Onionr/src/communicatorutils/uploadblocks/sessionmanager.py

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"""
Onionr - Private P2P Communication
Manager for upload 'sessions'
"""
from __future__ import annotations
"""
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/>.
"""
from typing import Iterable, Union
from onionrutils import bytesconverter
from onionrutils import localcommand
from etc import onionrvalues
from etc import waitforsetvar
from utils import reconstructhash
from . import session
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:Iterable=None):
#self._too_many: TooMany = None
if old_sessions is None:
self.sessions = []
else:
self.sessions = old_session
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 not session_or_block 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
def get_session(self, block_hash: Union(str, bytes))->session.UploadSession:
block_hash = reconstructhash.deconstruct_hash(bytesconverter.bytes_to_str(block_hash))
for session in self.sessions:
if session.block_hash == block_hash: return session
raise KeyError
def clean_session(self, specific_session: Union[str, UploadSession]=None):
comm_inst: OnionrCommunicatorDaemon = self._too_many.get_by_string("OnionrCommunicatorDaemon")
sessions_to_delete = []
if comm_inst.getUptime() < 120: return
onlinePeerCount = len(comm_inst.onlinePeers)
# If we have no online peers right now,
if onlinePeerCount == 0: return
for session in self.sessions:
# if over 50% of peers that were online for a session have become unavailable, don't kill sessions
if session.total_success_count > onlinePeerCount:
if onlinePeerCount / session.total_success_count >= 0.5: return
# Clean sessions if they have uploaded to enough online peers
if session.total_success_count <= 0: continue
if (session.total_success_count / onlinePeerCount) >= onionrvalues.MIN_BLOCK_UPLOAD_PEER_PERCENT:
sessions_to_delete.append(session)
for session in sessions_to_delete:
self.sessions.remove(session)
# TODO cleanup to one round of search
# Remove the blocks from the sessions, upload list, and waitforshare list
try:
comm_inst.blocksToUpload.remove(reconstructhash.reconstruct_hash(session.block_hash))
except ValueError:
pass
try:
comm_inst.blocksToUpload.remove(session.block_hash)
except ValueError:
pass
2019-09-22 02:54:49 +00:00
localcommand.local_command('waitforshare/{session.block_hash}')