@Override
public Map<TableName, SequenceValue> initSequences(
String tenantId, List<TableName> sequences, long timestamp) throws SQLException {
Map<TableName, SequenceValue> sequenceMap = Maps.newHashMapWithExpectedSize(sequences.size());
for (TableName name : sequences) {
PSequence sequence = metaData.getSequence(name);
if (sequence == null) {
throw new SequenceNotFoundException(name.getSchemaName(), name.getTableName());
}
SequenceValue existingValue = sequenceMap.get(name);
SequenceValue value = new SequenceValue(sequence);
if (existingValue != null) {
value.currentValue = existingValue.currentValue;
value.nextValue = existingValue.nextValue;
}
sequenceMap.put(name, value);
}
return sequenceMap;
}
@Override
public Long createSequence(
String tenantId,
String schemaName,
String sequenceName,
long startWith,
long incrementBy,
long timestamp)
throws SQLException {
TableName tableName = TableName.create(schemaName, sequenceName);
if (metaData.getSequence(tableName) != null) {
return null;
}
addSequence(tableName, new PSequenceImpl(incrementBy, startWith, timestamp));
SequenceValue value = new SequenceValue(incrementBy, startWith, timestamp);
value.currentValue = startWith;
value.nextValue = startWith;
sequenceMap.put(tableName, value);
return HConstants.LATEST_TIMESTAMP;
}
@Override
public List<TableName> reserveSequences(
String tenantId,
Set<Map.Entry<TableName, SequenceValue>> sequences,
int batchSize,
long timestamp)
throws SQLException {
List<TableName> droppedSequences = Lists.newArrayListWithExpectedSize(sequences.size());
for (Map.Entry<TableName, SequenceValue> entry : sequences) {
SequenceValue value = entry.getValue();
if (value.currentValue == value.nextValue) {
if (metaData.getSequence(entry.getKey()) == null) {
droppedSequences.add(entry.getKey());
continue;
}
value.nextValue += value.incrementBy * batchSize;
}
}
return droppedSequences;
}