worryg0d commented on code in PR #1929:
URL:
https://github.com/apache/cassandra-gocql-driver/pull/1929#discussion_r2932266942
##########
cluster.go:
##########
@@ -394,6 +405,55 @@ func (cfg *ClusterConfig) filterHost(host *HostInfo) bool {
return !(cfg.HostFilter == nil || cfg.HostFilter.Accept(host))
}
+// MetadataConfig configures driver's internal metadata caching and event
listening.
+type MetadataConfig struct {
+ // CacheMode controls how the driver reads and caches schema metadata
from Cassandra system tables.
+ //
+ // Also, it affects the behavior of schema change listeners.
+ //
+ // If CacheMode is [KeyspaceOnly], only [KeyspaceChangeListener] will
be notified,
+ // having other listeners registered will result in an error during
session creation.
+ //
+ // If CacheMode is [Disabled], having these listeners will result in an
error during session creation.
+ //
+ // See [MetadataCacheMode] for more details.
+ CacheMode MetadataCacheMode
+
+ // HostListener will be notified when host state and topology changes
occur.
+ //
+ // Consider using [HostListenersMux] if you need to register multiple
listeners for the same type of host state and topology change.
+ HostListener HostListenersConfig
+
+ // SchemaListener will be notified when schema changes occur.
+ //
+ // Consider using [SchemaListenersMux] if you need to register multiple
listeners for the same type of schema change.
+ SchemaListener SchemaListenersConfig
+
+ // ReadyListener will be notified when the session is ready to be used.
+ // This is meant to be implemented by Host and Schema listeners but it
can also be used as
+ // a generic callback for when the session is ready regardless of
whether a metadata listener is implemented or not.
+ //
+ // Consider using [SessionReadyListenersMux] if you need to register
multiple listeners for the same session ready event.
+ ReadyListener SessionReadyListener
+}
Review Comment:
Added a simple integration test `TestSessionReadyEvent` - had to spend some
time figuring out why listener was called twice
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