Examples with PagesSerde com.facebook.presto.spi.page.PagesSerde used on opensource projects

Example 11 with PagesSerde

use of com.facebook.presto.spi.page.PagesSerde in project presto by prestodb.

the class EchoFirstInputThriftUdfService method invokeUdf.

@Override
public ListenableFuture<ThriftUdfResult> invokeUdf(ThriftUdfRequest request) throws ThriftUdfServiceException {
    ThriftUdfPage inputs = request.getInputs();
    ThriftUdfPage result;
    switch(inputs.getPageFormat()) {
        case PRESTO_THRIFT:
            PrestoThriftPage thriftPage = inputs.getThriftPage();
            if (thriftPage.getThriftBlocks().isEmpty()) {
                throw toThriftUdfServiceException(false, EchoFirstInputErrorCode.GENERIC_INTERNAL_ERROR.toErrorCode(), new UnsupportedOperationException("No input to echo"));
            }
            result = thriftPage(new PrestoThriftPage(ImmutableList.of(thriftPage.getThriftBlocks().get(0)), inputs.getThriftPage().getPositionCount()));
            break;
        case PRESTO_SERIALIZED:
            PagesSerde pagesSerde = new PagesSerde(blockEncodingSerde, Optional.empty(), Optional.empty(), Optional.empty());
            Page page = pagesSerde.deserialize(inputs.getPrestoPage().toSerializedPage());
            if (page.getChannelCount() == 0) {
                throw toThriftUdfServiceException(false, EchoFirstInputErrorCode.GENERIC_INTERNAL_ERROR.toErrorCode(), new UnsupportedOperationException("No input to echo"));
            }
            result = prestoPage(pagesSerde.serialize(new Page(page.getBlock(0))));
            break;
        default:
            throw new UnsupportedOperationException();
    }
    return immediateFuture(new ThriftUdfResult(result, new ThriftUdfStats(100)));
}