134 lines
4.3 KiB
Python
134 lines
4.3 KiB
Python
# (c) Copyright 2014,2015 Hewlett-Packard Development Company, L.P.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from freezer.storage import base
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from freezer.utils import utils
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class FsLikeStorage(base.Storage):
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DEFAULT_CHUNK_SIZE = 10000000
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def __init__(self, storage_directory, work_dir,
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chunk_size=DEFAULT_CHUNK_SIZE, skip_prepare=False):
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self.storage_directory = storage_directory
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self.chunk_size = chunk_size
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super(FsLikeStorage, self).__init__(work_dir,
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skip_prepare=skip_prepare)
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def backup_to_file_path(self, backup):
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"""
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:param backup:
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:type backup: freezer.storage.base.Backup
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:return:
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"""
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return utils.path_join(self._zero_backup_dir(backup), backup)
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def _zero_backup_dir(self, backup):
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"""
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:param backup:
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:type backup: freezer.storage.base.Backup
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:return:
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"""
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return utils.path_join(self.storage_directory,
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backup.hostname_backup_name,
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backup.full_backup.timestamp)
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def prepare(self):
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self.create_dirs(self.storage_directory)
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def info(self):
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pass
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def meta_file_abs_path(self, backup):
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zero_backup = self._zero_backup_dir(backup)
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return utils.path_join(zero_backup, backup.tar())
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def upload_meta_file(self, backup, meta_file):
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"""
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:param backup:
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:type backup: freezer.storage.base.Backup
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:param meta_file:
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:return:
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"""
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zero_backup = self._zero_backup_dir(backup)
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to_path = utils.path_join(zero_backup, backup.tar())
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self.put_file(meta_file, to_path)
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def find_all(self, hostname_backup_name):
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backups = []
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backup_dir = utils.path_join(self.storage_directory,
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hostname_backup_name)
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utils.create_dir_tree(backup_dir)
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timestamps = self.listdir(backup_dir)
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for timestamp in timestamps:
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increments = \
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self.listdir(utils.path_join(backup_dir, timestamp))
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backups.extend(base.Backup.parse_backups(increments, self))
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return backups
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def remove_backup(self, backup):
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"""
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:type backup: freezer.storage.base.Backup
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:return:
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"""
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self.rmtree(self._zero_backup_dir(backup))
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def write_backup(self, rich_queue, backup):
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"""
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Stores backup in storage
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:type rich_queue: freezer.streaming.RichQueue
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:type backup: freezer.storage.base.Backup
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"""
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filename = self.backup_to_file_path(backup)
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if backup.level == 0:
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self.create_dirs(self._zero_backup_dir(backup))
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with self.open(filename, mode='wb') as b_file:
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for message in rich_queue.get_messages():
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b_file.write(message)
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def backup_blocks(self, backup):
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"""
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:param backup:
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:type backup: freezer.storage.base.Backup
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:return:
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"""
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filename = self.backup_to_file_path(backup)
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with self.open(filename, 'rb') as backup_file:
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while True:
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chunk = backup_file.read(self.chunk_size)
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if chunk == '':
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break
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if len(chunk):
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yield chunk
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def listdir(self, directory):
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raise NotImplementedError("Should have implemented this")
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def put_file(self, from_path, to_path):
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raise NotImplementedError("Should have implemented this")
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def create_dirs(self, path):
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raise NotImplementedError("Should have implemented this")
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def rmtree(self, path):
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raise NotImplementedError("Should have implemented this")
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def open(self, filename, mode):
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raise NotImplementedError("Should have implemented this")
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