raj14243 commented on code in PR #1926:
URL:
https://github.com/apache/cassandra-gocql-driver/pull/1926#discussion_r2835386775
##########
metadata.go:
##########
@@ -243,51 +245,66 @@ const (
// queries the cluster for schema information for a specific keyspace
type schemaDescriber struct {
- session *Session
- mu sync.Mutex
+ session *Session
+ mu sync.Mutex
+ schemaRefresher *refreshDebouncer
+ schemaMeta atomic.Value // *schemaMeta
+}
- cache map[string]*KeyspaceMetadata
+type schemaMeta struct {
+ keyspaceMeta map[string]*KeyspaceMetadata
}
// creates a session bound schema describer which will query and cache
// keyspace metadata
func newSchemaDescriber(session *Session) *schemaDescriber {
- return &schemaDescriber{
+ meta := new(schemaMeta)
+ describer := &schemaDescriber{
session: session,
- cache: map[string]*KeyspaceMetadata{},
}
+ describer.schemaMeta.Store(meta)
+ return describer
+}
+
+func (s *schemaDescriber) getSchemaMetaForRead() *schemaMeta {
+ meta, _ := s.schemaMeta.Load().(*schemaMeta)
+ return meta
+}
+
+func (s *schemaDescriber) getSchemaMetaForUpdate() *schemaMeta {
+ meta := s.getSchemaMetaForRead()
+ metaNew := new(schemaMeta)
+ if meta != nil {
+ *metaNew = *meta
+ }
+ return metaNew
}
// returns the cached KeyspaceMetadata held by the describer for the named
// keyspace.
func (s *schemaDescriber) getSchema(keyspaceName string) (*KeyspaceMetadata,
error) {
- s.mu.Lock()
- defer s.mu.Unlock()
-
- metadata, found := s.cache[keyspaceName]
+ metadata, found := s.getSchemaMetaForRead().keyspaceMeta[keyspaceName]
if !found {
- // refresh the cache for this keyspace
- err := s.refreshSchema(keyspaceName)
+ // refresh the cache
+ err := s.refreshSchemaMetadata()
Review Comment:
Is this to handle reconnects ?
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
