[ARROW-3555] [Plasma] Unify plasma client get function using metadata.

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Component/s: C++ - Plasma
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/19869
• Assignee: Yuhong Guo
• Reporter: Yuhong Guo
• Created: 18/Oct/18 15:12
• Updated: 11/Jan/23 07:28
• Resolved: 29/Oct/18 17:04

Description

Sometimes, it is very hard for the data consumer to know whether an object is a buffer or other objects. If we use try-catch to catch the pyarrow deserialization exception and then using `plasma_client.get_buffer`, the code is not clean.
We may leverage the metadata which is not used at all to mark the buffer data. In the client of other language, this would be simple to implement.

Issue Links

• links to: GitHub Pull Request #2788