本文整理匯總了Python中sqlalchemy.pool._refs方法的典型用法代碼示例。如果您正苦於以下問題：Python pool._refs方法的具體用法？Python pool._refs怎麽用？Python pool._refs使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類sqlalchemy.pool的用法示例。
在下文中一共展示了pool._refs方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: _assert_no_stray_pool_connections
# 需要導入模塊: from sqlalchemy import pool [as 別名]
# 或者: from sqlalchemy.pool import _refs [as 別名]
def _assert_no_stray_pool_connections():
global _STRAY_CONNECTION_FAILURES
# lazy gc on cPython means "do nothing." pool connections
# shouldn't be in cycles, should go away.
testutil.lazy_gc()
# however, once in awhile, on an EC2 machine usually,
# there's a ref in there. usually just one.
if pool._refs:
# OK, let's be somewhat forgiving.
_STRAY_CONNECTION_FAILURES += 1
print("Encountered a stray connection in test cleanup: %s"
% str(pool._refs))
# then do a real GC sweep. We shouldn't even be here
# so a single sweep should really be doing it, otherwise
# there's probably a real unreachable cycle somewhere.
testutil.gc_collect()
# if we've already had two of these occurrences, or
# after a hard gc sweep we still have pool._refs?!
# now we have to raise.
if pool._refs:
err = str(pool._refs)
# but clean out the pool refs collection directly,
# reset the counter,
# so the error doesn't at least keep happening.
pool._refs.clear()
_STRAY_CONNECTION_FAILURES = 0
assert False, "Stray connection refused to leave "\
"after gc.collect(): %s" % err
elif _STRAY_CONNECTION_FAILURES > 10:
assert False, "Encountered more than 10 stray connections"
_STRAY_CONNECTION_FAILURES = 0 示例2: _assert_no_stray_pool_connections
# 需要導入模塊: from sqlalchemy import pool [as 別名]
# 或者: from sqlalchemy.pool import _refs [as 別名]
def _assert_no_stray_pool_connections():
global _STRAY_CONNECTION_FAILURES
# lazy gc on cPython means "do nothing." pool connections
# shouldn't be in cycles, should go away.
testutil.lazy_gc()
# however, once in awhile, on an EC2 machine usually,
# there's a ref in there. usually just one.
if pool._refs:
# OK, let's be somewhat forgiving.
_STRAY_CONNECTION_FAILURES += 1
print("Encountered a stray connection in test cleanup: %s"
% str(pool._refs))
# then do a real GC sweep. We shouldn't even be here
# so a single sweep should really be doing it, otherwise
# there's probably a real unreachable cycle somewhere.
testutil.gc_collect()
# if we've already had two of these occurrences, or
# after a hard gc sweep we still have pool._refs?!
# now we have to raise.
if pool._refs:
err = str(pool._refs)
# but clean out the pool refs collection directly,
# reset the counter,
# so the error doesn't at least keep happening.
pool._refs.clear()
_STRAY_CONNECTION_FAILURES = 0
warnings.warn(
"Stray connection refused to leave "
"after gc.collect(): %s" % err)
elif _STRAY_CONNECTION_FAILURES > 10:
assert False, "Encountered more than 10 stray connections"
_STRAY_CONNECTION_FAILURES = 0 示例3: _assert_no_stray_pool_connections
# 需要導入模塊: from sqlalchemy import pool [as 別名]
# 或者: from sqlalchemy.pool import _refs [as 別名]
def _assert_no_stray_pool_connections():
global _STRAY_CONNECTION_FAILURES
# lazy gc on cPython means "do nothing." pool connections
# shouldn't be in cycles, should go away.
testutil.lazy_gc()
# however, once in awhile, on an EC2 machine usually,
# there's a ref in there. usually just one.
if pool._refs:
# OK, let's be somewhat forgiving. Increment a counter,
# we'll allow a couple of these at most.
_STRAY_CONNECTION_FAILURES += 1
print("Encountered a stray connection in test cleanup: %s"
% str(pool._refs))
# then do a real GC sweep. We shouldn't even be here
# so a single sweep should really be doing it, otherwise
# there's probably a real unreachable cycle somewhere.
testutil.gc_collect()
# if we've already had two of these occurrences, or
# after a hard gc sweep we still have pool._refs?!
# now we have to raise.
if _STRAY_CONNECTION_FAILURES >= 2 or pool._refs:
err = str(pool._refs)
# but clean out the pool refs collection directly,
# reset the counter,
# so the error doesn't at least keep happening.
pool._refs.clear()
_STRAY_CONNECTION_FAILURES = 0
assert False, "Stray conections in cleanup: %s" % err