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);
}
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);
}