Files @ 9855b31d033b
Branch filter:

Location: kallithea/rhodecode/lib/vcs/utils/lazy.py - annotation

Mads Kiilerich
pullrequests: fix changesets ordering being reversed when creating new pull requests

41b4edf77b5b tried to make the displayed order of changeset consistent: The
topmost is always the latest.

That did however also reverse the ordering of the changesets sent back in the
post when used in the pull request creation form. Displaying the pull request
later on would reverse it again and thus show it in the 'wrong' order.

We now undo that reversing when creating the pull requests, and the stored data
will thus be the same as before.
class _Missing(object):

    def __repr__(self):
        return 'no value'

    def __reduce__(self):
        return '_missing'

_missing = _Missing()


class LazyProperty(object):
    """
    Decorator for easier creation of ``property`` from potentially expensive to
    calculate attribute of the class.

    Usage::

      class Foo(object):
          @LazyProperty
          def bar(self):
              print 'Calculating self._bar'
              return 42

    Taken from http://blog.pythonisito.com/2008/08/lazy-descriptors.html and
    used widely.
    """

    def __init__(self, func):
        self._func = func
        self.__module__ = func.__module__
        self.__name__ = func.__name__
        self.__doc__ = func.__doc__

    def __get__(self, obj, klass=None):
        if obj is None:
            return self
        value = obj.__dict__.get(self.__name__, _missing)
        if value is _missing:
            value = self._func(obj)
            obj.__dict__[self.__name__] = value
        return value

import threading


class ThreadLocalLazyProperty(LazyProperty):
    """
    Same as above but uses thread local dict for cache storage.
    """

    def __get__(self, obj, klass=None):
        if obj is None:
            return self
        if not hasattr(obj, '__tl_dict__'):
            obj.__tl_dict__ = threading.local().__dict__

        value = obj.__tl_dict__.get(self.__name__, _missing)
        if value is _missing:
            value = self._func(obj)
            obj.__tl_dict__[self.__name__] = value
        return value