e643f457a7e6ba564242e369f8ad7bf64b0ebbd2
1 /*
2 * SysDB - src/core/store.c
3 * Copyright (C) 2012-2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
17 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
28 #if HAVE_CONFIG_H
29 # include "config.h"
30 #endif /* HAVE_CONFIG_H */
32 #include "sysdb.h"
33 #include "core/store-private.h"
34 #include "core/plugin.h"
35 #include "utils/avltree.h"
36 #include "utils/error.h"
38 #include <assert.h>
40 #include <errno.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <string.h>
46 #include <math.h>
47 #include <pthread.h>
49 /*
50 * private variables
51 */
53 struct sdb_store {
54 sdb_object_t super;
56 /* hosts are the top-level entries and
57 * reference everything else */
58 sdb_avltree_t *hosts;
59 pthread_rwlock_t host_lock;
60 };
62 /*
63 * private types
64 */
66 static sdb_type_t host_type;
67 static sdb_type_t service_type;
68 static sdb_type_t metric_type;
69 static sdb_type_t attribute_type;
71 static int
72 store_init(sdb_object_t *obj, va_list __attribute__((unused)) ap)
73 {
74 int err;
75 if (! (SDB_STORE(obj)->hosts = sdb_avltree_create()))
76 return -1;
77 if ((err = pthread_rwlock_init(&SDB_STORE(obj)->host_lock,
78 /* attr = */ NULL))) {
79 char errbuf[128];
80 sdb_log(SDB_LOG_ERR, "store: Failed to initialize lock: %s",
81 sdb_strerror(err, errbuf, sizeof(errbuf)));
82 return -1;
83 }
84 return 0;
85 } /* store_init */
87 static void
88 store_destroy(sdb_object_t *obj)
89 {
90 int err;
91 if ((err = pthread_rwlock_destroy(&SDB_STORE(obj)->host_lock))) {
92 char errbuf[128];
93 sdb_log(SDB_LOG_ERR, "store: Failed to destroy lock: %s",
94 sdb_strerror(err, errbuf, sizeof(errbuf)));
95 return;
96 }
97 sdb_avltree_destroy(SDB_STORE(obj)->hosts);
98 SDB_STORE(obj)->hosts = NULL;
99 } /* store_destroy */
101 static int
102 store_obj_init(sdb_object_t *obj, va_list ap)
103 {
104 sdb_store_obj_t *sobj = STORE_OBJ(obj);
106 sobj->type = va_arg(ap, int);
108 sobj->last_update = va_arg(ap, sdb_time_t);
109 sobj->interval = 0;
110 sobj->backends = NULL;
111 sobj->backends_num = 0;
112 sobj->parent = NULL;
113 return 0;
114 } /* store_obj_init */
116 static void
117 store_obj_destroy(sdb_object_t *obj)
118 {
119 sdb_store_obj_t *sobj = STORE_OBJ(obj);
120 size_t i;
122 for (i = 0; i < sobj->backends_num; ++i)
123 free(sobj->backends[i]);
124 free(sobj->backends);
125 sobj->backends = NULL;
126 sobj->backends_num = 0;
128 // We don't currently keep an extra reference for parent objects to
129 // avoid circular self-references which are not handled correctly by
130 // the ref-count base management layer.
131 //sdb_object_deref(SDB_OBJ(sobj->parent));
132 } /* store_obj_destroy */
134 static int
135 host_init(sdb_object_t *obj, va_list ap)
136 {
137 host_t *sobj = HOST(obj);
138 int ret;
140 /* this will consume the first argument (type) of ap */
141 ret = store_obj_init(obj, ap);
142 if (ret)
143 return ret;
145 sobj->services = sdb_avltree_create();
146 if (! sobj->services)
147 return -1;
148 sobj->metrics = sdb_avltree_create();
149 if (! sobj->metrics)
150 return -1;
151 sobj->attributes = sdb_avltree_create();
152 if (! sobj->attributes)
153 return -1;
154 return 0;
155 } /* host_init */
157 static void
158 host_destroy(sdb_object_t *obj)
159 {
160 host_t *sobj = HOST(obj);
161 assert(obj);
163 store_obj_destroy(obj);
165 if (sobj->services)
166 sdb_avltree_destroy(sobj->services);
167 if (sobj->metrics)
168 sdb_avltree_destroy(sobj->metrics);
169 if (sobj->attributes)
170 sdb_avltree_destroy(sobj->attributes);
171 } /* host_destroy */
173 static int
174 service_init(sdb_object_t *obj, va_list ap)
175 {
176 service_t *sobj = SVC(obj);
177 int ret;
179 /* this will consume the first argument (type) of ap */
180 ret = store_obj_init(obj, ap);
181 if (ret)
182 return ret;
184 sobj->attributes = sdb_avltree_create();
185 if (! sobj->attributes)
186 return -1;
187 return 0;
188 } /* service_init */
190 static void
191 service_destroy(sdb_object_t *obj)
192 {
193 service_t *sobj = SVC(obj);
194 assert(obj);
196 store_obj_destroy(obj);
198 if (sobj->attributes)
199 sdb_avltree_destroy(sobj->attributes);
200 } /* service_destroy */
202 static int
203 metric_init(sdb_object_t *obj, va_list ap)
204 {
205 sdb_metric_t *sobj = METRIC(obj);
206 int ret;
208 /* this will consume the first argument (type) of ap */
209 ret = store_obj_init(obj, ap);
210 if (ret)
211 return ret;
213 sobj->attributes = sdb_avltree_create();
214 if (! sobj->attributes)
215 return -1;
217 sobj->store.type = sobj->store.id = NULL;
218 return 0;
219 } /* metric_init */
221 static void
222 metric_destroy(sdb_object_t *obj)
223 {
224 sdb_metric_t *sobj = METRIC(obj);
225 assert(obj);
227 store_obj_destroy(obj);
229 if (sobj->attributes)
230 sdb_avltree_destroy(sobj->attributes);
232 if (sobj->store.type)
233 free(sobj->store.type);
234 if (sobj->store.id)
235 free(sobj->store.id);
236 } /* metric_destroy */
238 static int
239 attr_init(sdb_object_t *obj, va_list ap)
240 {
241 const sdb_data_t *value;
242 int ret;
244 /* this will consume the first two arguments
245 * (type and last_update) of ap */
246 ret = store_obj_init(obj, ap);
247 if (ret)
248 return ret;
249 value = va_arg(ap, const sdb_data_t *);
251 if (value)
252 if (sdb_data_copy(&ATTR(obj)->value, value))
253 return -1;
254 return 0;
255 } /* attr_init */
257 static void
258 attr_destroy(sdb_object_t *obj)
259 {
260 assert(obj);
262 store_obj_destroy(obj);
263 sdb_data_free_datum(&ATTR(obj)->value);
264 } /* attr_destroy */
266 static sdb_type_t store_type = {
267 /* size = */ sizeof(sdb_store_t),
268 /* init = */ store_init,
269 /* destroy = */ store_destroy,
270 };
272 static sdb_type_t host_type = {
273 /* size = */ sizeof(host_t),
274 /* init = */ host_init,
275 /* destroy = */ host_destroy
276 };
278 static sdb_type_t service_type = {
279 /* size = */ sizeof(service_t),
280 /* init = */ service_init,
281 /* destroy = */ service_destroy
282 };
284 static sdb_type_t metric_type = {
285 /* size = */ sizeof(sdb_metric_t),
286 /* init = */ metric_init,
287 /* destroy = */ metric_destroy
288 };
290 static sdb_type_t attribute_type = {
291 /* size = */ sizeof(attr_t),
292 /* init = */ attr_init,
293 /* destroy = */ attr_destroy
294 };
296 /*
297 * private helper functions
298 */
300 static int
301 record_backend(sdb_store_obj_t *obj)
302 {
303 const sdb_plugin_info_t *info;
304 char **tmp;
305 size_t i;
307 info = sdb_plugin_current();
308 if (! info)
309 return 0;
311 for (i = 0; i < obj->backends_num; ++i)
312 if (!strcasecmp(obj->backends[i], info->plugin_name))
313 return 0;
315 tmp = realloc(obj->backends,
316 (obj->backends_num + 1) * sizeof(*obj->backends));
317 if (! tmp)
318 return -1;
320 obj->backends = tmp;
321 obj->backends[obj->backends_num] = strdup(info->plugin_name);
322 if (! obj->backends[obj->backends_num])
323 return -1;
325 ++obj->backends_num;
326 return 0;
327 } /* record_backend */
329 static int
330 store_obj(sdb_store_obj_t *parent, sdb_avltree_t *parent_tree,
331 int type, const char *name, sdb_time_t last_update,
332 sdb_store_obj_t **updated_obj)
333 {
334 sdb_store_obj_t *old, *new;
335 int status = 0;
337 assert(parent_tree);
339 if (last_update <= 0)
340 last_update = sdb_gettime();
342 old = STORE_OBJ(sdb_avltree_lookup(parent_tree, name));
343 if (old) {
344 if (old->last_update > last_update) {
345 sdb_log(SDB_LOG_DEBUG, "store: Cannot update %s '%s' - "
346 "value too old (%"PRIsdbTIME" < %"PRIsdbTIME")",
347 SDB_STORE_TYPE_TO_NAME(type), name,
348 last_update, old->last_update);
349 /* don't report an error; the object may be updated by multiple
350 * backends */
351 status = 1;
352 }
353 else if (old->last_update == last_update) {
354 /* don't report an error and also don't even log this to avoid
355 * excessive noise on high sampling frequencies */
356 status = 1;
357 }
358 else {
359 sdb_time_t interval = last_update - old->last_update;
360 old->last_update = last_update;
361 if (interval) {
362 if (old->interval)
363 old->interval = (sdb_time_t)((0.9 * (double)old->interval)
364 + (0.1 * (double)interval));
365 else
366 old->interval = interval;
367 }
368 }
370 new = old;
371 sdb_object_deref(SDB_OBJ(old));
372 }
373 else {
374 if (type == SDB_ATTRIBUTE) {
375 /* the value will be updated by the caller */
376 new = STORE_OBJ(sdb_object_create(name, attribute_type,
377 type, last_update, NULL));
378 }
379 else {
380 sdb_type_t t;
381 t = type == SDB_HOST
382 ? host_type
383 : type == SDB_SERVICE
384 ? service_type
385 : metric_type;
386 new = STORE_OBJ(sdb_object_create(name, t, type, last_update));
387 }
389 if (new) {
390 status = sdb_avltree_insert(parent_tree, SDB_OBJ(new));
392 /* pass control to the tree or destroy in case of an error */
393 sdb_object_deref(SDB_OBJ(new));
394 }
395 else {
396 char errbuf[1024];
397 sdb_log(SDB_LOG_ERR, "store: Failed to create %s '%s': %s",
398 SDB_STORE_TYPE_TO_NAME(type), name,
399 sdb_strerror(errno, errbuf, sizeof(errbuf)));
400 status = -1;
401 }
402 }
404 if (status < 0)
405 return status;
406 assert(new);
408 if (new->parent != parent) {
409 // Avoid circular self-references which are not handled
410 // correctly by the ref-count based management layer.
411 //sdb_object_deref(SDB_OBJ(new->parent));
412 //sdb_object_ref(SDB_OBJ(parent));
413 new->parent = parent;
414 }
416 if (updated_obj)
417 *updated_obj = new;
419 if (record_backend(new))
420 return -1;
421 return status;
422 } /* store_obj */
424 static int
425 store_metric_store(sdb_metric_t *metric, sdb_store_metric_t *m)
426 {
427 char *type = metric->store.type;
428 char *id = metric->store.id;
430 if ((! metric->store.type) || strcasecmp(metric->store.type, m->store.type)) {
431 if (! (type = strdup(m->store.type)))
432 return -1;
433 }
434 if ((! metric->store.id) || strcasecmp(metric->store.id, m->store.id)) {
435 if (! (id = strdup(m->store.id))) {
436 if (type != metric->store.type)
437 free(type);
438 return -1;
439 }
440 }
442 if (type != metric->store.type) {
443 if (metric->store.type)
444 free(metric->store.type);
445 metric->store.type = type;
446 }
447 if (id != metric->store.id) {
448 if (metric->store.id)
449 free(metric->store.id);
450 metric->store.id = id;
451 }
452 return 0;
453 } /* store_metric_store */
455 /* The store's host_lock has to be acquired before calling this function. */
456 static sdb_avltree_t *
457 get_host_children(host_t *host, int type)
458 {
459 if ((type != SDB_SERVICE) && (type != SDB_METRIC)
460 && (type != SDB_ATTRIBUTE))
461 return NULL;
463 if (! host)
464 return NULL;
466 if (type == SDB_ATTRIBUTE)
467 return host->attributes;
468 else if (type == SDB_METRIC)
469 return host->metrics;
470 else
471 return host->services;
472 } /* get_host_children */
474 /*
475 * ts_tojson serializes a time-series to JSON.
476 *
477 * The function never returns an error. Rather, an error message will be part
478 * of the serialized data.
479 */
480 static void
481 ts_tojson(sdb_timeseries_t *ts, sdb_strbuf_t *buf)
482 {
483 char start_str[64];
484 char end_str[64];
486 size_t i;
488 /* TODO: make time format configurable */
489 if (! sdb_strftime(start_str, sizeof(start_str), ts->start))
490 snprintf(start_str, sizeof(start_str), "<error>");
491 start_str[sizeof(start_str) - 1] = '\0';
492 if (! sdb_strftime(end_str, sizeof(end_str), ts->end))
493 snprintf(end_str, sizeof(end_str), "<error>");
494 end_str[sizeof(end_str) - 1] = '\0';
496 sdb_strbuf_append(buf, "{\"start\": \"%s\", \"end\": \"%s\", \"data\": {",
497 start_str, end_str);
499 for (i = 0; i < ts->data_names_len; ++i) {
500 size_t j;
501 sdb_strbuf_append(buf, "\"%s\": [", ts->data_names[i]);
503 for (j = 0; j < ts->data_len; ++j) {
504 char time_str[64];
506 if (! sdb_strftime(time_str, sizeof(time_str), ts->data[i][j].timestamp))
507 snprintf(time_str, sizeof(time_str), "<error>");
508 time_str[sizeof(time_str) - 1] = '\0';
510 /* Some GNU libc versions may print '-nan' which we dont' want */
511 if (isnan(ts->data[i][j].value))
512 sdb_strbuf_append(buf, "{\"timestamp\": \"%s\", "
513 "\"value\": \"nan\"}", time_str);
514 else
515 sdb_strbuf_append(buf, "{\"timestamp\": \"%s\", "
516 "\"value\": \"%f\"}", time_str, ts->data[i][j].value);
518 if (j < ts->data_len - 1)
519 sdb_strbuf_append(buf, ",");
520 }
522 if (i < ts->data_names_len - 1)
523 sdb_strbuf_append(buf, "],");
524 else
525 sdb_strbuf_append(buf, "]");
526 }
527 sdb_strbuf_append(buf, "}}");
528 } /* ts_tojson */
530 /*
531 * store writer API
532 */
534 static int
535 store_attribute(sdb_store_attribute_t *attr, sdb_object_t *user_data)
536 {
537 sdb_store_t *st = SDB_STORE(user_data);
538 sdb_store_obj_t *parent = NULL;
539 sdb_store_obj_t *new = NULL;
540 const char *hostname;
541 host_t *host;
543 sdb_avltree_t *children = NULL;
544 sdb_avltree_t *attributes;
545 int status = 0;
547 if ((! attr) || (! attr->parent) || (! attr->key))
548 return -1;
550 hostname = attr->hostname;
551 if (attr->parent_type == SDB_HOST)
552 hostname = attr->parent;
553 if (! hostname)
554 return -1;
556 pthread_rwlock_wrlock(&st->host_lock);
557 host = HOST(sdb_avltree_lookup(st->hosts, hostname));
558 if (! host) {
559 sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' - "
560 "host '%s' not found", attr->key, hostname);
561 status = -1;
562 }
564 switch (attr->parent_type) {
565 case SDB_HOST:
566 parent = STORE_OBJ(host);
567 attributes = get_host_children(host, SDB_ATTRIBUTE);
568 break;
569 case SDB_SERVICE:
570 children = get_host_children(host, SDB_SERVICE);
571 break;
572 case SDB_METRIC:
573 children = get_host_children(host, SDB_METRIC);
574 break;
575 default:
576 status = -1;
577 break;
578 }
580 if (children) {
581 parent = STORE_OBJ(sdb_avltree_lookup(children, attr->parent));
582 if (! parent) {
583 sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' - "
584 "%s '%s/%s' not found", attr->key,
585 SDB_STORE_TYPE_TO_NAME(attr->parent_type),
586 attr->hostname, attr->parent);
587 status = -1;
588 }
589 else
590 attributes = attr->parent_type == SDB_SERVICE
591 ? SVC(parent)->attributes
592 : METRIC(parent)->attributes;
593 }
595 if (! status)
596 status = store_obj(parent, attributes, SDB_ATTRIBUTE,
597 attr->key, attr->last_update, &new);
599 if (! status) {
600 assert(new);
601 /* update the value if it changed */
602 if (sdb_data_cmp(&ATTR(new)->value, &attr->value))
603 if (sdb_data_copy(&ATTR(new)->value, &attr->value))
604 status = -1;
605 }
607 if (parent != STORE_OBJ(host))
608 sdb_object_deref(SDB_OBJ(parent));
609 sdb_object_deref(SDB_OBJ(host));
610 pthread_rwlock_unlock(&st->host_lock);
612 return status;
613 } /* store_attribute */
615 static int
616 store_host(sdb_store_host_t *host, sdb_object_t *user_data)
617 {
618 sdb_store_t *st = SDB_STORE(user_data);
619 int status = 0;
621 if ((! host) || (! host->name))
622 return -1;
624 pthread_rwlock_wrlock(&st->host_lock);
625 status = store_obj(NULL, st->hosts,
626 SDB_HOST, host->name, host->last_update, NULL);
627 pthread_rwlock_unlock(&st->host_lock);
629 return status;
630 } /* store_host */
632 static int
633 store_service(sdb_store_service_t *service, sdb_object_t *user_data)
634 {
635 sdb_store_t *st = SDB_STORE(user_data);
637 host_t *host;
638 sdb_avltree_t *services;
640 int status = 0;
642 if ((! service) || (! service->hostname) || (! service->name))
643 return -1;
645 pthread_rwlock_wrlock(&st->host_lock);
646 host = HOST(sdb_avltree_lookup(st->hosts, service->hostname));
647 services = get_host_children(host, SDB_SERVICE);
648 if (! services) {
649 sdb_log(SDB_LOG_ERR, "store: Failed to store service '%s' - "
650 "host '%s' not found", service->name, service->hostname);
651 status = -1;
652 }
654 if (! status)
655 status = store_obj(STORE_OBJ(host), services, SDB_SERVICE,
656 service->name, service->last_update, NULL);
658 sdb_object_deref(SDB_OBJ(host));
659 pthread_rwlock_unlock(&st->host_lock);
660 return status;
661 } /* store_service */
663 static int
664 store_metric(sdb_store_metric_t *metric, sdb_object_t *user_data)
665 {
666 sdb_store_t *st = SDB_STORE(user_data);
668 sdb_store_obj_t *obj = NULL;
669 sdb_avltree_t *metrics;
670 host_t *host;
672 int status = 0;
674 if ((! metric) || (! metric->hostname) || (! metric->name))
675 return -1;
677 if ((metric->store.type != NULL) != (metric->store.id != NULL))
678 return -1;
680 pthread_rwlock_wrlock(&st->host_lock);
681 host = HOST(sdb_avltree_lookup(st->hosts, metric->hostname));
682 metrics = get_host_children(host, SDB_METRIC);
683 if (! metrics) {
684 sdb_log(SDB_LOG_ERR, "store: Failed to store metric '%s' - "
685 "host '%s' not found", metric->name, metric->hostname);
686 status = -1;
687 }
689 if (! status)
690 status = store_obj(STORE_OBJ(host), metrics, SDB_METRIC,
691 metric->name, metric->last_update, &obj);
692 sdb_object_deref(SDB_OBJ(host));
694 if (status) {
695 pthread_rwlock_unlock(&st->host_lock);
696 return status;
697 }
699 assert(obj);
700 if (metric->store.type && metric->store.id)
701 if (store_metric_store(METRIC(obj), metric))
702 status = -1;
703 pthread_rwlock_unlock(&st->host_lock);
704 return status;
705 } /* store_metric */
707 sdb_store_writer_t sdb_store_writer = {
708 store_host, store_service, store_metric, store_attribute,
709 };
711 static sdb_object_t *
712 prepare_query(sdb_ast_node_t *ast,
713 sdb_strbuf_t __attribute__((unused)) *errbuf,
714 sdb_object_t __attribute__((unused)) *user_data)
715 {
716 return SDB_OBJ(sdb_store_query_prepare(ast));
717 } /* prepare_query */
719 static int
720 execute_query(sdb_object_t *q,
721 sdb_strbuf_t *buf, sdb_strbuf_t *errbuf,
722 sdb_object_t *user_data)
723 {
724 return sdb_store_query_execute(SDB_STORE(user_data),
725 QUERY(q), buf, errbuf);
726 } /* execute_query */
728 sdb_store_reader_t sdb_store_reader = {
729 prepare_query, execute_query,
730 };
732 /*
733 * public API
734 */
736 sdb_store_t *
737 sdb_store_create(void)
738 {
739 return SDB_STORE(sdb_object_create("store", store_type));
740 } /* sdb_store_create */
742 int
743 sdb_store_host(sdb_store_t *store, const char *name, sdb_time_t last_update)
744 {
745 sdb_store_host_t host = {
746 name, last_update, 0, NULL, 0,
747 };
748 return store_host(&host, SDB_OBJ(store));
749 } /* sdb_store_host */
751 int
752 sdb_store_service(sdb_store_t *store, const char *hostname, const char *name,
753 sdb_time_t last_update)
754 {
755 sdb_store_service_t service = {
756 hostname, name, last_update, 0, NULL, 0,
757 };
758 return store_service(&service, SDB_OBJ(store));
759 } /* sdb_store_service */
761 int
762 sdb_store_metric(sdb_store_t *store, const char *hostname, const char *name,
763 sdb_metric_store_t *metric_store, sdb_time_t last_update)
764 {
765 sdb_store_metric_t metric = {
766 hostname, name, { NULL, NULL }, last_update, 0, NULL, 0,
767 };
768 if (metric_store) {
769 metric.store.type = metric_store->type;
770 metric.store.id = metric_store->id;
771 }
772 return store_metric(&metric, SDB_OBJ(store));
773 } /* sdb_store_metric */
775 int
776 sdb_store_attribute(sdb_store_t *store, const char *hostname,
777 const char *key, const sdb_data_t *value, sdb_time_t last_update)
778 {
779 sdb_store_attribute_t attr = {
780 NULL, SDB_HOST, hostname, key, SDB_DATA_INIT, last_update, 0, NULL, 0,
781 };
782 if (value) {
783 attr.value = *value;
784 }
785 return store_attribute(&attr, SDB_OBJ(store));
786 } /* sdb_store_attribute */
788 int
789 sdb_store_service_attr(sdb_store_t *store, const char *hostname,
790 const char *service, const char *key, const sdb_data_t *value,
791 sdb_time_t last_update)
792 {
793 sdb_store_attribute_t attr = {
794 hostname, SDB_SERVICE, service, key, SDB_DATA_INIT, last_update, 0, NULL, 0,
795 };
796 if (value) {
797 attr.value = *value;
798 }
799 return store_attribute(&attr, SDB_OBJ(store));
800 } /* sdb_store_service_attr */
802 int
803 sdb_store_metric_attr(sdb_store_t *store, const char *hostname,
804 const char *metric, const char *key, const sdb_data_t *value,
805 sdb_time_t last_update)
806 {
807 sdb_store_attribute_t attr = {
808 hostname, SDB_METRIC, metric, key, SDB_DATA_INIT, last_update, 0, NULL, 0,
809 };
810 if (value) {
811 attr.value = *value;
812 }
813 return store_attribute(&attr, SDB_OBJ(store));
814 } /* sdb_store_metric_attr */
816 sdb_store_obj_t *
817 sdb_store_get_host(sdb_store_t *store, const char *name)
818 {
819 host_t *host;
821 if ((! store) || (! name))
822 return NULL;
824 host = HOST(sdb_avltree_lookup(store->hosts, name));
825 if (! host)
826 return NULL;
828 return STORE_OBJ(host);
829 } /* sdb_store_get_host */
831 sdb_store_obj_t *
832 sdb_store_get_child(sdb_store_obj_t *host, int type, const char *name)
833 {
834 sdb_avltree_t *children;
836 if ((! host) || (host->type != SDB_HOST) || (! name))
837 return NULL;
839 children = get_host_children(HOST(host), type);
840 if (! children)
841 return NULL;
842 return STORE_OBJ(sdb_avltree_lookup(children, name));
843 } /* sdb_store_get_child */
845 int
846 sdb_store_get_field(sdb_store_obj_t *obj, int field, sdb_data_t *res)
847 {
848 sdb_data_t tmp;
850 if (! obj)
851 return -1;
853 switch (field) {
854 case SDB_FIELD_NAME:
855 tmp.type = SDB_TYPE_STRING;
856 tmp.data.string = strdup(SDB_OBJ(obj)->name);
857 if (! tmp.data.string)
858 return -1;
859 break;
860 case SDB_FIELD_LAST_UPDATE:
861 tmp.type = SDB_TYPE_DATETIME;
862 tmp.data.datetime = obj->last_update;
863 break;
864 case SDB_FIELD_AGE:
865 tmp.type = SDB_TYPE_DATETIME;
866 tmp.data.datetime = sdb_gettime() - obj->last_update;
867 break;
868 case SDB_FIELD_INTERVAL:
869 tmp.type = SDB_TYPE_DATETIME;
870 tmp.data.datetime = obj->interval;
871 break;
872 case SDB_FIELD_BACKEND:
873 if (! res)
874 return 0;
875 tmp.type = SDB_TYPE_ARRAY | SDB_TYPE_STRING;
876 tmp.data.array.length = obj->backends_num;
877 tmp.data.array.values = obj->backends;
878 return sdb_data_copy(res, &tmp);
879 case SDB_FIELD_VALUE:
880 if (obj->type != SDB_ATTRIBUTE)
881 return -1;
882 if (! res)
883 return 0;
884 return sdb_data_copy(res, &ATTR(obj)->value);
885 case SDB_FIELD_TIMESERIES:
886 if (obj->type != SDB_METRIC)
887 return -1;
888 tmp.type = SDB_TYPE_BOOLEAN;
889 tmp.data.boolean = METRIC(obj)->store.type != NULL;
890 default:
891 return -1;
892 }
893 if (res)
894 *res = tmp;
895 else
896 sdb_data_free_datum(&tmp);
897 return 0;
898 } /* sdb_store_get_field */
900 int
901 sdb_store_get_attr(sdb_store_obj_t *obj, const char *name, sdb_data_t *res,
902 sdb_store_matcher_t *filter)
903 {
904 sdb_avltree_t *tree = NULL;
905 sdb_store_obj_t *attr;
907 if ((! obj) || (! name))
908 return -1;
910 if (obj->type == SDB_HOST)
911 tree = HOST(obj)->attributes;
912 else if (obj->type == SDB_SERVICE)
913 tree = SVC(obj)->attributes;
914 else if (obj->type == SDB_METRIC)
915 tree = METRIC(obj)->attributes;
917 if (! tree)
918 return -1;
920 attr = STORE_OBJ(sdb_avltree_lookup(tree, name));
921 if (! attr)
922 return -1;
923 if (filter && (! sdb_store_matcher_matches(filter, attr, NULL))) {
924 sdb_object_deref(SDB_OBJ(attr));
925 return -1;
926 }
928 assert(STORE_OBJ(attr)->type == SDB_ATTRIBUTE);
929 if (res)
930 sdb_data_copy(res, &ATTR(attr)->value);
931 sdb_object_deref(SDB_OBJ(attr));
932 return 0;
933 } /* sdb_store_get_attr */
935 /* TODO: sdb_store_fetch_timeseries should move into the plugin module */
937 int
938 sdb_store_fetch_timeseries(sdb_store_t *store,
939 const char *hostname, const char *metric,
940 sdb_timeseries_opts_t *opts, sdb_strbuf_t *buf)
941 {
942 sdb_avltree_t *metrics;
943 host_t *host;
944 sdb_metric_t *m;
946 sdb_timeseries_t *ts;
948 int status = 0;
950 if ((! store) || (! hostname) || (! metric) || (! opts) || (! buf))
951 return -1;
953 pthread_rwlock_rdlock(&store->host_lock);
954 host = HOST(sdb_avltree_lookup(store->hosts, hostname));
955 metrics = get_host_children(host, SDB_METRIC);
956 sdb_object_deref(SDB_OBJ(host));
957 if (! metrics) {
958 sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
959 "- host '%s' not found", hostname, metric, hostname);
960 pthread_rwlock_unlock(&store->host_lock);
961 return -1;
962 }
964 m = METRIC(sdb_avltree_lookup(metrics, metric));
965 if (! m) {
966 sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
967 "- metric '%s' not found", hostname, metric, metric);
968 pthread_rwlock_unlock(&store->host_lock);
969 return -1;
970 }
972 if ((! m->store.type) || (! m->store.id)) {
973 sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
974 "- no data-store configured for the stored metric",
975 hostname, metric);
976 sdb_object_deref(SDB_OBJ(m));
977 pthread_rwlock_unlock(&store->host_lock);
978 return -1;
979 }
981 {
982 char type[strlen(m->store.type) + 1];
983 char id[strlen(m->store.id) + 1];
985 strncpy(type, m->store.type, sizeof(type));
986 strncpy(id, m->store.id, sizeof(id));
987 pthread_rwlock_unlock(&store->host_lock);
989 ts = sdb_plugin_fetch_timeseries(type, id, opts);
990 if (! ts) {
991 sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
992 "- %s fetcher callback returned no data for '%s'",
993 hostname, metric, type, id);
994 status = -1;
995 }
996 }
998 ts_tojson(ts, buf);
999 sdb_object_deref(SDB_OBJ(m));
1000 sdb_timeseries_destroy(ts);
1001 return status;
1002 } /* sdb_store_fetch_timeseries */
1004 int
1005 sdb_store_scan(sdb_store_t *store, int type,
1006 sdb_store_matcher_t *m, sdb_store_matcher_t *filter,
1007 sdb_store_lookup_cb cb, void *user_data)
1008 {
1009 sdb_avltree_iter_t *host_iter = NULL;
1010 int status = 0;
1012 if ((! store) || (! cb))
1013 return -1;
1015 if ((type != SDB_HOST) && (type != SDB_SERVICE) && (type != SDB_METRIC)) {
1016 sdb_log(SDB_LOG_ERR, "store: Cannot scan objects of type %d", type);
1017 return -1;
1018 }
1020 pthread_rwlock_rdlock(&store->host_lock);
1021 host_iter = sdb_avltree_get_iter(store->hosts);
1022 if (! host_iter)
1023 status = -1;
1025 /* has_next returns false if the iterator is NULL */
1026 while (sdb_avltree_iter_has_next(host_iter)) {
1027 sdb_store_obj_t *host;
1028 sdb_avltree_iter_t *iter = NULL;
1030 host = STORE_OBJ(sdb_avltree_iter_get_next(host_iter));
1031 assert(host);
1033 if (! sdb_store_matcher_matches(filter, host, NULL))
1034 continue;
1036 if (type == SDB_SERVICE)
1037 iter = sdb_avltree_get_iter(HOST(host)->services);
1038 else if (type == SDB_METRIC)
1039 iter = sdb_avltree_get_iter(HOST(host)->metrics);
1041 if (iter) {
1042 while (sdb_avltree_iter_has_next(iter)) {
1043 sdb_store_obj_t *obj;
1044 obj = STORE_OBJ(sdb_avltree_iter_get_next(iter));
1045 assert(obj);
1047 if (sdb_store_matcher_matches(m, obj, filter)) {
1048 if (cb(obj, filter, user_data)) {
1049 sdb_log(SDB_LOG_ERR, "store: Callback returned "
1050 "an error while scanning");
1051 status = -1;
1052 break;
1053 }
1054 }
1055 }
1056 }
1057 else if (sdb_store_matcher_matches(m, host, filter)) {
1058 if (cb(host, filter, user_data)) {
1059 sdb_log(SDB_LOG_ERR, "store: Callback returned "
1060 "an error while scanning");
1061 status = -1;
1062 }
1063 }
1065 sdb_avltree_iter_destroy(iter);
1066 if (status)
1067 break;
1068 }
1070 sdb_avltree_iter_destroy(host_iter);
1071 pthread_rwlock_unlock(&store->host_lock);
1072 return status;
1073 } /* sdb_store_scan */
1075 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */