/// <summary>
/// Returns metadata of specified keyspace.
/// </summary>
/// <param name="keyspace"> the name of the keyspace for which metadata should be
/// returned. </param>
/// <returns>the metadata of the requested keyspace or <c>null</c> if
/// <c>* keyspace</c> is not a known keyspace.</returns>
public KeyspaceMetadata GetKeyspace(string keyspace)
{
if (Configuration.MetadataSyncOptions.MetadataSyncEnabled)
{
//Use local cache
_keyspaces.TryGetValue(keyspace, out var ksInfo);
return(ksInfo);
}
return(TaskHelper.WaitToComplete(SchemaParser.GetKeyspaceAsync(keyspace), _queryAbortTimeout));
}
internal async Task <KeyspaceMetadata> UpdateTokenMapForKeyspace(string name)
{
var keyspaceMetadata = await _schemaParser.GetKeyspaceAsync(name).ConfigureAwait(false);
var dropped = false;
var updated = false;
if (_tokenMap == null)
{
await RebuildTokenMapAsync(false, false).ConfigureAwait(false);
}
if (keyspaceMetadata == null)
{
Metadata.Logger.Verbose("Removing keyspace metadata: " + name);
dropped = _keyspaces.TryRemove(name, out _);
_tokenMap?.RemoveKeyspace(name);
}
else
{
Metadata.Logger.Verbose("Updating keyspace metadata: " + name);
_keyspaces.AddOrUpdate(keyspaceMetadata.Name, keyspaceMetadata, (k, v) =>
{
updated = true;
return(keyspaceMetadata);
});
Metadata.Logger.Info("Rebuilding token map for keyspace {0}", keyspaceMetadata.Name);
if (Partitioner == null)
{
throw new DriverInternalError("Partitioner can not be null");
}
_tokenMap.UpdateKeyspace(keyspaceMetadata);
}
if (Configuration.MetadataSyncOptions.MetadataSyncEnabled)
{
if (dropped)
{
FireSchemaChangedEvent(SchemaChangedEventArgs.Kind.Dropped, name, null, this);
}
else if (updated)
{
FireSchemaChangedEvent(SchemaChangedEventArgs.Kind.Updated, name, null, this);
}
else
{
FireSchemaChangedEvent(SchemaChangedEventArgs.Kind.Created, name, null, this);
}
}
return(keyspaceMetadata);
}