/**
* Writes out a bunch of mutations for a single column family.
*
* @param mutations A group of Mutations for the same keyspace and column family.
* @return The ColumnFamilyStore that was used.
*/
public static ColumnFamilyStore writeColumnFamily(List<Mutation> mutations) {
IMutation first = mutations.get(0);
String keyspaceName = first.getKeyspaceName();
UUID cfid = first.getColumnFamilyIds().iterator().next();
for (Mutation rm : mutations) rm.applyUnsafe();
ColumnFamilyStore store = Keyspace.open(keyspaceName).getColumnFamilyStore(cfid);
store.forceBlockingFlush();
return store;
}
private void removeIfPresent(Mutation m, byte[] family, byte[] qualifier) {
Map<byte[], List<KeyValue>> familyMap = m.getFamilyMap();
List<KeyValue> kvs = familyMap.get(family);
if (kvs != null) {
Iterator<KeyValue> iterator = kvs.iterator();
while (iterator.hasNext()) {
KeyValue kv = iterator.next();
if (Bytes.compareTo(kv.getQualifier(), qualifier) == 0) {
iterator.remove();
}
}
}
}
public static void addMutation(
Mutation rm,
String columnFamilyName,
String superColumnName,
long columnName,
String value,
long timestamp) {
CellName cname =
superColumnName == null
? CellNames.simpleDense(getBytes(columnName))
: CellNames.compositeDense(ByteBufferUtil.bytes(superColumnName), getBytes(columnName));
rm.add(columnFamilyName, cname, ByteBufferUtil.bytes(value), timestamp);
}