opendal/services/hdfs_native/
writer.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use crate::raw::*;
19use crate::services::hdfs_native::error::parse_hdfs_error;
20use crate::*;
21use hdfs_native::file::FileWriter;
22pub struct HdfsNativeWriter {
23    f: FileWriter,
24    size: u64,
25}
26
27impl HdfsNativeWriter {
28    pub fn new(f: FileWriter, initial_size: u64) -> Self {
29        HdfsNativeWriter {
30            f,
31            size: initial_size,
32        }
33    }
34}
35
36impl oio::Write for HdfsNativeWriter {
37    async fn write(&mut self, mut buf: Buffer) -> Result<()> {
38        let len = buf.len() as u64;
39
40        for bs in buf.by_ref() {
41            self.f.write(bs).await.map_err(parse_hdfs_error)?;
42        }
43
44        self.size += len;
45        Ok(())
46    }
47
48    async fn close(&mut self) -> Result<Metadata> {
49        self.f.close().await.map_err(parse_hdfs_error)?;
50
51        Ok(Metadata::default().with_content_length(self.size))
52    }
53
54    async fn abort(&mut self) -> Result<()> {
55        Err(Error::new(
56            ErrorKind::Unsupported,
57            "HdfsNativeWriter doesn't support abort",
58        ))
59    }
60}
opendal/services/hdfs_native/writer.rs

opendal/services/hdfs_native/
writer.rs
