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diff --git a/src/core/store.c b/src/core/store.c
index 401780e054bad02bf160bb807a971f02af0808a7..7671e9800f13a0ac0a81e2b24817d95b0f0a83ef 100644 (file)
--- a/src/core/store.c
+++ b/src/core/store.c
#include <stdlib.h>
#include <string.h>
+#include <math.h>
#include <pthread.h>
/*
* private variables
*/
-static sdb_avltree_t *hosts = NULL;
-static pthread_rwlock_t host_lock = PTHREAD_RWLOCK_INITIALIZER;
+typedef struct {
+ sdb_object_t super;
+
+ /* hosts are the top-level entries and
+ * reference everything else */
+ sdb_avltree_t *hosts;
+ pthread_rwlock_t host_lock;
+} sdb_store_t;
+#define ST(obj) ((sdb_store_t *)(obj))
+
+sdb_store_t *global_store = NULL;
/*
* private types
*/
-static sdb_type_t sdb_host_type;
-static sdb_type_t sdb_service_type;
-static sdb_type_t sdb_metric_type;
-static sdb_type_t sdb_attribute_type;
+static sdb_type_t host_type;
+static sdb_type_t service_type;
+static sdb_type_t metric_type;
+static sdb_type_t attribute_type;
+
+static int
+store_init(sdb_object_t *obj, va_list __attribute__((unused)) ap)
+{
+ int err;
+ if (! (ST(obj)->hosts = sdb_avltree_create()))
+ return -1;
+ if ((err = pthread_rwlock_init(&ST(obj)->host_lock, /* attr = */ NULL))) {
+ char errbuf[128];
+ sdb_log(SDB_LOG_ERR, "store: Failed to initialize lock: %s",
+ sdb_strerror(err, errbuf, sizeof(errbuf)));
+ return -1;
+ }
+ return 0;
+} /* store_init */
+
+static void
+store_destroy(sdb_object_t *obj)
+{
+ int err;
+ if ((err = pthread_rwlock_destroy(&ST(obj)->host_lock))) {
+ char errbuf[128];
+ sdb_log(SDB_LOG_ERR, "store: Failed to destroy lock: %s",
+ sdb_strerror(err, errbuf, sizeof(errbuf)));
+ return;
+ }
+ sdb_avltree_destroy(ST(obj)->hosts);
+ ST(obj)->hosts = NULL;
+} /* store_destroy */
static int
store_obj_init(sdb_object_t *obj, va_list ap)
sobj->backends = NULL;
sobj->backends_num = 0;
- if (sobj->parent)
- sdb_object_deref(SDB_OBJ(sobj->parent));
+ // We don't currently keep an extra reference for parent objects to
+ // avoid circular self-references which are not handled correctly by
+ // the ref-count base management layer.
+ //sdb_object_deref(SDB_OBJ(sobj->parent));
} /* store_obj_destroy */
static int
-sdb_host_init(sdb_object_t *obj, va_list ap)
+host_init(sdb_object_t *obj, va_list ap)
{
sdb_host_t *sobj = HOST(obj);
int ret;
if (! sobj->attributes)
return -1;
return 0;
-} /* sdb_host_init */
+} /* host_init */
static void
-sdb_host_destroy(sdb_object_t *obj)
+host_destroy(sdb_object_t *obj)
{
sdb_host_t *sobj = HOST(obj);
assert(obj);
sdb_avltree_destroy(sobj->metrics);
if (sobj->attributes)
sdb_avltree_destroy(sobj->attributes);
-} /* sdb_host_destroy */
+} /* host_destroy */
static int
-sdb_service_init(sdb_object_t *obj, va_list ap)
+service_init(sdb_object_t *obj, va_list ap)
{
sdb_service_t *sobj = SVC(obj);
int ret;
if (! sobj->attributes)
return -1;
return 0;
-} /* sdb_service_init */
+} /* service_init */
static void
-sdb_service_destroy(sdb_object_t *obj)
+service_destroy(sdb_object_t *obj)
{
sdb_service_t *sobj = SVC(obj);
assert(obj);
if (sobj->attributes)
sdb_avltree_destroy(sobj->attributes);
-} /* sdb_service_destroy */
+} /* service_destroy */
static int
-sdb_metric_init(sdb_object_t *obj, va_list ap)
+metric_init(sdb_object_t *obj, va_list ap)
{
sdb_metric_t *sobj = METRIC(obj);
int ret;
sobj->store.type = sobj->store.id = NULL;
return 0;
-} /* sdb_metric_init */
+} /* metric_init */
static void
-sdb_metric_destroy(sdb_object_t *obj)
+metric_destroy(sdb_object_t *obj)
{
sdb_metric_t *sobj = METRIC(obj);
assert(obj);
free(sobj->store.type);
if (sobj->store.id)
free(sobj->store.id);
-} /* sdb_metric_destroy */
+} /* metric_destroy */
static int
-sdb_attr_init(sdb_object_t *obj, va_list ap)
+attr_init(sdb_object_t *obj, va_list ap)
{
const sdb_data_t *value;
int ret;
if (sdb_data_copy(&ATTR(obj)->value, value))
return -1;
return 0;
-} /* sdb_attr_init */
+} /* attr_init */
static void
-sdb_attr_destroy(sdb_object_t *obj)
+attr_destroy(sdb_object_t *obj)
{
assert(obj);
store_obj_destroy(obj);
sdb_data_free_datum(&ATTR(obj)->value);
-} /* sdb_attr_destroy */
+} /* attr_destroy */
+
+static sdb_type_t store_type = {
+ /* size = */ sizeof(sdb_store_t),
+ /* init = */ store_init,
+ /* destroy = */ store_destroy,
+};
-static sdb_type_t sdb_host_type = {
- sizeof(sdb_host_t),
- sdb_host_init,
- sdb_host_destroy
+static sdb_type_t host_type = {
+ /* size = */ sizeof(sdb_host_t),
+ /* init = */ host_init,
+ /* destroy = */ host_destroy
};
-static sdb_type_t sdb_service_type = {
- sizeof(sdb_service_t),
- sdb_service_init,
- sdb_service_destroy
+static sdb_type_t service_type = {
+ /* size = */ sizeof(sdb_service_t),
+ /* init = */ service_init,
+ /* destroy = */ service_destroy
};
-static sdb_type_t sdb_metric_type = {
- sizeof(sdb_metric_t),
- sdb_metric_init,
- sdb_metric_destroy
+static sdb_type_t metric_type = {
+ /* size = */ sizeof(sdb_metric_t),
+ /* init = */ metric_init,
+ /* destroy = */ metric_destroy
};
-static sdb_type_t sdb_attribute_type = {
- sizeof(sdb_attribute_t),
- sdb_attr_init,
- sdb_attr_destroy
+static sdb_type_t attribute_type = {
+ /* size = */ sizeof(sdb_attribute_t),
+ /* init = */ attr_init,
+ /* destroy = */ attr_destroy
};
/*
*/
static sdb_host_t *
-lookup_host(const char *name)
+lookup_host(sdb_store_t *st, const char *name, bool canonicalize)
{
- return HOST(sdb_avltree_lookup(hosts, name));
+ sdb_host_t *host;
+ char *cname;
+
+ assert(name);
+ if (! canonicalize)
+ return HOST(sdb_avltree_lookup(st->hosts, name));
+
+ cname = strdup(name);
+ cname = sdb_plugin_cname(cname);
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "store: strdup failed");
+ return NULL;
+ }
+
+ host = HOST(sdb_avltree_lookup(st->hosts, cname));
+ free(cname);
+ return host;
} /* lookup_host */
static int
} /* record_backend */
static int
-store_obj(sdb_avltree_t *parent_tree, int type, const char *name,
- sdb_time_t last_update, sdb_store_obj_t **updated_obj)
+store_obj(sdb_store_obj_t *parent, sdb_avltree_t *parent_tree,
+ int type, const char *name, sdb_time_t last_update,
+ sdb_store_obj_t **updated_obj)
{
sdb_store_obj_t *old, *new;
int status = 0;
else {
if (type == SDB_ATTRIBUTE) {
/* the value will be updated by the caller */
- new = STORE_OBJ(sdb_object_create(name, sdb_attribute_type,
+ new = STORE_OBJ(sdb_object_create(name, attribute_type,
type, last_update, NULL));
}
else {
sdb_type_t t;
t = type == SDB_HOST
- ? sdb_host_type
+ ? host_type
: type == SDB_SERVICE
- ? sdb_service_type
- : sdb_metric_type;
+ ? service_type
+ : metric_type;
new = STORE_OBJ(sdb_object_create(name, t, type, last_update));
}
return status;
assert(new);
+ if (new->parent != parent) {
+ // Avoid circular self-references which are not handled
+ // correctly by the ref-count based management layer.
+ //sdb_object_deref(SDB_OBJ(new->parent));
+ //sdb_object_ref(SDB_OBJ(parent));
+ new->parent = parent;
+ }
+
if (updated_obj)
*updated_obj = new;
} /* store_obj */
static int
-store_attr(sdb_avltree_t *attributes, const char *key, const sdb_data_t *value,
- sdb_time_t last_update)
+store_attr(sdb_store_obj_t *parent, sdb_avltree_t *attributes,
+ const char *key, const sdb_data_t *value, sdb_time_t last_update)
{
sdb_store_obj_t *attr = NULL;
int status;
- status = store_obj(attributes, SDB_ATTRIBUTE, key, last_update, &attr);
+ status = store_obj(parent, attributes, SDB_ATTRIBUTE,
+ key, last_update, &attr);
if (status)
return status;
@@ -394,32 +467,48 @@ store_attr(sdb_avltree_t *attributes, const char *key, const sdb_data_t *value,
return status;
} /* store_attr */
-/* The host_lock has to be acquired before calling this function. */
-static sdb_avltree_t *
-get_host_children(const char *hostname, int type)
+static int
+store_metric_store(sdb_metric_t *metric, sdb_metric_store_t *store)
{
- char *cname = NULL;
- sdb_host_t *host;
+ char *type = metric->store.type;
+ char *id = metric->store.id;
- assert(hostname);
- assert((type == SDB_SERVICE) || (type == SDB_METRIC)
- || (type == SDB_ATTRIBUTE));
+ if ((! metric->store.type) || strcasecmp(metric->store.type, store->type)) {
+ if (! (type = strdup(store->type)))
+ return -1;
+ }
+ if ((! metric->store.id) || strcasecmp(metric->store.id, store->id)) {
+ if (! (id = strdup(store->id))) {
+ if (type != metric->store.type)
+ free(type);
+ return -1;
+ }
+ }
- if (! hosts)
- return NULL;
+ if (type != metric->store.type) {
+ if (metric->store.type)
+ free(metric->store.type);
+ metric->store.type = type;
+ }
+ if (id != metric->store.id) {
+ if (metric->store.id)
+ free(metric->store.id);
+ metric->store.id = id;
+ }
+ return 0;
+} /* store_metric_store */
- cname = sdb_plugin_cname(strdup(hostname));
- if (! cname) {
- sdb_log(SDB_LOG_ERR, "store: strdup failed");
+/* The store's host_lock has to be acquired before calling this function. */
+static sdb_avltree_t *
+get_host_children(sdb_host_t *host, int type)
+{
+ if ((type != SDB_SERVICE) && (type != SDB_METRIC)
+ && (type != SDB_ATTRIBUTE))
return NULL;
- }
- host = lookup_host(cname);
- free(cname);
if (! host)
return NULL;
- sdb_object_deref(SDB_OBJ(host));
if (type == SDB_ATTRIBUTE)
return host->attributes;
else if (type == SDB_METRIC)
return host->services;
} /* get_host_children */
-/*
- * store_common_tojson serializes common object attributes to JSON.
- *
- * The function never returns an error. Rather, an error message will be part
- * of the serialized data.
- */
-static void
-store_common_tojson(sdb_store_obj_t *obj, sdb_strbuf_t *buf)
-{
- char time_str[64];
- char interval_str[64];
- size_t i;
-
- /* TODO: make time and interval formats configurable */
- if (! sdb_strftime(time_str, sizeof(time_str),
- "%F %T %z", obj->last_update))
- snprintf(time_str, sizeof(time_str), "<error>");
- time_str[sizeof(time_str) - 1] = '\0';
-
- if (! sdb_strfinterval(interval_str, sizeof(interval_str),
- obj->interval))
- snprintf(interval_str, sizeof(interval_str), "<error>");
- interval_str[sizeof(interval_str) - 1] = '\0';
-
- sdb_strbuf_append(buf, "\"last_update\": \"%s\", "
- "\"update_interval\": \"%s\", \"backends\": [",
- time_str, interval_str);
-
- for (i = 0; i < obj->backends_num; ++i) {
- sdb_strbuf_append(buf, "\"%s\"", obj->backends[i]);
- if (i < obj->backends_num - 1)
- sdb_strbuf_append(buf, ",");
- }
- sdb_strbuf_append(buf, "]");
-} /* store_common_tojson */
-
-/*
- * store_obj_tojson serializes attribute / metric / service objects to JSON.
- *
- * The function never returns an error. Rather, an error message will be part
- * of the serialized data.
- */
-static void
-store_obj_tojson(sdb_avltree_t *tree, int type, sdb_strbuf_t *buf,
- sdb_store_matcher_t *filter, int flags)
-{
- sdb_avltree_iter_t *iter;
-
- assert((type == SDB_ATTRIBUTE)
- || (type == SDB_METRIC)
- || (type == SDB_SERVICE));
-
- sdb_strbuf_append(buf, "[");
- iter = sdb_avltree_get_iter(tree);
- if (! iter) {
- char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "store: Failed to retrieve %ss: %s\n",
- SDB_STORE_TYPE_TO_NAME(type),
- sdb_strerror(errno, errbuf, sizeof(errbuf)));
- sdb_strbuf_append(buf, "{\"error\": \"failed to retrieve %ss: %s\"}",
- SDB_STORE_TYPE_TO_NAME(type), errbuf);
- }
-
- /* has_next returns false if the iterator is NULL */
- while (sdb_avltree_iter_has_next(iter)) {
- sdb_store_obj_t *sobj = STORE_OBJ(sdb_avltree_iter_get_next(iter));
- assert(sobj);
- assert(sobj->type == type);
-
- if (filter && (! sdb_store_matcher_matches(filter, sobj, NULL)))
- continue;
-
- sdb_strbuf_append(buf, "{\"name\": \"%s\", ", SDB_OBJ(sobj)->name);
- if (sobj->type == SDB_ATTRIBUTE) {
- char tmp[sdb_data_strlen(&ATTR(sobj)->value) + 1];
- sdb_data_format(&ATTR(sobj)->value, tmp, sizeof(tmp),
- SDB_DOUBLE_QUOTED);
- sdb_strbuf_append(buf, "\"value\": %s, ", tmp);
- }
- store_common_tojson(sobj, buf);
-
- if ((sobj->type == SDB_SERVICE)
- && (! (flags & SDB_SKIP_ATTRIBUTES))) {
- sdb_strbuf_append(buf, ", \"attributes\": ");
- store_obj_tojson(SVC(sobj)->attributes, SDB_ATTRIBUTE,
- buf, filter, flags);
- }
- else if ((sobj->type == SDB_METRIC)
- && (! (flags & SDB_SKIP_ATTRIBUTES))) {
- sdb_strbuf_append(buf, ", \"attributes\": ");
- store_obj_tojson(METRIC(sobj)->attributes, SDB_ATTRIBUTE,
- buf, filter, flags);
- }
- sdb_strbuf_append(buf, "}");
-
- if (sdb_avltree_iter_has_next(iter))
- sdb_strbuf_append(buf, ",");
- }
-
- sdb_avltree_iter_destroy(iter);
- sdb_strbuf_append(buf, "]");
-} /* store_obj_tojson */
-
/*
* ts_tojson serializes a time-series to JSON.
*
size_t i;
/* TODO: make time format configurable */
- if (! sdb_strftime(start_str, sizeof(start_str),
- "%F %T %z", ts->start))
+ if (! sdb_strftime(start_str, sizeof(start_str), ts->start))
snprintf(start_str, sizeof(start_str), "<error>");
start_str[sizeof(start_str) - 1] = '\0';
- if (! sdb_strftime(end_str, sizeof(end_str),
- "%F %T %z", ts->end))
+ if (! sdb_strftime(end_str, sizeof(end_str), ts->end))
snprintf(end_str, sizeof(end_str), "<error>");
end_str[sizeof(end_str) - 1] = '\0';
- sdb_strbuf_append(buf, "{\"start\": \"%s\", \"end\": \"%s\", {",
+ sdb_strbuf_append(buf, "{\"start\": \"%s\", \"end\": \"%s\", \"data\": {",
start_str, end_str);
for (i = 0; i < ts->data_names_len; ++i) {
for (j = 0; j < ts->data_len; ++j) {
char time_str[64];
- if (! sdb_strftime(time_str, sizeof(time_str),
- "%F %T %z", ts->data[i][j].timestamp))
+ if (! sdb_strftime(time_str, sizeof(time_str), ts->data[i][j].timestamp))
snprintf(time_str, sizeof(time_str), "<error>");
time_str[sizeof(time_str) - 1] = '\0';
- sdb_strbuf_append(buf, "{\"timestamp\": \"%s\", "
- "\"value\": \"%f\"}", time_str, ts->data[i][j].value);
+ /* Some GNU libc versions may print '-nan' which we dont' want */
+ if (isnan(ts->data[i][j].value))
+ sdb_strbuf_append(buf, "{\"timestamp\": \"%s\", "
+ "\"value\": \"nan\"}", time_str);
+ else
+ sdb_strbuf_append(buf, "{\"timestamp\": \"%s\", "
+ "\"value\": \"%f\"}", time_str, ts->data[i][j].value);
if (j < ts->data_len - 1)
sdb_strbuf_append(buf, ",");
} /* ts_tojson */
/*
- * public API
+ * store writer API
*/
-void
-sdb_store_clear(void)
-{
- sdb_avltree_destroy(hosts);
- hosts = NULL;
-} /* sdb_store_clear */
-
-int
-sdb_store_host(const char *name, sdb_time_t last_update)
-{
- char *cname = NULL;
- int status = 0;
-
- if (! name)
- return -1;
-
- cname = sdb_plugin_cname(strdup(name));
- if (! cname) {
- sdb_log(SDB_LOG_ERR, "store: strdup failed");
- return -1;
- }
-
- pthread_rwlock_wrlock(&host_lock);
- if (! hosts)
- if (! (hosts = sdb_avltree_create()))
- status = -1;
-
- if (! status)
- status = store_obj(hosts, SDB_HOST, cname, last_update, NULL);
- pthread_rwlock_unlock(&host_lock);
-
- free(cname);
- return status;
-} /* sdb_store_host */
-
-_Bool
-sdb_store_has_host(const char *name)
+static int
+store_attribute(const char *hostname,
+ const char *key, const sdb_data_t *value,
+ sdb_time_t last_update, sdb_object_t *user_data)
{
- sdb_host_t *host;
-
- if (! name)
- return NULL;
-
- host = lookup_host(name);
- return host != NULL;
-} /* sdb_store_has_host */
+ sdb_store_t *st = ST(user_data);
-sdb_store_obj_t *
-sdb_store_get_host(const char *name)
-{
sdb_host_t *host;
-
- if (! name)
- return NULL;
-
- host = lookup_host(name);
- if (! host)
- return NULL;
-
- return STORE_OBJ(host);
-} /* sdb_store_get_host */
-
-int
-sdb_store_attribute(const char *hostname,
- const char *key, const sdb_data_t *value,
- sdb_time_t last_update)
-{
sdb_avltree_t *attrs;
int status = 0;
if ((! hostname) || (! key))
return -1;
- pthread_rwlock_wrlock(&host_lock);
- attrs = get_host_children(hostname, SDB_ATTRIBUTE);
+ pthread_rwlock_wrlock(&st->host_lock);
+ host = lookup_host(st, hostname, /* canonicalize = */ 1);
+ attrs = get_host_children(host, SDB_ATTRIBUTE);
if (! attrs) {
sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' - "
"host '%s' not found", key, hostname);
}
if (! status)
- status = store_attr(attrs, key, value, last_update);
+ status = store_attr(STORE_OBJ(host), attrs, key, value, last_update);
+
+ sdb_object_deref(SDB_OBJ(host));
+ pthread_rwlock_unlock(&st->host_lock);
- pthread_rwlock_unlock(&host_lock);
return status;
-} /* sdb_store_attribute */
+} /* store_attribute */
-int
-sdb_store_service(const char *hostname, const char *name,
- sdb_time_t last_update)
+static int
+store_host(const char *name, sdb_time_t last_update, sdb_object_t *user_data)
{
- sdb_avltree_t *services;
+ sdb_store_t *st = ST(user_data);
+ char *cname = NULL;
int status = 0;
- if ((! hostname) || (! name))
+ if (! name)
return -1;
- pthread_rwlock_wrlock(&host_lock);
- services = get_host_children(hostname, SDB_SERVICE);
- if (! services) {
- sdb_log(SDB_LOG_ERR, "store: Failed to store service '%s' - "
- "host '%s' not found", name, hostname);
- status = -1;
+ cname = sdb_plugin_cname(strdup(name));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "store: strdup failed");
+ return -1;
}
- if (! status)
- status = store_obj(services, SDB_SERVICE, name, last_update, NULL);
- pthread_rwlock_unlock(&host_lock);
+ pthread_rwlock_wrlock(&st->host_lock);
+ status = store_obj(NULL, st->hosts,
+ SDB_HOST, cname, last_update, NULL);
+ pthread_rwlock_unlock(&st->host_lock);
+
+ free(cname);
return status;
-} /* sdb_store_service */
+} /* store_host */
-int
-sdb_store_service_attr(const char *hostname, const char *service,
- const char *key, const sdb_data_t *value, sdb_time_t last_update)
+static int
+store_service_attr(const char *hostname, const char *service,
+ const char *key, const sdb_data_t *value, sdb_time_t last_update,
+ sdb_object_t *user_data)
{
- sdb_avltree_t *services;
+ sdb_store_t *st = ST(user_data);
+
+ sdb_host_t *host;
sdb_service_t *svc;
+ sdb_avltree_t *services;
int status = 0;
if ((! hostname) || (! service) || (! key))
return -1;
- pthread_rwlock_wrlock(&host_lock);
- services = get_host_children(hostname, SDB_SERVICE);
+ pthread_rwlock_wrlock(&st->host_lock);
+ host = lookup_host(st, hostname, /* canonicalize = */ 1);
+ services = get_host_children(host, SDB_SERVICE);
+ sdb_object_deref(SDB_OBJ(host));
if (! services) {
sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' "
"for service '%s' - host '%ss' not found",
key, service, hostname);
- pthread_rwlock_unlock(&host_lock);
+ pthread_rwlock_unlock(&st->host_lock);
return -1;
}
}
if (! status)
- status = store_attr(svc->attributes, key, value, last_update);
+ status = store_attr(STORE_OBJ(svc), svc->attributes,
+ key, value, last_update);
sdb_object_deref(SDB_OBJ(svc));
- pthread_rwlock_unlock(&host_lock);
+ pthread_rwlock_unlock(&st->host_lock);
+
return status;
-} /* sdb_store_service_attr */
+} /* store_service_attr */
-int
-sdb_store_metric(const char *hostname, const char *name,
- sdb_metric_store_t *store, sdb_time_t last_update)
+static int
+store_service(const char *hostname, const char *name,
+ sdb_time_t last_update, sdb_object_t *user_data)
{
- sdb_store_obj_t *obj = NULL;
- sdb_metric_t *metric;
+ sdb_store_t *st = ST(user_data);
- sdb_avltree_t *metrics;
+ sdb_host_t *host;
+ sdb_avltree_t *services;
+ sdb_data_t d;
int status = 0;
if ((! hostname) || (! name))
return -1;
- if (store && ((! store->type) || (! store->id)))
- return -1;
- pthread_rwlock_wrlock(&host_lock);
- metrics = get_host_children(hostname, SDB_METRIC);
- if (! metrics) {
- sdb_log(SDB_LOG_ERR, "store: Failed to store metric '%s' - "
+ pthread_rwlock_wrlock(&st->host_lock);
+ host = lookup_host(st, hostname, /* canonicalize = */ 1);
+ services = get_host_children(host, SDB_SERVICE);
+ if (! services) {
+ sdb_log(SDB_LOG_ERR, "store: Failed to store service '%s' - "
"host '%s' not found", name, hostname);
status = -1;
}
if (! status)
- status = store_obj(metrics, SDB_METRIC, name, last_update, &obj);
-
- if (status || (! store)) {
- pthread_rwlock_unlock(&host_lock);
- return status;
- }
+ status = store_obj(STORE_OBJ(host), services, SDB_SERVICE,
+ name, last_update, NULL);
- assert(obj);
- metric = METRIC(obj);
+ sdb_object_deref(SDB_OBJ(host));
+ pthread_rwlock_unlock(&st->host_lock);
- if ((! metric->store.type) || strcasecmp(metric->store.type, store->type)) {
- if (metric->store.type)
- free(metric->store.type);
- metric->store.type = strdup(store->type);
- }
- if ((! metric->store.id) || strcasecmp(metric->store.id, store->id)) {
- if (metric->store.id)
- free(metric->store.id);
- metric->store.id = strdup(store->id);
- }
+ if (status)
+ return status;
- if ((! metric->store.type) || (! metric->store.id)) {
- if (metric->store.type)
- free(metric->store.type);
- if (metric->store.id)
- free(metric->store.id);
- metric->store.type = metric->store.id = NULL;
+ /* record the hostname as an attribute */
+ d.type = SDB_TYPE_STRING;
+ d.data.string = SDB_OBJ(host)->name;
+ if (store_service_attr(hostname, name, "hostname", &d, last_update, user_data))
status = -1;
- }
- pthread_rwlock_unlock(&host_lock);
return status;
-} /* sdb_store_metric */
+} /* store_service */
-int
-sdb_store_metric_attr(const char *hostname, const char *metric,
- const char *key, const sdb_data_t *value, sdb_time_t last_update)
+static int
+store_metric_attr(const char *hostname, const char *metric,
+ const char *key, const sdb_data_t *value, sdb_time_t last_update,
+ sdb_object_t *user_data)
{
+ sdb_store_t *st = ST(user_data);
+
sdb_avltree_t *metrics;
+ sdb_host_t *host;
sdb_metric_t *m;
int status = 0;
if ((! hostname) || (! metric) || (! key))
return -1;
- pthread_rwlock_wrlock(&host_lock);
- metrics = get_host_children(hostname, SDB_METRIC);
+ pthread_rwlock_wrlock(&st->host_lock);
+ host = lookup_host(st, hostname, /* canonicalize = */ 1);
+ metrics = get_host_children(host, SDB_METRIC);
+ sdb_object_deref(SDB_OBJ(host));
if (! metrics) {
sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' "
"for metric '%s' - host '%s' not found",
key, metric, hostname);
- pthread_rwlock_unlock(&host_lock);
+ pthread_rwlock_unlock(&st->host_lock);
return -1;
}
}
if (! status)
- status = store_attr(m->attributes, key, value, last_update);
+ status = store_attr(STORE_OBJ(m), m->attributes,
+ key, value, last_update);
sdb_object_deref(SDB_OBJ(m));
- pthread_rwlock_unlock(&host_lock);
+ pthread_rwlock_unlock(&st->host_lock);
+
return status;
-} /* sdb_store_metric_attr */
+} /* store_metric_attr */
-int
-sdb_store_fetch_timeseries(const char *hostname, const char *metric,
- sdb_timeseries_opts_t *opts, sdb_strbuf_t *buf)
+static int
+store_metric(const char *hostname, const char *name,
+ sdb_metric_store_t *store, sdb_time_t last_update,
+ sdb_object_t *user_data)
{
+ sdb_store_t *st = ST(user_data);
+
+ sdb_store_obj_t *obj = NULL;
+ sdb_host_t *host;
+ sdb_metric_t *metric;
+ sdb_data_t d;
+
sdb_avltree_t *metrics;
- sdb_metric_t *m;
- sdb_timeseries_t *ts;
+ int status = 0;
- if ((! hostname) || (! metric) || (! opts) || (! buf))
+ if ((! hostname) || (! name))
return -1;
- pthread_rwlock_rdlock(&host_lock);
- metrics = get_host_children(hostname, SDB_METRIC);
+ if (store) {
+ if ((store->type != NULL) != (store->id != NULL))
+ return -1;
+ else if (! store->type)
+ store = NULL;
+ }
+
+ pthread_rwlock_wrlock(&st->host_lock);
+ host = lookup_host(st, hostname, /* canonicalize = */ 1);
+ metrics = get_host_children(host, SDB_METRIC);
if (! metrics) {
- sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
- "- host '%s' not found", hostname, metric, hostname);
- pthread_rwlock_unlock(&host_lock);
- return -1;
+ sdb_log(SDB_LOG_ERR, "store: Failed to store metric '%s' - "
+ "host '%s' not found", name, hostname);
+ status = -1;
}
- m = METRIC(sdb_avltree_lookup(metrics, metric));
- if (! m) {
- sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
- "- metric '%s' not found", hostname, metric, metric);
- pthread_rwlock_unlock(&host_lock);
- return -1;
+ if (! status)
+ status = store_obj(STORE_OBJ(host), metrics, SDB_METRIC,
+ name, last_update, &obj);
+ sdb_object_deref(SDB_OBJ(host));
+
+ if (status) {
+ pthread_rwlock_unlock(&st->host_lock);
+ return status;
}
- if ((! m->store.type) || (! m->store.id)) {
- sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
- "- no data-store configured for the stored metric",
- hostname, metric);
- pthread_rwlock_unlock(&host_lock);
+ assert(obj);
+ metric = METRIC(obj);
+
+ if (store)
+ if (store_metric_store(metric, store))
+ status = -1;
+ pthread_rwlock_unlock(&st->host_lock);
+
+ /* record the hostname as an attribute */
+ d.type = SDB_TYPE_STRING;
+ d.data.string = SDB_OBJ(host)->name;
+ if (store_metric_attr(hostname, name, "hostname", &d, last_update, user_data))
+ status = -1;
+ return status;
+} /* store_metric */
+
+static sdb_store_writer_t store_writer = {
+ store_host, store_service, store_metric,
+ store_attribute, store_service_attr, store_metric_attr,
+};
+
+/*
+ * TODO: let prepare and execute accept a store object as their user_data
+ * object
+ */
+
+static sdb_object_t *
+prepare_query(sdb_ast_node_t *ast,
+ sdb_strbuf_t __attribute__((unused)) *errbuf,
+ sdb_object_t __attribute__((unused)) *user_data)
+{
+ return SDB_OBJ(sdb_store_query_prepare(ast));
+} /* prepare_query */
+
+static int
+execute_query(sdb_object_t *q,
+ sdb_strbuf_t *buf, sdb_strbuf_t *errbuf,
+ sdb_object_t __attribute__((unused)) *user_data)
+{
+ return sdb_store_query_execute(QUERY(q), buf, errbuf);
+} /* execute_query */
+
+static sdb_store_reader_t store_reader = {
+ prepare_query, execute_query,
+};
+
+/*
+ * public API
+ */
+
+int
+sdb_store_init(void)
+{
+ if (global_store)
+ return 0;
+
+ global_store = ST(sdb_object_create("store", store_type));
+ if (! global_store) {
+ sdb_log(SDB_LOG_ERR, "store: Failed to allocate store");
return -1;
}
+ if (sdb_plugin_register_writer("memstore",
+ &store_writer, SDB_OBJ(global_store)))
+ return -1;
+ return sdb_plugin_register_reader("memstore",
+ &store_reader, SDB_OBJ(global_store));
+} /* sdb_store_init */
- {
- char type[strlen(m->store.type) + 1];
- char id[strlen(m->store.id) + 1];
+void
+sdb_store_clear(void)
+{
+ if (! global_store)
+ return;
+ sdb_avltree_clear(global_store->hosts);
+} /* sdb_store_clear */
- strncpy(type, m->store.type, sizeof(type));
- strncpy(id, m->store.id, sizeof(id));
- pthread_rwlock_unlock(&host_lock);
+sdb_store_obj_t *
+sdb_store_get_host(const char *name)
+{
+ sdb_host_t *host;
- ts = sdb_plugin_fetch_timeseries(type, id, opts);
- if (! ts) {
- sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
- "- %s fetcher callback returned no data for '%s'",
- hostname, metric, type, id);
- return -1;
- }
- }
+ if ((! global_store) || (! name))
+ return NULL;
- ts_tojson(ts, buf);
- sdb_timeseries_destroy(ts);
- return 0;
-} /* sdb_store_fetch_timeseries */
+ host = lookup_host(global_store, name, /* canonicalize = */ 0);
+ if (! host)
+ return NULL;
+
+ return STORE_OBJ(host);
+} /* sdb_store_get_host */
+
+sdb_store_obj_t *
+sdb_store_get_child(sdb_store_obj_t *host, int type, const char *name)
+{
+ sdb_avltree_t *children;
+
+ if ((! host) || (host->type != SDB_HOST) || (! name))
+ return NULL;
+
+ children = get_host_children(HOST(host), type);
+ if (! children)
+ return NULL;
+ return STORE_OBJ(sdb_avltree_lookup(children, name));
+} /* sdb_store_get_child */
int
sdb_store_get_field(sdb_store_obj_t *obj, int field, sdb_data_t *res)
{
- if ((! obj) || (! res))
+ sdb_data_t tmp;
+
+ if (! obj)
return -1;
switch (field) {
+ case SDB_FIELD_NAME:
+ tmp.type = SDB_TYPE_STRING;
+ tmp.data.string = strdup(SDB_OBJ(obj)->name);
+ if (! tmp.data.string)
+ return -1;
+ break;
case SDB_FIELD_LAST_UPDATE:
- res->type = SDB_TYPE_DATETIME;
- res->data.datetime = obj->last_update;
+ tmp.type = SDB_TYPE_DATETIME;
+ tmp.data.datetime = obj->last_update;
break;
case SDB_FIELD_AGE:
- res->type = SDB_TYPE_DATETIME;
- res->data.datetime = sdb_gettime() - obj->last_update;
+ tmp.type = SDB_TYPE_DATETIME;
+ tmp.data.datetime = sdb_gettime() - obj->last_update;
break;
case SDB_FIELD_INTERVAL:
- res->type = SDB_TYPE_DATETIME;
- res->data.datetime = obj->interval;
+ tmp.type = SDB_TYPE_DATETIME;
+ tmp.data.datetime = obj->interval;
break;
case SDB_FIELD_BACKEND:
- /* TODO: add support for storing array values in a data object
- * for now, fall thru to the error case */
+ if (! res)
+ return 0;
+ tmp.type = SDB_TYPE_ARRAY | SDB_TYPE_STRING;
+ tmp.data.array.length = obj->backends_num;
+ tmp.data.array.values = obj->backends;
+ return sdb_data_copy(res, &tmp);
+ case SDB_FIELD_VALUE:
+ if (obj->type != SDB_ATTRIBUTE)
+ return -1;
+ if (! res)
+ return 0;
+ return sdb_data_copy(res, &ATTR(obj)->value);
+ case SDB_FIELD_TIMESERIES:
+ if (obj->type != SDB_METRIC)
+ return -1;
+ tmp.type = SDB_TYPE_BOOLEAN;
+ tmp.data.boolean = METRIC(obj)->store.type != NULL;
default:
return -1;
}
+ if (res)
+ *res = tmp;
+ else
+ sdb_data_free_datum(&tmp);
return 0;
} /* sdb_store_get_field */
int
-sdb_store_host_tojson(sdb_store_obj_t *h, sdb_strbuf_t *buf,
- sdb_store_matcher_t *filter, int flags)
+sdb_store_get_attr(sdb_store_obj_t *obj, const char *name, sdb_data_t *res,
+ sdb_store_matcher_t *filter)
{
- sdb_host_t *host = HOST(h);
+ sdb_avltree_t *tree = NULL;
+ sdb_store_obj_t *attr;
- if ((! h) || (h->type != SDB_HOST) || (! buf))
+ if ((! obj) || (! name))
return -1;
- sdb_strbuf_append(buf, "{\"name\": \"%s\", ", SDB_OBJ(host)->name);
- store_common_tojson(h, buf);
-
- if (! (flags & SDB_SKIP_ATTRIBUTES)) {
- sdb_strbuf_append(buf, ", \"attributes\": ");
- store_obj_tojson(host->attributes, SDB_ATTRIBUTE, buf, filter, flags);
- }
+ if (obj->type == SDB_HOST)
+ tree = HOST(obj)->attributes;
+ else if (obj->type == SDB_SERVICE)
+ tree = SVC(obj)->attributes;
+ else if (obj->type == SDB_METRIC)
+ tree = METRIC(obj)->attributes;
- if (! (flags & SDB_SKIP_METRICS)) {
- sdb_strbuf_append(buf, ", \"metrics\": ");
- store_obj_tojson(host->metrics, SDB_METRIC, buf, filter, flags);
- }
+ if (! tree)
+ return -1;
- if (! (flags & SDB_SKIP_SERVICES)) {
- sdb_strbuf_append(buf, ", \"services\": ");
- store_obj_tojson(host->services, SDB_SERVICE, buf, filter, flags);
+ attr = STORE_OBJ(sdb_avltree_lookup(tree, name));
+ if (! attr)
+ return -1;
+ if (filter && (! sdb_store_matcher_matches(filter, attr, NULL))) {
+ sdb_object_deref(SDB_OBJ(attr));
+ return -1;
}
- sdb_strbuf_append(buf, "}");
+ assert(STORE_OBJ(attr)->type == SDB_ATTRIBUTE);
+ if (res)
+ sdb_data_copy(res, &ATTR(attr)->value);
+ sdb_object_deref(SDB_OBJ(attr));
return 0;
-} /* sdb_store_host_tojson */
+} /* sdb_store_get_attr */
+
+/* TODO: sdb_store_fetch_timeseries should move into the plugin module */
int
-sdb_store_tojson(sdb_strbuf_t *buf, sdb_store_matcher_t *filter, int flags)
+sdb_store_fetch_timeseries(const char *hostname, const char *metric,
+ sdb_timeseries_opts_t *opts, sdb_strbuf_t *buf)
{
- sdb_avltree_iter_t *host_iter;
- size_t len;
+ sdb_avltree_t *metrics;
+ sdb_host_t *host;
+ sdb_metric_t *m;
- if (! buf)
- return -1;
+ sdb_timeseries_t *ts;
- pthread_rwlock_rdlock(&host_lock);
+ int status = 0;
- host_iter = sdb_avltree_get_iter(hosts);
- if (! host_iter) {
- pthread_rwlock_unlock(&host_lock);
+ if ((! global_store) || (! hostname) || (! metric) || (! opts) || (! buf))
return -1;
- }
- sdb_strbuf_append(buf, "[");
+ pthread_rwlock_rdlock(&global_store->host_lock);
+ host = lookup_host(global_store, hostname, /* canonicalize = */ 1);
+ metrics = get_host_children(host, SDB_METRIC);
+ sdb_object_deref(SDB_OBJ(host));
+ if (! metrics) {
+ sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
+ "- host '%s' not found", hostname, metric, hostname);
+ pthread_rwlock_unlock(&global_store->host_lock);
+ return -1;
+ }
- len = sdb_strbuf_len(buf);
- while (sdb_avltree_iter_has_next(host_iter)) {
- sdb_store_obj_t *host;
+ m = METRIC(sdb_avltree_lookup(metrics, metric));
+ if (! m) {
+ sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
+ "- metric '%s' not found", hostname, metric, metric);
+ pthread_rwlock_unlock(&global_store->host_lock);
+ return -1;
+ }
- host = STORE_OBJ(sdb_avltree_iter_get_next(host_iter));
- assert(host);
+ if ((! m->store.type) || (! m->store.id)) {
+ sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
+ "- no data-store configured for the stored metric",
+ hostname, metric);
+ sdb_object_deref(SDB_OBJ(m));
+ pthread_rwlock_unlock(&global_store->host_lock);
+ return -1;
+ }
- if (filter && (! sdb_store_matcher_matches(filter, host, NULL)))
- continue;
+ {
+ char type[strlen(m->store.type) + 1];
+ char id[strlen(m->store.id) + 1];
- if (sdb_strbuf_len(buf) > len)
- sdb_strbuf_append(buf, ",");
- len = sdb_strbuf_len(buf);
+ strncpy(type, m->store.type, sizeof(type));
+ strncpy(id, m->store.id, sizeof(id));
+ pthread_rwlock_unlock(&global_store->host_lock);
- if (sdb_store_host_tojson(host, buf, filter, flags))
- return -1;
+ ts = sdb_plugin_fetch_timeseries(type, id, opts);
+ if (! ts) {
+ sdb_log(SDB_LOG_ERR, "store: Failed to fetch time-series '%s/%s' "
+ "- %s fetcher callback returned no data for '%s'",
+ hostname, metric, type, id);
+ status = -1;
+ }
}
- sdb_strbuf_append(buf, "]");
-
- sdb_avltree_iter_destroy(host_iter);
- pthread_rwlock_unlock(&host_lock);
- return 0;
-} /* sdb_store_tojson */
+ ts_tojson(ts, buf);
+ sdb_object_deref(SDB_OBJ(m));
+ sdb_timeseries_destroy(ts);
+ return status;
+} /* sdb_store_fetch_timeseries */
-/* TODO: actually support hierarchical data */
int
-sdb_store_iterate(sdb_store_iter_cb cb, void *user_data)
+sdb_store_scan(int type, sdb_store_matcher_t *m, sdb_store_matcher_t *filter,
+ sdb_store_lookup_cb cb, void *user_data)
{
- sdb_avltree_iter_t *host_iter;
+ sdb_avltree_iter_t *host_iter = NULL;
int status = 0;
- pthread_rwlock_rdlock(&host_lock);
+ if ((! global_store) || (! cb))
+ return -1;
- host_iter = sdb_avltree_get_iter(hosts);
+ if ((type != SDB_HOST) && (type != SDB_SERVICE) && (type != SDB_METRIC)) {
+ sdb_log(SDB_LOG_ERR, "store: Cannot scan objects of type %d", type);
+ return -1;
+ }
+
+ pthread_rwlock_rdlock(&global_store->host_lock);
+ host_iter = sdb_avltree_get_iter(global_store->hosts);
if (! host_iter)
status = -1;
/* has_next returns false if the iterator is NULL */
while (sdb_avltree_iter_has_next(host_iter)) {
sdb_store_obj_t *host;
+ sdb_avltree_iter_t *iter = NULL;
host = STORE_OBJ(sdb_avltree_iter_get_next(host_iter));
assert(host);
- if (cb(host, user_data)) {
- status = -1;
- break;
+ if (! sdb_store_matcher_matches(filter, host, NULL))
+ continue;
+
+ if (type == SDB_SERVICE)
+ iter = sdb_avltree_get_iter(HOST(host)->services);
+ else if (type == SDB_METRIC)
+ iter = sdb_avltree_get_iter(HOST(host)->metrics);
+
+ if (iter) {
+ while (sdb_avltree_iter_has_next(iter)) {
+ sdb_store_obj_t *obj;
+ obj = STORE_OBJ(sdb_avltree_iter_get_next(iter));
+ assert(obj);
+
+ if (sdb_store_matcher_matches(m, obj, filter)) {
+ if (cb(obj, filter, user_data)) {
+ sdb_log(SDB_LOG_ERR, "store: Callback returned "
+ "an error while scanning");
+ status = -1;
+ break;
+ }
+ }
+ }
+ }
+ else if (sdb_store_matcher_matches(m, host, filter)) {
+ if (cb(host, filter, user_data)) {
+ sdb_log(SDB_LOG_ERR, "store: Callback returned "
+ "an error while scanning");
+ status = -1;
+ }
}
+
+ sdb_avltree_iter_destroy(iter);
+ if (status)
+ break;
}
sdb_avltree_iter_destroy(host_iter);
- pthread_rwlock_unlock(&host_lock);
+ pthread_rwlock_unlock(&global_store->host_lock);
return status;
-} /* sdb_store_iterate */
+} /* sdb_store_scan */
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */