def getmerge(self, path, local_destination, new_line=False):
if new_line:
cmd = load_hadoop_cmd() + [
'fs', '-getmerge', '-nl', path, local_destination
]
else:
cmd = load_hadoop_cmd() + [
'fs', '-getmerge', path, local_destination
]
self.call_check(cmd)
def remove(self, path, recursive=True, skip_trash=False):
if recursive:
cmd = load_hadoop_cmd() + ['fs', '-rmr']
else:
cmd = load_hadoop_cmd() + ['fs', '-rm']
if skip_trash:
cmd = cmd + ['-skipTrash']
cmd = cmd + [path]
call_check(cmd)
def chown(self, path, owner, group, recursive=False):
if owner is None:
owner = ''
if group is None:
group = ''
ownership = "%s:%s" % (owner, group)
if recursive:
cmd = load_hadoop_cmd() + ['fs', '-chown', '-R', ownership, path]
else:
cmd = load_hadoop_cmd() + ['fs', '-chown', ownership, path]
call_check(cmd)
def chown(self, path, owner, group, recursive=False):
if owner is None:
owner = ''
if group is None:
group = ''
ownership = "%s:%s" % (owner, group)
if recursive:
cmd = load_hadoop_cmd() + ['fs', '-chown', '-R', ownership, path]
else:
cmd = load_hadoop_cmd() + ['fs', '-chown', ownership, path]
self.call_check(cmd)
def remove(self, path, recursive=True, skip_trash=False):
if recursive:
cmd = load_hadoop_cmd() + ['fs', '-rmr']
else:
cmd = load_hadoop_cmd() + ['fs', '-rm']
if skip_trash:
cmd = cmd + ['-skipTrash']
cmd = cmd + [path]
self.call_check(cmd)
def listdir(self,
path,
ignore_directories=False,
ignore_files=False,
include_size=False,
include_type=False,
include_time=False,
recursive=False):
if not path:
path = "." # default to current/home catalog
if recursive:
cmd = load_hadoop_cmd() + ['fs'
] + self.recursive_listdir_cmd + [path]
else:
cmd = load_hadoop_cmd() + ['fs', '-ls', path]
lines = self.call_check(cmd).split('\n')
for line in lines:
if not line:
continue
elif line.startswith(
'OpenJDK 64-Bit Server VM warning') or line.startswith(
'It\'s highly recommended') or line.startswith(
'Found'):
continue # "hadoop fs -ls" outputs "Found %d items" as its first line
elif ignore_directories and line[0] == 'd':
continue
elif ignore_files and line[0] == '-':
continue
data = line.split(' ')
file = data[-1]
size = int(data[-4])
line_type = line[0]
extra_data = ()
if include_size:
extra_data += (size, )
if include_type:
extra_data += (line_type, )
if include_time:
time_str = '%sT%s' % (data[-3], data[-2])
modification_time = datetime.datetime.strptime(
time_str, '%Y-%m-%dT%H:%M')
extra_data += (modification_time, )
if len(extra_data) > 0:
yield (file, ) + extra_data
else:
yield file
def __init__(self, path, data_extension=""):
self.path = path
self.tmppath = hdfs_config.tmppath(self.path)
self.datapath = self.tmppath + ("/data%s" % data_extension)
super(HdfsAtomicWriteDirPipe,
self).__init__(load_hadoop_cmd() +
['fs', '-put', '-', self.datapath])
def __init__(self, path):
self.path = path
self.tmppath = hdfs_config.tmppath(self.path)
parent_dir = os.path.dirname(self.tmppath)
mkdir(parent_dir, parents=True, raise_if_exists=False)
super(HdfsAtomicWritePipe,
self).__init__(load_hadoop_cmd() +
['fs', '-put', '-', self.tmppath])
def rename(self, path, dest):
parent_dir = os.path.dirname(dest)
if parent_dir != '' and not self.exists(parent_dir):
self.mkdir(parent_dir)
if type(path) not in (list, tuple):
path = [path]
else:
warnings.warn("Renaming multiple files at once is not atomic.")
call_check(load_hadoop_cmd() + ['fs', '-mv'] + path + [dest])
def rename(self, path, dest):
parent_dir = os.path.dirname(dest)
if parent_dir != '' and not self.exists(parent_dir):
self.mkdir(parent_dir)
if type(path) not in (list, tuple):
path = [path]
else:
warnings.warn("Renaming multiple files at once is not atomic.")
call_check(load_hadoop_cmd() + ['fs', '-mv'] + path + [dest])
def move(self, path, dest):
parent_dir = os.path.dirname(dest)
if parent_dir != '' and not self.exists(parent_dir):
self.mkdir(parent_dir)
if not isinstance(path, (list, tuple)):
path = [path]
else:
warnings.warn("Renaming multiple files at once is not atomic.", stacklevel=2)
self.call_check(load_hadoop_cmd() + ['fs', '-mv'] + path + [dest])
def exists(self, path):
cmd = load_hadoop_cmd() + ['fs', '-test', '-e', path]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
stdout, stderr = p.communicate()
if p.returncode == 0:
return True
elif p.returncode == 1:
return False
else:
raise hdfs_error.HDFSCliError(cmd, p.returncode, stdout, stderr)
def exists(self, path):
cmd = load_hadoop_cmd() + ['fs', '-test', '-e', path]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True)
stdout, stderr = p.communicate()
if p.returncode == 0:
return True
elif p.returncode == 1:
return False
else:
raise HDFSCliError(cmd, p.returncode, stdout, stderr)
def mkdir(self, path):
"""
No -p switch, so this will fail creating ancestors.
"""
try:
call_check(load_hadoop_cmd() + ['fs', '-mkdir', path])
except HDFSCliError as ex:
if "File exists" in ex.stderr:
raise FileAlreadyExists(ex.stderr)
else:
raise
def mkdir(self, path):
"""
No -p switch, so this will fail creating ancestors.
"""
try:
self.call_check(load_hadoop_cmd() + ['fs', '-mkdir', path])
except hdfs_error.HDFSCliError as ex:
if "File exists" in ex.stderr:
raise FileAlreadyExists(ex.stderr)
else:
raise
def mkdir(self, path, parents=True, raise_if_exists=False):
"""
No explicit -p switch, this version of Hadoop always creates parent directories.
"""
try:
self.call_check(load_hadoop_cmd() + ['fs', '-mkdir', path])
except hdfs_error.HDFSCliError as ex:
if "File exists" in ex.stderr:
raise FileAlreadyExists(ex.stderr)
else:
raise
def count(self, path):
cmd = load_hadoop_cmd() + ['fs', '-count', path]
stdout = self.call_check(cmd)
lines = stdout.split('\n')
for line in stdout.split('\n'):
if line.startswith("OpenJDK 64-Bit Server VM warning") or line.startswith("It's highly recommended") or not line:
lines.pop(lines.index(line))
else:
(dir_count, file_count, content_size, ppath) = stdout.split()
results = {'content_size': content_size, 'dir_count': dir_count, 'file_count': file_count}
return results
def count(self, path):
cmd = load_hadoop_cmd() + ['fs', '-count', path]
stdout = call_check(cmd)
lines = stdout.split('\n')
for line in stdout.split('\n'):
if line.startswith("OpenJDK 64-Bit Server VM warning") or line.startswith("It's highly recommended") or not line:
lines.pop(lines.index(line))
else:
(dir_count, file_count, content_size, ppath) = stdout.split()
results = {'content_size': content_size, 'dir_count': dir_count, 'file_count': file_count}
return results
def listdir(self, path, ignore_directories=False, ignore_files=False,
include_size=False, include_type=False, include_time=False, recursive=False):
if not path:
path = "." # default to current/home catalog
if recursive:
cmd = load_hadoop_cmd() + ['fs'] + self.recursive_listdir_cmd + [path]
else:
cmd = load_hadoop_cmd() + ['fs', '-ls', path]
lines = call_check(cmd).split('\n')
for line in lines:
if not line:
continue
elif line.startswith('OpenJDK 64-Bit Server VM warning') or line.startswith('It\'s highly recommended') or line.startswith('Found'):
continue # "hadoop fs -ls" outputs "Found %d items" as its first line
elif ignore_directories and line[0] == 'd':
continue
elif ignore_files and line[0] == '-':
continue
data = line.split(' ')
file = data[-1]
size = int(data[-4])
line_type = line[0]
extra_data = ()
if include_size:
extra_data += (size,)
if include_type:
extra_data += (line_type,)
if include_time:
time_str = '%sT%s' % (data[-3], data[-2])
modification_time = datetime.datetime.strptime(time_str,
'%Y-%m-%dT%H:%M')
extra_data += (modification_time,)
if len(extra_data) > 0:
yield (file,) + extra_data
else:
yield file
def mkdir(self, path, parents=True, raise_if_exists=False):
if parents and raise_if_exists:
raise NotImplementedError("HdfsClient.mkdir can't raise with -p")
try:
cmd = (load_hadoop_cmd() + ['fs', '-mkdir'] +
(['-p'] if parents else []) + [path])
self.call_check(cmd)
except hdfs_error.HDFSCliError as ex:
if "File exists" in ex.stderr:
if raise_if_exists:
raise FileAlreadyExists(ex.stderr)
else:
raise
def mkdir(self, path, parents=True, raise_if_exists=False):
if (parents and raise_if_exists):
raise NotImplementedError("HdfsClient.mkdir can't raise with -p")
try:
cmd = (load_hadoop_cmd() + ['fs', '-mkdir'] +
(['-p'] if parents else []) +
[path])
call_check(cmd)
except HDFSCliError as ex:
if "File exists" in ex.stderr:
if raise_if_exists:
raise FileAlreadyExists(ex.stderr)
else:
raise
def count(self, path):
cmd = load_hadoop_cmd() + ['fs', '-count', path]
stdout = self.call_check(cmd)
lines = stdout.split('\n')
for line in stdout.split('\n'):
if line.startswith("OpenJDK 64-Bit Server VM warning") or line.startswith("It's highly recommended") or \
line.endswith('using builtin-java classes where applicable') or not line:
lines.pop(
lines.index(line)) # ignoring native libraries warnings
else:
(dir_count, file_count, content_size, ppath) = stdout.split()
results = {
'content_size': content_size,
'dir_count': dir_count,
'file_count': file_count
}
return results
def count(self, path):
cmd = load_hadoop_cmd() + ['fs', '-count', path]
logger.debug('Running path count check: %s', subprocess.list2cmdline(cmd))
stdout = self.call_check(cmd)
lines = stdout.split('\n')
results = {'content_size': 0, 'dir_count': 0, 'file_count': 0}
for line in lines:
if line.startswith("OpenJDK 64-Bit Server VM warning") or line.startswith("It's highly recommended") or not line:
continue
else:
(dir_count, file_count, content_size, ppath) = line.split()
results['dir_count'] += int(dir_count)
results['file_count'] += int(file_count)
results['content_size'] += int(content_size)
logger.debug('Path count check on %s: %s', path, results)
return results
def exists(self, path):
"""
Use ``hadoop fs -stat`` to check file existence.
"""
cmd = load_hadoop_cmd() + ['fs', '-stat', path]
logger.debug('Running file existence check: %s', subprocess.list2cmdline(cmd))
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True, universal_newlines=True)
stdout, stderr = p.communicate()
if p.returncode == 0:
return True
else:
not_found_pattern = "^.*No such file or directory$"
not_found_re = re.compile(not_found_pattern)
for line in stderr.split('\n'):
if not_found_re.match(line):
return False
raise hdfs_error.HDFSCliError(cmd, p.returncode, stdout, stderr)
def exists(self, path):
"""
Use ``hadoop fs -stat`` to check file existence.
"""
cmd = load_hadoop_cmd() + ['fs', '-stat', path]
logger.debug('Running file existence check: %s', u' '.join(cmd))
p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True, universal_newlines=True)
stdout, stderr = p.communicate()
if p.returncode == 0:
return True
else:
not_found_pattern = "^.*No such file or directory$"
not_found_re = re.compile(not_found_pattern)
for line in stderr.split('\n'):
if not_found_re.match(line):
return False
raise HDFSCliError(cmd, p.returncode, stdout, stderr)
def __init__(self, path):
super(HdfsReadPipe,
self).__init__(load_hadoop_cmd() + ['fs', '-cat', path])
def __init__(self, path, data_extension=""):
self.path = path
self.tmppath = hdfs_config.tmppath(self.path)
self.datapath = self.tmppath + ("/data%s" % data_extension)
super(HdfsAtomicWriteDirPipe, self).__init__(load_hadoop_cmd() + ['fs', '-put', '-', self.datapath])
def __init__(self, path):
self.path = path
self.tmppath = hdfs_config.tmppath(self.path)
parent_dir = os.path.dirname(self.tmppath)
mkdir(parent_dir, parents=True, raise_if_exists=False)
super(HdfsAtomicWritePipe, self).__init__(load_hadoop_cmd() + ['fs', '-put', '-', self.tmppath])
def __init__(self, path):
super(HdfsReadPipe, self).__init__(load_hadoop_cmd() + ['fs', '-cat', path])
def chmod(self, path, permissions, recursive=False):
if recursive:
cmd = load_hadoop_cmd() + ['fs', '-chmod', '-R', permissions, path]
else:
cmd = load_hadoop_cmd() + ['fs', '-chmod', permissions, path]
self.call_check(cmd)
def put(self, local_path, destination):
call_check(load_hadoop_cmd() + ['fs', '-put', local_path, destination])
def put(self, local_path, destination):
self.call_check(load_hadoop_cmd() +
['fs', '-put', local_path, destination])
def touchz(self, path):
call_check(load_hadoop_cmd() + ['fs', '-touchz', path])
def get(self, path, local_destination):
self.call_check(load_hadoop_cmd() +
['fs', '-get', path, local_destination])
def touchz(self, path):
self.call_check(load_hadoop_cmd() + ['fs', '-touchz', path])
def getmerge(self, path, local_destination, new_line=False):
if new_line:
cmd = load_hadoop_cmd() + ['fs', '-getmerge', '-nl', path, local_destination]
else:
cmd = load_hadoop_cmd() + ['fs', '-getmerge', path, local_destination]
call_check(cmd)
def get(self, path, local_destination):
call_check(load_hadoop_cmd() + ['fs', '-get', path, local_destination])
def copy(self, path, destination):
self.call_check(load_hadoop_cmd() + ['fs', '-cp', path, destination])
def chmod(self, path, permissions, recursive=False):
if recursive:
cmd = load_hadoop_cmd() + ['fs', '-chmod', '-R', permissions, path]
else:
cmd = load_hadoop_cmd() + ['fs', '-chmod', permissions, path]
call_check(cmd)
def copy(self, path, destination):
call_check(load_hadoop_cmd() + ['fs', '-cp', path, destination])
