@Override
public void nextValue(RowKey key, IntegralDataTypeHolder value, int increment, int initialValue) {
final AdvancedCache<RowKey, Object> identifierCache =
provider.getCache(IDENTIFIER_STORE).getAdvancedCache();
boolean done = false;
do {
// read value
// skip locking proposed by Sanne
Object valueFromDb = identifierCache.withFlags(Flag.SKIP_LOCKING).get(key);
if (valueFromDb == null) {
// if not there, insert initial value
value.initialize(initialValue);
// TODO should we use GridTypes here?
valueFromDb = new Long(value.makeValue().longValue());
final Object oldValue = identifierCache.putIfAbsent(key, valueFromDb);
// check in case somebody has inserted it behind our back
if (oldValue != null) {
value.initialize(((Number) oldValue).longValue());
valueFromDb = oldValue;
}
} else {
// read the value from the table
value.initialize(((Number) valueFromDb).longValue());
}
// update value
final IntegralDataTypeHolder updateValue = value.copy();
// increment value
updateValue.add(increment);
// TODO should we use GridTypes here?
final Object newValueFromDb = updateValue.makeValue().longValue();
done = identifierCache.replace(key, valueFromDb, newValueFromDb);
} while (!done);
}
@Override
public void nextValue(RowKey key, IntegralDataTypeHolder value, int increment, int initialValue) {
value.initialize(getDataStore().nextValue(key, increment, initialValue));
}