def exists(self, path):
"""Check if the provided path exists on the FileSystem.
Args:
path: string path that needs to be checked.
Returns: boolean flag indicating if path exists
"""
try:
return blobstorageio.BlobStorageIO().exists(path)
except Exception as e: # pylint: disable=broad-except
raise BeamIOError("Exists operation failed", {path: e})
def last_updated(self, path):
"""Get UNIX Epoch time in seconds on the FileSystem.
Args:
path: string path of file.
Returns: float UNIX Epoch time
Raises:
``BeamIOError``: if path doesn't exist.
"""
try:
return blobstorageio.BlobStorageIO().last_updated(path)
except Exception as e: # pylint: disable=broad-except
raise BeamIOError("Last updated operation failed", {path: e})
def size(self, path):
"""Get size in bytes of a file on the FileSystem.
Args:
path: string filepath of file.
Returns: int size of file according to the FileSystem.
Raises:
``BeamIOError``: if path doesn't exist.
"""
try:
return blobstorageio.BlobStorageIO().size(path)
except Exception as e: # pylint: disable=broad-except
raise BeamIOError("Size operation failed", {path: e})
def copy(self, source_file_names, destination_file_names):
"""Recursively copy the file tree from the source to the destination
Args:
source_file_names: list of source file objects that needs to be copied
destination_file_names: list of destination of the new object
Raises:
``BeamIOError``: if any of the copy operations fail
"""
if not len(source_file_names) == len(destination_file_names):
message = 'Unable to copy unequal number of sources and destinations.'
raise BeamIOError(message)
src_dest_pairs = list(zip(source_file_names, destination_file_names))
return blobstorageio.BlobStorageIO().copy_paths(src_dest_pairs)
def checksum(self, path):
"""Fetch checksum metadata of a file on the
:class:`~apache_beam.io.filesystem.FileSystem`.
Args:
path: string path of a file.
Returns: string containing checksum
Raises:
``BeamIOError``: if path isn't a file or doesn't exist.
"""
try:
return blobstorageio.BlobStorageIO().checksum(path)
except Exception as e: # pylint: disable=broad-except
raise BeamIOError("Checksum operation failed", {path, e})
def _path_open(self,
path,
mode,
mime_type='application/octet-stream',
compression_type=CompressionTypes.AUTO):
"""Helper functions to open a file in the provided mode.
"""
compression_type = FileSystem._get_compression_type(
path, compression_type)
mime_type = CompressionTypes.mime_type(compression_type, mime_type)
raw_file = blobstorageio.BlobStorageIO().open(path,
mode,
mime_type=mime_type)
if compression_type == CompressionTypes.UNCOMPRESSED:
return raw_file
return CompressedFile(raw_file, compression_type=compression_type)
def _list(self, dir_or_prefix):
"""List files in a location.
Listing is non-recursive (for filesystems that support directories).
Args:
dir_or_prefix: (string) A directory or location prefix (for filesystems
that don't have directories).
Returns:
Generator of ``FileMetadata`` objects.
Raises:
``BeamIOError``: if listing fails, but not if no files were found.
"""
try:
for path, (size, updated) in blobstorageio.BlobStorageIO() \
.list_prefix(dir_or_prefix, with_metadata=True).items():
yield FileMetadata(path, size, updated)
except Exception as e: # pylint: disable=broad-except
raise BeamIOError("List operation failed", {dir_or_prefix: e})
def metadata(self, path):
"""Fetch metadata fields of a file on the FileSystem.
Args:
path: string path of a file.
Returns:
:class:`~apache_beam.io.filesystem.FileMetadata`.
Raises:
``BeamIOError``: if path isn't a file or doesn't exist.
"""
try:
file_metadata = blobstorageio.BlobStorageIO()._status(path)
return FileMetadata(path, file_metadata['size'],
file_metadata['last_updated'])
except Exception as e: # pylint: disable=broad-except
raise BeamIOError("Metadata operation failed", {path: e})
def delete(self, paths):
"""Deletes files or directories at the provided paths.
Directories will be deleted recursively.
Args:
paths: list of paths that give the file objects to be deleted
Raises:
``BeamIOError``: if any of the delete operations fail
"""
results = blobstorageio.BlobStorageIO().delete_paths(paths)
# Retrieve exceptions.
exceptions = {
path: error
for (path, error) in results.items() if error is not None
}
if exceptions:
raise BeamIOError("Delete operation failed", exceptions)
def rename(self, source_file_names, destination_file_names):
"""Rename the files at the source list to the destination list.
Source and destination lists should be of the same size.
Args:
source_file_names: List of file paths that need to be moved
destination_file_names: List of destination_file_names for the files
Raises:
``BeamIOError``: if any of the rename operations fail
"""
if not len(source_file_names) == len(destination_file_names):
message = 'Unable to rename unequal number of sources and destinations.'
raise BeamIOError(message)
src_dest_pairs = list(zip(source_file_names, destination_file_names))
results = blobstorageio.BlobStorageIO().rename_files(src_dest_pairs)
# Retrieve exceptions.
exceptions = {(src, dest): error
for (src, dest, error) in results if error is not None}
if exceptions:
raise BeamIOError("Rename operation failed.", exceptions)
def setUp(self):
self.azfs = blobstorageio.BlobStorageIO()
self.TEST_DATA_PATH = 'azfs://gsoc2020/gsoc/'
