def __init__(self, env):
super().__init__()
self.env = env
self.coin = env.coin
self.logger.info('switching current directory to {}'.format(
env.db_dir))
os.chdir(env.db_dir)
self.db_class = db_class(self.env.db_engine)
self.logger.info('using {} for DB backend'.format(self.env.db_engine))
self.utxo_db = None
self.open_dbs()
self.clean_db()
self.logger.info('reorg limit is {:,d} blocks'.format(
self.env.reorg_limit))
self.headers_file = util.LogicalFile('meta/headers', 2, 16000000)
self.tx_counts_file = util.LogicalFile('meta/txcounts', 2, 2000000)
self.hashes_file = util.LogicalFile('meta/hashes', 4, 16000000)
# tx_counts[N] has the cumulative number of txs at the end of
# height N. So tx_counts[0] is 1 - the genesis coinbase
size = (self.db_height + 1) * 4
tx_counts = self.tx_counts_file.read(0, size)
assert len(tx_counts) == size
self.tx_counts = array.array('I', tx_counts)
if self.tx_counts:
assert self.db_tx_count == self.tx_counts[-1]
else:
assert self.db_tx_count == 0
def db(tmpdir, request):
cwd = os.getcwd()
os.chdir(str(tmpdir))
db = db_class(request.param)("db", False)
yield db
os.chdir(cwd)
db.close()
def db(tmpdir, request):
cwd = os.getcwd()
os.chdir(str(tmpdir))
db = db_class(request.param)("db", False)
yield db
os.chdir(cwd)
# Make sure all the locks and handles are closed
del db
gc.collect()
def __init__(self, env):
self.logger = logging.getLogger(self.__class__.__name__)
self.env = env
self.coin = env.coin
# Setup block header size handlers
if self.coin.STATIC_BLOCK_HEADERS:
self.header_offset = self.coin.static_header_offset
self.header_len = self.coin.static_header_len
else:
self.header_offset = self.dynamic_header_offset
self.header_len = self.dynamic_header_len
self.logger.info('switching current directory to {}'.format(
env.db_dir))
os.chdir(env.db_dir)
self.db_class = db_class(self.env.db_engine)
self.logger.info('using {} for DB backend'.format(self.env.db_engine))
# For history compaction
self.max_hist_row_entries = 12500
self.utxo_db = None
self.hist_db = None
self.eventlog_db = None # hashY+flush_id => [(tx_num, log_index), ]
self.hashY_db = None # blockHash => [hashY, ]
self.open_dbs()
self.clean_db()
self.logger.info('reorg limit is {:,d} blocks'.format(
self.env.reorg_limit))
self.headers_file = util.LogicalFile('meta/headers', 2, 16000000)
self.tx_counts_file = util.LogicalFile('meta/txcounts', 2, 2000000)
self.hashes_file = util.LogicalFile('meta/hashes', 4, 16000000)
if not self.coin.STATIC_BLOCK_HEADERS:
self.headers_offsets_file = util.LogicalFile(
'meta/headers_offsets', 2, 16000000)
# Write the offset of the genesis block
if self.headers_offsets_file.read(0, 8) != b'\x00' * 8:
self.headers_offsets_file.write(0, b'\x00' * 8)
# tx_counts[N] has the cumulative number of txs at the end of
# height N. So tx_counts[0] is 1 - the genesis coinbase
size = (self.db_height + 1) * 4
tx_counts = self.tx_counts_file.read(0, size)
assert len(tx_counts) == size
self.tx_counts = array.array('I', tx_counts)
if self.tx_counts:
assert self.db_tx_count == self.tx_counts[-1]
else:
assert self.db_tx_count == 0
def __init__(self, env):
super().__init__()
self.env = env
self.coin = env.coin
# Setup block header size handlers
if self.coin.STATIC_BLOCK_HEADERS:
self.header_offset = self.coin.static_header_offset
self.header_len = self.coin.static_header_len
else:
self.header_offset = self.dynamic_header_offset
self.header_len = self.dynamic_header_len
self.logger.info('switching current directory to {}'.format(
env.db_dir))
os.chdir(env.db_dir)
self.db_class = db_class(self.env.db_engine)
self.logger.info('using {} for DB backend'.format(self.env.db_engine))
# For history compaction
self.max_hist_row_entries = 12500
self.utxo_db = None
self.open_dbs()
self.clean_db()
self.logger.info('reorg limit is {:,d} blocks'.format(
self.env.reorg_limit))
#保存区块头信息，格式=header的前后相连
self.headers_file = util.LogicalFile('meta/headers', 2, 16000000)
#记录区块的增量交易数量
self.tx_counts_file = util.LogicalFile('meta/txcounts', 2, 2000000)
self.hashes_file = util.LogicalFile('meta/hashes', 4, 16000000)
if not self.coin.STATIC_BLOCK_HEADERS:
#保存区块头偏移信息(如果区块头长度不固定)，结构为数据前后相连，可以通过height直接计算位置
self.headers_offsets_file = util.LogicalFile(
'meta/headers_offsets', 2, 16000000)
# Write the offset of the genesis block
if self.headers_offsets_file.read(0, 8) != b'\x00' * 8:
self.headers_offsets_file.write(0, b'\x00' * 8)
# tx_counts[N] has the cumulative number of txs at the end of
# height N. So tx_counts[0] is 1 - the genesis coinbase
size = (self.db_height + 1) * 4
tx_counts = self.tx_counts_file.read(0, size)
assert len(tx_counts) == size
self.tx_counts = array.array('I', tx_counts)
if self.tx_counts:
assert self.db_tx_count == self.tx_counts[-1]
else:
assert self.db_tx_count == 0
def test_close(db):
db.put(b"a", b"b")
db.close()
db = db_class(db.__class__.__name__)("db", False)
assert db.get(b"a") == b"b"
