X-Git-Url: https://git.tokkee.org/?p=sysdb.git;a=blobdiff_plain;f=src%2Fcore%2Fstore.c;h=7671e9800f13a0ac0a81e2b24817d95b0f0a83ef;hp=5a00b6c3cd49a7bba31cb8755bf4bda73f9564f8;hb=742c60b383c9373b2156c3af5ff9e7605c056e60;hpb=6fbccd38ba921b0f08b4a38ef3568bd9ca12fcd5 diff --git a/src/core/store.c b/src/core/store.c index 5a00b6c..7671e98 100644 --- a/src/core/store.c +++ b/src/core/store.c @@ -43,22 +43,62 @@ #include #include +#include #include /* * 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_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) @@ -87,12 +127,14 @@ store_obj_destroy(sdb_object_t *obj) 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; @@ -105,14 +147,17 @@ sdb_host_init(sdb_object_t *obj, va_list ap) sobj->services = sdb_avltree_create(); if (! sobj->services) return -1; + sobj->metrics = sdb_avltree_create(); + if (! sobj->metrics) + return -1; sobj->attributes = sdb_avltree_create(); 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); @@ -121,12 +166,14 @@ sdb_host_destroy(sdb_object_t *obj) if (sobj->services) sdb_avltree_destroy(sobj->services); + if (sobj->metrics) + 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; @@ -140,10 +187,10 @@ sdb_service_init(sdb_object_t *obj, va_list ap) 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); @@ -152,10 +199,46 @@ sdb_service_destroy(sdb_object_t *obj) if (sobj->attributes) sdb_avltree_destroy(sobj->attributes); -} /* sdb_service_destroy */ +} /* service_destroy */ + +static int +metric_init(sdb_object_t *obj, va_list ap) +{ + sdb_metric_t *sobj = METRIC(obj); + int ret; + + /* this will consume the first argument (type) of ap */ + ret = store_obj_init(obj, ap); + if (ret) + return ret; + + sobj->attributes = sdb_avltree_create(); + if (! sobj->attributes) + return -1; + + sobj->store.type = sobj->store.id = NULL; + return 0; +} /* metric_init */ + +static void +metric_destroy(sdb_object_t *obj) +{ + sdb_metric_t *sobj = METRIC(obj); + assert(obj); + + store_obj_destroy(obj); + + if (sobj->attributes) + sdb_avltree_destroy(sobj->attributes); + + if (sobj->store.type) + free(sobj->store.type); + if (sobj->store.id) + free(sobj->store.id); +} /* 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; @@ -171,33 +254,45 @@ sdb_attr_init(sdb_object_t *obj, va_list ap) 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 sdb_host_type = { - sizeof(sdb_host_t), - sdb_host_init, - sdb_host_destroy +static sdb_type_t store_type = { + /* size = */ sizeof(sdb_store_t), + /* init = */ store_init, + /* destroy = */ store_destroy, }; -static sdb_type_t sdb_service_type = { - sizeof(sdb_service_t), - sdb_service_init, - sdb_service_destroy +static sdb_type_t host_type = { + /* size = */ sizeof(sdb_host_t), + /* init = */ host_init, + /* destroy = */ host_destroy }; -static sdb_type_t sdb_attribute_type = { - sizeof(sdb_attribute_t), - sdb_attr_init, - sdb_attr_destroy +static sdb_type_t service_type = { + /* size = */ sizeof(sdb_service_t), + /* init = */ service_init, + /* destroy = */ service_destroy +}; + +static sdb_type_t metric_type = { + /* size = */ sizeof(sdb_metric_t), + /* init = */ metric_init, + /* destroy = */ metric_destroy +}; + +static sdb_type_t attribute_type = { + /* size = */ sizeof(sdb_attribute_t), + /* init = */ attr_init, + /* destroy = */ attr_destroy }; /* @@ -205,9 +300,25 @@ static sdb_type_t sdb_attribute_type = { */ 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 @@ -240,8 +351,9 @@ record_backend(sdb_store_obj_t *obj) } /* 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; @@ -285,12 +397,16 @@ store_obj(sdb_avltree_t *parent_tree, int type, const char *name, 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 : sdb_service_type; + t = type == SDB_HOST + ? host_type + : type == SDB_SERVICE + ? service_type + : metric_type; new = STORE_OBJ(sdb_object_create(name, t, type, last_update)); } @@ -313,6 +429,14 @@ store_obj(sdb_avltree_t *parent_tree, int type, const char *name, 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; @@ -322,13 +446,14 @@ store_obj(sdb_avltree_t *parent_tree, int type, const char *name, } /* 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; @@ -342,145 +467,153 @@ 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_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->metrics; else return host->services; } /* get_host_children */ /* - * store_common_tojson serializes common object attributes to JSON. + * ts_tojson serializes a time-series 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) +ts_tojson(sdb_timeseries_t *ts, sdb_strbuf_t *buf) { - char time_str[64]; - char interval_str[64]; - size_t i; + char start_str[64]; + char end_str[64]; - if (! sdb_strftime(time_str, sizeof(time_str), - "%F %T %z", obj->last_update)) - snprintf(time_str, sizeof(time_str), ""); - time_str[sizeof(time_str) - 1] = '\0'; - - if (! sdb_strfinterval(interval_str, sizeof(interval_str), - obj->interval)) - snprintf(interval_str, sizeof(interval_str), ""); - interval_str[sizeof(interval_str) - 1] = '\0'; + size_t i; - sdb_strbuf_append(buf, "\"last_update\": \"%s\", " - "\"update_interval\": \"%s\", \"backends\": [", - time_str, interval_str); + /* TODO: make time format configurable */ + if (! sdb_strftime(start_str, sizeof(start_str), ts->start)) + snprintf(start_str, sizeof(start_str), ""); + start_str[sizeof(start_str) - 1] = '\0'; + if (! sdb_strftime(end_str, sizeof(end_str), ts->end)) + snprintf(end_str, sizeof(end_str), ""); + end_str[sizeof(end_str) - 1] = '\0'; + + sdb_strbuf_append(buf, "{\"start\": \"%s\", \"end\": \"%s\", \"data\": {", + start_str, end_str); + + for (i = 0; i < ts->data_names_len; ++i) { + size_t j; + sdb_strbuf_append(buf, "\"%s\": [", ts->data_names[i]); + + for (j = 0; j < ts->data_len; ++j) { + char time_str[64]; + + if (! sdb_strftime(time_str, sizeof(time_str), ts->data[i][j].timestamp)) + snprintf(time_str, sizeof(time_str), ""); + time_str[sizeof(time_str) - 1] = '\0'; + + /* 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, ","); + } - 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, ","); + if (i < ts->data_names_len - 1) + sdb_strbuf_append(buf, "],"); + else + sdb_strbuf_append(buf, "]"); } - sdb_strbuf_append(buf, "]"); -} /* store_common_tojson */ + sdb_strbuf_append(buf, "}}"); +} /* ts_tojson */ /* - * store_obj_tojson serializes attribute / service objects to JSON. - * - * The function never returns an error. Rather, an error message will be part - * of the serialized data. + * store writer API */ -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_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; +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_store_t *st = ST(user_data); - 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); + sdb_host_t *host; + sdb_avltree_t *attrs; + int status = 0; - 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); - } - sdb_strbuf_append(buf, "}"); + if ((! hostname) || (! key)) + return -1; - if (sdb_avltree_iter_has_next(iter)) - sdb_strbuf_append(buf, ","); + 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); + status = -1; } - sdb_avltree_iter_destroy(iter); - sdb_strbuf_append(buf, "]"); -} /* store_obj_tojson */ + if (! status) + status = store_attr(STORE_OBJ(host), attrs, key, value, last_update); -/* - * public API - */ + sdb_object_deref(SDB_OBJ(host)); + pthread_rwlock_unlock(&st->host_lock); -void -sdb_store_clear(void) -{ - sdb_avltree_destroy(hosts); - hosts = NULL; -} /* sdb_store_clear */ + return status; +} /* store_attribute */ -int -sdb_store_host(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_store_t *st = ST(user_data); + char *cname = NULL; int status = 0; @@ -493,85 +626,77 @@ sdb_store_host(const char *name, sdb_time_t last_update) 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); + 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_host */ +} /* store_host */ -_Bool -sdb_store_has_host(const char *name) +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_host_t *host; - - if (! name) - return NULL; + sdb_store_t *st = ST(user_data); - host = lookup_host(name); - return host != NULL; -} /* sdb_store_has_host */ - -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; + sdb_service_t *svc; + sdb_avltree_t *services; int status = 0; - if ((! hostname) || (! key)) + if ((! hostname) || (! service) || (! key)) return -1; - pthread_rwlock_wrlock(&host_lock); - attrs = get_host_children(hostname, SDB_ATTRIBUTE); - if (! attrs) { + 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(&st->host_lock); + return -1; + } + + svc = SVC(sdb_avltree_lookup(services, service)); + if (! svc) { sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' - " - "host '%s' not found", key, hostname); + "service '%s/%s' not found", key, hostname, service); status = -1; } if (! status) - status = store_attr(attrs, 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(&st->host_lock); - pthread_rwlock_unlock(&host_lock); return status; -} /* sdb_store_attribute */ +} /* store_service_attr */ -int -sdb_store_service(const char *hostname, const char *name, - 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_t *st = ST(user_data); + + sdb_host_t *host; sdb_avltree_t *services; + sdb_data_t d; int status = 0; if ((! hostname) || (! name)) 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); if (! services) { sdb_log(SDB_LOG_ERR, "store: Failed to store service '%s' - " "host '%s' not found", name, hostname); @@ -579,175 +704,444 @@ sdb_store_service(const char *hostname, const char *name, } if (! status) - status = store_obj(services, SDB_SERVICE, name, last_update, NULL); - pthread_rwlock_unlock(&host_lock); + status = store_obj(STORE_OBJ(host), services, SDB_SERVICE, + name, last_update, NULL); + + sdb_object_deref(SDB_OBJ(host)); + pthread_rwlock_unlock(&st->host_lock); + + if (status) + return status; + + /* 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; return status; -} /* sdb_store_service */ +} /* store_service */ -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_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_avltree_t *services; - sdb_service_t *svc; + sdb_store_t *st = ST(user_data); + + sdb_avltree_t *metrics; + sdb_host_t *host; + sdb_metric_t *m; int status = 0; - if ((! hostname) || (! service) || (! key)) + if ((! hostname) || (! metric) || (! key)) return -1; - pthread_rwlock_wrlock(&host_lock); - services = get_host_children(hostname, SDB_SERVICE); - if (! services) { + 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 service '%s' - host '%ss' not found", - key, service, hostname); - pthread_rwlock_unlock(&host_lock); + "for metric '%s' - host '%s' not found", + key, metric, hostname); + pthread_rwlock_unlock(&st->host_lock); return -1; } - svc = SVC(sdb_avltree_lookup(services, service)); - if (! svc) { + m = METRIC(sdb_avltree_lookup(metrics, metric)); + if (! m) { sdb_log(SDB_LOG_ERR, "store: Failed to store attribute '%s' - " - "service '%s/%s' not found", key, hostname, service); + "metric '%s/%s' not found", key, hostname, metric); status = -1; } if (! status) - status = store_attr(svc->attributes, key, value, last_update); + status = store_attr(STORE_OBJ(m), m->attributes, + key, value, last_update); - sdb_object_deref(SDB_OBJ(svc)); - pthread_rwlock_unlock(&host_lock); + sdb_object_deref(SDB_OBJ(m)); + pthread_rwlock_unlock(&st->host_lock); + + return status; +} /* store_metric_attr */ + +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; + + int status = 0; + + if ((! hostname) || (! name)) + return -1; + + 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 store metric '%s' - " + "host '%s' not found", name, hostname); + status = -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; + } + + 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; -} /* sdb_store_service_attr */ +} /* 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 */ + +void +sdb_store_clear(void) +{ + if (! global_store) + return; + sdb_avltree_clear(global_store->hosts); +} /* sdb_store_clear */ + +sdb_store_obj_t * +sdb_store_get_host(const char *name) +{ + sdb_host_t *host; + + if ((! global_store) || (! name)) + return NULL; + + 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 (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_ATTRIBUTES)) { - sdb_strbuf_append(buf, ", \"attributes\": "); - store_obj_tojson(host->attributes, SDB_ATTRIBUTE, 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; + + int status = 0; - pthread_rwlock_rdlock(&host_lock); + if ((! global_store) || (! hostname) || (! metric) || (! opts) || (! buf)) + return -1; - host_iter = sdb_avltree_get_iter(hosts); - if (! host_iter) { - pthread_rwlock_unlock(&host_lock); + 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; } - sdb_strbuf_append(buf, "{\"hosts\":["); - - 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; + + 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; + } - host_iter = sdb_avltree_get_iter(hosts); + 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 : */