def test_LogicalFile(tmpdir):
prefix = os.path.join(tmpdir, 'log')
L = util.LogicalFile(prefix, 2, 6)
with pytest.raises(FileNotFoundError):
L.open_file(0, create=False)
# Check L.open creates a file
with L.open_file(8, create=True) as f:
pass
with util.open_file(prefix + '01') as f:
pass
L.write(0, b'987')
assert L.read(0, -1) == b'987'
assert L.read(0, 4) == b'987'
assert L.read(1, 1) == b'8'
L.write(0, b'01234567890')
assert L.read(0, -1) == b'01234567890'
assert L.read(5, -1) == b'567890'
with util.open_file(prefix + '01') as f:
assert f.read(-1) == b'67890'
# Test file boundary
L.write(0, b'957' * 6)
assert L.read(0, -1) == b'957' * 6
def test_open_fns(tmpdir):
tmpfile = os.path.join(tmpdir, 'file1')
with pytest.raises(FileNotFoundError):
util.open_file(tmpfile)
with util.open_file(tmpfile, create=True) as f:
f.write(b'56')
with util.open_file(tmpfile) as f:
assert f.read(3) == b'56'
# Test open_truncate truncates and creates
with util.open_truncate(tmpfile) as f:
assert f.read(3) == b''
tmpfile = os.path.join(tmpdir, 'file2')
with util.open_truncate(tmpfile) as f:
assert f.read(3) == b''
async def _open_dbs(self, for_sync: bool, compacting: bool):
assert self.utxo_db is None
# First UTXO DB
self.utxo_db = self.db_class('utxo', for_sync)
if self.utxo_db.is_new:
self.logger.info('created new database')
self.logger.info('creating metadata directory')
os.mkdir('meta')
with util.open_file('COIN', create=True) as f:
f.write(f'ElectrumX databases and metadata for '
f'{self.coin.NAME} {self.coin.NET}'.encode())
if not self.coin.STATIC_BLOCK_HEADERS:
self.headers_offsets_file.write(0, b'\0\0\0\0\0\0\0\0')
else:
self.logger.info(f'opened UTXO DB (for sync: {for_sync})')
self.read_utxo_state()
# Then history DB
self.utxo_flush_count = self.history.open_db(self.db_class, for_sync,
self.utxo_flush_count,
compacting)
self.clear_excess_undo_info()
# Read TX counts (requires meta directory)
await self._read_tx_counts()
def open_dbs(self):
'''Open the databases. If already open they are closed and re-opened.
When syncing we want to reserve a lot of open files for the
synchronization. When serving clients we want the open files for
serving network connections.
'''
def log_reason(message, is_for_sync):
reason = 'sync' if is_for_sync else 'serving'
self.logger.info('{} for {}'.format(message, reason))
# Assume we're serving until we find out otherwise
for for_sync in [False, True]:
if self.utxo_db:
if self.utxo_db.for_sync == for_sync:
return
log_reason('closing DB to re-open', for_sync)
self.utxo_db.close()
self.history.close_db()
# Open DB and metadata files. Record some of its state.
self.utxo_db = self.db_class('utxo', for_sync)
if self.utxo_db.is_new:
self.logger.info('created new database')
self.logger.info('creating metadata directory')
os.mkdir('meta')
with util.open_file('COIN', create=True) as f:
f.write(
'ElectrumX databases and metadata for {} {}'.format(
self.coin.NAME, self.coin.NET).encode())
else:
log_reason('opened DB', self.utxo_db.for_sync)
self.read_utxo_state()
if self.first_sync == self.utxo_db.for_sync:
break
# Open history DB, clear excess history
self.utxo_flush_count = self.history.open_db(self.db_class, for_sync,
self.utxo_flush_count)
self.clear_excess_undo_info()
self.logger.info('DB version: {:d}'.format(self.db_version))
self.logger.info('coin: {}'.format(self.coin.NAME))
self.logger.info('network: {}'.format(self.coin.NET))
self.logger.info('height: {:,d}'.format(self.db_height))
self.logger.info('tip: {}'.format(hash_to_str(self.db_tip)))
self.logger.info('tx count: {:,d}'.format(self.db_tx_count))
if self.first_sync:
self.logger.info('sync time so far: {}'.format(
util.formatted_time(self.wall_time)))
def read_raw_block(self, height):
'''Returns a raw block read from disk. Raises FileNotFoundError
if the block isn't on-disk.'''
with util.open_file(self.raw_block_path(height)) as f:
return f.read(-1)
def __enter__(self):
self.block_file = open_file(self.filename(self.hex_hash, self.height))
self.header = self._read(80)
return self
