joao-r-reis commented on code in PR #1929:
URL:
https://github.com/apache/cassandra-gocql-driver/pull/1929#discussion_r2927577103
##########
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 {
Review Comment:
Example:
```
sessionInitialized := session.initialized()
notifier, supportsRefresh := session.policy.(schemaRefreshNotifier)
hasKeyspaceListener := session.schemaListeners.hasKeyspace() &&
sessionInitialized
if supportsRefresh {
notifier.schemaRefreshed(sd.getSchemaMetaForRead())
}
session.logger.Debug("Computed schema keyspace change events",
NewLogFieldInt("created_keyspaces_count", len(newKeyspaces)),
NewLogFieldInt("updated_keyspaces_count", len(updatedKeyspaces)),
NewLogFieldInt("dropped_keyspaces_count", len(droppedKeyspaces)),
)
if supportsRefresh && !hasKeyspaceListener {
return
}
notifyPolicy := func(keyspace string, change SchemaChangeType) {
if !supportsRefresh {
session.policy.KeyspaceChanged(KeyspaceUpdateEvent{Keyspace:
keyspace, Change: change})
}
}
for _, name := range newKeyspaces {
notifyPolicy(name, SchemaChangeTypeCreated)
if hasKeyspaceListener {
session.schemaListeners.OnKeyspaceCreated(OnKeyspaceCreatedEvent{Keyspace:
keyspaceMeta[name]})
}
}
for _, name := range droppedKeyspaces {
notifyPolicy(name, SchemaChangeTypeDropped)
if hasKeyspaceListener {
session.schemaListeners.OnKeyspaceDropped(OnKeyspaceDroppedEvent{Keyspace:
oldKeyspaceMeta[name]})
}
}
for _, name := range updatedKeyspaces {
notifyPolicy(name, SchemaChangeTypeUpdated)
if hasKeyspaceListener {
session.schemaListeners.OnKeyspaceUpdated(OnKeyspaceUpdatedEvent{
Old: oldKeyspaceMeta[name],
New: keyspaceMeta[name],
})
}
}
```
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