SONAR-9930 Noisy ERROR logs when failing to delete a temp directory that does not exist

2 files changed, 37 insertions, 5 deletions

diff --git a/sonar-plugin-api/src/main/java/org/sonar/api/utils/internal/DefaultTempFolder.java b/sonar-plugin-api/src/main/java/org/sonar/api/utils/internal/DefaultTempFolder.java
index a921452d83c..2ceed0b82e7 100644
--- a/sonar-plugin-api/src/main/java/org/sonar/api/utils/internal/DefaultTempFolder.java
+++ b/sonar-plugin-api/src/main/java/org/sonar/api/utils/internal/DefaultTempFolder.java
@@ -93,7 +93,9 @@ public class DefaultTempFolder implements TempFolder {
 
   public void clean() {
     try {
-      Files.walkFileTree(tempDir.toPath(), DeleteRecursivelyFileVisitor.INSTANCE);
+      if (tempDir.exists()) {
+        Files.walkFileTree(tempDir.toPath(), DeleteRecursivelyFileVisitor.INSTANCE);
+      }
     } catch (IOException e) {
       LOG.error("Failed to delete temp folder", e);
     }
@@ -110,13 +112,13 @@ public class DefaultTempFolder implements TempFolder {
 
     @Override
     public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-      Files.delete(file);
+      Files.deleteIfExists(file);
       return FileVisitResult.CONTINUE;
     }
 
     @Override
     public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
-      Files.delete(dir);
+      Files.deleteIfExists(dir);
       return FileVisitResult.CONTINUE;
     }
   }
diff --git a/sonar-plugin-api/src/test/java/org/sonar/api/utils/internal/DefaultTempFolderTest.java b/sonar-plugin-api/src/test/java/org/sonar/api/utils/internal/DefaultTempFolderTest.java
index 7ec43bda906..62ec60f1d49 100644
--- a/sonar-plugin-api/src/test/java/org/sonar/api/utils/internal/DefaultTempFolderTest.java
+++ b/sonar-plugin-api/src/test/java/org/sonar/api/utils/internal/DefaultTempFolderTest.java
@@ -19,12 +19,14 @@
  */
 package org.sonar.api.utils.internal;
 
+import java.io.File;
+import org.apache.commons.io.FileUtils;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.junit.rules.TemporaryFolder;
-
-import java.io.File;
+import org.sonar.api.utils.log.LogTester;
+import org.sonar.api.utils.log.LoggerLevel;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
@@ -36,6 +38,9 @@ public class DefaultTempFolderTest {
   @Rule
   public TemporaryFolder temp = new TemporaryFolder();
 
+  @Rule
+  public LogTester logTester = new LogTester();
+
   @Test
   public void createTempFolderAndFile() throws Exception {
     File rootTempFolder = temp.newFolder();
@@ -86,4 +91,29 @@ public class DefaultTempFolderTest {
     throwable.expectMessage("Failed to create temp file");
     tempFolder.newFile(tooLong, ".txt");
   }
+
+  @Test
+  public void clean_deletes_non_empty_directory() throws Exception {
+    File dir = temp.newFolder();
+    FileUtils.touch(new File(dir, "foo.txt"));
+
+    DefaultTempFolder underTest = new DefaultTempFolder(dir);
+    underTest.clean();
+
+    assertThat(dir).doesNotExist();
+  }
+
+  @Test
+  public void clean_does_not_fail_if_directory_has_already_been_deleted() throws Exception {
+    File dir = temp.newFolder();
+
+    DefaultTempFolder underTest = new DefaultTempFolder(dir);
+    underTest.clean();
+    assertThat(dir).doesNotExist();
+
+    // second call does not fail, nor log ERROR logs
+    underTest.clean();
+
+    assertThat(logTester.logs(LoggerLevel.ERROR)).isEmpty();
+  }
 }