opendal/services/alluxio/
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 std::sync::Arc;
19
20use super::core::AlluxioCore;
21use crate::raw::*;
22use crate::*;
23
24pub type AlluxioWriters = AlluxioWriter;
25
26pub struct AlluxioWriter {
27    core: Arc<AlluxioCore>,
28
29    _op: OpWrite,
30    path: String,
31    stream_id: Option<u64>,
32}
33
34impl AlluxioWriter {
35    pub fn new(core: Arc<AlluxioCore>, _op: OpWrite, path: String) -> Self {
36        AlluxioWriter {
37            core,
38            _op,
39            path,
40            stream_id: None,
41        }
42    }
43}
44
45impl oio::Write for AlluxioWriter {
46    async fn write(&mut self, bs: Buffer) -> Result<()> {
47        let stream_id = match self.stream_id {
48            Some(stream_id) => stream_id,
49            None => {
50                let stream_id = self.core.create_file(&self.path).await?;
51                self.stream_id = Some(stream_id);
52                stream_id
53            }
54        };
55        self.core.write(stream_id, bs).await?;
56        Ok(())
57    }
58
59    async fn close(&mut self) -> Result<Metadata> {
60        let Some(stream_id) = self.stream_id else {
61            return Ok(Metadata::default());
62        };
63        self.core.close(stream_id).await?;
64
65        Ok(Metadata::default())
66    }
67
68    async fn abort(&mut self) -> Result<()> {
69        Err(Error::new(
70            ErrorKind::Unsupported,
71            "AlluxioWriter doesn't support abort",
72        ))
73    }
74}
opendal/services/alluxio/writer.rs

opendal/services/alluxio/
writer.rs
