[ARROW-5224] [Java] Add APIs for supporting directly serialize/deserialize ValueVector

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Won't Do
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/16718
• Assignee: Unassigned
• Reporter: Ji Liu
• Created: 28/Apr/19 02:49
• Updated: 11/Jan/23 07:39
• Resolved: 03/Jul/19 02:08

Description

There is no API to directly serialize/deserialize ValueVector. The only way to implement this is to put a single FieldVector in VectorSchemaRoot and convert it to ArrowRecordBatch, and the deserialize process is as well. 

Provide a utility class to implement this may be better, I know all serializations should follow IPC format so that data can be shared between different Arrow implementations. But for users who only use Java API and want to do some further optimization, this seem to be no problem and we could provide them a more option.

This may take some benefits for Java user who only use ValueVector rather than IPC series classes such as ArrowReordBatch:

• We could do some shuffle optimization such as compression and some encoding algorithm for numerical type which could greatly improve performance.
• Do serialize/deserialize with the actual buffer size within vector since the buffer size is power of 2 which is actually bigger than it really need.
• Reduce data conversion(VectorSchemaRoot, ArrowRecordBatch etc) to make it user-friendly.

 

Issue Links

• is blocked by: ARROW-5206 [Java] Add APIs in MessageSerializer to directly serialize/deserialize ArrowBuf
• links to: GitHub Pull Request #4280