SONAR-4748 Introduce a new extension for managing temp files/folders.

plugins/sonar-core-plugin/src/test/java/org/sonar/plugins/core/issue/InitialOpenIssuesStackTest.java

@@ -20,24 +20,45 @@
 
 package org.sonar.plugins.core.issue;
 
+import edu.emory.mathcs.backport.java.util.Collections;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.sonar.api.CoreProperties;
+import org.sonar.batch.bootstrap.BatchTempUtils;
+import org.sonar.batch.bootstrap.BootstrapProperties;
+import org.sonar.batch.bootstrap.BootstrapSettings;
 import org.sonar.batch.index.Caches;
 import org.sonar.core.issue.db.IssueDto;
 
+import java.io.IOException;
 import java.util.List;
 
-import static com.google.common.collect.Lists.newArrayList;
 import static org.fest.assertions.Assertions.assertThat;
 
 public class InitialOpenIssuesStackTest {
 
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
+
+  public static Caches createCacheOnTemp(TemporaryFolder temp) {
+    BootstrapSettings bootstrapSettings = new BootstrapSettings(new BootstrapProperties(Collections.emptyMap()));
+    try {
+      bootstrapSettings.properties().put(CoreProperties.WORKING_DIRECTORY, temp.newFolder().getAbsolutePath());
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+    return new Caches(new BatchTempUtils(bootstrapSettings));
+  }
+
   InitialOpenIssuesStack stack;
-  Caches caches = new Caches();
+  Caches caches;
 
   @Before
-  public void setUp() {
+  public void setUp() throws Exception {
+    caches = createCacheOnTemp(temp);
     caches.start();
     stack = new InitialOpenIssuesStack(caches);
   }

sonar-batch/src/main/java/org/sonar/batch/bootstrap/BatchPluginRepository.java

@@ -30,6 +30,7 @@ import org.sonar.api.Plugin;
 import org.sonar.api.config.Settings;
 import org.sonar.api.platform.PluginMetadata;
 import org.sonar.api.platform.PluginRepository;
+import org.sonar.api.utils.TempUtils;
 import org.sonar.core.plugins.PluginClassloaders;
 import org.sonar.core.plugins.PluginInstaller;
 import org.sonar.core.plugins.RemotePlugin;
@@ -53,12 +54,12 @@ public class BatchPluginRepository implements PluginRepository {
   private Map<String, PluginMetadata> metadataByKey;
   private Settings settings;
   private PluginClassloaders classLoaders;
-  private TempDirectories workingDirectories;
+  private TempUtils tempDirectories;
   private final AnalysisMode analysisMode;
 
-  public BatchPluginRepository(PluginDownloader pluginDownloader, TempDirectories workingDirectories, Settings settings, AnalysisMode analysisMode) {
+  public BatchPluginRepository(PluginDownloader pluginDownloader, TempUtils tempDirectories, Settings settings, AnalysisMode analysisMode) {
     this.pluginDownloader = pluginDownloader;
-    this.workingDirectories = workingDirectories;
+    this.tempDirectories = tempDirectories;
     this.settings = settings;
     this.analysisMode = analysisMode;
   }
@@ -76,7 +77,7 @@ public class BatchPluginRepository implements PluginRepository {
       if (filter.accepts(remote.getKey())) {
         List<File> pluginFiles = pluginDownloader.downloadPlugin(remote);
         List<File> extensionFiles = pluginFiles.subList(1, pluginFiles.size());
-        File targetDir = workingDirectories.getDir("plugins/" + remote.getKey());
+        File targetDir = tempDirectories.createDirectory("plugins/" + remote.getKey());
         LOG.debug("Installing plugin {} into {}", remote.getKey(), targetDir.getAbsolutePath());
         PluginMetadata metadata = extractor.install(pluginFiles.get(0), remote.isCore(), extensionFiles, targetDir);
         if (StringUtils.isBlank(metadata.getBasePlugin()) || filter.accepts(metadata.getBasePlugin())) {

sonar-batch/src/main/java/org/sonar/batch/bootstrap/BatchTempUtils.java

@@ -0,0 +1,43 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.batch.bootstrap;
+
+import org.apache.commons.io.FileUtils;
+import org.sonar.api.CoreProperties;
+import org.sonar.core.utils.AbstractTempUtils;
+
+import java.io.File;
+import java.io.IOException;
+
+public class BatchTempUtils extends AbstractTempUtils {
+
+  public BatchTempUtils(BootstrapSettings bootstrapSettings) {
+    String workingDirPath = bootstrapSettings.property(CoreProperties.WORKING_DIRECTORY, CoreProperties.WORKING_DIRECTORY_DEFAULT_VALUE);
+    File workingDir = new File(workingDirPath);
+    File tempDir = new File(workingDir, "tmp");
+    try {
+      FileUtils.forceMkdir(tempDir);
+    } catch (IOException e) {
+      throw new IllegalStateException("Unable to create root temp directory " + tempDir, e);
+    }
+    setTempDir(tempDir);
+  }
+
+}

sonar-batch/src/main/java/org/sonar/batch/bootstrap/BootstrapContainer.java

@@ -87,7 +87,7 @@ public class BootstrapContainer extends ComponentContainer {
       Logback.class,
       ServerMetadata.class,
       org.sonar.batch.ServerMetadata.class,
-      TempDirectories.class,
+      BatchTempUtils.class,
       HttpDownloader.class,
       UriReader.class,
       new FileCacheProvider());

sonar-batch/src/main/java/org/sonar/batch/bootstrap/PreviewDatabase.java

@@ -30,6 +30,7 @@ import org.sonar.api.config.Settings;
 import org.sonar.api.database.DatabaseProperties;
 import org.sonar.api.utils.HttpDownloader.HttpException;
 import org.sonar.api.utils.SonarException;
+import org.sonar.api.utils.TempUtils;
 
 import java.io.File;
 import java.net.SocketTimeoutException;
@@ -50,19 +51,19 @@ public class PreviewDatabase implements BatchComponent {
 
   private final Settings settings;
   private final ServerClient server;
-  private final TempDirectories tempDirectories;
+  private final TempUtils tempUtils;
   private final AnalysisMode mode;
 
-  public PreviewDatabase(Settings settings, ServerClient server, TempDirectories tempDirectories, AnalysisMode mode) {
+  public PreviewDatabase(Settings settings, ServerClient server, TempUtils tempUtils, AnalysisMode mode) {
     this.settings = settings;
     this.server = server;
-    this.tempDirectories = tempDirectories;
+    this.tempUtils = tempUtils;
     this.mode = mode;
   }
 
   public void start() {
     if (mode.isPreview()) {
-      File databaseFile = tempDirectories.getFile("", "preview.h2.db");
+      File databaseFile = tempUtils.createTempFile("preview", ".h2.db");
 
       int readTimeoutSec = getReadTimeout();
       downloadDatabase(databaseFile, readTimeoutSec * 1000);

sonar-batch/src/main/java/org/sonar/batch/bootstrap/TempDirectories.java

@@ -1,104 +0,0 @@
-/*
- * SonarQube, open source software quality management tool.
- * Copyright (C) 2008-2013 SonarSource
- * mailto:contact AT sonarsource DOT com
- *
- * SonarQube is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * SonarQube is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- */
-package org.sonar.batch.bootstrap;
-
-import com.google.common.collect.Maps;
-import org.apache.commons.io.FileUtils;
-import org.apache.commons.io.filefilter.AgeFileFilter;
-import org.apache.commons.io.filefilter.AndFileFilter;
-import org.apache.commons.io.filefilter.DirectoryFileFilter;
-import org.apache.commons.io.filefilter.PrefixFileFilter;
-import org.apache.commons.lang.StringUtils;
-import org.slf4j.LoggerFactory;
-import org.sonar.api.utils.SonarException;
-import org.sonar.api.utils.TempFileUtils;
-
-import java.io.File;
-import java.io.FileFilter;
-import java.io.IOException;
-import java.util.Arrays;
-import java.util.Map;
-
-public class TempDirectories {
-
-  public static final String DIR_PREFIX = "sonar-batch";
-
-  // this timeout must be greater than the longest analysis
-  public static final int AGE_BEFORE_DELETION = 24 * 60 * 60 * 1000;
-
-  private File rootDir;
-  private Map<String, File> directoriesByKey = Maps.newHashMap();
-
-  public TempDirectories() throws IOException {
-    this.rootDir = TempFileUtils.createTempDirectory(DIR_PREFIX);
-    LoggerFactory.getLogger(getClass()).debug("Temporary directory: " + rootDir.getAbsolutePath());
-  }
-
-  public File getRoot() {
-    return rootDir;
-  }
-
-  /**
-   * Get or create a working directory
-   */
-  public File getDir(String key) {
-    if (StringUtils.isBlank(key)) {
-      return rootDir;
-    }
-
-    File dir = directoriesByKey.get(key);
-    if (dir == null) {
-      dir = new File(rootDir, key);
-      try {
-        FileUtils.forceMkdir(dir);
-        directoriesByKey.put(key, dir);
-
-      } catch (IOException e) {
-        throw new SonarException("Can not create the temp directory: " + dir, e);
-      }
-    }
-    return dir;
-  }
-
-  public File getFile(String directoryKey, String filename) {
-    File dir = getDir(directoryKey);
-    return new File(dir, filename);
-  }
-
-  /**
-   * This method is executed by picocontainer during shutdown.
-   */
-  public void stop() {
-    directoriesByKey.clear();
-
-    // Deleting temp directory does not work on MS Windows and Sun JVM because URLClassLoader locks JARs and resources.
-    // The workaround is that sonar deletes orphans itself.
-
-    // older than AGE_BEFORE_DELETION to be sure that the current dir is deleted on mac and linux.
-    rootDir.setLastModified(System.currentTimeMillis() - AGE_BEFORE_DELETION - 60 * 60 * 1000);
-
-    File[] directoriesToDelete = rootDir.getParentFile().listFiles((FileFilter) new AndFileFilter(Arrays.asList(
-        DirectoryFileFilter.DIRECTORY, new PrefixFileFilter(DIR_PREFIX), new AgeFileFilter(System.currentTimeMillis() - AGE_BEFORE_DELETION))));
-    for (File dir : directoriesToDelete) {
-      LoggerFactory.getLogger(getClass()).debug("Delete temporary directory: " + dir);
-      FileUtils.deleteQuietly(dir);
-    }
-  }
-}

sonar-batch/src/main/java/org/sonar/batch/index/Caches.java

@@ -21,7 +21,6 @@ package org.sonar.batch.index;
 
 import com.google.common.base.Preconditions;
 import com.google.common.collect.Sets;
-import com.google.common.io.Files;
 import com.persistit.Exchange;
 import com.persistit.Persistit;
 import com.persistit.Volume;
@@ -31,6 +30,7 @@ import org.apache.commons.io.FileUtils;
 import org.picocontainer.Startable;
 import org.slf4j.LoggerFactory;
 import org.sonar.api.BatchComponent;
+import org.sonar.api.utils.TempUtils;
 
 import java.io.File;
 import java.io.Serializable;
@@ -48,14 +48,16 @@ public class Caches implements BatchComponent, Startable {
   private File tempDir;
   private Persistit persistit;
   private Volume volume;
+  private final TempUtils tempUtils;
 
-  public Caches() {
+  public Caches(TempUtils tempUtils) {
+    this.tempUtils = tempUtils;
     initPersistit();
   }
 
   private void initPersistit() {
     try {
-      tempDir = Files.createTempDir();
+      tempDir = tempUtils.createTempDirectory("caches");
       persistit = new Persistit();
       persistit.setPersistitLogger(new Slf4jAdapter(LoggerFactory.getLogger("PERSISTIT")));
       Properties props = new Properties();

sonar-batch/src/main/java/org/sonar/batch/scan/DefaultProjectBootstrapper.java

@@ -81,12 +81,6 @@ class DefaultProjectBootstrapper implements ProjectBootstrapper {
     PROPERTY_OLD_LIBRARIES, PROPERTY_LIBRARIES
     );
 
-  /**
-   * @since 1.4
-   */
-  private static final String PROPERTY_WORK_DIRECTORY = "sonar.working.directory";
-  private static final String DEF_VALUE_WORK_DIRECTORY = ".sonar";
-
   /**
    * Array of all mandatory properties required for a project without child.
    */
@@ -151,9 +145,9 @@ class DefaultProjectBootstrapper implements ProjectBootstrapper {
 
   @VisibleForTesting
   protected File initRootProjectWorkDir(File baseDir) {
-    String workDir = settings.property(PROPERTY_WORK_DIRECTORY);
+    String workDir = settings.property(CoreProperties.WORKING_DIRECTORY);
     if (StringUtils.isBlank(workDir)) {
-      return new File(baseDir, DEF_VALUE_WORK_DIRECTORY);
+      return new File(baseDir, CoreProperties.WORKING_DIRECTORY_DEFAULT_VALUE);
     }
 
     File customWorkDir = new File(workDir);

sonar-batch/src/main/java/org/sonar/batch/scan/filesystem/ModuleFileSystemInitializer.java

@@ -24,7 +24,7 @@ import org.apache.commons.io.FileUtils;
 import org.sonar.api.BatchComponent;
 import org.sonar.api.batch.bootstrap.ProjectDefinition;
 import org.sonar.api.scan.filesystem.PathResolver;
-import org.sonar.batch.bootstrap.TempDirectories;
+import org.sonar.api.utils.TempUtils;
 
 import java.io.File;
 import java.util.List;
@@ -41,19 +41,19 @@ public class ModuleFileSystemInitializer implements BatchComponent {
   private List<File> additionalSourceFiles;
   private List<File> additionalTestFiles;
 
-  public ModuleFileSystemInitializer(ProjectDefinition module, TempDirectories tempDirectories, PathResolver pathResolver) {
+  public ModuleFileSystemInitializer(ProjectDefinition module, TempUtils tempUtils, PathResolver pathResolver) {
     baseDir = module.getBaseDir();
     buildDir = module.getBuildDir();
-    initWorkingDir(module, tempDirectories);
+    initWorkingDir(module, tempUtils);
     initBinaryDirs(module, pathResolver);
     initSources(module, pathResolver);
     initTests(module, pathResolver);
   }
 
-  private void initWorkingDir(ProjectDefinition module, TempDirectories tempDirectories) {
+  private void initWorkingDir(ProjectDefinition module, TempUtils tempUtils) {
     workingDir = module.getWorkDir();
     if (workingDir == null) {
-      workingDir = tempDirectories.getDir("work");
+      workingDir = tempUtils.createTempDirectory("work");
     } else {
       try {
         FileUtils.forceMkdir(workingDir);

sonar-batch/src/test/java/org/sonar/batch/bootstrap/BatchPluginRepositoryTest.java

@@ -28,6 +28,7 @@ import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
 import org.sonar.api.CoreProperties;
 import org.sonar.api.config.Settings;
+import org.sonar.api.utils.TempUtils;
 import org.sonar.core.plugins.RemotePlugin;
 import org.sonar.core.plugins.RemotePluginFile;
 import org.sonar.test.TestUtils;
@@ -63,9 +64,9 @@ public class BatchPluginRepositoryTest {
 
   @Test
   public void shouldLoadPlugin() throws IOException {
-    TempDirectories tempDirs = mock(TempDirectories.class);
+    TempUtils tempDirs = mock(TempUtils.class);
     File toDir = temp.newFolder();
-    when(tempDirs.getDir("plugins/checkstyle")).thenReturn(toDir);
+    when(tempDirs.createDirectory("plugins/checkstyle")).thenReturn(toDir);
     RemotePlugin checkstyle = new RemotePlugin("checkstyle", true);
 
     PluginDownloader downloader = mock(PluginDownloader.class);
@@ -83,11 +84,11 @@ public class BatchPluginRepositoryTest {
 
   @Test
   public void shouldLoadPluginExtension() throws IOException {
-    TempDirectories tempDirs = mock(TempDirectories.class);
+    TempUtils tempDirs = mock(TempUtils.class);
     File toDir1 = temp.newFolder();
     File toDir2 = temp.newFolder();
-    when(tempDirs.getDir("plugins/checkstyle")).thenReturn(toDir1);
-    when(tempDirs.getDir("plugins/checkstyleextensions")).thenReturn(toDir2);
+    when(tempDirs.createDirectory("plugins/checkstyle")).thenReturn(toDir1);
+    when(tempDirs.createDirectory("plugins/checkstyleextensions")).thenReturn(toDir2);
     RemotePlugin checkstyle = new RemotePlugin("checkstyle", true);
     RemotePlugin checkstyleExt = new RemotePlugin("checkstyleextensions", false);
 
@@ -108,9 +109,9 @@ public class BatchPluginRepositoryTest {
 
   @Test
   public void shouldLoadPluginDeprecatedExtensions() throws IOException {
-    TempDirectories tempDirs = mock(TempDirectories.class);
+    TempUtils tempDirs = mock(TempUtils.class);
     File toDir = temp.newFolder();
-    when(tempDirs.getDir("plugins/checkstyle")).thenReturn(toDir);
+    when(tempDirs.createDirectory("plugins/checkstyle")).thenReturn(toDir);
     RemotePlugin checkstyle = new RemotePlugin("checkstyle", true);
     checkstyle.getFiles().add(new RemotePluginFile("checkstyle-ext.xml", "fakemd5"));
 
@@ -130,11 +131,11 @@ public class BatchPluginRepositoryTest {
 
   @Test
   public void shouldExcludePluginAndItsExtensions() throws IOException {
-    TempDirectories tempDirs = mock(TempDirectories.class);
+    BatchTempUtils tempDirs = mock(BatchTempUtils.class);
     File toDir1 = temp.newFolder();
     File toDir2 = temp.newFolder();
-    when(tempDirs.getDir("plugins/checkstyle")).thenReturn(toDir1);
-    when(tempDirs.getDir("plugins/checkstyleextensions")).thenReturn(toDir2);
+    when(tempDirs.createDirectory("plugins/checkstyle")).thenReturn(toDir1);
+    when(tempDirs.createDirectory("plugins/checkstyleextensions")).thenReturn(toDir2);
     RemotePlugin checkstyle = new RemotePlugin("checkstyle", true);
     RemotePlugin checkstyleExt = new RemotePlugin("checkstyleextensions", false);
 

sonar-batch/src/test/java/org/sonar/batch/bootstrap/BatchTempUtilsTest.java

@@ -0,0 +1,54 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.batch.bootstrap;
+
+import com.google.common.collect.ImmutableMap;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.rules.TemporaryFolder;
+import org.sonar.api.CoreProperties;
+
+import java.io.File;
+
+import static org.fest.assertions.Assertions.assertThat;
+
+public class BatchTempUtilsTest {
+
+  @Rule
+  public ExpectedException throwable = ExpectedException.none();
+
+  @Rule
+  public TemporaryFolder temp = new TemporaryFolder();
+
+  @Test
+  public void createTempFolder() throws Exception {
+    File workingDir = temp.newFolder();
+    BatchTempUtils tempUtils = new BatchTempUtils(new BootstrapSettings(
+      new BootstrapProperties(ImmutableMap.of(CoreProperties.WORKING_DIRECTORY, workingDir.getAbsolutePath()))));
+    tempUtils.createTempDirectory();
+    tempUtils.createTempFile();
+    assertThat(new File(workingDir, "tmp")).exists();
+    assertThat(new File(workingDir, "tmp").list()).hasSize(2);
+
+    tempUtils.stop();
+    assertThat(new File(workingDir, "tmp")).doesNotExist();
+  }
+}

sonar-batch/src/test/java/org/sonar/batch/bootstrap/BootstrapContainerTest.java

@@ -42,10 +42,11 @@ public class BootstrapContainerTest {
   @Test
   public void should_add_components() {
     BootstrapContainer container = BootstrapContainer.create(Collections.emptyList());
+    container.add(new BootstrapProperties(Collections.<String, String>emptyMap()));
     container.doBeforeStart();
 
     assertThat(container.getComponentByType(Logback.class)).isNotNull();
-    assertThat(container.getComponentByType(TempDirectories.class)).isNotNull();
+    assertThat(container.getComponentByType(BatchTempUtils.class)).isNotNull();
   }
 
   @Test
@@ -62,11 +63,11 @@ public class BootstrapContainerTest {
     PluginMetadata metadata = mock(PluginMetadata.class);
     FakePlugin plugin = new FakePlugin();
     BatchPluginRepository pluginRepository = mock(BatchPluginRepository.class);
-    when(pluginRepository.getPluginsByMetadata()).thenReturn(ImmutableMap.<PluginMetadata, Plugin> of(
-        metadata, plugin
-        ));
+    when(pluginRepository.getPluginsByMetadata()).thenReturn(ImmutableMap.<PluginMetadata, Plugin>of(
+      metadata, plugin
+      ));
 
-    BootstrapContainer container = spy(BootstrapContainer.create(Lists.<Object> newArrayList(pluginRepository)));
+    BootstrapContainer container = spy(BootstrapContainer.create(Lists.<Object>newArrayList(pluginRepository)));
     doNothing().when(container).executeTask();
     container.doAfterStart();
 

sonar-batch/src/test/java/org/sonar/batch/bootstrap/PreviewDatabaseTest.java

@@ -30,6 +30,7 @@ import org.sonar.api.config.Settings;
 import org.sonar.api.database.DatabaseProperties;
 import org.sonar.api.utils.HttpDownloader;
 import org.sonar.api.utils.SonarException;
+import org.sonar.api.utils.TempUtils;
 
 import java.io.File;
 import java.net.SocketTimeoutException;
@@ -44,7 +45,7 @@ import static org.mockito.Mockito.when;
 public class PreviewDatabaseTest {
   Settings settings;
   ServerClient server = mock(ServerClient.class);
-  TempDirectories tempDirectories = mock(TempDirectories.class);
+  TempUtils tempUtils = mock(TempUtils.class);
   File databaseFile;
   private AnalysisMode mode;
 
@@ -57,7 +58,7 @@ public class PreviewDatabaseTest {
   @Before
   public void setUp() throws Exception {
     databaseFile = temp.newFile("preview.h2.db");
-    when(tempDirectories.getFile("", "preview.h2.db")).thenReturn(databaseFile);
+    when(tempUtils.createTempFile("preview", ".h2.db")).thenReturn(databaseFile);
     settings = new Settings();
     settings.setProperty(CoreProperties.PROJECT_KEY_PROPERTY, "group:project");
 
@@ -68,14 +69,14 @@ public class PreviewDatabaseTest {
   @Test
   public void should_be_disabled_if_not_preview() {
     when(mode.isPreview()).thenReturn(false);
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
 
-    verifyZeroInteractions(tempDirectories, server);
+    verifyZeroInteractions(tempUtils, server);
   }
 
   @Test
   public void should_download_database() {
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
 
     verify(server).download("/batch_bootstrap/db?project=group:project", databaseFile, 60000);
   }
@@ -83,7 +84,7 @@ public class PreviewDatabaseTest {
   @Test
   public void should_download_database_with_deprecated_overriden_timeout() {
     settings.setProperty(CoreProperties.DRY_RUN_READ_TIMEOUT_SEC, 80);
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
 
     verify(server).download("/batch_bootstrap/db?project=group:project", databaseFile, 80000);
   }
@@ -91,7 +92,7 @@ public class PreviewDatabaseTest {
   @Test
   public void should_download_database_with_overriden_timeout() {
     settings.setProperty(CoreProperties.PREVIEW_READ_TIMEOUT_SEC, 80);
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
 
     verify(server).download("/batch_bootstrap/db?project=group:project", databaseFile, 80000);
   }
@@ -99,14 +100,14 @@ public class PreviewDatabaseTest {
   @Test
   public void should_download_database_on_branch() {
     settings.setProperty(CoreProperties.PROJECT_BRANCH_PROPERTY, "mybranch");
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
 
     verify(server).download("/batch_bootstrap/db?project=group:project:mybranch", databaseFile, 60000);
   }
 
   @Test
   public void should_replace_database_settings() {
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
 
     assertThat(settings.getString(DatabaseProperties.PROP_DIALECT)).isEqualTo("h2");
     assertThat(settings.getString(DatabaseProperties.PROP_DRIVER)).isEqualTo("org.h2.Driver");
@@ -122,7 +123,7 @@ public class PreviewDatabaseTest {
     thrown.expect(SonarException.class);
     thrown.expectMessage("You don't have access rights to project [group:project]");
 
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
   }
 
   @Test
@@ -132,7 +133,7 @@ public class PreviewDatabaseTest {
     thrown.expect(SonarException.class);
     thrown.expectMessage("Preview database read timed out after 60000 ms. You can try to increase read timeout with property -Dsonar.preview.readTimeout (in seconds)");
 
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
   }
 
   @Test
@@ -142,14 +143,14 @@ public class PreviewDatabaseTest {
     thrown.expect(SonarException.class);
     thrown.expectMessage("BUG");
 
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
   }
 
   @Test
   public void project_should_be_optional() {
     // on non-scan tasks
     settings.removeProperty(CoreProperties.PROJECT_KEY_PROPERTY);
-    new PreviewDatabase(settings, server, tempDirectories, mode).start();
+    new PreviewDatabase(settings, server, tempUtils, mode).start();
     verify(server).download("/batch_bootstrap/db", databaseFile, 60000);
   }
 }

sonar-batch/src/test/java/org/sonar/batch/bootstrap/TempDirectoriesTest.java

@@ -1,82 +0,0 @@
-/*
- * SonarQube, open source software quality management tool.
- * Copyright (C) 2008-2013 SonarSource
- * mailto:contact AT sonarsource DOT com
- *
- * SonarQube is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 3 of the License, or (at your option) any later version.
- *
- * SonarQube is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- */
-package org.sonar.batch.bootstrap;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
-import java.io.File;
-import java.io.IOException;
-
-import static org.fest.assertions.Assertions.assertThat;
-
-public class TempDirectoriesTest {
-
-  private TempDirectories tempDirectories;
-
-  @Before
-  public void before() throws IOException {
-    tempDirectories = new TempDirectories();
-  }
-
-  @After
-  public void after() {
-    if (tempDirectories != null) {
-      tempDirectories.stop();
-    }
-  }
-
-  @Test
-  public void shouldCreateRoot() {
-    assertThat(tempDirectories.getRoot()).isNotNull();
-    assertThat(tempDirectories.getRoot()).exists();
-    assertThat(tempDirectories.getRoot()).isDirectory();
-    assertThat(tempDirectories.getDir("")).isEqualTo(tempDirectories.getRoot());
-  }
-
-  @Test
-  public void shouldCreateDirectory() {
-    File findbugsDir = tempDirectories.getDir("findbugs");
-    assertThat(findbugsDir).isNotNull();
-    assertThat(findbugsDir).exists();
-    assertThat(findbugsDir.getParentFile()).isEqualTo(tempDirectories.getRoot());
-    assertThat(findbugsDir.getName()).isEqualTo("findbugs");
-  }
-
-  @Test
-  public void shouldStopAndDeleteDirectory() {
-    File root = tempDirectories.getRoot();
-    File findbugsDir = tempDirectories.getDir("findbugs");
-    assertThat(findbugsDir).exists();
-
-    tempDirectories.stop();
-
-    assertThat(root).doesNotExist();
-    assertThat(findbugsDir).doesNotExist();
-  }
-
-  @Test
-  public void shouldCreateDirectoryWhenGettingFile() {
-    File file = tempDirectories.getFile("findbugs", "bcel.jar");
-    assertThat(file).isNotNull();
-    assertThat(file.getParentFile().getName()).isEqualTo("findbugs");
-  }
-}

sonar-batch/src/test/java/org/sonar/batch/index/CacheTest.java

@@ -23,15 +23,22 @@ import com.google.common.collect.Iterables;
 import com.persistit.exception.PersistitException;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import static org.fest.assertions.Assertions.assertThat;
 
 public class CacheTest {
-  Caches caches = new Caches();
+
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
+
+  Caches caches;
 
   @Before
-  public void start() {
+  public void start() throws Exception {
+    caches = CachesTest.createCacheOnTemp(temp);
     caches.start();
   }
 

sonar-batch/src/test/java/org/sonar/batch/index/CachesTest.java

@@ -19,17 +19,45 @@
  */
 package org.sonar.batch.index;
 
+import edu.emory.mathcs.backport.java.util.Collections;
 import org.junit.After;
+import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.sonar.api.CoreProperties;
+import org.sonar.batch.bootstrap.BatchTempUtils;
+import org.sonar.batch.bootstrap.BootstrapProperties;
+import org.sonar.batch.bootstrap.BootstrapSettings;
 
 import java.io.File;
+import java.io.IOException;
 import java.io.Serializable;
 
 import static org.fest.assertions.Assertions.assertThat;
 import static org.fest.assertions.Fail.fail;
 
 public class CachesTest {
-  Caches caches = new Caches();
+
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
+
+  public static Caches createCacheOnTemp(TemporaryFolder temp) {
+    BootstrapSettings bootstrapSettings = new BootstrapSettings(new BootstrapProperties(Collections.emptyMap()));
+    try {
+      bootstrapSettings.properties().put(CoreProperties.WORKING_DIRECTORY, temp.newFolder().getAbsolutePath());
+    } catch (IOException e) {
+      throw new RuntimeException(e);
+    }
+    return new Caches(new BatchTempUtils(bootstrapSettings));
+  }
+
+  Caches caches;
+
+  @Before
+  public void prepare() throws Exception {
+    caches = createCacheOnTemp(temp);
+  }
 
   @After
   public void stop() {

sonar-batch/src/test/java/org/sonar/batch/index/ComponentDataCacheTest.java

@@ -21,16 +21,22 @@ package org.sonar.batch.index;
 
 import org.junit.After;
 import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 
 import static org.fest.assertions.Assertions.assertThat;
 
 public class ComponentDataCacheTest {
 
-  Caches caches = new Caches();
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
+
+  Caches caches;
 
   @Before
-  public void start() {
+  public void start() throws Exception {
+    caches = CachesTest.createCacheOnTemp(temp);
     caches.start();
   }
 

sonar-batch/src/test/java/org/sonar/batch/index/ComponentDataPersisterTest.java

@@ -21,19 +21,25 @@ package org.sonar.batch.index;
 
 import org.junit.After;
 import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 import org.sonar.api.database.model.Snapshot;
 import org.sonar.core.persistence.AbstractDaoTestCase;
 import org.sonar.core.source.jdbc.SnapshotDataDao;
 
 public class ComponentDataPersisterTest extends AbstractDaoTestCase {
 
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
+
   SnapshotCache snapshots = new SnapshotCache();
   ComponentDataCache data;
-  Caches caches = new Caches();
+  Caches caches;
 
   @Before
-  public void start() {
+  public void start() throws Exception {
+    caches = CachesTest.createCacheOnTemp(temp);
     caches.start();
   }
 
@@ -59,6 +65,6 @@ public class ComponentDataPersisterTest extends AbstractDaoTestCase {
     ComponentDataPersister persister = new ComponentDataPersister(data, snapshots, dataDao, getMyBatis());
     persister.persist();
 
-    checkTables("should_persist_component_data", new String[]{"id", "created_at", "updated_at"}, "snapshot_data");
+    checkTables("should_persist_component_data", new String[] {"id", "created_at", "updated_at"}, "snapshot_data");
   }
 }

sonar-batch/src/test/java/org/sonar/batch/issue/IssueCacheTest.java

@@ -24,11 +24,14 @@ import com.google.common.collect.Collections2;
 import com.google.common.collect.ImmutableList;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.ClassRule;
 import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
 import org.sonar.api.issue.Issue;
 import org.sonar.api.issue.internal.DefaultIssue;
 import org.sonar.api.rule.Severity;
 import org.sonar.batch.index.Caches;
+import org.sonar.batch.index.CachesTest;
 
 import javax.annotation.Nullable;
 
@@ -39,10 +42,14 @@ import static org.fest.assertions.Assertions.assertThat;
 
 public class IssueCacheTest {
 
-  Caches caches = new Caches();
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
+
+  Caches caches;
 
   @Before
-  public void start() {
+  public void start() throws Exception {
+    caches = CachesTest.createCacheOnTemp(temp);
     caches.start();
   }
 

sonar-batch/src/test/java/org/sonar/batch/scan/filesystem/InputFileCacheTest.java

@@ -28,6 +28,7 @@ import org.junit.rules.TemporaryFolder;
 import org.sonar.api.scan.filesystem.InputFile;
 import org.sonar.api.scan.filesystem.internal.DefaultInputFile;
 import org.sonar.batch.index.Caches;
+import org.sonar.batch.index.CachesTest;
 
 import static org.fest.assertions.Assertions.assertThat;
 
@@ -36,10 +37,11 @@ public class InputFileCacheTest {
   @Rule
   public TemporaryFolder temp = new TemporaryFolder();
 
-  Caches caches = new Caches();
+  Caches caches;
 
   @Before
-  public void start() {
+  public void start() throws Exception {
+    caches = CachesTest.createCacheOnTemp(temp);
     caches.start();
   }
 

sonar-batch/src/test/java/org/sonar/batch/scan/filesystem/ModuleFileSystemInitializerTest.java

@@ -21,22 +21,23 @@ package org.sonar.batch.scan.filesystem;
 
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.FilenameUtils;
-import org.junit.Rule;
+import org.junit.ClassRule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
 import org.sonar.api.batch.bootstrap.ProjectDefinition;
 import org.sonar.api.scan.filesystem.PathResolver;
-import org.sonar.batch.bootstrap.TempDirectories;
+import org.sonar.api.utils.TempUtils;
 
 import java.io.File;
 import java.io.IOException;
 
 import static org.fest.assertions.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
 
 public class ModuleFileSystemInitializerTest {
 
-  @Rule
-  public TemporaryFolder temp = new TemporaryFolder();
+  @ClassRule
+  public static TemporaryFolder temp = new TemporaryFolder();
 
   PathResolver pathResolver = new PathResolver();
 
@@ -46,7 +47,7 @@ public class ModuleFileSystemInitializerTest {
     File workDir = temp.newFolder("work");
     ProjectDefinition module = ProjectDefinition.create().setBaseDir(baseDir).setWorkDir(workDir);
 
-    ModuleFileSystemInitializer initializer = new ModuleFileSystemInitializer(module, new TempDirectories(), pathResolver);
+    ModuleFileSystemInitializer initializer = new ModuleFileSystemInitializer(module, mock(TempUtils.class), pathResolver);
 
     assertThat(initializer.baseDir().getCanonicalPath()).isEqualTo(baseDir.getCanonicalPath());
     assertThat(initializer.workingDir().getCanonicalPath()).isEqualTo(workDir.getCanonicalPath());
@@ -72,7 +73,7 @@ public class ModuleFileSystemInitializerTest {
       .addTestDirs("src/test/java", "src/test/unknown")
       .addBinaryDir("target/classes");
 
-    ModuleFileSystemInitializer initializer = new ModuleFileSystemInitializer(project, new TempDirectories(), pathResolver);
+    ModuleFileSystemInitializer initializer = new ModuleFileSystemInitializer(project, mock(TempUtils.class), pathResolver);
 
     assertThat(initializer.baseDir().getCanonicalPath()).isEqualTo(baseDir.getCanonicalPath());
     assertThat(initializer.buildDir().getCanonicalPath()).isEqualTo(buildDir.getCanonicalPath());

sonar-core/src/main/java/org/sonar/core/utils/AbstractTempUtils.java

@@ -0,0 +1,121 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.core.utils;
+
+import org.apache.commons.io.FileUtils;
+import org.picocontainer.Startable;
+import org.sonar.api.utils.TempUtils;
+
+import javax.annotation.Nullable;
+
+import java.io.File;
+import java.io.IOException;
+
+public abstract class AbstractTempUtils implements TempUtils, Startable {
+
+  /** Maximum loop count when creating temp directories. */
+  private static final int TEMP_DIR_ATTEMPTS = 10000;
+
+  private File tempDir;
+
+  protected void setTempDir(File tempDir) {
+    this.tempDir = tempDir;
+  }
+
+  @Override
+  public File createTempDirectory() {
+    return createTempDirectory(null);
+  }
+
+  @Override
+  public File createTempDirectory(@Nullable String prefix) {
+    return createTempDir(tempDir, prefix);
+  }
+
+  /**
+   * Copied from guava waiting for JDK 7 Files#createTempDirectory
+   */
+  private static File createTempDir(File baseDir, String prefix) {
+    String baseName = prefix + System.currentTimeMillis() + "-";
+
+    for (int counter = 0; counter < TEMP_DIR_ATTEMPTS; counter++) {
+      File tempDir = new File(baseDir, baseName + counter);
+      if (tempDir.mkdir()) {
+        return tempDir;
+      }
+    }
+    throw new IllegalStateException("Failed to create directory within "
+      + TEMP_DIR_ATTEMPTS + " attempts (tried "
+      + baseName + "0 to " + baseName + (TEMP_DIR_ATTEMPTS - 1) + ')');
+  }
+
+  @Override
+  public File createDirectory(String name) {
+    File dir = new File(tempDir, name);
+    try {
+      FileUtils.forceMkdir(dir);
+    } catch (IOException e) {
+      throw new IllegalStateException("Unable to create temp directory in " + dir, e);
+    }
+    return dir;
+  }
+
+  @Override
+  public File createTempFile() {
+    return createTempFile(null, null);
+  }
+
+  @Override
+  public File createTempFile(@Nullable String prefix, @Nullable String suffix) {
+    return createTempFile(tempDir, prefix, suffix);
+  }
+
+  /**
+   * Inspired by guava waiting for JDK 7 Files#createTempFile
+   */
+  private static File createTempFile(File baseDir, String prefix, String suffix) {
+    String baseName = prefix + System.currentTimeMillis() + "-";
+
+    try {
+      for (int counter = 0; counter < TEMP_DIR_ATTEMPTS; counter++) {
+        File tempFile = new File(baseDir, baseName + counter + suffix);
+        if (tempFile.createNewFile()) {
+          return tempFile;
+        }
+      }
+    } catch (IOException e) {
+      throw new IllegalStateException("Failed to create temp file", e);
+    }
+    throw new IllegalStateException("Failed to create temp file within "
+      + TEMP_DIR_ATTEMPTS + " attempts (tried "
+      + baseName + "0" + suffix + " to " + baseName + (TEMP_DIR_ATTEMPTS - 1) + suffix + ")");
+  }
+
+  @Override
+  public void start() {
+    // Nothing to do
+  }
+
+  @Override
+  public void stop() {
+    FileUtils.deleteQuietly(tempDir);
+  }
+
+}

sonar-core/src/test/java/org/sonar/core/utils/AbstractTempUtilsTest.java

@@ -0,0 +1,71 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.core.utils;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+
+import static org.fest.assertions.Assertions.assertThat;
+
+public class AbstractTempUtilsTest {
+
+  @Rule
+  public ExpectedException throwable = ExpectedException.none();
+
+  @Rule
+  public TemporaryFolder temp = new TemporaryFolder();
+
+  @Test
+  public void createTempFolderAndFile() throws Exception {
+    File tempFolder = temp.newFolder();
+    AbstractTempUtils tempUtils = new CustomTempUtils(tempFolder);
+    File dir = tempUtils.createTempDirectory();
+    assertThat(dir).exists().isDirectory();
+    File file = tempUtils.createTempFile();
+    assertThat(file).exists().isFile();
+
+    tempUtils.stop();
+    assertThat(tempFolder).doesNotExist();
+  }
+
+  @Test
+  public void createTempFolderWithName() throws Exception {
+    File tempFolder = temp.newFolder();
+    AbstractTempUtils tempUtils = new CustomTempUtils(tempFolder);
+    File dir = tempUtils.createDirectory("sample");
+    assertThat(dir).exists().isDirectory();
+    assertThat(new File(tempFolder, "sample")).isEqualTo(dir);
+
+    tempUtils.stop();
+    assertThat(tempFolder).doesNotExist();
+  }
+
+  private static class CustomTempUtils extends AbstractTempUtils {
+
+    public CustomTempUtils(File tempDir) {
+      setTempDir(tempDir);
+    }
+
+  }
+}

sonar-plugin-api/src/main/java/org/sonar/api/CoreProperties.java

@@ -522,4 +522,10 @@ public interface CoreProperties {
    */
   String PREVIEW_EXCLUDE_PLUGINS = "sonar.preview.excludePlugins";
   String PREVIEW_EXCLUDE_PLUGINS_DEFAULT_VALUE = "devcockpit,pdfreport,report,scmactivity,views,jira";
+
+  /**
+   * @since 4.0
+   */
+  String WORKING_DIRECTORY = "sonar.working.directory";
+  String WORKING_DIRECTORY_DEFAULT_VALUE = ".sonar";
 }

sonar-plugin-api/src/main/java/org/sonar/api/utils/TempFileUtils.java

@@ -22,6 +22,10 @@ package org.sonar.api.utils;
 import java.io.File;
 import java.io.IOException;
 
+/**
+ * @deprecated since 4.0 use {@link TempUtils}
+ */
+@Deprecated
 public final class TempFileUtils {
 
   private TempFileUtils() {

sonar-plugin-api/src/main/java/org/sonar/api/utils/TempUtils.java

@@ -0,0 +1,60 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.api.utils;
+
+import org.sonar.api.ServerComponent;
+import org.sonar.api.task.TaskComponent;
+
+import javax.annotation.Nullable;
+
+import java.io.File;
+
+/**
+ * Use this component to deal with temp files/folders. Root location of temp files/folders
+ * depends on situation:
+ * <ul>
+ * <li>${SONAR_HOME}/temp on server side</li>
+ * <li>Working directory on batch side (see sonar.working.directory)</li>
+ * </ul>
+ * @since 4.0
+ *
+ */
+public interface TempUtils extends TaskComponent, ServerComponent {
+
+  /**
+   * Create a directory in temp folder with a random unique name.
+   */
+  File createTempDirectory();
+
+  /**
+   * Create a directory in temp folder with a random unique name and using the provided prefix when possible.
+   */
+  File createTempDirectory(@Nullable String prefix);
+
+  /**
+   * Create a directory in temp folder using provided name.
+   */
+  File createDirectory(String name);
+
+  File createTempFile();
+
+  File createTempFile(@Nullable String prefix, @Nullable String suffix);
+
+}

sonar-server/src/main/java/org/sonar/server/platform/Platform.java

@@ -148,6 +148,7 @@ import org.sonar.server.ui.SecurityRealmFactory;
 import org.sonar.server.ui.Views;
 import org.sonar.server.user.DefaultUserService;
 import org.sonar.server.user.NewUserNotifier;
+import org.sonar.server.util.ServerTempUtils;
 
 import javax.servlet.ServletContext;
 
@@ -239,6 +240,7 @@ public final class Platform {
     rootContainer.addSingleton(PreviewDatabaseFactory.class);
     rootContainer.addSingleton(SemaphoreUpdater.class);
     rootContainer.addSingleton(SemaphoresImpl.class);
+    rootContainer.addSingleton(ServerTempUtils.class);
     rootContainer.startComponents();
   }
 

sonar-server/src/main/java/org/sonar/server/util/ServerTempUtils.java

@@ -0,0 +1,41 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.server.util;
+
+import org.apache.commons.io.FileUtils;
+import org.sonar.api.platform.ServerFileSystem;
+import org.sonar.core.utils.AbstractTempUtils;
+
+import java.io.File;
+import java.io.IOException;
+
+public class ServerTempUtils extends AbstractTempUtils {
+
+  public ServerTempUtils(ServerFileSystem fs) {
+    File tempDir = new File(fs.getTempDir(), "tmp");
+    try {
+      FileUtils.forceMkdir(tempDir);
+    } catch (IOException e) {
+      throw new IllegalStateException("Unable to create root temp directory " + tempDir, e);
+    }
+    setTempDir(tempDir);
+  }
+
+}

sonar-server/src/test/java/org/sonar/server/util/ServerTempUtilsTest.java

@@ -0,0 +1,56 @@
+/*
+ * SonarQube, open source software quality management tool.
+ * Copyright (C) 2008-2013 SonarSource
+ * mailto:contact AT sonarsource DOT com
+ *
+ * SonarQube is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * SonarQube is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+package org.sonar.server.util;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+import org.junit.rules.TemporaryFolder;
+import org.sonar.api.platform.ServerFileSystem;
+
+import java.io.File;
+
+import static org.fest.assertions.Assertions.assertThat;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class ServerTempUtilsTest {
+
+  @Rule
+  public ExpectedException throwable = ExpectedException.none();
+
+  @Rule
+  public TemporaryFolder temp = new TemporaryFolder();
+
+  @Test
+  public void createTempFolder() throws Exception {
+    ServerFileSystem fs = mock(ServerFileSystem.class);
+    File serverTempFolder = temp.newFolder();
+    when(fs.getTempDir()).thenReturn(serverTempFolder);
+    ServerTempUtils tempUtils = new ServerTempUtils(fs);
+    tempUtils.createTempDirectory();
+    tempUtils.createTempFile();
+    assertThat(new File(serverTempFolder, "tmp")).exists();
+    assertThat(new File(serverTempFolder, "tmp").list()).hasSize(2);
+
+    tempUtils.stop();
+    assertThat(new File(serverTempFolder, "tmp")).doesNotExist();
+  }
+}