| /* |
| * 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. |
| */ |
| |
| package org.apache.cassandra.io.util; |
| |
| import java.io.IOException; |
| import java.nio.file.FileSystem; |
| |
| import com.google.common.base.StandardSystemProperty; |
| import com.google.common.jimfs.Configuration; |
| import com.google.common.jimfs.Jimfs; |
| |
| import org.apache.cassandra.io.filesystem.ForwardingFileSystem; |
| import org.apache.cassandra.io.filesystem.ListenableFileSystem; |
| |
| public class FileSystems |
| { |
| public static ListenableFileSystem newGlobalInMemoryFileSystem() |
| { |
| return global(jimfs()); |
| } |
| |
| public static ListenableFileSystem global() |
| { |
| return global(File.unsafeGetFilesystem()); |
| } |
| |
| public static ListenableFileSystem global(FileSystem real) |
| { |
| FileSystem current = File.unsafeGetFilesystem(); |
| ListenableFileSystem fs = new ListenableFileSystem(new ForwardingFileSystem(real) |
| { |
| @Override |
| public void close() throws IOException |
| { |
| try |
| { |
| super.close(); |
| } |
| finally |
| { |
| File.unsafeSetFilesystem(current); |
| } |
| } |
| }); |
| File.unsafeSetFilesystem(fs); |
| return fs; |
| } |
| |
| public static FileSystem jimfs() |
| { |
| return Jimfs.newFileSystem(jimfsConfig()); |
| } |
| |
| public static FileSystem jimfs(String name) |
| { |
| return Jimfs.newFileSystem(name, jimfsConfig()); |
| } |
| |
| private static Configuration jimfsConfig() |
| { |
| return Configuration.unix().toBuilder() |
| .setMaxSize(4L << 30).setBlockSize(512) |
| .build(); |
| } |
| |
| public static File maybeCreateTmp() |
| { |
| File dir = new File(StandardSystemProperty.JAVA_IO_TMPDIR.value()); |
| if (!dir.exists()) |
| dir.tryCreateDirectories(); |
| return dir; |
| } |
| } |