001 /*
002 * SonarQube, open source software quality management tool.
003 * Copyright (C) 2008-2014 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * SonarQube is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * SonarQube is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
019 */
020 package org.sonar.api.utils.internal;
021
022 import org.apache.commons.io.FileUtils;
023 import org.apache.commons.lang.StringUtils;
024 import org.sonar.api.utils.TempFolder;
025
026 import javax.annotation.Nullable;
027
028 import java.io.File;
029 import java.io.IOException;
030 import java.text.MessageFormat;
031
032 public class DefaultTempFolder implements TempFolder {
033
034 /** Maximum loop count when creating temp directories. */
035 private static final int TEMP_DIR_ATTEMPTS = 10000;
036
037 private final File tempDir;
038
039 public DefaultTempFolder(File tempDir) {
040 this.tempDir = tempDir;
041 }
042
043 @Override
044 public File newDir() {
045 return createTempDir(tempDir, "");
046 }
047
048 /**
049 * Copied from guava waiting for JDK 7 Files#createTempDirectory
050 */
051 private static File createTempDir(File baseDir, String prefix) {
052 String baseName = prefix + System.currentTimeMillis() + "-";
053
054 for (int counter = 0; counter < TEMP_DIR_ATTEMPTS; counter++) {
055 File tempDir = new File(baseDir, baseName + counter);
056 if (tempDir.mkdir()) {
057 return tempDir;
058 }
059 }
060 throw new IllegalStateException(MessageFormat.format("Failed to create directory within {0} attempts (tried {1} to {2})", TEMP_DIR_ATTEMPTS, baseName + 0, baseName
061 + (TEMP_DIR_ATTEMPTS - 1)));
062 }
063
064 @Override
065 public File newDir(String name) {
066 File dir = new File(tempDir, name);
067 try {
068 FileUtils.forceMkdir(dir);
069 } catch (IOException e) {
070 throw new IllegalStateException("Failed to create temp directory in " + dir, e);
071 }
072 return dir;
073 }
074
075 @Override
076 public File newFile() {
077 return newFile(null, null);
078 }
079
080 @Override
081 public File newFile(@Nullable String prefix, @Nullable String suffix) {
082 return createTempFile(tempDir, prefix, suffix);
083 }
084
085 /**
086 * Inspired by guava waiting for JDK 7 Files#createTempFile
087 */
088 private static File createTempFile(File baseDir, String prefix, String suffix) {
089 String baseName = StringUtils.defaultIfEmpty(prefix, "") + System.currentTimeMillis() + "-";
090
091 try {
092 for (int counter = 0; counter < TEMP_DIR_ATTEMPTS; counter++) {
093 File tempFile = new File(baseDir, baseName + counter + suffix);
094 if (tempFile.createNewFile()) {
095 return tempFile;
096 }
097 }
098 } catch (IOException e) {
099 throw new IllegalStateException("Failed to create temp file", e);
100 }
101 throw new IllegalStateException(MessageFormat.format("Failed to create temp file within {0} attempts (tried {1} to {2})", TEMP_DIR_ATTEMPTS, baseName + 0 + suffix, baseName
102 + (TEMP_DIR_ATTEMPTS - 1) + suffix));
103 }
104
105 public void clean() {
106 FileUtils.deleteQuietly(tempDir);
107 }
108
109 }