/// <summary>
/// Add a cluster to the current cluster connections.
/// </summary>
public static MetaCluster AddCluster(ArrayRig <IPEndPoint> entryPoints, string username = null, string password = null)
{
var cluster = new MetaCluster(entryPoints, username, password);
// if the default cluster has not been set assign the new cluster
if (_defaultCluster == null)
{
DefaultCluster = cluster;
}
Clusters.Add(cluster);
return(cluster);
}
/// <summary>
/// Add a cluster to the current cluster connections.
/// </summary>
public static MetaCluster AddCluster(Cassandra.Cluster cluster)
{
var metaCluster = new MetaCluster(cluster);
// if the default cluster has not been set assign the new cluster
if (_defaultCluster == null)
{
DefaultCluster = metaCluster;
}
Clusters.Add(metaCluster);
return(metaCluster);
}
/// <summary>
/// Remove a data cluster from the active collections.
/// </summary>
internal static void RemoveCluster(MetaCluster cluster)
{
// if the cluster being removed is the default cluster
if (cluster == _defaultCluster)
{
if (Clusters.Count == 0)
{
_defaultCluster = null;
}
else
{
DefaultCluster = Clusters[0];
}
}
Clusters.RemoveQuick(cluster);
}
/// <summary>
/// Initialize a Keyspace by name in association with the specified cluster.
/// </summary>
internal Keyspace(string name, MetaCluster metaCluster)
{
if (metaCluster == null)
{
MetaCluster = ManagerCql.DefaultCluster;
}
else
{
MetaCluster = metaCluster;
}
// initialize cache collections
Tables = new Shared <Dictionary <string, Table> >(new Dictionary <string, Table>());
Statements = new Shared <Dictionary <int, PreparedStatement> >(new Dictionary <int, PreparedStatement>());
TableMetadata = new Shared <Dictionary <string, TableMetadata> >(new Dictionary <string, TableMetadata>());
// initialize the batch related fields
_batch = new ArrayRig <Statement>();
_batchLock = new Lock();
// decrease the batch timeout if debugging
#if DEBUG
BatchTimeout = 10000;
#endif
// create the act used to execute batch statements
Act executeBatch = new Act(() => ExecuteBatch());
_batchTimer = new Timer(BatchInterval, executeBatch, false);
_onExecuted = new ArrayRig <IAction>();
// setup the auto update watch
if (_autoUpdateTime > 0)
{
_autoUpdateWatch = new Watch(_autoUpdateTime, true, OnAutoUpdate);
}
try {
// connect to the cluster
_session = MetaCluster.Cluster.Connect();
} catch (Exception ex) {
// log the error
Log.Error("Problem getting Keyspace '" + name + "' metadata from the Cluster.", ex);
return;
}
// initialize a Mapper instance for use by this Keyspace
Mapper = new Mapper(_session);
// get the metadata associated with this Keyspace
Metadata = MetaCluster.Cluster.Metadata.GetKeyspace(name);
// if the Keyspace doesn't exist
if (Metadata == null)
{
// create the Keyspace
if (MetaCluster.DataCenters == null)
{
_session.CreateKeyspace(name,
ReplicationStrategies.CreateSimpleStrategyReplicationProperty(1));
}
else
{
_session.CreateKeyspace(name,
ReplicationStrategies.CreateNetworkTopologyStrategyReplicationProperty(MetaCluster.DataCenters));
}
// get the metadata
Metadata = MetaCluster.Cluster.Metadata.GetKeyspace(name);
}
// add the Keyspace to the DataCluster
MetaCluster.AddKeyspace(this);
// make the target Keyspace of the Session to this Keyspace
_session.ChangeKeyspace(Metadata.Name);
TableMetadata.Take();
foreach (var tableMetadata in Metadata.GetTablesMetadata())
{
TableMetadata.Item.Add(tableMetadata.Name, tableMetadata);
}
TableMetadata.Release();
}
//-------------------------------------------//
/// <summary>
/// Construct a new instance of the load balancer.
/// </summary>
public LoadBalancer(MetaCluster metaCluster)
{
_metaCluster = metaCluster;
}