129 lines
4.6 KiB
Python
129 lines
4.6 KiB
Python
# Copyright 2016 Intel corporation
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# Copyright 2016 Sam Yaple
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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 contextlib import closing
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from contextlib import contextmanager
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import sqlite3
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from ekko.manifest import drivers
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from ekko.manifest import structure
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class SQLiteManifest(drivers.BaseManifest):
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def initialize(self):
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with self.get_conn() as conn:
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with closing(conn.cursor()) as cur:
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cur.executescript("""
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CREATE TABLE metadata (
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key TEXT PRIMARY KEY,
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value TEXT
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);
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CREATE TABLE backupsets (
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id INTEGER PRIMARY KEY,
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backupset_id BLOB
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);
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CREATE TABLE segments (
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incremental INTEGER,
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segment INTEGER PRIMARY KEY,
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compression TINYINT,
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encryption TINYINT,
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segment_hash BLOB,
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backupset_id INTEGER,
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FOREIGN KEY(backupset_id) REFERENCES backupsets(id)
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);
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""")
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conn.commit()
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@contextmanager
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def get_conn(self):
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if not self.conn:
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self.conn = sqlite3.connect(self.manifest_file)
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conn = self.conn
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self.conn = None
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yield conn
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conn.rollback()
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self.conn = conn
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def get_metadata(self):
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with self.get_conn() as conn:
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with closing(conn.cursor()) as cur:
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cur.execute("SELECT * FROM metadata")
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metadata = dict(cur.fetchall())
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cur.execute("SELECT * FROM backupsets")
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backupsets = [b[1] for b in cur.fetchall()]
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return structure.Metadata(
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incremental=metadata['incremental'],
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size_of_disk=metadata['size_of_disk'],
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segment_size=metadata['segment_size'],
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timestamp=metadata['timestamp'],
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backupset_id=backupsets[-1],
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backupsets=backupsets
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)
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def get_segments(self, metadata):
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with self.get_conn() as conn:
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with closing(conn.cursor()) as cur:
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cur.execute("SELECT * FROM segments")
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for result in cur:
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yield structure.Segment(
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backupset_id=metadata.backupsets[result[5]],
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incremental=result[0],
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segment=result[1],
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compression=result[2],
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encryption=result[3],
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segment_hash=str(result[4])
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)
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def put_segments(self, segments, metadata):
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with self.get_conn() as conn:
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with closing(conn.cursor()) as cur:
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for segment in segments:
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cur.execute(
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"INSERT INTO segments VALUES (?, ?, ?, ?, ?, ?)",
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(
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segment.incremental,
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segment.segment,
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segment.compression,
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segment.encryption,
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buffer(segment.segment_hash),
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metadata.backupsets.index(segment.backupset_id)
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)
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)
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conn.commit()
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def put_metadata(self, metadata):
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with self.get_conn() as conn:
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with closing(conn.cursor()) as cur:
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cur.executemany(
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"INSERT OR REPLACE INTO metadata VALUES (?, ?)",
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[
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('incremental', metadata.incremental),
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('segment_size', metadata.segment_size),
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('size_of_disk', metadata.size_of_disk),
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('timestamp', metadata.timestamp)
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]
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)
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for i, v in enumerate(metadata.backupsets):
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cur.execute(
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"INSERT INTO backupsets VALUES (?, ?)",
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(i, buffer(v))
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)
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conn.commit()
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