Onionr/src/communicatorutils/uploadblocks/sessionmanager.py

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"""Onionr - Private P2P Communication.
Manager for upload 'sessions'
"""
from typing import List, Union, TYPE_CHECKING
if TYPE_CHECKING:
from deadsimplekv import DeadSimpleKV
from session import UploadSession
from onionrutils import bytesconverter
from etc import onionrvalues
from utils import reconstructhash
from . import session
"""
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
class BlockUploadSessionManager:
"""Holds block UploadSession instances.
Optionally accepts iterable of sessions to added on init
Arguments: old_session: iterable of old UploadSession objects
"""
def __init__(self, old_sessions: List = None):
if old_sessions is None:
self.sessions = []
else:
self.sessions = old_sessions
def add_session(self,
session_or_block: Union[str,
bytes,
session.UploadSession
]
) -> session.UploadSession:
"""Create (or add existing) block upload session.
from a str/bytes block hex hash, existing UploadSession
"""
if isinstance(session_or_block, session.UploadSession):
if session_or_block not in self.sessions:
self.sessions.append(session_or_block)
return session_or_block
try:
return self.get_session(session_or_block)
except KeyError:
pass
# convert bytes hash to str
if isinstance(session_or_block, bytes):
session_or_block = bytesconverter.bytes_to_str(session_or_block)
# intentionally not elif
if isinstance(session_or_block, str):
new_session = session.UploadSession(session_or_block)
self.sessions.append(new_session)
return new_session
raise ValueError
def get_session(self,
block_hash: Union[str, bytes]
) -> session.UploadSession:
block_hash = reconstructhash.deconstruct_hash(
bytesconverter.bytes_to_str(block_hash))
for sess in self.sessions:
if sess.block_hash == block_hash:
return sess
raise KeyError
def clean_session(self,
specific_session: Union[str, 'UploadSession'] = None):
comm_inst: 'OnionrCommunicatorDaemon' # type: ignore
comm_inst = self._too_many.get_by_string( # pylint: disable=E1101 type: ignore
"OnionrCommunicatorDaemon")
kv: "DeadSimpleKV" = comm_inst.shared_state.get_by_string(
"DeadSimpleKV")
sessions_to_delete = []
if comm_inst.getUptime() < 120:
return
onlinePeerCount = len(kv.get('onlinePeers'))
# If we have no online peers right now,
if onlinePeerCount == 0:
return
for sess in self.sessions:
# if over 50% of peers that were online for a session have
# become unavailable, don't kill sessions
if sess.total_success_count > onlinePeerCount:
if onlinePeerCount / sess.total_success_count >= 0.5:
return
# Clean sessions if they have uploaded to enough online peers
if sess.total_success_count <= 0:
continue
if (sess.total_success_count / onlinePeerCount) >= onionrvalues.MIN_BLOCK_UPLOAD_PEER_PERCENT:
sessions_to_delete.append(sess)
for sess in sessions_to_delete:
try:
self.sessions.remove(session)
except ValueError:
pass
# TODO cleanup to one round of search
# Remove the blocks from the sessions, upload list,
# and waitforshare list
try:
kv.get('blocksToUpload').remove(
reconstructhash.reconstruct_hash(sess.block_hash))
except ValueError:
pass
try:
kv.get('blocksToUpload').remove(sess.block_hash)
except ValueError:
pass