Examples with SharedBuffer com.facebook.presto.orc.stream.SharedBuffer used on opensource projects

Example 6 with SharedBuffer

use of com.facebook.presto.orc.stream.SharedBuffer in project presto by prestodb.

the class StripeReader method readStripeFooter.

public StripeFooter readStripeFooter(StripeId stripeId, StripeInformation stripe, OrcAggregatedMemoryContext systemMemoryUsage) throws IOException {
    long footerOffset = stripe.getOffset() + stripe.getIndexLength() + stripe.getDataLength();
    int footerLength = toIntExact(stripe.getFooterLength());
    // read the footer
    Slice footerSlice = stripeMetadataSource.getStripeFooterSlice(orcDataSource, stripeId, footerOffset, footerLength, cacheable);
    try (InputStream inputStream = new OrcInputStream(orcDataSource.getId(), // Memory is not accounted as the buffer is expected to be tiny and will be immediately discarded
    new SharedBuffer(NOOP_ORC_LOCAL_MEMORY_CONTEXT), footerSlice.getInput(), decompressor, Optional.empty(), systemMemoryUsage, footerLength)) {
        return metadataReader.readStripeFooter(orcDataSource.getId(), types, inputStream);
    }
}