The XFS file system doesn't return size of the directory content

nucleus/common/common-util/src/main/java/com/sun/enterprise/util/io/FileUtils.java

@@ -40,6 +40,8 @@
 import java.nio.channels.WritableByteChannel;
 import java.nio.charset.Charset;
 import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
 import java.nio.file.StandardCopyOption;
 import java.util.Collection;
 import java.util.Locale;
@@ -743,7 +745,7 @@ public static File copyResource(String resourcePath, File outputFile) throws IOE
 
 
     /**
-     * Copies a file.
+     * Copies a file or directory.
      *
      * @param fin File to copy
      * @param fout New file
@@ -765,6 +767,34 @@ public static void copy(File fin, File fout) throws IOException {
     }
 
 
+    /**
+     * Computes file or directory size. Follows symlinks just for the provided parameter, but not
+     * for files under the tree.
+     *
+     * @param fileOrDirectory
+     * @return summary of sizes of regular files.
+     * @throws IOException if any file size cannot be read.
+     */
+    public static long getSize(File fileOrDirectory) throws IOException {
+        try {
+            return Files.walk(fileOrDirectory.getCanonicalFile().toPath())
+                .filter(p -> Files.isRegularFile(p, LinkOption.NOFOLLOW_LINKS)).mapToLong(FileUtils::getRegularFileSize)
+                .sum();
+        } catch (IllegalStateException e) {
+            throw new IOException("Could not read size of " + fileOrDirectory, e);
+        }
+    }
+
+
+    private static long getRegularFileSize(Path path) {
+        try {
+            return Files.size(path);
+        } catch (IOException e) {
+            throw new IllegalStateException("Could not read file size for " + path, e);
+        }
+    }
+
+
     /**
      * Returns a String with uniform slashes such that all the
      * occurances of '\\' are replaced with '/'.
@@ -1057,7 +1087,7 @@ private static class FileOutputStreamWork implements RetriableWork {
         private Throwable lastError;
         private final File out;
 
-        public FileOutputStreamWork(File out) {
+        private FileOutputStreamWork(File out) {
             this.out = out;
         }
 

nucleus/common/common-util/src/test/java/com/sun/enterprise/util/io/FileUtilsTest.java

@@ -88,7 +88,7 @@ public void testCopyDirectoriesFiles() throws Exception {
         File outputDir = new File(tempDir, "outputDir");
         File testDir = new File(FileUtilsTest.class.getResource("/process").toURI());
         FileUtils.copy(testDir, outputDir);
-        assertEquals(testDir.length(), outputDir.length());
+        assertEquals(FileUtils.getSize(testDir), FileUtils.getSize(outputDir));
     }