worryg0d commented on code in PR #1929:
URL:
https://github.com/apache/cassandra-gocql-driver/pull/1929#discussion_r2925820673
##########
metadata.go:
##########
@@ -2049,3 +2101,319 @@ func isIdentifierChar(c byte) bool {
c == '_' ||
c == '&'
}
+
+// Handles the full schema changes including table, user type, function,
aggregate.
+func handleFullSchemaChanges(session *Session, oldKeyspaces, newKeyspaces
map[string]*KeyspaceMetadata) {
+ for _, oldKsMeta := range oldKeyspaces {
+ newKsMeta, ok := newKeyspaces[oldKsMeta.Name]
+ if !ok {
+ // Skip, KeyspaceChangeListener is already notified in
refreshSchemas()
+ continue
+ }
+
+ if session.schemaChangeListeners.TableChangeListener != nil {
+ handleSchemaTableChanges(session, oldKsMeta, newKsMeta)
+ }
+ if session.schemaChangeListeners.UserTypeChangeListener != nil {
+ handleSchemaUserTypeChanges(session, oldKsMeta,
newKsMeta)
+ }
+ if session.schemaChangeListeners.FunctionChangeListener != nil {
+ handleSchemaFunctionChanges(session, oldKsMeta,
newKsMeta)
+ }
+ if session.schemaChangeListeners.AggregateChangeListener != nil
{
+ handleSchemaAggregateChanges(session, oldKsMeta,
newKsMeta)
+ }
+ }
+}
+
+// Computes the schema table changes and notifies the event listener if it is
set.
+// It is expected that the TableChangeListener is set on the Session.
+func handleSchemaTableChanges(session *Session, oldKeyspace, newKeyspace
*KeyspaceMetadata) {
+ var createdEvents []OnTableCreatedEvent
+ var droppedEvents []OnTableDroppedEvent
+ var updatedEvents []OnTableUpdatedEvent
+
+ for _, oldTableMeta := range oldKeyspace.Tables {
+ newTableMeta, ok := newKeyspace.Tables[oldTableMeta.Name]
+ if !ok {
+ droppedEvents = append(droppedEvents,
OnTableDroppedEvent{Table: oldTableMeta})
+ } else {
+ if !compareTablesMetadata(oldTableMeta, newTableMeta) {
+ updatedEvents = append(updatedEvents,
OnTableUpdatedEvent{Old: oldTableMeta, New: newTableMeta})
+ }
+ }
+ }
+
+ for _, newTableMeta := range newKeyspace.Tables {
+ _, ok := oldKeyspace.Tables[newTableMeta.Name]
+ if !ok {
+ createdEvents = append(createdEvents,
OnTableCreatedEvent{Table: newTableMeta})
+ }
+ }
+
+ session.logger.Debug("Computed schema table change events",
+ NewLogFieldInt("created_table_events_count",
len(createdEvents)),
+ NewLogFieldInt("updated_table_events_count",
len(updatedEvents)),
+ NewLogFieldInt("dropped_table_events_count",
len(droppedEvents)),
Review Comment:
Added logs for keyspace events
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