Examples with Bytes herddb.utils.Bytes used on opensource projects

Example 61 with Bytes

use of herddb.utils.Bytes in project herddb by diennea.

the class TableManager method executeUpdate.

private StatementExecutionResult executeUpdate(UpdateStatement update, Transaction transaction, StatementEvaluationContext context) throws StatementExecutionException, DataStorageManagerException {
    AtomicInteger updateCount = new AtomicInteger();
    Holder<Bytes> lastKey = new Holder<>();
    Holder<byte[]> lastValue = new Holder<>();
    /*
         an update can succeed only if the row is valid, the key is contains in the "keys" structure
         the update will simply override the value of the row, assigning a null page to the row
         the update can have a 'where' predicate which is to be evaluated against the decoded row, the update will be executed only if the predicate returns boolean 'true' value  (CAS operation)
         locks: the update  uses a lock on the the key
         */
    RecordFunction function = update.getFunction();
    long transactionId = transaction != null ? transaction.transactionId : 0;
    Predicate predicate = update.getPredicate();
    ScanStatement scan = new ScanStatement(table.tablespace, table, predicate);
    accessTableData(scan, context, new ScanResultOperation() {

        @Override
        public void accept(Record actual) throws StatementExecutionException, LogNotAvailableException, DataStorageManagerException {
            byte[] newValue = function.computeNewValue(actual, context, tableContext);
            final long size = DataPage.estimateEntrySize(actual.key, newValue);
            if (size > maxLogicalPageSize) {
                throw new RecordTooBigException("New version of record " + actual.key + " is to big to be update: new size " + size + ", actual size " + DataPage.estimateEntrySize(actual) + ", max size " + maxLogicalPageSize);
            }
            LogEntry entry = LogEntryFactory.update(table, actual.key.data, newValue, transaction);
            CommitLogResult pos = log.log(entry, entry.transactionId <= 0);
            apply(pos, entry, false);
            lastKey.value = actual.key;
            lastValue.value = newValue;
            updateCount.incrementAndGet();
        }
    }, transaction, true, true);
    return new DMLStatementExecutionResult(transactionId, updateCount.get(), lastKey.value, update.isReturnValues() ? (lastValue.value != null ? Bytes.from_array(lastValue.value) : null) : null);
}

Example 62 with Bytes

use of herddb.utils.Bytes in project herddb by diennea.

the class TableManager method executeDelete.

private StatementExecutionResult executeDelete(DeleteStatement delete, Transaction transaction, StatementEvaluationContext context) throws StatementExecutionException, DataStorageManagerException {
    AtomicInteger updateCount = new AtomicInteger();
    Holder<Bytes> lastKey = new Holder<>();
    Holder<byte[]> lastValue = new Holder<>();
    long transactionId = transaction != null ? transaction.transactionId : 0;
    Predicate predicate = delete.getPredicate();
    ScanStatement scan = new ScanStatement(table.tablespace, table, predicate);
    accessTableData(scan, context, new ScanResultOperation() {

        @Override
        public void accept(Record actual) throws StatementExecutionException, LogNotAvailableException, DataStorageManagerException {
            LogEntry entry = LogEntryFactory.delete(table, actual.key.data, transaction);
            CommitLogResult pos = log.log(entry, entry.transactionId <= 0);
            apply(pos, entry, false);
            lastKey.value = actual.key;
            lastValue.value = actual.value.data;
            updateCount.incrementAndGet();
        }
    }, transaction, true, true);
    return new DMLStatementExecutionResult(transactionId, updateCount.get(), lastKey.value, delete.isReturnValues() ? (lastValue.value != null ? Bytes.from_array(lastValue.value) : null) : null);
}

Example 63 with Bytes

use of herddb.utils.Bytes in project herddb by diennea.

the class MemoryHashIndexManager method recordDeleted.

@Override
public void recordDeleted(Bytes key, DataAccessor values) {
    Bytes indexKey = RecordSerializer.serializePrimaryKey(values, index, index.columnNames);
    removeValueFromIndex(indexKey, key);
}

Example 64 with Bytes

use of herddb.utils.Bytes in project herddb by diennea.

the class MemoryHashIndexManager method recordUpdated.

@Override
public void recordUpdated(Bytes key, DataAccessor previousValues, DataAccessor newValues) {
    Bytes indexKeyRemoved = RecordSerializer.serializePrimaryKey(previousValues, index, index.columnNames);
    Bytes indexKeyAdded = RecordSerializer.serializePrimaryKey(newValues, index, index.columnNames);
    if (Objects.equals(indexKeyRemoved, indexKeyAdded)) {
        return;
    }
    // BEWARE that this operation is not atomic
    if (indexKeyAdded != null) {
        addValueToIndex(indexKeyAdded, key);
    }
    if (indexKeyRemoved != null) {
        removeValueFromIndex(indexKeyRemoved, key);
    }
}

Example 65 with Bytes

use of herddb.utils.Bytes in project herddb by diennea.

the class MemoryHashIndexManager method recordInserted.

@Override
public void recordInserted(Bytes key, DataAccessor values) {
    Bytes indexKey = RecordSerializer.serializePrimaryKey(values, index, index.columnNames);
    addValueToIndex(indexKey, key);
}