diqiu50 commented on code in PR #5915: URL: https://github.com/apache/gravitino/pull/5915#discussion_r1897140539
########## clients/filesystem-fuse/src/memory_filesystem.rs: ########## @@ -0,0 +1,250 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +use crate::filesystem::{FileReader, FileStat, FileWriter, PathFileSystem, Result}; +use crate::opened_file::{OpenFileFlags, OpenedFile}; +use async_trait::async_trait; +use bytes::Bytes; +use fuse3::FileType::{Directory, RegularFile}; +use fuse3::{Errno, FileType}; +use std::collections::BTreeMap; +use std::path::{Path, PathBuf}; +use std::sync::{Arc, Mutex, RwLock}; + +// Simple in-memory file implementation of MemoryFileSystem +struct MemoryFile { + kind: FileType, + data: Arc<Mutex<Vec<u8>>>, +} + +// MemoryFileSystem is a simple in-memory filesystem implementation +// It is used for testing purposes +pub struct MemoryFileSystem { + // file_map is a map of file name to file size + file_map: RwLock<BTreeMap<PathBuf, MemoryFile>>, +} + +impl MemoryFileSystem { + const FS_META_FILE_NAME: &'static str = "/.gvfs_meta"; + + pub(crate) async fn new() -> Self { + Self { + file_map: RwLock::new(Default::default()), + } + } + + fn create_file_stat(&self, path: &Path, file: &MemoryFile) -> FileStat { + match file.kind { + Directory => FileStat::new_dir_filestat_with_path(path), + _ => { + FileStat::new_file_filestat_with_path(path, file.data.lock().unwrap().len() as u64) + } + } + } +} + +#[async_trait] +impl PathFileSystem for MemoryFileSystem { + async fn init(&self) -> Result<()> { + let root_file = MemoryFile { + kind: Directory, + data: Arc::new(Mutex::new(Vec::new())), + }; + let root_path = PathBuf::from("/"); + self.file_map.write().unwrap().insert(root_path, root_file); + + let meta_file = MemoryFile { + kind: RegularFile, + data: Arc::new(Mutex::new(Vec::new())), + }; + let meta_file_path = Path::new(Self::FS_META_FILE_NAME).to_path_buf(); + self.file_map + .write() + .unwrap() + .insert(meta_file_path, meta_file); + Ok(()) + } + + async fn stat(&self, path: &Path) -> Result<FileStat> { + self.file_map + .read() + .unwrap() + .get(path) + .map(|x| self.create_file_stat(path, x)) + .ok_or(Errno::from(libc::ENOENT)) + } + + async fn read_dir(&self, path: &Path) -> Result<Vec<FileStat>> { + let file_map = self.file_map.read().unwrap(); + + let results: Vec<FileStat> = file_map + .iter() + .filter(|x| path_in_dir(path, x.0)) Review Comment: fix -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@gravitino.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
