Examples with SerializedStorageHandle com.facebook.presto.spi.storage.SerializedStorageHandle used on opensource projects

Example 1 with SerializedStorageHandle

use of com.facebook.presto.spi.storage.SerializedStorageHandle in project presto by prestodb.

the class TempStorageStandaloneSpiller method spill.

public SerializedStorageHandle spill(Iterator<Page> pageIterator) {
    List<DataOutput> bufferedPages = new ArrayList<>();
    int bufferedBytes = 0;
    IOException ioException = null;
    TempDataSink tempDataSink = null;
    try {
        tempDataSink = tempStorage.create(tempDataOperationContext);
        while (pageIterator.hasNext()) {
            Page page = pageIterator.next();
            List<Page> splitPages = splitPage(page, DEFAULT_MAX_PAGE_SIZE_IN_BYTES);
            for (Page splitPage : splitPages) {
                SerializedPage serializedPage = serde.serialize(splitPage);
                spillerStats.addToTotalSpilledBytes(serializedPage.getSizeInBytes());
                PageDataOutput pageDataOutput = new PageDataOutput(serializedPage);
                bufferedBytes += toIntExact(pageDataOutput.size());
                bufferedPages.add(pageDataOutput);
                if (bufferedBytes > maxBufferSizeInBytes) {
                    flushBufferedPages(tempDataSink, bufferedPages);
                    bufferedBytes = 0;
                }
            }
        }
        // Flush remaining buffered pages
        if (!bufferedPages.isEmpty()) {
            flushBufferedPages(tempDataSink, bufferedPages);
        }
        TempStorageHandle tempStorageHandle = tempDataSink.commit();
        return new SerializedStorageHandle(tempStorage.serializeHandle(tempStorageHandle));
    } catch (IOException e) {
        ioException = e;
        try {
            if (tempDataSink != null) {
                tempDataSink.rollback();
            }
        } catch (IOException exception) {
            if (ioException != exception) {
                ioException.addSuppressed(exception);
            }
        }
    } finally {
        try {
            if (tempDataSink != null) {
                tempDataSink.close();
            }
        } catch (IOException e) {
            if (ioException == null) {
                ioException = e;
            } else if (ioException != e) {
                ioException.addSuppressed(e);
            }
            throw new PrestoException(GENERIC_SPILL_FAILURE, "Failed to spill pages", ioException);
        }
    }
    throw new PrestoException(GENERIC_SPILL_FAILURE, "Failed to spill pages", ioException);
}