How to use

getInstance

method

in

org.apache.commons.vfs2.provider.ram.RamFileSystemConfigBuilder

/**
 * @param newSize
 * @throws IOException if the new size exceeds the limit
 */
synchronized void resize(final long newSize) throws IOException {
  final RamFileSystem afs = getAbstractFileSystem();
  final FileSystemOptions afsOptions = afs.getFileSystemOptions();
  if (afsOptions != null) {
    final long maxSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(afsOptions);
    if (afs.size() + newSize - this.size() > maxSize) {
      throw new IOException("FileSystem capacity (" + maxSize + ") exceeded.");
    }
  }
  this.data.resize(newSize);
}

/**
 * @param newSize
 * @throws IOException if the new size exceeds the limit
 */
synchronized void resize(final long newSize) throws IOException {
  final RamFileSystem afs = getAbstractFileSystem();
  final FileSystemOptions afsOptions = afs.getFileSystemOptions();
  if (afsOptions != null) {
    final long maxSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(afsOptions);
    if (afs.size() + newSize - this.size() > maxSize) {
      throw new IOException("FileSystem capacity (" + maxSize + ") exceeded.");
    }
  }
  this.data.resize(newSize);
}

/**
 * @param newSize
 * @throws IOException if the new size exceeds the limit
 */
synchronized void resize(final long newSize) throws IOException {
  final RamFileSystem afs = getAbstractFileSystem();
  final FileSystemOptions afsOptions = afs.getFileSystemOptions();
  if (afsOptions != null) {
    final long maxSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(afsOptions);
    if (afs.size() + newSize - this.size() > maxSize) {
      throw new IOException("FileSystem capacity (" + maxSize + ") exceeded.");
    }
  }
  this.data.resize(newSize);
}

/**
 * @param newSize
 * @throws IOException
 *             if the new size exceeds the limit
 */
synchronized void resize(final long newSize) throws IOException
{
  final RamFileSystem afs = getAbstractFileSystem();
  final FileSystemOptions afsOptions = afs.getFileSystemOptions();
  if (afsOptions != null)
  {
    final long maxSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(afsOptions);
    if (afs.size() + newSize - this.size() > maxSize)
    {
      throw new IOException("FileSystem capacity (" + maxSize + ") exceeded.");
    }
  }
  this.data.resize(newSize);
}

@Before
public void setUp() throws Exception {
  manager = new DefaultFileSystemManager();
  manager.addProvider("ram", new RamFileProvider());
  manager.init();
  // File Systems Options
  RamFileSystemConfigBuilder.getInstance().setMaxSize(zeroSizedFso, 0L);
  RamFileSystemConfigBuilder.getInstance().setMaxSize(smallSizedFso, 10L);
}

@Before
public void setUp() throws Exception
{
  manager = new DefaultFileSystemManager();
  manager.addProvider("ram", new RamFileProvider());
  manager.init();
  // File Systems Options
  RamFileSystemConfigBuilder.getInstance().setMaxSize(zeroSizedFso, 0L);
  RamFileSystemConfigBuilder.getInstance().setMaxSize(smallSizedFso, 10L);
}

@Before
public void setUp() throws Exception {
  manager = new DefaultFileSystemManager();
  manager.addProvider("ram", new RamFileProvider());
  manager.init();
  // File Systems Options
  RamFileSystemConfigBuilder.getInstance().setMaxSize(zeroSizedFso, 0L);
  RamFileSystemConfigBuilder.getInstance().setMaxSize(smallSizedFso, 10L);
}

@Test
public void testFSOptions() throws Exception {
  // Default FS
  final FileObject fo1 = manager.resolveFile("ram:/");
  final FileObject fo2 = manager.resolveFile("ram:/");
  assertTrue("Both files should exist in the same fs instance.", fo1.getFileSystem() == fo2.getFileSystem());
  FileSystemOptions fsOptions = fo1.getFileSystem().getFileSystemOptions();
  long maxFilesystemSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(fsOptions);
  assertEquals("Filesystem option maxSize must be unlimited", Long.MAX_VALUE, maxFilesystemSize);
  // Small FS
  final FileObject fo3 = manager.resolveFile("ram:/fo3", smallSizedFso);
  final FileObject fo4 = manager.resolveFile("ram:/", smallSizedFso);
  assertTrue("Both files should exist in the same FileSystem instance.",
      fo3.getFileSystem() == fo4.getFileSystem());
  assertTrue("Both files should exist in different FileSystem instance.",
      fo1.getFileSystem() != fo3.getFileSystem());
  fsOptions = fo3.getFileSystem().getFileSystemOptions();
  maxFilesystemSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(fsOptions);
  assertEquals("Filesystem option maxSize must be set", 10, maxFilesystemSize);
}

@Test
public void testFSOptions() throws Exception
{
  // Default FS
  final FileObject fo1 = manager.resolveFile("ram:/");
  final FileObject fo2 = manager.resolveFile("ram:/");
  assertTrue("Both files should exist in the same fs instance.", fo1.getFileSystem() == fo2.getFileSystem());
  FileSystemOptions fsOptions = fo1.getFileSystem().getFileSystemOptions();
  long maxFilesystemSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(fsOptions);
  assertEquals("Filesystem option maxSize must be unlimited", Long.MAX_VALUE, maxFilesystemSize);
  // Small FS
  final FileObject fo3 = manager.resolveFile("ram:/fo3", smallSizedFso);
  final FileObject fo4 = manager.resolveFile("ram:/", smallSizedFso);
  assertTrue("Both files should exist in the same FileSystem instance.", fo3.getFileSystem() == fo4.getFileSystem());
  assertTrue("Both files should exist in different FileSystem instance.", fo1.getFileSystem() != fo3.getFileSystem());
  fsOptions = fo3.getFileSystem().getFileSystemOptions();
  maxFilesystemSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(fsOptions);
  assertEquals("Filesystem option maxSize must be set", 10, maxFilesystemSize);
}

@Test
public void testFSOptions() throws Exception {
  // Default FS
  final FileObject fo1 = manager.resolveFile("ram:/");
  final FileObject fo2 = manager.resolveFile("ram:/");
  assertTrue("Both files should exist in the same fs instance.", fo1.getFileSystem() == fo2.getFileSystem());
  FileSystemOptions fsOptions = fo1.getFileSystem().getFileSystemOptions();
  long maxFilesystemSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(fsOptions);
  assertEquals("Filesystem option maxSize must be unlimited", Long.MAX_VALUE, maxFilesystemSize);
  // Small FS
  final FileObject fo3 = manager.resolveFile("ram:/fo3", smallSizedFso);
  final FileObject fo4 = manager.resolveFile("ram:/", smallSizedFso);
  assertTrue("Both files should exist in the same FileSystem instance.",
      fo3.getFileSystem() == fo4.getFileSystem());
  assertTrue("Both files should exist in different FileSystem instance.",
      fo1.getFileSystem() != fo3.getFileSystem());
  fsOptions = fo3.getFileSystem().getFileSystemOptions();
  maxFilesystemSize = RamFileSystemConfigBuilder.getInstance().getLongMaxSize(fsOptions);
  assertEquals("Filesystem option maxSize must be set", 10, maxFilesystemSize);
}