def open(self, *args, **kwargs):
if self.context_preserved:
_request_ctx_stack.pop()
self.context_preserved = False
kwargs.setdefault('environ_overrides', {}) \
['flask._preserve_context'] = self.preserve_context
old = _request_ctx_stack.top
try:
return Client.open(self, *args, **kwargs)
finally:
self.context_preserved = _request_ctx_stack.top is not old
"""
An important caveat to this is that any operation relate to database must be MANUALLY committed, otherwise may result
potential operation lost.
"""
def future(*args, **kwargs):
rv = _request_ctx_stack.push(
request_ctx
) if not _request_ctx_stack.top and request_ctx else None
result = None
try:
result = method(*args, **kwargs)
except Exception, ex:
raise ex
finally:
if rv:
_request_ctx_stack.pop()
try:
db.session.remove()
except Exception, ex:
print ex
if index is None:
return result
else:
return dict(index=index, data=result)
return future
def pool_executor(executor):
if executor == CONCURRENT_EXECUTOR_THREAD:
return futures.ThreadPoolExecutor
def __exit__(self, exc_type, exc_value, tb):
self.preserve_context = False
if self.context_preserved:
_request_ctx_stack.pop()
from flask.globals import _request_ctx_stack
from functools import partial
def _lookup_req_object(name):
top = _request_ctx_stack.top
if top is None:
raise RuntimeError('没有')
return getattr(top, name)
class foo(object):
def __init__(self):
self.xxx = 123
self.kkk = 345
req = partial(_lookup_req_object, 'xxx')
XXX = partial(_lookup_req_object, 'kkk')
_request_ctx_stack.push(foo())
v1 = req()
print(v1)
v2 = XXX()
print(v2)
_request_ctx_stack.pop() #移除
