lidavidm commented on issue #36443:
URL: https://github.com/apache/arrow/issues/36443#issuecomment-1688296978
It would generally look like
```java
try (final ArrowRecordBatch batch = ...) {
exportBatch(batch); // increments reference count
}
// batch is not freed here unless exportBatch threw (but reference count is
decreased)
// when Python frees the arrow::RecordBatch, the C Data callback will
// decrement the reference count and actually free the batch
```
The only problem is the lifetime of the `BufferAllocator` which isn't
solvable in C Data Interface; either the Java application needs to have a
singleton allocator or (preferably) it should tie the lifetime of the allocator
to something else (e.g. an init/finalize call, or if the Java application
implements a reader or some other object, it should tie the allocator to that
object)
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