Simplified example. (#619)

examples/s3/Cargo.toml

@@ -8,3 +8,4 @@ arrow2 = { path = "../../", default-features = false, features = ["io_parquet",
 rust-s3 = { version = "0.27.0", features = ["tokio"] }
 futures = "0.3"
 tokio = { version = "1.0.0", features = ["macros", "rt-multi-thread"] }
+range-reader = "0.1"

examples/s3/src/main.rs

@@ -5,11 +5,9 @@ use arrow2::io::parquet::read::{
     decompress, get_page_stream, page_stream_to_array, read_metadata_async,
 };
 use futures::{future::BoxFuture, StreamExt};
+use range_reader::{RangeOutput, RangedAsyncReader};
 use s3::Bucket;
 
-mod stream;
-use stream::{RangedStreamer, SeekOutput};
-
 #[tokio::main]
 async fn main() -> Result<()> {
     let bucket_name = "dev-jorgecardleitao";
@@ -36,12 +34,12 @@ async fn main() -> Result<()> {
                 .map_err(|x| std::io::Error::new(std::io::ErrorKind::Other, x.to_string()))?;
             println!("got {}/{} bytes starting at {}", data.len(), length, start);
             data.truncate(length);
-            Ok(SeekOutput { start, data })
-        }) as BoxFuture<'static, std::io::Result<SeekOutput>>
+            Ok(RangeOutput { start, data })
+        }) as BoxFuture<'static, std::io::Result<RangeOutput>>
     });
 
-    // at least 4kb per s3 request. Adjust as you like.
-    let mut reader = RangedStreamer::new(length, 4 * 1024, range_get);
+    // at least 4kb per s3 request. Adjust to your liking.
+    let mut reader = RangedAsyncReader::new(length, 4 * 1024, range_get);
 
     let metadata = read_metadata_async(&mut reader).await?;