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;
}
/**
* 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;
}
public RowMutation toSchema(long timestamp) {
RowMutation rm = new RowMutation(Table.SYSTEM_TABLE, SystemTable.getSchemaKSKey(name));
ColumnFamily cf = rm.addOrGet(SystemTable.SCHEMA_KEYSPACES_CF);
cf.addColumn(Column.create(name, timestamp, "name"));
cf.addColumn(Column.create(durableWrites, timestamp, "durable_writes"));
cf.addColumn(Column.create(strategyClass.getName(), timestamp, "strategy_class"));
cf.addColumn(Column.create(json(strategyOptions), timestamp, "strategy_options"));
for (CFMetaData cfm : cfMetaData.values()) cfm.toSchema(rm, timestamp);
return rm;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(name)
.append(", rep strategy:")
.append(strategyClass.getSimpleName())
.append("{")
.append(StringUtils.join(cfMetaData.values(), ", "))
.append("}")
.append(", durable_writes: ")
.append(durableWrites);
return sb.toString();
}
public KSMetaData validate() throws ConfigurationException {
if (!CFMetaData.isNameValid(name))
throw new ConfigurationException(
String.format(
"Invalid keyspace name: shouldn't be empty nor more than %s characters long (got \"%s\")",
Schema.NAME_LENGTH, name));
// Attempt to instantiate the ARS, which will throw a ConfigException if the strategy_options
// aren't fully formed
TokenMetadata tmd = StorageService.instance.getTokenMetadata();
IEndpointSnitch eps = DatabaseDescriptor.getEndpointSnitch();
AbstractReplicationStrategy.createReplicationStrategy(
name, strategyClass, tmd, eps, strategyOptions);
for (CFMetaData cfm : cfMetaData.values()) cfm.validate();
return this;
}
/**
* Deserialize Keyspace with nested ColumnFamilies
*
* @param serializedKs Keyspace in serialized form
* @param serializedCFs Collection of the serialized ColumnFamilies
* @return deserialized keyspace with cf_defs
* @throws IOException if deserialization failed
*/
public static KSMetaData fromSchema(Row serializedKs, Row serializedCFs) throws IOException {
Map<String, CFMetaData> cfs = deserializeColumnFamilies(serializedCFs);
return fromSchema(serializedKs, cfs.values());
}
public static Map<String, String> optsWithRF(final Integer rf) {
Map<String, String> ret = new HashMap<String, String>();
ret.put("replication_factor", rf.toString());
return ret;
}