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/**
* MIT License
*
* Copyright (c) 2010 - 2020 The OSHI Project Contributors: https://github.com/oshi/oshi/graphs/contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package oshi.software.os;
import java.util.List;
import oshi.annotation.concurrent.ThreadSafe;
/**
* The File System is a logical arrangement, usually in a hierarchial tree,
* where files are placed for storage and retrieval. It may consist of one or
* more file stores.
*/
@ThreadSafe
public interface FileSystem {
/**
* Get file stores on this machine
*
* Instantiates an {@code UnmodifiableList} of
* {@link oshi.software.os.OSFileStore} objects, representing a storage pool,
* device, partition, volume, concrete file system or other implementation
* specific means of file storage.
*
* @return An {@code UnmodifiableList} of {@link oshi.software.os.OSFileStore}
* objects or an empty array if none are present.
*/
List getFileStores();
/**
* Get file stores on this machine
*
* Instantiates an {@code UnmodifiableList} of
* {@link oshi.software.os.OSFileStore} objects, representing a storage pool,
* device, partition, volume, concrete file system or other implementation
* specific means of file storage.
*
* @param localOnly
* If true, filters the list to only local file stores.
*
* @return An {@code UnmodifiableList} of {@link oshi.software.os.OSFileStore}
* objects or an empty array if none are present.
*/
List getFileStores(boolean localOnly);
/**
* The current number of open file descriptors. A file descriptor is an abstract
* handle used to access I/O resources such as files and network connections. On
* UNIX-based systems there is a system-wide limit on the number of open file
* descriptors.
*
* On Windows systems, this method returns the total number of handles held by
* Processes. While Windows handles are conceptually similar to file
* descriptors, they may also refer to a number of non-I/O related objects.
*
* @return The number of open file descriptors if available, 0 otherwise.
*/
long getOpenFileDescriptors();
/**
* The maximum number of open file descriptors. A file descriptor is an abstract
* handle used to access I/O resources such as files and network connections. On
* UNIX-based systems there is a system-wide limit on the number of open file
* descriptors.
*
* On Windows systems, this method returns the theoretical max number of handles
* (2^24-2^15 on 32-bit, 2^24-2^16 on 64-bit). There may be a lower per-process
* limit. While Windows handles are conceptually similar to file descriptors,
* they may also refer to a number of non-I/O related objects.
*
* @return The maximum number of file descriptors if available, 0 otherwise.
*/
long getMaxFileDescriptors();
}
