Clean up */
601 for (i = 0; i < fds_num; i++)
602 close (fds[i].fd);
603 sfree (fds);
605 return ((void *) 0);
606 } /* }}} void *statsd_network_thread */
608 static int statsd_config_timer_percentile (oconfig_item_t *ci) /* {{{ */
609 {
610 double percent = NAN;
611 double *tmp;
612 int status;
614 status = cf_util_get_double (ci, &percent);
615 if (status != 0)
616 return (status);
618 if ((percent <= 0.0) || (percent >= 100))
619 {
620 ERROR ("statsd plugin: The value for \"%s\" must be between 0 and 100, "
621 "exclusively.", ci->key);
622 return (ERANGE);
623 }
625 tmp = realloc (conf_timer_percentile,
626 sizeof (*conf_timer_percentile) * (conf_timer_percentile_num + 1));
627 if (tmp == NULL)
628 {
629 ERROR ("statsd plugin: realloc failed.");
630 return (ENOMEM);
631 }
632 conf_timer_percentile = tmp;
633 conf_timer_percentile[conf_timer_percentile_num] = percent;
634 conf_timer_percentile_num++;
636 return (0);
637 } /* }}} int statsd_config_timer_percentile */
639 static int statsd_config (oconfig_item_t *ci) /* {{{ */
640 {
641 int i;
643 for (i = 0; i < ci->children_num; i++)
644 {
645 oconfig_item_t *child = ci->children + i;
647 if (strcasecmp ("Host", child->key) == 0)
648 cf_util_get_string (child, &conf_node);
649 else if (strcasecmp ("Port", child->key) == 0)
650 cf_util_get_service (child, &conf_service);
651 else if (strcasecmp ("DeleteCounters", child->key) == 0)
652 cf_util_get_boolean (child, &conf_delete_counters);
653 else if (strcasecmp ("DeleteTimers", child->key) == 0)
654 cf_util_get_boolean (child, &conf_delete_timers);
655 else if (strcasecmp ("DeleteGauges", child->key) == 0)
656 cf_util_get_boolean (child, &conf_delete_gauges);
657 else if (strcasecmp ("DeleteSets", child->key) == 0)
658 cf_util_get_boolean (child, &conf_delete_sets);
659 else if (strcasecmp ("TimerLower", child->key) == 0)
660 cf_util_get_boolean (child, &conf_timer_lower);
661 else if (strcasecmp ("TimerUpper", child->key) == 0)
662 cf_util_get_boolean (child, &conf_timer_upper);
663 else if (strcasecmp ("TimerSum", child->key) == 0)
664 cf_util_get_boolean (child, &conf_timer_sum);
665 else if (strcasecmp ("TimerCount", child->key) == 0)
666 cf_util_get_boolean (child, &conf_timer_count);
667 else if (strcasecmp ("TimerPercentile", child->key) == 0)
668 statsd_config_timer_percentile (child);
669 else
670 ERROR ("statsd plugin: The \"%s\" config option is not valid.",
671 child->key);
672 }
674 return (0);
675 } /* }}} int statsd_config */
677 static int statsd_init (void) /* {{{ */
678 {
679 pthread_mutex_lock (&metrics_lock);
680 if (metrics_tree == NULL)
681 metrics_tree = c_avl_create ((void *) strcmp);
683 if (!network_thread_running)
684 {
685 int status;
687 status = pthread_create (&network_thread,
688 /* attr = */ NULL,
689 statsd_network_thread,
690 /* args = */ NULL);
691 if (status != 0)
692 {
693 char errbuf[1024];
694 pthread_mutex_unlock (&metrics_lock);
695 ERROR ("statsd plugin: pthread_create failed: %s",
696 sstrerror (errno, errbuf, sizeof (errbuf)));
697 return (status);
698 }
699 }
700 network_thread_running = 1;
702 pthread_mutex_unlock (&metrics_lock);
704 return (0);
705 } /* }}} int statsd_init */
707 /* Must hold metrics_lock when calling this function. */
708 static int statsd_metric_clear_set_unsafe (statsd_metric_t *metric) /* {{{ */
709 {
710 void *key;
711 void *value;
713 if ((metric == NULL) || (metric->type != STATSD_SET))
714 return (EINVAL);
716 if (metric->set == NULL)
717 return (0);
719 while (c_avl_pick (metric->set, &key, &value) == 0)
720 {
721 sfree (key);
722 sfree (value);
723 }
725 return (0);
726 } /* }}} int statsd_metric_clear_set_unsafe */
728 /* Must hold metrics_lock when calling this function. */
729 static int statsd_metric_submit_unsafe (char const *name, /* {{{ */
730 statsd_metric_t const *metric)
731 {
732 value_t values[1];
733 value_list_t vl = VALUE_LIST_INIT;
735 vl.values = values;
736 vl.values_len = 1;
737 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
738 sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin));
740 if (metric->type == STATSD_GAUGE)
741 sstrncpy (vl.type, "gauge", sizeof (vl.type));
742 else if (metric->type == STATSD_TIMER)
743 sstrncpy (vl.type, "latency", sizeof (vl.type));
744 else if (metric->type == STATSD_SET)
745 sstrncpy (vl.type, "objects", sizeof (vl.type));
746 else /* if (metric->type == STATSD_COUNTER) */
747 sstrncpy (vl.type, "derive", sizeof (vl.type));
749 sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
751 if (metric->type == STATSD_GAUGE)
752 values[0].gauge = (gauge_t) metric->value;
753 else if (metric->type == STATSD_TIMER)
754 {
755 size_t i;
757 if (metric->updates_num == 0)
758 return (0);
760 vl.time = cdtime ();
762 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
763 "%s-average", name);
764 values[0].gauge = CDTIME_T_TO_DOUBLE (
765 latency_counter_get_average (metric->latency));
766 plugin_dispatch_values (&vl);
768 if (conf_timer_lower) {
769 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
770 "%s-lower", name);
771 values[0].gauge = CDTIME_T_TO_DOUBLE (
772 latency_counter_get_min (metric->latency));
773 plugin_dispatch_values (&vl);
774 }
776 if (conf_timer_upper) {
777 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
778 "%s-upper", name);
779 values[0].gauge = CDTIME_T_TO_DOUBLE (
780 latency_counter_get_max (metric->latency));
781 plugin_dispatch_values (&vl);
782 }
784 if (conf_timer_sum) {
785 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
786 "%s-sum", name);
787 values[0].gauge = CDTIME_T_TO_DOUBLE (
788 latency_counter_get_sum (metric->latency));
789 plugin_dispatch_values (&vl);
790 }
792 for (i = 0; i < conf_timer_percentile_num; i++)
793 {
794 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
795 "%s-percentile-%.0f", name, conf_timer_percentile[i]);
796 values[0].gauge = CDTIME_T_TO_DOUBLE (
797 latency_counter_get_percentile (
798 metric->latency, conf_timer_percentile[i]));
799 plugin_dispatch_values (&vl);
800 }
802 /* Keep this at the end, since vl.type is set to "gauge" here. The
803 * vl.type's above are implicitly set to "latency". */
804 if (conf_timer_count) {
805 sstrncpy (vl.type, "gauge", sizeof (vl.type));
806 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
807 "%s-count", name);
808 values[0].gauge = latency_counter_get_num (metric->latency);
809 plugin_dispatch_values (&vl);
810 }
812 latency_counter_reset (metric->latency);
813 return (0);
814 }
815 else if (metric->type == STATSD_SET)
816 {
817 if (metric->set == NULL)
818 values[0].gauge = 0.0;
819 else
820 values[0].gauge = (gauge_t) c_avl_size (metric->set);
821 }
822 else
823 values[0].derive = (derive_t) metric->value;
825 return (plugin_dispatch_values (&vl));
826 } /* }}} int statsd_metric_submit_unsafe */
828 static int statsd_read (void) /* {{{ */
829 {
830 c_avl_iterator_t *iter;
831 char *name;
832 statsd_metric_t *metric;
834 char **to_be_deleted = NULL;
835 size_t to_be_deleted_num = 0;
836 size_t i;
838 pthread_mutex_lock (&metrics_lock);
840 if (metrics_tree == NULL)
841 {
842 pthread_mutex_unlock (&metrics_lock);
843 return (0);
844 }
846 iter = c_avl_get_iterator (metrics_tree);
847 while (c_avl_iterator_next (iter, (void *) &name, (void *) &metric) == 0)
848 {
849 if ((metric->updates_num == 0)
850 && ((conf_delete_counters && (metric->type == STATSD_COUNTER))
851 || (conf_delete_timers && (metric->type == STATSD_TIMER))
852 || (conf_delete_gauges && (metric->type == STATSD_GAUGE))
853 || (conf_delete_sets && (metric->type == STATSD_SET))))
854 {
855 DEBUG ("statsd plugin: Deleting metric \"%s\".", name);
856 strarray_add (&to_be_deleted, &to_be_deleted_num, name);
857 continue;
858 }
860 /* Names have a prefix, e.g. "c:", which determines the (statsd) type.
861 * Remove this here. */
862 statsd_metric_submit_unsafe (name + 2, metric);
864 /* Reset the metric. */
865 metric->updates_num = 0;
866 if (metric->type == STATSD_SET)
867 statsd_metric_clear_set_unsafe (metric);
868 }
869 c_avl_iterator_destroy (iter);
871 for (i = 0; i < to_be_deleted_num; i++)
872 {
873 int status;
875 status = c_avl_remove (metrics_tree, to_be_deleted[i],
876 (void *) &name, (void *) &metric);
877 if (status != 0)
878 {
879 ERROR ("stats plugin: c_avl_remove (\"%s\") failed with status %i.",
880 to_be_deleted[i], status);
881 continue;
882 }
884 sfree (name);
885 sfree (metric);
886 }
888 pthread_mutex_unlock (&metrics_lock);
890 strarray_free (to_be_deleted, to_be_deleted_num);
892 return (0);
893 } /* }}} int statsd_read */
895 static int statsd_shutdown (void) /* {{{ */
896 {
897 void *key;
898 void *value;
900 pthread_mutex_lock (&metrics_lock);
902 if (network_thread_running)
903 {
904 network_thread_shutdown = 1;
905 pthread_kill (network_thread, SIGTERM);
906 pthread_join (network_thread, /* retval = */ NULL);
907 }
908 network_thread_running = 0;
910 while (c_avl_pick (metrics_tree, &key, &value) == 0)
911 {
912 sfree (key);
913 sfree (value);
914 }
915 c_avl_destroy (metrics_tree);
916 metrics_tree = NULL;
918 sfree (conf_node);
919 sfree (conf_service);
921 pthread_mutex_unlock (&metrics_lock);
923 return (0);
924 } /* }}} int statsd_shutdown */
926 void module_register (void)
927 {
928 plugin_register_complex_config ("statsd", statsd_config);
929 plugin_register_init ("statsd", statsd_init);
930 plugin_register_read ("statsd", statsd_read);
931 plugin_register_shutdown ("statsd", statsd_shutdown);
932 }
934 /* vim: set sw=2 sts=2 et fdm=marker : */