Python util.mergeFunctionMetadata函数代码示例

def patch_noargs_decorator(decorator):
    def new_decorator(func):
        wrapper = decorator(func)
        wrapper.__wrapped__ = func
        return wrapper
    util.mergeFunctionMetadata(decorator, new_decorator)
    return new_decorator

def onlyOnce(fn):
    'Set up FN to only run once within an interpreter instance'
    def wrap(*args, **kwargs):
        if hasattr(fn, 'called'):
            return
        fn.called = 1
        return fn(*args, **kwargs)
    util.mergeFunctionMetadata(fn, wrap)
    return wrap

def _maybeUnhandled(fn):
    def wrap(self, *args, **kwargs):
        d = fn(self, *args, **kwargs)
        if self._start_unhandled_deferreds is not None:
            self._start_unhandled_deferreds.append(d)
        return d
    wrap.__wrapped__ = fn
    twutil.mergeFunctionMetadata(fn, wrap)
    return wrap

 def _f(f):
     def g(*args, **kw):
         _close_db()
         try:
             ret = f(*args, **kw)
         finally:
             _close_db()
         return ret
     mergeFunctionMetadata(f, g)
     return g

 def _f(f):
     def g(self, *args, **kw):
         if not hasattr(self, 'identify_successful'):
             raise managementprotocol.InternalServerError('no identify_successful attribute found')
         elif not isinstance(self.identify_successful, bool):
             raise managementprotocol.InternalServerError('identify_successful attribute not boolean')
         elif not self.identify_successful:
             raise managementprotocol.ProtocolStateError('request requires successful Identify')
         else:
             return f(self, *args, **kw)
         
     mergeFunctionMetadata(f, g)
     return g

    def _f(f):
        def g(*args, **kw):
            starttime = datetime.datetime.utcnow()

            dbase = database
            if dbase is None:
                raise Exception('dbase is None')
                
            _transact_begin_log_helper('@untransact', f, dbase)
            if (dbase is not None) and hasattr(dbase, 'store') and (dbase.store is not None):
                # hasattr + store check is to fix #621, this is also an API issue with rdf.py
                t = dbase.begin_untransaction()
            else:
                t = None

            global toplevel_transaction

            # Log transact locktime here if active
            if t is not None:
                # XXX: There is no sensible date value to show here,
                # because we are not actually logging anything for
                # current untransaction: we log the locktime of the
                # toplevel transaction which is committed here. Using
                # current time as both timestamps for now.
                _transact_end_log_helper('@transact (in untransact)', toplevel_transaction, dbase, True, datetime.datetime.utcnow(), datetime.datetime.utcnow(), t.get_txn_locked_time(), TRANSACT_LOCK_TIME_WARNING_LIMIT, untransact_point=f)

            try:
                ret = f(*args, **kw)
            except:
                t_locked_time = None
                if t is not None:
                    t_locked_time = t.get_locked_time()
                    t.commit()
                endtime = datetime.datetime.utcnow()
                _transact_end_log_helper('@untransact', f, dbase, False, starttime, endtime, t_locked_time, UNTRANSACT_LOCK_TIME_WARNING_LIMIT)
                raise

            t_locked_time = None
            if t is not None:
                t_locked_time = t.get_locked_time()
                t.commit()
            endtime = datetime.datetime.utcnow()
            _transact_end_log_helper('@untransact', f, dbase, True, starttime, endtime, t_locked_time, UNTRANSACT_LOCK_TIME_WARNING_LIMIT)
                
            return ret

        mergeFunctionMetadata(f, g)
        return g

def deferredGenerator(f):
    """
    deferredGenerator and waitForDeferred help you write L{Deferred}-using code
    that looks like a regular sequential function. If your code has a minimum
    requirement of Python 2.5, consider the use of L{inlineCallbacks} instead,
    which can accomplish the same thing in a more concise manner.

    There are two important functions involved: L{waitForDeferred}, and
    L{deferredGenerator}.  They are used together, like this::

        def thingummy():
            thing = waitForDeferred(makeSomeRequestResultingInDeferred())
            yield thing
            thing = thing.getResult()
            print thing #the result! hoorj!
        thingummy = deferredGenerator(thingummy)

    L{waitForDeferred} returns something that you should immediately yield; when
    your generator is resumed, calling C{thing.getResult()} will either give you
    the result of the L{Deferred} if it was a success, or raise an exception if it
    was a failure.  Calling C{getResult} is B{absolutely mandatory}.  If you do
    not call it, I{your program will not work}.

    L{deferredGenerator} takes one of these waitForDeferred-using generator
    functions and converts it into a function that returns a L{Deferred}. The
    result of the L{Deferred} will be the last value that your generator yielded
    unless the last value is a L{waitForDeferred} instance, in which case the
    result will be C{None}.  If the function raises an unhandled exception, the
    L{Deferred} will errback instead.  Remember that C{return result} won't work;
    use C{yield result; return} in place of that.

    Note that not yielding anything from your generator will make the L{Deferred}
    result in C{None}. Yielding a L{Deferred} from your generator is also an error
    condition; always yield C{waitForDeferred(d)} instead.

    The L{Deferred} returned from your deferred generator may also errback if your
    generator raised an exception.  For example::

        def thingummy():
            thing = waitForDeferred(makeSomeRequestResultingInDeferred())
            yield thing
            thing = thing.getResult()
            if thing == 'I love Twisted':
                # will become the result of the Deferred
                yield 'TWISTED IS GREAT!'
                return
            else:
                # will trigger an errback
                raise Exception('DESTROY ALL LIFE')
        thingummy = deferredGenerator(thingummy)

    Put succinctly, these functions connect deferred-using code with this 'fake
    blocking' style in both directions: L{waitForDeferred} converts from a
    L{Deferred} to the 'blocking' style, and L{deferredGenerator} converts from the
    'blocking' style to a L{Deferred}.
    """

    def unwindGenerator(*args, **kwargs):
        return _deferGenerator(f(*args, **kwargs), Deferred())
    return mergeFunctionMetadata(f, unwindGenerator)

def fastInline(f):
    """This decorator is mostly equivalent to defer.inlineCallbacks except
    that speed is the primary priority. while inlineCallbacks checks a few
    different things to make sure you're doing it properly, this method simply
    assumes you are.

    changes:
     * this decorator no longer checks that you're wrapping a generator
     * this decorator no longer checks that _DefGen_Return is thrown from the
       decoratored generator only
     * the generator loop no longer double checks that you're yielding
       deferreds and simply assumes it, catching the exception if you aren't
     * the generator stops calling isinstance for logic - profiling reveals
       that isinstance consumes a nontrivial amount of computing power during
       heavy use

    You can force this method to behave exactly like defer.inlineCallbacks by
    providing the FORCE_STANDARD_INLINE_CALLBACKS environment variable
    """
    def unwind(*args, **kwargs):
        try:
            gen = f(*args, **kwargs)
        except defer._DefGen_Return:  # pylint: disable=W0212
            raise TypeError("defer.returnValue used from non-generator")
        return _inlineCallbacks(None, None, gen, defer.Deferred())
    return mergeFunctionMetadata(f, unwind)

def goodDecorator(fn):
    """
    Decorate a function and preserve the original name.
    """
    def nameCollision(*args, **kwargs):
        return fn(*args, **kwargs)
    return mergeFunctionMetadata(fn, nameCollision)

    def decorator(function):

        def decorated(*a, **kw):
            with context_factory(*args, **kwargs):
                return function(*a, **kw)

        return mergeFunctionMetadata(function, decorated)

def fireWhenDoneFunc(d, f):
    """Returns closure that when called calls f and then callbacks d.
    """
    def newf(*args, **kw):
        rtn = f(*args, **kw)
        d.callback('')
        return rtn
    return util.mergeFunctionMetadata(f, newf)

def make_it_green(f):
    def unwindGenerator(*args, **kwargs):
        g = greenlet(f)
        # Похоже, что такой тупой ход парента не меняет.
        # Также похоже, что и без него работает, оставляя выполнение в текущем гринлете.
        #g.parent = main
        return _inline_greens(None, g, (args, kwargs), defer.Deferred())
    return mergeFunctionMetadata(f, unwindGenerator)

    def __getattr__(self, name):
        maybe_method = getattr(self._transport, name)
        if not callable(maybe_method):
            return maybe_method

        def defer_it(*args, **kwargs):
            return defer.maybeDeferred(maybe_method, *args, **kwargs)

        return mergeFunctionMetadata(maybe_method, defer_it)

 def _deco(meth):
     methodName = meth.__name__
     def _soapMethod(self, *args, **kwargs):
         def _parse(body):
             return body[0]
         request = getattr(NS, methodName)
         request, parser = meth(self, request, *args, **kwargs)
         return self.call(_uj(_nsuri(NS), methodName), request).addCallback(_parse).addCallback(parser)
     return util.mergeFunctionMetadata(meth, _soapMethod)

def atSpecifiedTime(when, func):
    def inner(*a, **kw):
        orig = time.time
        time.time = lambda: when
        try:
            return func(*a, **kw)
        finally:
            time.time = orig
    return util.mergeFunctionMetadata(func, inner)