[jira] [Created] (MINIFICPP-1644) ProcessSession::read ignores the size/offset of the flowfile

["Martin Zink (Jira)" <ji...@apache.org>]

Martin Zink created MINIFICPP-1644:
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             Summary: ProcessSession::read ignores the size/offset of the flowfile
                 Key: MINIFICPP-1644
                 URL: https://issues.apache.org/jira/browse/MINIFICPP-1644
             Project: Apache NiFi MiNiFi C++
          Issue Type: Improvement
            Reporter: Martin Zink
            Assignee: Martin Zink


 

The ProcessSession::read will read until the resource claims size, not the flowfiles size.

If the flowfiles size/offset doesnt match the size/offset of its resource claim, this could cause problems. One way this could happend is using the _ProcessSession::clone(const std::shared_ptr<core::FlowFile> &parent, int64_t offset, int64_t size)_

The behaviour is also dependant on the type of ContentRepository

e.g.

using FileSystemContentRepository or VolatileContentRepository
{code:java}
auto first_half_clone = session->clone(original_ff, 0, original_ff->getSize()/2);
auto second_half_clone = session->clone(original_ff, original_ff->getSize()/2, original_ff->getSize()/2);
session->read(original_ff, reader);       // Reads foobar
session->read(first_half_clone, reader);  // Reads foobar
session->read(second_half_clone, reader); // Reads bar
{code}
using DatabaseContentRepository
{code:java}
auto first_half_clone = session->clone(original_ff, 0, original_ff->getSize()/2);
auto second_half_clone = session->clone(original_ff, original_ff->getSize()/2, original_ff->getSize()/2);
session->read(original_ff, reader);       // Reads foobar
session->read(first_half_clone, reader);  // Reads foobar
session->read(second_half_clone, reader); // Reads foobar{code}
 



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