Examples with FileAlreadyExistsException org.apache.hadoop.fs.FileAlreadyExistsException used on opensource projects

Example 26 with FileAlreadyExistsException

use of org.apache.hadoop.fs.FileAlreadyExistsException in project hadoop by apache.

the class HdfsAdmin method provisionEZTrash.

private void provisionEZTrash(Path path) throws IOException {
    // make sure the path is an EZ
    EncryptionZone ez = dfs.getEZForPath(path);
    if (ez == null) {
        throw new IllegalArgumentException(path + " is not an encryption zone.");
    }
    String ezPath = ez.getPath();
    if (!path.toString().equals(ezPath)) {
        throw new IllegalArgumentException(path + " is not the root of an " + "encryption zone. Do you mean " + ez.getPath() + "?");
    }
    // check if the trash directory exists
    Path trashPath = new Path(ez.getPath(), FileSystem.TRASH_PREFIX);
    try {
        FileStatus trashFileStatus = dfs.getFileStatus(trashPath);
        String errMessage = "Will not provision new trash directory for " + "encryption zone " + ez.getPath() + ". Path already exists.";
        if (!trashFileStatus.isDirectory()) {
            errMessage += "\r\n" + "Warning: " + trashPath.toString() + " is not a directory";
        }
        if (!trashFileStatus.getPermission().equals(TRASH_PERMISSION)) {
            errMessage += "\r\n" + "Warning: the permission of " + trashPath.toString() + " is not " + TRASH_PERMISSION;
        }
        throw new FileAlreadyExistsException(errMessage);
    } catch (FileNotFoundException ignored) {
    // no trash path
    }
    // Update the permission bits
    dfs.mkdir(trashPath, TRASH_PERMISSION);
    dfs.setPermission(trashPath, TRASH_PERMISSION);
}

Example 27 with FileAlreadyExistsException

use of org.apache.hadoop.fs.FileAlreadyExistsException in project hadoop by apache.

the class FTPFileSystem method create.

/**
   * A stream obtained via this call must be closed before using other APIs of
   * this class or else the invocation will block.
   */
@Override
public FSDataOutputStream create(Path file, FsPermission permission, boolean overwrite, int bufferSize, short replication, long blockSize, Progressable progress) throws IOException {
    final FTPClient client = connect();
    Path workDir = new Path(client.printWorkingDirectory());
    Path absolute = makeAbsolute(workDir, file);
    FileStatus status;
    try {
        status = getFileStatus(client, file);
    } catch (FileNotFoundException fnfe) {
        status = null;
    }
    if (status != null) {
        if (overwrite && !status.isDirectory()) {
            delete(client, file, false);
        } else {
            disconnect(client);
            throw new FileAlreadyExistsException("File already exists: " + file);
        }
    }
    Path parent = absolute.getParent();
    if (parent == null || !mkdirs(client, parent, FsPermission.getDirDefault())) {
        parent = (parent == null) ? new Path("/") : parent;
        disconnect(client);
        throw new IOException("create(): Mkdirs failed to create: " + parent);
    }
    client.allocate(bufferSize);
    // Change to parent directory on the server. Only then can we write to the
    // file on the server by opening up an OutputStream. As a side effect the
    // working directory on the server is changed to the parent directory of the
    // file. The FTP client connection is closed when close() is called on the
    // FSDataOutputStream.
    client.changeWorkingDirectory(parent.toUri().getPath());
    FSDataOutputStream fos = new FSDataOutputStream(client.storeFileStream(file.getName()), statistics) {

        @Override
        public void close() throws IOException {
            super.close();
            if (!client.isConnected()) {
                throw new FTPException("Client not connected");
            }
            boolean cmdCompleted = client.completePendingCommand();
            disconnect(client);
            if (!cmdCompleted) {
                throw new FTPException("Could not complete transfer, Reply Code - " + client.getReplyCode());
            }
        }
    };
    if (!FTPReply.isPositivePreliminary(client.getReplyCode())) {
        // The ftpClient is an inconsistent state. Must close the stream
        // which in turn will logout and disconnect from FTP server
        fos.close();
        throw new IOException("Unable to create file: " + file + ", Aborting");
    }
    return fos;
}

Example 28 with FileAlreadyExistsException

use of org.apache.hadoop.fs.FileAlreadyExistsException in project hadoop by apache.

the class FTPFileSystem method rename.

/**
   * Convenience method, so that we don't open a new connection when using this
   * method from within another method. Otherwise every API invocation incurs
   * the overhead of opening/closing a TCP connection.
   * 
   * @param client
   * @param src
   * @param dst
   * @return
   * @throws IOException
   */
@SuppressWarnings("deprecation")
private boolean rename(FTPClient client, Path src, Path dst) throws IOException {
    Path workDir = new Path(client.printWorkingDirectory());
    Path absoluteSrc = makeAbsolute(workDir, src);
    Path absoluteDst = makeAbsolute(workDir, dst);
    if (!exists(client, absoluteSrc)) {
        throw new FileNotFoundException("Source path " + src + " does not exist");
    }
    if (isDirectory(absoluteDst)) {
        // destination is a directory: rename goes underneath it with the
        // source name
        absoluteDst = new Path(absoluteDst, absoluteSrc.getName());
    }
    if (exists(client, absoluteDst)) {
        throw new FileAlreadyExistsException("Destination path " + dst + " already exists");
    }
    String parentSrc = absoluteSrc.getParent().toUri().toString();
    String parentDst = absoluteDst.getParent().toUri().toString();
    if (isParentOf(absoluteSrc, absoluteDst)) {
        throw new IOException("Cannot rename " + absoluteSrc + " under itself" + " : " + absoluteDst);
    }
    if (!parentSrc.equals(parentDst)) {
        throw new IOException("Cannot rename source: " + absoluteSrc + " to " + absoluteDst + " -" + E_SAME_DIRECTORY_ONLY);
    }
    String from = absoluteSrc.getName();
    String to = absoluteDst.getName();
    client.changeWorkingDirectory(parentSrc);
    boolean renamed = client.rename(from, to);
    return renamed;
}

Example 29 with FileAlreadyExistsException

use of org.apache.hadoop.fs.FileAlreadyExistsException in project hadoop by apache.

the class AbstractContractCreateTest method testOverwriteNonEmptyDirectory.

@Test
public void testOverwriteNonEmptyDirectory() throws Throwable {
    describe("verify trying to create a file over a non-empty dir fails");
    Path path = path("testOverwriteNonEmptyDirectory");
    mkdirs(path);
    try {
        assertIsDirectory(path);
    } catch (AssertionError failure) {
        if (isSupported(CREATE_OVERWRITES_DIRECTORY)) {
            // file/directory hack surfaces here
            throw new AssumptionViolatedException(failure.toString(), failure);
        }
        // else: rethrow
        throw failure;
    }
    Path child = new Path(path, "child");
    writeTextFile(getFileSystem(), child, "child file", true);
    byte[] data = dataset(256, 'a', 'z');
    try {
        writeDataset(getFileSystem(), path, data, data.length, 1024, true);
        FileStatus status = getFileSystem().getFileStatus(path);
        boolean isDir = status.isDirectory();
        if (!isDir && isSupported(CREATE_OVERWRITES_DIRECTORY)) {
            // For some file systems, downgrade to a skip so that the failure is
            // visible in test results.
            skip("This Filesystem allows a file to overwrite a directory");
        }
        fail("write of file over dir succeeded");
    } catch (FileAlreadyExistsException expected) {
        //expected
        handleExpectedException(expected);
    } catch (FileNotFoundException e) {
        handleRelaxedException("overwriting a dir with a file ", "FileAlreadyExistsException", e);
    } catch (IOException e) {
        handleRelaxedException("overwriting a dir with a file ", "FileAlreadyExistsException", e);
    }
    assertIsDirectory(path);
    assertIsFile(child);
}

Example 30 with FileAlreadyExistsException

use of org.apache.hadoop.fs.FileAlreadyExistsException in project hadoop by apache.

the class AbstractContractCreateTest method testOverwriteEmptyDirectory.

@Test
public void testOverwriteEmptyDirectory() throws Throwable {
    describe("verify trying to create a file over an empty dir fails");
    Path path = path("testOverwriteEmptyDirectory");
    mkdirs(path);
    assertIsDirectory(path);
    byte[] data = dataset(256, 'a', 'z');
    try {
        writeDataset(getFileSystem(), path, data, data.length, 1024, true);
        assertIsDirectory(path);
        fail("write of file over empty dir succeeded");
    } catch (FileAlreadyExistsException expected) {
        //expected
        handleExpectedException(expected);
    } catch (FileNotFoundException e) {
        handleRelaxedException("overwriting a dir with a file ", "FileAlreadyExistsException", e);
    } catch (IOException e) {
        handleRelaxedException("overwriting a dir with a file ", "FileAlreadyExistsException", e);
    }
    assertIsDirectory(path);
}