// deleteOldPlaceholderCharmsOps returns the txn ops required to delete all placeholder charm
// records older than the specified charm URL.
func deleteOldPlaceholderCharmsOps(st *State, charms mongo.Collection, curl *charm.URL) ([]txn.Op, error) {
// Get a regex with the charm URL and no revision.
noRevURL := curl.WithRevision(-1)
curlRegex := "^" + regexp.QuoteMeta(st.docID(noRevURL.String()))
var docs []charmDoc
query := bson.D{{"_id", bson.D{{"$regex", curlRegex}}}, {"placeholder", true}}
err := charms.Find(query).Select(bson.D{{"_id", 1}, {"url", 1}}).All(&docs)
if err != nil {
return nil, errors.Trace(err)
}
var ops []txn.Op
for _, doc := range docs {
if doc.URL.Revision >= curl.Revision {
continue
}
ops = append(ops, txn.Op{
C: charmsC,
Id: doc.DocID,
Assert: stillPlaceholder,
Remove: true,
})
}
return ops, nil
}
// getEntitiesWithStatuses returns the ids for all entities that
// have history entries
func getEntitiesWithStatuses(coll mongo.Collection) ([]string, error) {
var globalKeys []string
err := coll.Find(nil).Distinct("globalkey", &globalKeys)
if err != nil {
return nil, errors.Trace(err)
}
return globalKeys, nil
}
// getEntitiesWithStatuses returns the ids for all entities that
// have history entries
func getEntitiesWithStatuses(coll mongo.Collection) ([]string, error) {
var entityKeys []string
err := coll.Find(nil).Distinct("entityid", &entityKeys)
if err != nil {
return nil, errors.Trace(err)
}
return entityKeys, nil
}
// getOldestTimeToKeep returns the create time for the oldest
// status log to be kept.
func getOldestTimeToKeep(coll mongo.Collection, globalKey string, size int) (int64, bool, error) {
result := historicalStatusDoc{}
err := coll.Find(bson.D{{"globalkey", globalKey}}).Sort("-updated").Skip(size - 1).One(&result)
if err == mgo.ErrNotFound {
return -1, false, nil
}
if err != nil {
return -1, false, errors.Trace(err)
}
return result.Updated, true, nil
}
// readEntries reads all lease data for the client's namespace.
func (client *client) readEntries(collection mongo.Collection) (map[string]entry, error) {
// Read all lease documents in the client's namespace.
query := bson.M{
fieldType: typeLease,
fieldNamespace: client.config.Namespace,
}
iter := collection.Find(query).Iter()
// Extract valid entries for each one.
entries := make(map[string]entry)
var leaseDoc leaseDoc
for iter.Next(&leaseDoc) {
name, entry, err := leaseDoc.entry()
if err != nil {
return nil, errors.Annotatef(err, "corrupt lease document %q", leaseDoc.Id)
}
entries[name] = entry
}
if err := iter.Close(); err != nil {
return nil, errors.Trace(err)
}
return entries, nil
}
func isNotDeadWithSession(coll mongo.Collection, id interface{}) (bool, error) {
n, err := coll.Find(bson.D{{"_id", id}, {"life", bson.D{{"$ne", Dead}}}}).Count()
return n == 1, err
}
func isAliveWithSession(coll mongo.Collection, id interface{}) (bool, error) {
n, err := coll.Find(bson.D{{"_id", id}, {"life", Alive}}).Count()
return n == 1, err
}