public void testHardLinks() throws Exception {
    if (!SystemInfo.isWindows && !SystemInfo.isUnix) {
      System.err.println(getName() + " skipped: " + SystemInfo.OS_NAME);
      return;
    }

    final boolean safeWrite = GeneralSettings.getInstance().isUseSafeWrite();
    final File dir = FileUtil.createTempDirectory("hardlinks.", ".dir", false);
    final SafeWriteRequestor requestor = new SafeWriteRequestor() {};
    try {
      GeneralSettings.getInstance().setUseSafeWrite(false);

      final File targetFile = new File(dir, "targetFile");
      assertTrue(targetFile.createNewFile());
      final File hardLinkFile =
          IoTestUtil.createHardLink(targetFile.getAbsolutePath(), "hardLinkFile");

      final VirtualFile file = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(targetFile);
      assertNotNull(file);
      file.setBinaryContent("hello".getBytes("UTF-8"), 0, 0, requestor);
      assertTrue(file.getLength() > 0);

      final VirtualFile check =
          LocalFileSystem.getInstance().refreshAndFindFileByIoFile(hardLinkFile);
      assertNotNull(check);
      assertEquals(file.getLength(), check.getLength());
      assertEquals("hello", VfsUtilCore.loadText(check));
    } finally {
      GeneralSettings.getInstance().setUseSafeWrite(safeWrite);
      FileUtil.delete(dir);
    }
  }
  public void testFileLength() throws Exception {
    File file = FileUtil.createTempFile("test", "txt");
    FileUtil.writeToFile(file, "hello");
    VirtualFile virtualFile = LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file);
    assertNotNull(virtualFile);
    String s = VfsUtilCore.loadText(virtualFile);
    assertEquals("hello", s);
    assertEquals(5, virtualFile.getLength());

    FileUtil.writeToFile(file, "new content");
    ((PersistentFSImpl) PersistentFS.getInstance()).cleanPersistedContents();
    s = VfsUtilCore.loadText(virtualFile);
    assertEquals("new content", s);
    assertEquals(11, virtualFile.getLength());
  }
Esempio n. 3
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  @Override
  @NotNull
  public byte[] contentsToByteArray(@NotNull final VirtualFile file, boolean cacheContent)
      throws IOException {
    InputStream contentStream = null;
    boolean reloadFromDelegate;
    boolean outdated;
    int fileId;
    synchronized (myInputLock) {
      fileId = getFileId(file);
      outdated = checkFlag(fileId, MUST_RELOAD_CONTENT) || FSRecords.getLength(fileId) == -1L;
      reloadFromDelegate = outdated || (contentStream = readContent(file)) == null;
    }

    if (reloadFromDelegate) {
      final NewVirtualFileSystem delegate = getDelegate(file);

      final byte[] content;
      if (outdated) {
        // in this case, file can have out-of-date length. so, update it first (it's needed for
        // correct contentsToByteArray() work)
        // see IDEA-90813 for possible bugs
        FSRecords.setLength(fileId, delegate.getLength(file));
        content = delegate.contentsToByteArray(file);
      } else {
        // a bit of optimization
        content = delegate.contentsToByteArray(file);
        FSRecords.setLength(fileId, content.length);
      }

      ApplicationEx application = (ApplicationEx) ApplicationManager.getApplication();
      // we should cache every local files content
      // because the local history feature is currently depends on this cache,
      // perforce offline mode as well
      if ((!delegate.isReadOnly()
              ||
              // do not cache archive content unless asked
              cacheContent && !application.isInternal() && !application.isUnitTestMode())
          && content.length <= PersistentFSConstants.FILE_LENGTH_TO_CACHE_THRESHOLD) {
        synchronized (myInputLock) {
          writeContent(file, new ByteSequence(content), delegate.isReadOnly());
          setFlag(file, MUST_RELOAD_CONTENT, false);
        }
      }

      return content;
    } else {
      try {
        final int length = (int) file.getLength();
        assert length >= 0 : file;
        return FileUtil.loadBytes(contentStream, length);
      } catch (IOException e) {
        throw FSRecords.handleError(e);
      }
    }
  }