store: Simplified object lookup during update.

Again, based on having hosts on the toplevel only. This greatly simplifies the
overall structure. After all, this is the underlying storage layer only. More
complex relationships between objects will be handled on a different layer.

src/core/store.c

@@ -163,46 +163,10 @@ static sdb_type_t sdb_attribute_type = {
  */
 
 static sdb_store_obj_t *
-store_lookup_in_list(sdb_llist_t *l, int type, const char *name)
+lookup_host(const char *name)
 {
-	sdb_llist_iter_t *iter;
-
-	if (! l)
-		return NULL;
-
-	iter = sdb_llist_get_iter(l);
-	if (! iter)
-		return NULL;
-
-	while (sdb_llist_iter_has_next(iter)) {
-		sdb_store_obj_t *sobj = SDB_STORE_OBJ(sdb_llist_iter_get_next(iter));
-		assert(sobj);
-
-		if ((STORE_BASE(sobj)->type == type)
-				&& (! strcasecmp(SDB_OBJ(sobj)->name, name))) {
-			sdb_llist_iter_destroy(iter);
-			return sobj;
-		}
-
-		/* don't lookups non-host types from hierarchical hosts */
-		if ((type != SDB_HOST) && (STORE_BASE(sobj)->type == SDB_HOST))
-			continue;
-
-		sobj = store_lookup_in_list(sobj->services, type, name);
-		if (sobj) {
-			sdb_llist_iter_destroy(iter);
-			return sobj;
-		}
-	}
-	sdb_llist_iter_destroy(iter);
-	return NULL;
-} /* store_lookup_in_list */
-
-static sdb_store_obj_t *
-store_lookup(int type, const char *name)
-{
-	return store_lookup_in_list(host_list, type, name);
-} /* store_lookup */
+	return SDB_STORE_OBJ(sdb_llist_search_by_name(host_list, name));
+} /* lookup_host */
 
 /* The obj_lock has to be acquired before calling this function. */
 static int
@@ -223,6 +187,11 @@ store_obj(const char *hostname, int type, const char *name,
 			|| (type == SDB_SERVICE)
 			|| (type == SDB_ATTRIBUTE));
 
+	assert(hostname || (type == SDB_HOST));
+	assert((! hostname)
+			|| (type == SDB_SERVICE)
+			|| (type == SDB_ATTRIBUTE));
+
 	if (! host_list)
 		if (! (host_list = sdb_llist_create()))
 			return -1;
@@ -238,7 +207,7 @@ store_obj(const char *hostname, int type, const char *name,
 	}
 
 	if (hostname) {
-		sdb_store_obj_t *parent;
+		sdb_store_obj_t *host;
 
 		host_cname = sdb_plugin_cname(strdup(hostname));
 		if (! host_cname) {
@@ -248,8 +217,8 @@ store_obj(const char *hostname, int type, const char *name,
 		}
 		hostname = host_cname;
 
-		parent = store_lookup(SDB_HOST, hostname);
-		if (! parent) {
+		host = lookup_host(hostname);
+		if (! host) {
 			sdb_log(SDB_LOG_ERR, "store: Failed to store %s '%s' - "
 					"host '%s' not found", SDB_STORE_TYPE_TO_NAME(type),
 					name, hostname);
@@ -259,21 +228,15 @@ store_obj(const char *hostname, int type, const char *name,
 		}
 
 		if (type == SDB_ATTRIBUTE)
-			parent_list = parent->attributes;
+			parent_list = host->attributes;
 		else
-			parent_list = parent->services;
+			parent_list = host->services;
 	}
 
 	if (type == SDB_HOST)
-		/* make sure that each host is unique */
-		old = STORE_BASE(store_lookup_in_list(host_list, type, name));
-	else if (type == SDB_ATTRIBUTE)
-		/* look into attributes of this host */
-		old = STORE_BASE(sdb_llist_search_by_name(parent_list, name));
+		old = STORE_BASE(sdb_llist_search_by_name(host_list, name));
 	else
-		/* look into services assigned to this host (store_lookup_in_list
-		 * does not look up services from hierarchical hosts) */
-		old = STORE_BASE(store_lookup_in_list(parent_list, type, name));
+		old = STORE_BASE(sdb_llist_search_by_name(parent_list, name));
 
 	if (old) {
 		if (old->last_update > last_update) {
@@ -433,7 +396,7 @@ sdb_store_has_host(const char *name)
 	if (! name)
 		return NULL;
 
-	host = store_lookup(SDB_HOST, name);
+	host = lookup_host(name);
 	return host != NULL;
 } /* sdb_store_has_host */
 
@@ -445,7 +408,7 @@ sdb_store_get_host(const char *name)
 	if (! name)
 		return NULL;
 
-	host = store_lookup(SDB_HOST, name);
+	host = lookup_host(name);
 	if (! host)
 		return NULL;