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 {
260 statsd_metric_t *metric;
261 value_t value_ms;
262 cdtime_t value;
263 int status;
265 value_ms.derive = 0;
266 status = statsd_parse_value (value_str, &value_ms);
267 if (status != 0)
268 return (status);
270 value = MS_TO_CDTIME_T (value_ms.gauge);
272 pthread_mutex_lock (&metrics_lock);
274 metric = statsd_metric_lookup_unsafe (name, STATSD_TIMER);
275 if (metric == NULL)
276 {
277 pthread_mutex_unlock (&metrics_lock);
278 return (-1);
279 }
281 if (metric->latency == NULL)
282 metric->latency = latency_counter_create ();
283 if (metric->latency == NULL)
284 {
285 pthread_mutex_unlock (&metrics_lock);
286 return (-1);
287 }
289 latency_counter_add (metric->latency, value);
290 metric->updates_num++;
292 pthread_mutex_unlock (&metrics_lock);
293 return (0);
294 } /* }}} int statsd_handle_timer */
296 static int statsd_handle_set (char const *name, /* {{{ */
297 char const *set_key_orig)
298 {
299 statsd_metric_t *metric = NULL;
300 char *set_key;
301 int status;
303 pthread_mutex_lock (&metrics_lock);
305 metric = statsd_metric_lookup_unsafe (name, STATSD_SET);
306 if (metric == NULL)
307 {
308 pthread_mutex_unlock (&metrics_lock);
309 return (-1);
310 }
312 /* Make sure metric->set exists. */
313 if (metric->set == NULL)
314 metric->set = c_avl_create ((void *) strcmp);
316 if (metric->set == NULL)
317 {
318 pthread_mutex_unlock (&metrics_lock);
319 ERROR ("statsd plugin: c_avl_create failed.");
320 return (-1);
321 }
323 set_key = strdup (set_key_orig);
324 if (set_key == NULL)
325 {
326 pthread_mutex_unlock (&metrics_lock);
327 ERROR ("statsd plugin: strdup failed.");
328 return (-1);
329 }
331 status = c_avl_insert (metric->set, set_key, /* value = */ NULL);
332 if (status < 0)
333 {
334 pthread_mutex_unlock (&metrics_lock);
335 if (status < 0)
336 ERROR ("statsd plugin: c_avl_insert (\"%s\") failed with status %i.",
337 set_key, status);
338 sfree (set_key);
339 return (-1);
340 }
341 else if (status > 0) /* key already exists */
342 {
343 sfree (set_key);
344 }
346 metric->updates_num++;
348 pthread_mutex_unlock (&metrics_lock);
349 return (0);
350 } /* }}} int statsd_handle_set */
352 static int statsd_parse_line (char *buffer) /* {{{ */
353 {
354 char *name = buffer;
355 char *value;
356 char *type;
357 char *extra;
359 type = strchr (name, '|');
360 if (type == NULL)
361 return (-1);
362 *type = 0;
363 type++;
365 value = strrchr (name, ':');
366 if (value == NULL)
367 return (-1);
368 *value = 0;
369 value++;
371 extra = strchr (type, '|');
372 if (extra != NULL)
373 {
374 *extra = 0;
375 extra++;
376 }
378 if (strcmp ("c", type) == 0)
379 return (statsd_handle_counter (name, value, extra));
381 /* extra is only valid for counters */
382 if (extra != NULL)
383 return (-1);
385 if (strcmp ("g", type) == 0)
386 return (statsd_handle_gauge (name, value));
387 else if (strcmp ("ms", type) == 0)
388 return (statsd_handle_timer (name, value));
389 else if (strcmp ("s", type) == 0)
390 return (statsd_handle_set (name, value));
391 else
392 return (-1);
393 } /* }}} void statsd_parse_line */
395 static void statsd_parse_buffer (char *buffer) /* {{{ */
396 {
397 while (buffer != NULL)
398 {
399 char orig[64];
400 char *next;
401 int status;
403 next = strchr (buffer, '\n');
404 if (next != NULL)
405 {
406 *next = 0;
407 next++;
408 }
410 if (*buffer == 0)
411 {
412 buffer = next;
413 continue;
414 }
416 sstrncpy (orig, buffer, sizeof (orig));
418 status = statsd_parse_line (buffer);
419 if (status != 0)
420 ERROR ("statsd plugin: Unable to parse line: \"%s\"", orig);
422 buffer = next;
423 }
424 } /* }}} void statsd_parse_buffer */
426 static void statsd_network_read (int fd) /* {{{ */
427 {
428 char buffer[4096];
429 size_t buffer_size;
430 ssize_t status;
432 status = recv (fd, buffer, sizeof (buffer), /* flags = */ MSG_DONTWAIT);
433 if (status < 0)
434 {
435 char errbuf[1024];
437 if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
438 return;
440 ERROR ("statsd plugin: recv(2) failed: %s",
441 sstrerror (errno, errbuf, sizeof (errbuf)));
442 return;
443 }
445 buffer_size = (size_t) status;
446 if (buffer_size >= sizeof (buffer))
447 buffer_size = sizeof (buffer) - 1;
448 buffer[buffer_size] = 0;
450 statsd_parse_buffer (buffer);
451 } /* }}} void statsd_network_read */
453 static int statsd_network_init (struct pollfd **ret_fds, /* {{{ */
454 size_t *ret_fds_num)
455 {
456 struct pollfd *fds = NULL;
457 size_t fds_num = 0;
459 struct addrinfo ai_hints;
460 struct addrinfo *ai_list = NULL;
461 struct addrinfo *ai_ptr;
462 int status;
464 char const *node = (conf_node != NULL) ? conf_node : STATSD_DEFAULT_NODE;
465 char const *service = (conf_service != NULL)
466 ? conf_service : STATSD_DEFAULT_SERVICE;
468 memset (&ai_hints, 0, sizeof (ai_hints));
469 ai_hints.ai_flags = AI_PASSIVE;
470 #ifdef AI_ADDRCONFIG
471 ai_hints.ai_flags |= AI_ADDRCONFIG;
472 #endif
473 ai_hints.ai_family = AF_UNSPEC;
474 ai_hints.ai_socktype = SOCK_DGRAM;
476 status = getaddrinfo (node, service, &ai_hints, &ai_list);
477 if (status != 0)
478 {
479 ERROR ("statsd plugin: getaddrinfo (\"%s\", \"%s\") failed: %s",
480 node, service, gai_strerror (status));
481 return (status);
482 }
484 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
485 {
486 int fd;
487 struct pollfd *tmp;
489 char dbg_node[NI_MAXHOST];
490 char dbg_service[NI_MAXSERV];
492 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
493 if (fd < 0)
494 {
495 char errbuf[1024];
496 ERROR ("statsd plugin: socket(2) failed: %s",
497 sstrerror (errno, errbuf, sizeof (errbuf)));
498 continue;
499 }
501 getnameinfo (ai_ptr->ai_addr, ai_ptr->ai_addrlen,
502 dbg_node, sizeof (dbg_node), dbg_service, sizeof (dbg_service),
503 NI_DGRAM | NI_NUMERICHOST | NI_NUMERICSERV);
504 DEBUG ("statsd plugin: Trying to bind to [%s]:%s ...", dbg_node, dbg_service);
506 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
507 if (status != 0)
508 {
509 char errbuf[1024];
510 ERROR ("statsd plugin: bind(2) failed: %s",
511 sstrerror (errno, errbuf, sizeof (errbuf)));
512 close (fd);
513 continue;
514 }
516 tmp = realloc (fds, sizeof (*fds) * (fds_num + 1));
517 if (tmp == NULL)
518 {
519 ERROR ("statsd plugin: realloc failed.");
520 continue;
521 }
522 fds = tmp;
523 tmp = fds + fds_num;
524 fds_num++;
526 memset (tmp, 0, sizeof (*tmp));
527 tmp->fd = fd;
528 tmp->events = POLLIN | POLLPRI;
529 }
531 freeaddrinfo (ai_list);
533 if (fds_num == 0)
534 {
535 ERROR ("statsd plugin: Unable to create listening socket for [%s]:%s.",
536 (node != NULL) ? node : "::", service);
537 return (ENOENT);
538 }
540 *ret_fds = fds;
541 *ret_fds_num = fds_num;
542 return (0);
543 } /* }}} int statsd_network_init */
545 static void *statsd_network_thread (void *args) /* {{{ */
546 {
547 struct pollfd *fds = NULL;
548 size_t fds_num = 0;
549 int status;
550 size_t i;
552 status = statsd_network_init (&fds, &fds_num);
553 if (status != 0)
554 {
555 ERROR ("statsd plugin: Unable to open listening sockets.");
556 pthread_exit ((void *) 0);
557 }
559 while (!network_thread_shutdown)
560 {
561 status = poll (fds, (nfds_t) fds_num, /* timeout = */ -1);
562 if (status < 0)
563 {
564 char errbuf[1024];
566 if ((errno == EINTR) || (errno == EAGAIN))
567 continue;
569 ERROR ("statsd plugin: poll(2) failed: %s",
570 sstrerror (errno, errbuf, sizeof (errbuf)));
571 break;
572 }
574 for (i = 0; i < fds_num; i++)
575 {
576 if ((fds[i].revents & (POLLIN | POLLPRI)) == 0)
577 continue;
579 statsd_network_read (fds[i].fd);
580 fds[i].revents = 0;
581 }
582 } /* while (!network_thread_shutdown) */
584 /* Clean up */
585 for (i = 0; i < fds_num; i++)
586 close (fds[i].fd);
587 sfree (fds);
589 return ((void *) 0);
590 } /* }}} void *statsd_network_thread */
592 static int statsd_config_timer_percentile (oconfig_item_t *ci) /* {{{ */
593 {
594 double percent = NAN;
595 double *tmp;
596 int status;
598 status = cf_util_get_double (ci, &percent);
599 if (status != 0)
600 return (status);
602 if ((percent <= 0.0) || (percent >= 100))
603 {
604 ERROR ("statsd plugin: The value for \"%s\" must be between 0 and 100, "
605 "exclusively.", ci->key);
606 return (ERANGE);
607 }
609 tmp = realloc (conf_timer_percentile,
610 sizeof (*conf_timer_percentile) * (conf_timer_percentile_num + 1));
611 if (tmp == NULL)
612 {
613 ERROR ("statsd plugin: realloc failed.");
614 return (ENOMEM);
615 }
616 conf_timer_percentile = tmp;
617 conf_timer_percentile[conf_timer_percentile_num] = percent;
618 conf_timer_percentile_num++;
620 return (0);
621 } /* }}} int statsd_config_timer_percentile */
623 static int statsd_config (oconfig_item_t *ci) /* {{{ */
624 {
625 int i;
627 for (i = 0; i < ci->children_num; i++)
628 {
629 oconfig_item_t *child = ci->children + i;
631 if (strcasecmp ("Host", child->key) == 0)
632 cf_util_get_string (child, &conf_node);
633 else if (strcasecmp ("Port", child->key) == 0)
634 cf_util_get_service (child, &conf_service);
635 else if (strcasecmp ("DeleteCounters", child->key) == 0)
636 cf_util_get_boolean (child, &conf_delete_counters);
637 else if (strcasecmp ("DeleteTimers", child->key) == 0)
638 cf_util_get_boolean (child, &conf_delete_timers);
639 else if (strcasecmp ("DeleteGauges", child->key) == 0)
640 cf_util_get_boolean (child, &conf_delete_gauges);
641 else if (strcasecmp ("DeleteSets", child->key) == 0)
642 cf_util_get_boolean (child, &conf_delete_sets);
643 else if (strcasecmp ("TimerLower", child->key) == 0)
644 cf_util_get_boolean (child, &conf_timer_lower);
645 else if (strcasecmp ("TimerUpper", child->key) == 0)
646 cf_util_get_boolean (child, &conf_timer_upper);
647 else if (strcasecmp ("TimerSum", child->key) == 0)
648 cf_util_get_boolean (child, &conf_timer_sum);
649 else if (strcasecmp ("TimerCount", child->key) == 0)
650 cf_util_get_boolean (child, &conf_timer_count);
651 else if (strcasecmp ("TimerPercentile", child->key) == 0)
652 statsd_config_timer_percentile (child);
653 else
654 ERROR ("statsd plugin: The \"%s\" config option is not valid.",
655 child->key);
656 }
658 return (0);
659 } /* }}} int statsd_config */
661 static int statsd_init (void) /* {{{ */
662 {
663 pthread_mutex_lock (&metrics_lock);
664 if (metrics_tree == NULL)
665 metrics_tree = c_avl_create ((void *) strcmp);
667 if (!network_thread_running)
668 {
669 int status;
671 status = pthread_create (&network_thread,
672 /* attr = */ NULL,
673 statsd_network_thread,
674 /* args = */ NULL);
675 if (status != 0)
676 {
677 char errbuf[1024];
678 pthread_mutex_unlock (&metrics_lock);
679 ERROR ("statsd plugin: pthread_create failed: %s",
680 sstrerror (errno, errbuf, sizeof (errbuf)));
681 return (status);
682 }
683 }
684 network_thread_running = 1;
686 pthread_mutex_unlock (&metrics_lock);
688 return (0);
689 } /* }}} int statsd_init */
691 /* Must hold metrics_lock when calling this function. */
692 static int statsd_metric_clear_set_unsafe (statsd_metric_t *metric) /* {{{ */
693 {
694 void *key;
695 void *value;
697 if ((metric == NULL) || (metric->type != STATSD_SET))
698 return (EINVAL);
700 if (metric->set == NULL)
701 return (0);
703 while (c_avl_pick (metric->set, &key, &value) == 0)
704 {
705 sfree (key);
706 sfree (value);
707 }
709 return (0);
710 } /* }}} int statsd_metric_clear_set_unsafe */
712 /* Must hold metrics_lock when calling this function. */
713 static int statsd_metric_submit_unsafe (char const *name, /* {{{ */
714 statsd_metric_t const *metric)
715 {
716 value_t values[1];
717 value_list_t vl = VALUE_LIST_INIT;
719 vl.values = values;
720 vl.values_len = 1;
721 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
722 sstrncpy (vl.plugin, "statsd", sizeof (vl.plugin));
724 if (metric->type == STATSD_GAUGE)
725 sstrncpy (vl.type, "gauge", sizeof (vl.type));
726 else if (metric->type == STATSD_TIMER)
727 sstrncpy (vl.type, "latency", sizeof (vl.type));
728 else if (metric->type == STATSD_SET)
729 sstrncpy (vl.type, "objects", sizeof (vl.type));
730 else /* if (metric->type == STATSD_COUNTER) */
731 sstrncpy (vl.type, "derive", sizeof (vl.type));
733 sstrncpy (vl.type_instance, name, sizeof (vl.type_instance));
735 if (metric->type == STATSD_GAUGE)
736 values[0].gauge = (gauge_t) metric->value;
737 else if (metric->type == STATSD_TIMER)
738 {
739 size_t i;
741 if (metric->updates_num == 0)
742 return (0);
744 vl.time = cdtime ();
746 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
747 "%s-average", name);
748 values[0].gauge = CDTIME_T_TO_DOUBLE (
749 latency_counter_get_average (metric->latency));
750 plugin_dispatch_values (&vl);
752 if (conf_timer_lower) {
753 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
754 "%s-lower", name);
755 values[0].gauge = CDTIME_T_TO_DOUBLE (
756 latency_counter_get_min (metric->latency));
757 plugin_dispatch_values (&vl);
758 }
760 if (conf_timer_upper) {
761 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
762 "%s-upper", name);
763 values[0].gauge = CDTIME_T_TO_DOUBLE (
764 latency_counter_get_max (metric->latency));
765 plugin_dispatch_values (&vl);
766 }
768 if (conf_timer_sum) {
769 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
770 "%s-sum", name);
771 values[0].gauge = CDTIME_T_TO_DOUBLE (
772 latency_counter_get_sum (metric->latency));
773 plugin_dispatch_values (&vl);
774 }
776 for (i = 0; i < conf_timer_percentile_num; i++)
777 {
778 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
779 "%s-percentile-%.0f", name, conf_timer_percentile[i]);
780 values[0].gauge = CDTIME_T_TO_DOUBLE (
781 latency_counter_get_percentile (
782 metric->latency, conf_timer_percentile[i]));
783 plugin_dispatch_values (&vl);
784 }
786 /* Keep this at the end, since vl.type is set to "gauge" here. The
787 * vl.type's above are implicitly set to "latency". */
788 if (conf_timer_count) {
789 sstrncpy (vl.type, "gauge", sizeof (vl.type));
790 ssnprintf (vl.type_instance, sizeof (vl.type_instance),
791 "%s-count", name);
792 values[0].gauge = latency_counter_get_num (metric->latency);
793 plugin_dispatch_values (&vl);
794 }
796 latency_counter_reset (metric->latency);
797 return (0);
798 }
799 else if (metric->type == STATSD_SET)
800 {
801 if (metric->set == NULL)
802 values[0].gauge = 0.0;
803 else
804 values[0].gauge = (gauge_t) c_avl_size (metric->set);
805 }
806 else
807 values[0].derive = (derive_t) metric->value;
809 return (plugin_dispatch_values (&vl));
810 } /* }}} int statsd_metric_submit_unsafe */
812 static int statsd_read (void) /* {{{ */
813 {
814 c_avl_iterator_t *iter;
815 char *name;
816 statsd_metric_t *metric;
818 char **to_be_deleted = NULL;
819 size_t to_be_deleted_num = 0;
820 size_t i;
822 pthread_mutex_lock (&metrics_lock);
824 if (metrics_tree == NULL)
825 {
826 pthread_mutex_unlock (&metrics_lock);
827 return (0);
828 }
830 iter = c_avl_get_iterator (metrics_tree);
831 while (c_avl_iterator_next (iter, (void *) &name, (void *) &metric) == 0)
832 {
833 if ((metric->updates_num == 0)
834 && ((conf_delete_counters && (metric->type == STATSD_COUNTER))
835 || (conf_delete_timers && (metric->type == STATSD_TIMER))
836 || (conf_delete_gauges && (metric->type == STATSD_GAUGE))
837 || (conf_delete_sets && (metric->type == STATSD_SET))))
838 {
839 DEBUG ("statsd plugin: Deleting metric \"%s\".", name);
840 strarray_add (&to_be_deleted, &to_be_deleted_num, name);
841 continue;
842 }
844 /* Names have a prefix, e.g. "c:", which determines the (statsd) type.
845 * Remove this here. */
846 statsd_metric_submit_unsafe (name + 2, metric);
848 /* Reset the metric. */
849 metric->updates_num = 0;
850 if (metric->type == STATSD_SET)
851 statsd_metric_clear_set_unsafe (metric);
852 }
853 c_avl_iterator_destroy (iter);
855 for (i = 0; i < to_be_deleted_num; i++)
856 {
857 int status;
859 status = c_avl_remove (metrics_tree, to_be_deleted[i],
860 (void *) &name, (void *) &metric);
861 if (status != 0)
862 {
863 ERROR ("stats plugin: c_avl_remove (\"%s\") failed with status %i.",
864 to_be_deleted[i], status);
865 continue;
866 }
868 sfree (name);
869 sfree (metric);
870 }
872 pthread_mutex_unlock (&metrics_lock);
874 strarray_free (to_be_deleted, to_be_deleted_num);
876 return (0);
877 } /* }}} int statsd_read */
879 static int statsd_shutdown (void) /* {{{ */
880 {
881 void *key;
882 void *value;
884 pthread_mutex_lock (&metrics_lock);
886 if (network_thread_running)
887 {
888 network_thread_shutdown = 1;
889 pthread_kill (network_thread, SIGTERM);
890 pthread_join (network_thread, /* retval = */ NULL);
891 }
892 network_thread_running = 0;
894 while (c_avl_pick (metrics_tree, &key, &value) == 0)
895 {
896 sfree (key);
897 sfree (value);
898 }
899 c_avl_destroy (metrics_tree);
900 metrics_tree = NULL;
902 sfree (conf_node);
903 sfree (conf_service);
905 pthread_mutex_unlock (&metrics_lock);
907 return (0);
908 } /* }}} int statsd_shutdown */
910 void module_register (void)
911 {
912 plugin_register_complex_config ("statsd", statsd_config);
913 plugin_register_init ("statsd", statsd_init);
914 plugin_register_read ("statsd", statsd_read);
915 plugin_register_shutdown ("statsd", statsd_shutdown);
916 }
918 /* vim: set sw=2 sts=2 et fdm=marker : */