Method __init__

asyncpg/connection.py:2485–2508

(self, *, loop, max_size, on_remove, max_lifetime)

                 '_max_lifetime')

    def __init__(self, *, loop, max_size, on_remove, max_lifetime):
        self._loop = loop
        self._max_size = max_size
        self._on_remove = on_remove
        self._max_lifetime = max_lifetime

        # We use an OrderedDict for LRU implementation.  Operations:
        #
        # * We use a simple `__setitem__` to push a new entry:
        #       `entries[key] = new_entry`
        #   That will push `new_entry` to the *end* of the entries dict.
        #
        # * When we have a cache hit, we call
        #       `entries.move_to_end(key, last=True)`
        #   to move the entry to the *end* of the entries dict.
        #
        # * When we need to remove entries to maintain `max_size`, we call
        #       `entries.popitem(last=False)`
        #   to remove an entry from the *beginning* of the entries dict.
        #
        # So new entries and hits are always promoted to the end of the
        # entries dict, whereas the unused one will group in the
        # beginning of it.
        self._entries = collections.OrderedDict()

    def __len__(self):
        return len(self._entries)