tustvold commented on code in PR #5753:
URL: https://github.com/apache/arrow-rs/pull/5753#discussion_r1597482498
##########
parquet/src/arrow/async_writer/mod.rs:
##########
@@ -59,13 +59,59 @@ use crate::{
};
use arrow_array::RecordBatch;
use arrow_schema::SchemaRef;
+use bytes::Bytes;
+use futures::future::BoxFuture;
+use futures::FutureExt;
use tokio::io::{AsyncWrite, AsyncWriteExt};
-/// Encodes [`RecordBatch`] to parquet, outputting to an [`AsyncWrite`]
+/// The asynchronous interface used by [`AsyncArrowWriter`] to write parquet
files
+pub trait AsyncFileWriter: Send {
+ /// Write the provided bytes to the underlying writer
+ ///
+ /// The underlying writer CAN decide to buffer the data or write it
immediately.
+ /// This design allows the writer implementer to control the buffering and
I/O scheduling.
+ fn write(&mut self, bs: Bytes) -> BoxFuture<'_, Result<()>>;
Review Comment:
We should document atomicity requirements for this method
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