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 void TestUpdateKeyspaceWithMultiDcConfiguration()
{
var clusterConnection = cluster.RetrieveClusterConnection();
var keyspaceName = TestSchemaUtils.GetRandomKeyspaceName();
var createdKeyspace = new Keyspace
{
Name = keyspaceName,
ReplicationStrategy = NetworkTopologyReplicationStrategy.Create(new[]
{
new DataCenterReplicationFactor("dc1", 3),
new DataCenterReplicationFactor("dc2", 5)
})
};
clusterConnection.AddKeyspace(createdKeyspace);
createdKeyspace.ReplicationStrategy = NetworkTopologyReplicationStrategy.Create(new[]
{
new DataCenterReplicationFactor("dc3", 7)
});
clusterConnection.UpdateKeyspace(createdKeyspace);
var keyspaces = clusterConnection.RetrieveKeyspaces();
var actualKeyspace = keyspaces.First(x => x.Name == keyspaceName);
AssertKeyspacePropertiesEquals(createdKeyspace, actualKeyspace);
}
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 void TestUpdateKeyspace(bool durableWrites)
{
var keyspaceName = Guid.NewGuid().ToString("N");
cassandraCluster.ActualizeKeyspaces(new[]
{
new KeyspaceScheme
{
Name = keyspaceName,
Configuration = new KeyspaceConfiguration
{
DurableWrites = durableWrites,
ReplicationStrategy = SimpleReplicationStrategy.Create(1),
ColumnFamilies = new[]
{
new ColumnFamily
{
Name = "1"
},
new ColumnFamily
{
Name = "2"
},
new ColumnFamily
{
Name = "3"
}
}
}
}
});
var keyspaces = cassandraCluster.RetrieveClusterConnection().RetrieveKeyspaces().ToArray();
AssertKeyspacesEquals(new Keyspace
{
Name = keyspaceName,
DurableWrites = durableWrites,
ReplicationStrategy = SimpleReplicationStrategy.Create(1),
ColumnFamilies = new Dictionary <string, ColumnFamily>
{
{ "1", new ColumnFamily {
Name = "1"
} },
{ "2", new ColumnFamily {
Name = "2"
} },
{ "3", new ColumnFamily {
Name = "3"
} }
}
}, keyspaces.Single(keyspace1 => keyspace1.Name == keyspaceName));
cassandraCluster.RetrieveClusterConnection().UpdateKeyspace(new Keyspace
{
Name = keyspaceName,
DurableWrites = durableWrites,
ReplicationStrategy = NetworkTopologyReplicationStrategy.Create(new[] { new DataCenterReplicationFactor("dc1", 3) })
});
var keyspace = cassandraCluster.RetrieveClusterConnection().RetrieveKeyspaces().ToArray().Single(keyspace1 => keyspace1.Name == keyspaceName);
AssertKeyspacesEquals(new Keyspace
{
Name = keyspaceName,
DurableWrites = durableWrites,
ReplicationStrategy = NetworkTopologyReplicationStrategy.Create(new[] { new DataCenterReplicationFactor("dc1", 3) }),
ColumnFamilies = new Dictionary <string, ColumnFamily>
{
{ "1", new ColumnFamily {
Name = "1"
} },
{ "2", new ColumnFamily {
Name = "2"
} },
{ "3", new ColumnFamily {
Name = "3"
} }
}
}, keyspace);
}