Examples with ReadOnly io.cdap.cdap.api.annotation.ReadOnly used on opensource projects

Example 6 with ReadOnly

use of io.cdap.cdap.api.annotation.ReadOnly in project cdap by caskdata.

the class PartitionedFileSetDataset method assertNotExists.

// Throws PartitionAlreadyExistsException if the partition key already exists.
// Otherwise, returns the rowkey corresponding to the PartitionKey.
@ReadOnly
byte[] assertNotExists(PartitionKey key, boolean supportNonTransactional) {
    byte[] rowKey = generateRowKey(key, partitioning);
    if (tx == null && supportNonTransactional) {
        if (LOG.isWarnEnabled()) {
            StringBuilder sb = new StringBuilder();
            for (StackTraceElement stackTraceElement : Thread.currentThread().getStackTrace()) {
                sb.append("\n\tat ").append(stackTraceElement.toString());
            }
            SAMPLING_LOG.warn("Operation should be performed within a transaction. " + "This operation may require a transaction in the future. {}", sb);
        }
        // to handle backwards compatibility (user might have called PartitionedFileSet#getPartitionOutput outside
        // of a transaction), we can't check partition existence via the partitionsTable. As an fallback approach,
        // check the filesystem.
        Location partitionLocation = files.getLocation(getOutputPath(key));
        if (exists(partitionLocation)) {
            throw new DataSetException(String.format("Location %s for partition key %s already exists: ", partitionLocation, key));
        }
    } else {
        Row row = partitionsTable.get(rowKey);
        if (!row.isEmpty()) {
            throw new PartitionAlreadyExistsException(getName(), key);
        }
    }
    return rowKey;
}

Example 7 with ReadOnly

use of io.cdap.cdap.api.annotation.ReadOnly in project cdap by caskdata.

the class BufferingTable method get.

/**
 * NOTE: Depending on the use-case, calling this method may be much less
 *       efficient than calling same method with columns as parameters because it may always require round trip to
 *       persistent store
 */
@ReadOnly
@Override
public Row get(byte[] row) {
    ensureTransactionIsStarted();
    reportRead(1);
    try {
        return new Result(row, getRowMap(row));
    } catch (Exception e) {
        LOG.debug("get failed for table: " + getTransactionAwareName() + ", row: " + Bytes.toStringBinary(row), e);
        throw new DataSetException("get failed", e);
    }
}

Example 8 with ReadOnly

use of io.cdap.cdap.api.annotation.ReadOnly in project cdap by cdapio.

the class PartitionedFileSetDataset method getPartition.

@ReadOnly
@Override
public PartitionDetail getPartition(PartitionKey key) {
    byte[] rowKey = generateRowKey(key, partitioning);
    Row row = partitionsTable.get(rowKey);
    if (row.isEmpty()) {
        return null;
    }
    byte[] pathBytes = row.get(RELATIVE_PATH);
    if (pathBytes == null) {
        return null;
    }
    return new BasicPartitionDetail(this, Bytes.toString(pathBytes), key, metadataFromRow(row));
}

Example 9 with ReadOnly

use of io.cdap.cdap.api.annotation.ReadOnly in project cdap by cdapio.

the class BufferingTable method get.

@ReadOnly
@Override
public Row get(byte[] row, byte[] startColumn, byte[] stopColumn, int limit) {
    ensureTransactionIsStarted();
    reportRead(1);
    // checking if the row was deleted inside this tx
    NavigableMap<byte[], Update> buffCols = buff.get(row);
    // potential improvement: do not fetch columns available in in-mem buffer (we know them at this point)
    try {
        Map<byte[], byte[]> persistedCols = getPersisted(row, startColumn, stopColumn, limit);
        // adding server cols, and then overriding with buffered values
        NavigableMap<byte[], byte[]> result = Maps.newTreeMap(Bytes.BYTES_COMPARATOR);
        if (persistedCols != null) {
            result.putAll(persistedCols);
        }
        if (buffCols != null) {
            buffCols = getRange(buffCols, startColumn, stopColumn, limit);
            // null valued columns in in-memory buffer are deletes, so we need to delete them from the result list
            mergeToPersisted(result, buffCols, null);
        }
        // applying limit
        return new Result(row, head(result, limit));
    } catch (Exception e) {
        LOG.debug("get failed for table: " + getTransactionAwareName() + ", row: " + Bytes.toStringBinary(row), e);
        throw new DataSetException("get failed", e);
    }
}

Example 10 with ReadOnly

use of io.cdap.cdap.api.annotation.ReadOnly in project cdap by cdapio.

the class BufferingTable method get.

@ReadOnly
@Override
public List<Row> get(List<Get> gets) {
    ensureTransactionIsStarted();
    try {
        // get persisted, then overwrite with whats buffered
        List<Map<byte[], byte[]>> persistedRows = getPersisted(gets);
        // gets and rows lists are always of the same size
        Preconditions.checkArgument(gets.size() == persistedRows.size(), "Invalid number of rows fetched when performing multi-get. There must be one row for each get.");
        List<Row> result = Lists.newArrayListWithCapacity(persistedRows.size());
        Iterator<Map<byte[], byte[]>> persistedRowsIter = persistedRows.iterator();
        Iterator<Get> getIter = gets.iterator();
        while (persistedRowsIter.hasNext() && getIter.hasNext()) {
            Get get = getIter.next();
            Map<byte[], byte[]> persistedRow = persistedRowsIter.next();
            // navigable copy of the persisted data. Implementation may return immutable or unmodifiable maps,
            // so we make a copy here.
            NavigableMap<byte[], byte[]> rowColumns = Maps.newTreeMap(Bytes.BYTES_COMPARATOR);
            rowColumns.putAll(persistedRow);
            byte[] row = get.getRow();
            NavigableMap<byte[], Update> buffCols = buff.get(row);
            // merge what was in the buffer and what was persisted
            if (buffCols != null) {
                List<byte[]> getColumns = get.getColumns();
                byte[][] columns = getColumns == null ? null : getColumns.toArray(new byte[getColumns.size()][]);
                mergeToPersisted(rowColumns, buffCols, columns);
            }
            result.add(new Result(row, unwrapDeletes(rowColumns)));
        }
        return result;
    } catch (Exception e) {
        LOG.debug("multi-get failed for table: " + getTransactionAwareName(), e);
        throw new DataSetException("multi-get failed", e);
    }
}