public static ReplicationParams fromMap(Map<String, String> map) {
Map<String, String> options = new HashMap<>(map);
String className = options.remove(CLASS);
Class<? extends AbstractReplicationStrategy> klass =
AbstractReplicationStrategy.getClass(className);
return new ReplicationParams(klass, options);
}
// For new user created keyspaces (through CQL)
public static KSMetaData newKeyspace(
String name, String strategyName, Map<String, String> options) throws ConfigurationException {
Class<? extends AbstractReplicationStrategy> cls =
AbstractReplicationStrategy.getClass(strategyName);
if (cls.equals(LocalStrategy.class))
throw new ConfigurationException(
"Unable to use given strategy class: LocalStrategy is reserved for internal use.");
return new KSMetaData(name, cls, options, true, Collections.<CFMetaData>emptyList());
}
/**
* Deserialize only Keyspace attributes without nested ColumnFamilies
*
* @param row Keyspace attributes in serialized form
* @return deserialized keyspace without cf_defs
* @throws IOException if deserialization failed
*/
public static KSMetaData fromSchema(Row row, Iterable<CFMetaData> cfms) throws IOException {
UntypedResultSet.Row result =
QueryProcessor.resultify("SELECT * FROM system.schema_keyspaces", row).one();
try {
return new KSMetaData(
result.getString("name"),
AbstractReplicationStrategy.getClass(result.getString("strategy_class")),
fromJsonMap(result.getString("strategy_options")),
result.getBoolean("durable_writes"),
cfms);
} catch (ConfigurationException e) {
throw new RuntimeException(e);
}
}
public static KSMetaData fromThrift(KsDef ksd, CFMetaData... cfDefs)
throws ConfigurationException {
Class<? extends AbstractReplicationStrategy> cls =
AbstractReplicationStrategy.getClass(ksd.strategy_class);
if (cls.equals(LocalStrategy.class))
throw new ConfigurationException(
"Unable to use given strategy class: LocalStrategy is reserved for internal use.");
return new KSMetaData(
ksd.name,
cls,
ksd.strategy_options == null
? Collections.<String, String>emptyMap()
: ksd.strategy_options,
ksd.durable_writes,
Arrays.asList(cfDefs));
}