opendal/services/dashmap/
core.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::fmt::Debug;
19use std::fmt::Formatter;
20
21use dashmap::DashMap;
22
23use crate::*;
24
25/// Value stored in dashmap cache containing both metadata and content
26#[derive(Clone)]
27pub struct DashmapValue {
28    /// Stored metadata in dashmap cache.
29    pub metadata: Metadata,
30    /// Stored content in dashmap cache.
31    pub content: Buffer,
32}
33
34#[derive(Clone)]
35pub struct DashmapCore {
36    pub cache: DashMap<String, DashmapValue>,
37}
38
39impl Debug for DashmapCore {
40    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
41        f.debug_struct("DashmapCore")
42            .field("size", &self.cache.len())
43            .finish()
44    }
45}
46
47impl DashmapCore {
48    pub fn get(&self, key: &str) -> Result<Option<DashmapValue>> {
49        Ok(self.cache.get(key).map(|v| v.value().clone()))
50    }
51
52    pub fn set(&self, key: &str, value: DashmapValue) -> Result<()> {
53        self.cache.insert(key.to_string(), value);
54        Ok(())
55    }
56
57    pub fn delete(&self, key: &str) -> Result<()> {
58        self.cache.remove(key);
59        Ok(())
60    }
61}