ICassandraReplicationStrategy GetReplicationStrategy(IConfiguration configuration)
{
var replStratefyCfg = configuration["cronus_projections_cassandra_replication_strategy"];
var replFactorCfg = configuration["cronus_projections_cassandra_replication_factor"];
ICassandraReplicationStrategy replicationStrategy = null;
if (string.IsNullOrEmpty(replStratefyCfg))
{
replicationStrategy = new SimpleReplicationStrategy(1);
}
else if (replStratefyCfg.Equals("simple", StringComparison.OrdinalIgnoreCase))
{
replicationStrategy = new SimpleReplicationStrategy(GetReplicationFactor(configuration));
}
else if (replStratefyCfg.Equals("network_topology", StringComparison.OrdinalIgnoreCase))
{
int replicationFactor = GetReplicationFactor(configuration);
var settings = new List <NetworkTopologyReplicationStrategy.DataCenterSettings>();
string[] datacenters = configuration["cronus_projections_cassandra__datacenters"].Split(',');
foreach (var datacenter in datacenters)
{
var setting = new NetworkTopologyReplicationStrategy.DataCenterSettings(datacenter, replicationFactor);
settings.Add(setting);
}
replicationStrategy = new NetworkTopologyReplicationStrategy(settings);
}
return(replicationStrategy);
}
public CassandraEventStoreStorageManager(ISession session, string keyspace, ICassandraEventStoreTableNameStrategy tableNameStrategy, ICassandraReplicationStrategy replicationStrategy)
{
this.session = session;
this.keyspace = keyspace;
this.tableNameStrategy = tableNameStrategy;
this.replicationStrategy = replicationStrategy;
}
private void CreateKeyspace(string keyspace, ICassandraReplicationStrategy replicationStrategy)
{
var createKeySpaceQuery = replicationStrategy.CreateKeySpaceTemplate(keyspace);
session.Execute(createKeySpaceQuery);
session.ChangeKeyspace(keyspace);
}
public CassandraProvider(IConfiguration configuration, IKeyspaceNamingStrategy keyspaceNamingStrategy, ICassandraReplicationStrategy replicationStrategy, IInitializer initializer = null)
{
if (configuration is null)
{
throw new ArgumentNullException(nameof(configuration));
}
if (keyspaceNamingStrategy is null)
{
throw new ArgumentNullException(nameof(keyspaceNamingStrategy));
}
if (replicationStrategy is null)
{
throw new ArgumentNullException(nameof(replicationStrategy));
}
this.configuration = configuration;
this.keyspaceNamingStrategy = keyspaceNamingStrategy;
this.replicationStrategy = replicationStrategy;
this.initializer = initializer;
}
internal ICassandraReplicationStrategy GetReplicationStrategy()
{
ICassandraReplicationStrategy replicationStrategy = null;
if (options.ReplicationStrategy.Equals("simple", StringComparison.OrdinalIgnoreCase))
{
replicationStrategy = new SimpleReplicationStrategy(options.ReplicationFactor);
}
else if (options.ReplicationStrategy.Equals("network_topology", StringComparison.OrdinalIgnoreCase))
{
var settings = new List <NetworkTopologyReplicationStrategy.DataCenterSettings>();
foreach (var datacenter in options.Datacenters)
{
var setting = new NetworkTopologyReplicationStrategy.DataCenterSettings(datacenter, options.ReplicationFactor);
settings.Add(setting);
}
replicationStrategy = new NetworkTopologyReplicationStrategy(settings);
}
return(replicationStrategy);
}
public CassandraProvider(IOptionsMonitor <CassandraProviderOptions> optionsMonitor, IKeyspaceNamingStrategy keyspaceNamingStrategy, ICassandraReplicationStrategy replicationStrategy, ILogger <CassandraProvider> logger, IInitializer initializer = null)
{
if (optionsMonitor is null)
{
throw new ArgumentNullException(nameof(optionsMonitor));
}
if (keyspaceNamingStrategy is null)
{
throw new ArgumentNullException(nameof(keyspaceNamingStrategy));
}
if (replicationStrategy is null)
{
throw new ArgumentNullException(nameof(replicationStrategy));
}
this.options = optionsMonitor.CurrentValue;
this.keyspaceNamingStrategy = keyspaceNamingStrategy;
this.replicationStrategy = replicationStrategy;
this.initializer = initializer;
this.logger = logger;
}
/// <summary>
/// Use to override the default replication strategy.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="self"></param>
/// <param name="replicationStrategy">Cassandra replication strategy.</param>
/// <returns></returns>
public static T SetReplicationStrategy <T>(this T self, ICassandraReplicationStrategy replicationStrategy) where T : ICassandraEventStoreSettings
{
self.ReplicationStrategy = replicationStrategy;
return(self);
}
