protected override void PreStart()
{
base.PreStart();
// Get a session to talk to Cassandra with
CassandraSnapshotStoreSettings settings = _cassandraExtension.SnapshotStoreSettings;
_session = _cassandraExtension.SessionManager.ResolveSession(settings.SessionKey);
// Create the keyspace if necessary and always attempt to create the table
if (settings.KeyspaceAutocreate)
{
_session.Execute(string.Format(SnapshotStoreStatements.CreateKeyspace, settings.Keyspace, settings.KeyspaceCreationOptions));
}
var fullyQualifiedTableName = string.Format("{0}.{1}", settings.Keyspace, settings.Table);
var createTable = string.IsNullOrWhiteSpace(settings.TableCreationProperties)
? string.Format(SnapshotStoreStatements.CreateTable, fullyQualifiedTableName, string.Empty, string.Empty)
: string.Format(SnapshotStoreStatements.CreateTable, fullyQualifiedTableName, " AND ",
settings.TableCreationProperties);
_session.Execute(createTable);
// Prepare some statements
_writeSnapshot = _session.PrepareFormat(SnapshotStoreStatements.WriteSnapshot, fullyQualifiedTableName);
_deleteSnapshot = _session.PrepareFormat(SnapshotStoreStatements.DeleteSnapshot, fullyQualifiedTableName);
_selectSnapshot = _session.PrepareFormat(SnapshotStoreStatements.SelectSnapshot, fullyQualifiedTableName);
_selectSnapshotMetadata = _session.PrepareFormat(SnapshotStoreStatements.SelectSnapshotMetadata, fullyQualifiedTableName);
}
public CassandraExtension(ExtendedActorSystem system)
{
if (system == null) throw new ArgumentNullException("system");
// Initialize fallback configuration defaults
system.Settings.InjectTopLevelFallback(CassandraPersistence.DefaultConfig());
// Get or add the session manager
SessionManager = CassandraSession.Instance.Apply(system);
// Read config
var journalConfig = system.Settings.Config.GetConfig("cassandra-journal");
JournalSettings = new CassandraJournalSettings(journalConfig);
var snapshotConfig = system.Settings.Config.GetConfig("cassandra-snapshot-store");
SnapshotStoreSettings = new CassandraSnapshotStoreSettings(snapshotConfig);
}