// 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());
}
public KSMetaData reloadAttributes() throws IOException {
Row ksDefRow = SystemTable.readSchemaRow(name);
if (ksDefRow.cf == null)
throw new IOException(
String.format(
"%s not found in the schema definitions table (%s).",
name, SystemTable.SCHEMA_KEYSPACES_CF));
return fromSchema(ksDefRow, Collections.<CFMetaData>emptyList());
}
KSMetaData(
String name,
Class<? extends AbstractReplicationStrategy> strategyClass,
Map<String, String> strategyOptions,
boolean durableWrites,
Iterable<CFMetaData> cfDefs) {
this.name = name;
this.strategyClass = strategyClass == null ? NetworkTopologyStrategy.class : strategyClass;
this.strategyOptions = strategyOptions;
Map<String, CFMetaData> cfmap = new HashMap<String, CFMetaData>();
for (CFMetaData cfm : cfDefs) cfmap.put(cfm.cfName, cfm);
this.cfMetaData = Collections.unmodifiableMap(cfmap);
this.durableWrites = durableWrites;
}
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));
}
/**
* Deserialize ColumnFamilies from low-level schema representation, all of them belong to the same
* keyspace
*
* @param row
* @return map containing name of the ColumnFamily and it's metadata for faster lookup
*/
public static Map<String, CFMetaData> deserializeColumnFamilies(Row row) {
if (row.cf == null) return Collections.emptyMap();
Map<String, CFMetaData> cfms = new HashMap<String, CFMetaData>();
UntypedResultSet results =
QueryProcessor.resultify("SELECT * FROM system.schema_columnfamilies", row);
for (UntypedResultSet.Row result : results) {
CFMetaData cfm = CFMetaData.fromSchema(result);
cfms.put(cfm.cfName, cfm);
}
for (CFMetaData cfm : cfms.values()) {
Row columnRow = ColumnDefinition.readSchema(cfm.ksName, cfm.cfName);
for (ColumnDefinition cd : ColumnDefinition.fromSchema(columnRow, cfm))
cfm.column_metadata.put(cd.name, cd);
}
return cfms;
}