84 lines
2.8 KiB
Python
84 lines
2.8 KiB
Python
"""Onionr - Private P2P Communication.
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BlockCreatorQueue, generate anonvdf blocks in a queue
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"""
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from typing import Callable
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from threading import Thread
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from hashlib import sha3_224
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from os import cpu_count
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import time
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import blockio
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"""
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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"""
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class AlreadyGenerating(Exception): pass # noqa
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class PassToSafeDB:
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def __init__(self, db: 'SafeDB'):
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self.db = db
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self.block_creator_queue = BlockCreatorQueue(self.store_kasten)
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def store_kasten(self, kasten_object):
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self.db.put(kasten_object.id, kasten_object.get_packed())
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def queue_then_store(self, block_data, block_type, ttl, **block_metadata):
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self.block_creator_queue.queue_block(block_data, block_type, ttl, **block_metadata)
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class BlockCreatorQueue:
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def __init__(
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self, callback_func: Callable, *additional_callback_func_args,
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**additional_callback_func_kwargs):
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self.callback_func = callback_func
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self.queued = set()
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self.max_parallel = cpu_count()
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self.additional_callback_func_args = additional_callback_func_args
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self.additional_callback_func_kwargs = additional_callback_func_kwargs
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def block_data_in_queue(self, block_data: bytes) -> bool:
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if sha3_224(block_data).digest() in self.queued:
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return True
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return False
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def queue_block(
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self, block_data, block_type, ttl: int, **block_metadata) -> bytes:
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"""Spawn a thread to make a subprocess to generate a block
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if queue is not full, else wait"""
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digest = sha3_224(block_data).digest()
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def _do_create():
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if digest in self.queued:
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raise AlreadyGenerating()
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self.queued.add(digest)
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while len(self.queued) >= self.max_parallel:
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time.sleep(1)
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result = blockio.subprocgenerate.vdf_block(
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block_data, block_type, ttl, **block_metadata)
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self.queued.remove(digest)
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self.callback_func(
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result,
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*self.additional_callback_func_args,
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**self.additional_callback_func_kwargs)
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Thread(
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target=_do_create, daemon=True,
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name="BlockCreatorQueue block creation").start()
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return digest
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