| package org.apache.solr.util; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.io.*; |
| import java.nio.channels.FileChannel; |
| |
| /** |
| * |
| */ |
| public class FileUtils { |
| |
| /** |
| * Resolves a path relative a base directory. |
| * |
| * <p> |
| * This method does what "new File(base,path)" <b>Should</b> do, if it wasn't |
| * completely lame: If path is absolute, then a File for that path is returned; |
| * if it's not absolute, then a File is returned using "path" as a child |
| * of "base") |
| * </p> |
| */ |
| public static File resolvePath(File base, String path) { |
| File r = new File(path); |
| return r.isAbsolute() ? r : new File(base, path); |
| } |
| |
| public static void copyFile(File src , File destination) throws IOException { |
| FileChannel in = null; |
| FileChannel out = null; |
| try { |
| in = new FileInputStream(src).getChannel(); |
| out = new FileOutputStream(destination).getChannel(); |
| in.transferTo(0, in.size(), out); |
| } finally { |
| try { if (in != null) in.close(); } catch (IOException e) {} |
| try { if (out != null) out.close(); } catch (IOException e) {} |
| } |
| } |
| |
| /** |
| * Copied from Lucene's FSDirectory.fsync(String) |
| * |
| * @param fullFile the File to be synced to disk |
| * @throws IOException if the file could not be synced |
| */ |
| public static void sync(File fullFile) throws IOException { |
| if (fullFile == null || !fullFile.exists()) |
| throw new FileNotFoundException("File does not exist " + fullFile); |
| |
| boolean success = false; |
| int retryCount = 0; |
| IOException exc = null; |
| while(!success && retryCount < 5) { |
| retryCount++; |
| RandomAccessFile file = null; |
| try { |
| try { |
| file = new RandomAccessFile(fullFile, "rw"); |
| file.getFD().sync(); |
| success = true; |
| } finally { |
| if (file != null) |
| file.close(); |
| } |
| } catch (IOException ioe) { |
| if (exc == null) |
| exc = ioe; |
| try { |
| // Pause 5 msec |
| Thread.sleep(5); |
| } catch (InterruptedException ie) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| } |
| if (!success) |
| // Throw original exception |
| throw exc; |
| } |
| |
| } |