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# -*- coding: utf-8 -*-
import logging
from os.path import expanduser, abspath
from petrel_client.ceph.ceph import Ceph
from petrel_client.cache.cache import Cache
from petrel_client.dfs.dfs import DFS
from petrel_client.common.config import Config
from petrel_client.common.log import init_log
from petrel_client.common import exception
from petrel_client.common.io_profile import Profiler
from petrel_client.common.io_retry import retry
if issubclass(str, bytes):
def str_to_bytes(s):
return s
else:
import builtins
def str_to_bytes(s):
return builtins.bytes(s, 'utf-8')
LOG = logging.getLogger(__name__)
class MixedClient(object):
def __init__(self, conf_path, **kwargs):
conf_path = abspath(expanduser(conf_path))
config = Config(conf_path)
self._default_config = config.default()
init_log(self._default_config)
LOG.debug('init MixedClient, conf_path %s', conf_path)
Profiler.set_default_conf(self._default_config)
if any(conf.get_boolean('enable_mc') for _, conf in config.items()):
cache_conf = config.get('cache', None) or config.get(
'mc', None) or self._default_config
self._cache = Cache.create(cache_conf, **kwargs)
else:
self._cache = None
self._ceph_dict = {
cluster: Ceph.create(cluster, conf)
for cluster, conf in config.items() if cluster.lower() not in ('dfs', 'cache', 'mc')
}
dfs_conf = config.get('dfs', self._default_config)
self._dfs = DFS.create(dfs_conf)
self._default_cluster = self._default_config.get(
'default_cluster', None)
self._count_disp = self._default_config.get_int('count_disp')
self._get_retry_max = self._default_config.get_int('get_retry_max')
def ceph_parse_uri(self, uri, content):
cluster, bucket, key, enable_cache = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
def io_fn(**kwargs):
client = self._ceph_dict[cluster]
if content is not None:
return client.put_with_info(cluster, bucket, key, content, **kwargs)
else:
return client.get_with_info(cluster, bucket, key, **kwargs)
return enable_cache, io_fn
def cache_parse_uri(self, uri, content):
key = Cache.parse_uri(uri)
def io_fn(**kwargs):
if content is not None: # todo add info
return self._cache.put(key, content), None
else:
return self._cache.get(key), None
return False, io_fn
def dfs_parse_uri(self, uri, content):
file_path = DFS.parse_uri(uri)
def io_fn(**kwargs): # todo add info
if content is not None:
return self._dfs.put(file_path, content, **kwargs), None
else:
return self._dfs.get(file_path, **kwargs), None
return self._dfs.enable_cache(), io_fn
def prepare_io_fn(self, uri, content=None):
try:
return self.ceph_parse_uri(uri, content)
except exception.InvalidS3UriError:
pass
try:
return self.cache_parse_uri(uri, content)
except exception.InvalidMcUriError:
pass
try:
return self.dfs_parse_uri(uri, content)
except exception.InvalidDfsUriError:
pass
raise exception.InvalidUriError(uri)
def _get_with_info(self, uri, **kwargs): # returns (data, info)
no_cache = kwargs.get('no_cache', False)
update_cache = kwargs.get('update_cache', False)
if no_cache and update_cache:
raise ValueError(
'arguments "update_cache" and "no_cache" conflict with each other')
enable_cache, get_fn = self.prepare_io_fn(uri)
enable_cache = self._cache and enable_cache and (not no_cache)
cache_retry_times = 3
cache_value = None
if enable_cache and (not update_cache):
for _ in range(cache_retry_times):
cache_should_retry = False
try:
cache_value = self._cache.get(uri, **kwargs)
except exception.ObjectNotFoundError:
pass
except exception.CacheError as err:
self._cache.log.debug(err)
if isinstance(err, exception.RetriableError):
cache_should_retry = True
except Exception as err:
LOG.error(err)
finally:
if not cache_should_retry:
break
if cache_value is not None:
return cache_value, None
content, info = get_fn(**kwargs)
if enable_cache:
for _ in range(cache_retry_times):
cache_should_retry = False
try:
self._cache.put(uri, content) # todo 如果有异常，是否该忽略？
except exception.CacheError as err:
self._cache.log.debug(err)
if isinstance(err, exception.RetriableError):
cache_should_retry = True
except Exception as err:
LOG.error(err)
finally:
if not cache_should_retry:
break
return content, info
# 所有的异常在此处处理
def get_with_info(self, uri, **kwargs):
@retry('get', exceptions=(Exception,), raises=(exception.ResourceNotFoundError, NotImplementedError), tries=self._get_retry_max)
def do_get_with_info(self, uri, **kwargs):
try:
return self._get_with_info(uri, **kwargs)
except exception.NoSuchBucketError as err:
LOG.warning(err)
except exception.ObjectNotFoundError as err:
LOG.debug(err)
except exception.AccessDeniedError as err:
LOG.warning((err, uri))
return None, None
return do_get_with_info(self, uri, **kwargs)
def create_bucket(self, uri, **kwargs):
cluster, bucket, key, _ = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
if key is not None:
raise exception.InvalidBucketUriError(uri)
return self._ceph_dict[cluster].create_bucket(bucket)
def isdir(self, uri, **kwarg):
try:
cluster, bucket, key, enable_cache = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
isdir_fn = getattr(client, 'isdir')
return isdir_fn(bucket, key)
except exception.InvalidS3UriError:
LOG.error(f'Invalid S3 URI: ${uri}')
raise
except AttributeError:
LOG.warning('please set boto = True to use this feature')
raise
def list(self, uri, **kwarg):
try:
cluster, bucket, key, enable_cache = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
list_fn = getattr(client, 'list')
return list_fn(bucket, key, **kwarg)
except exception.InvalidS3UriError:
LOG.error(f'Invalid S3 URI: ${uri}')
raise
except AttributeError:
LOG.warning('please set boto = True to use this feature')
raise
def get_file_iterator(self, uri):
try:
cluster, bucket, key, enable_cache = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
file_iterator = getattr(client, 'get_file_iterator')
return file_iterator(bucket, key)
except exception.InvalidS3UriError:
LOG.error('only support ceph')
raise
except AttributeError:
LOG.warning('please set boto = True to use this feature')
raise
def put_with_info(self, uri, content, **kwargs):
if isinstance(content, str):
content = str_to_bytes(content)
_enable_cache, put_fn = self.prepare_io_fn(uri, content)
update_cache = self._cache and kwargs.get('update_cache', False)
result, info = put_fn(**kwargs)
if update_cache:
self._cache.put(uri, content)
return result, info
def contains(self, uri):
cluster, bucket, key, _ = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
return client.contains(cluster, bucket, key)
def delete(self, uri):
cluster, bucket, key, _ = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
return client.delete(cluster, bucket, key)
def generate_presigned_url(self, uri, client_method='get_object', expires_in=3600):
cluster, bucket, key, _ = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
return client.generate_presigned_url(cluster, bucket, key, client_method, expires_in)
def generate_presigned_post(self, uri, fields=None, conditions=None, expires_in=3600):
cluster, bucket, key, _ = Ceph.parse_uri(
uri, self._ceph_dict, self._default_cluster)
client = self._ceph_dict[cluster]
return client.generate_presigned_post(cluster, bucket, key, fields, conditions, expires_in)
def set_count_disp(self, count_disp):
Profiler.set_count_disp(count_disp)
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