private void OnConnectionCassandraEvent(object sender, CassandraEventArgs e)
{
//This event is invoked from a worker thread (not a IO thread)
if (e is TopologyChangeEventArgs)
{
var tce = (TopologyChangeEventArgs)e;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode || tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
Refresh();
return;
}
}
if (e is StatusChangeEventArgs)
{
var sce = (StatusChangeEventArgs)e;
//The address in the Cassandra event message needs to be translated
var address = TranslateAddress(sce.Address);
_logger.Info("Received Node status change event: host {0} is {1}", address, sce.What.ToString().ToUpper());
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
Metadata.BringUpHost(address, this);
return;
}
if (sce.What == StatusChangeEventArgs.Reason.Down)
{
Metadata.SetDownHost(address, this);
return;
}
}
if (e is SchemaChangeEventArgs)
{
var ssc = (SchemaChangeEventArgs)e;
if (!String.IsNullOrEmpty(ssc.Table))
{
Metadata.RefreshTable(ssc.Keyspace, ssc.Table);
return;
}
if (ssc.FunctionName != null)
{
Metadata.ClearFunction(ssc.Keyspace, ssc.FunctionName, ssc.Signature);
return;
}
if (ssc.AggregateName != null)
{
Metadata.ClearAggregate(ssc.Keyspace, ssc.AggregateName, ssc.Signature);
return;
}
if (ssc.Type != null)
{
return;
}
if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
Metadata.RemoveKeyspace(ssc.Keyspace);
return;
}
Metadata.RefreshSingleKeyspace(ssc.What == SchemaChangeEventArgs.Reason.Created, ssc.Keyspace);
}
}
private void OnConnectionCassandraEvent(object sender, CassandraEventArgs e)
{
Task.Factory.StartNew(() =>
{
if (e is TopologyChangeEventArgs)
{
var tce = (TopologyChangeEventArgs)e;
if (tce.What == TopologyChangeEventArgs.Reason.NewNode)
{
Refresh(false);
return;
}
if (tce.What == TopologyChangeEventArgs.Reason.RemovedNode)
{
Refresh(false);
return;
}
}
if (e is StatusChangeEventArgs)
{
var sce = (StatusChangeEventArgs)e;
//The address in the Cassandra event message needs to be translated
var address = TranslateAddress(sce.Address);
if (sce.What == StatusChangeEventArgs.Reason.Up)
{
Metadata.BringUpHost(address, this);
return;
}
if (sce.What == StatusChangeEventArgs.Reason.Down)
{
Metadata.SetDownHost(address, this);
return;
}
}
if (e is SchemaChangeEventArgs)
{
var ssc = (SchemaChangeEventArgs)e;
if (!String.IsNullOrEmpty(ssc.Table))
{
Metadata.RefreshTable(ssc.Keyspace, ssc.Table);
return;
}
if (ssc.What == SchemaChangeEventArgs.Reason.Dropped)
{
Metadata.RemoveKeyspace(ssc.Keyspace);
return;
}
Metadata.RefreshSingleKeyspace(ssc.What == SchemaChangeEventArgs.Reason.Created, ssc.Keyspace);
}
}, CancellationToken.None, TaskCreationOptions.None, TaskScheduler.Default);
}