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dd� Zdd� ZdS )�PayloadManageraZ Framework for starting and watching the payload thread.
This class defines several states (PayloadState enum), and events can
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already been reached when a listener is added, the event code may be
run in either the calling thread or the payload thread. The event code
will block the payload thread regardless, so try not to run anything
that takes a long time.
All states except ERROR are expected to happen linearly, and adding
a listener for a state that has already been reached or passed will
immediately trigger that listener. For example, if the payload thread is
currently in DOWNLOADING_GROUP_METADATA, adding a listener for
WAITING_NETWORK will immediately run the code being added
for WAITING_NETWORK.
The payload thread data should be accessed using the payloadMgr object,
and the running thread can be accessed using threadMgr with the
THREAD_PAYLOAD constant, if you need to wait for it or something. The
thread should be started using payloadMgr.restart_thread.
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has no effect.
:param payload.Payload payload: The payload instance
:param bool fallback: Whether to fall back to the default repo in case of error
:param bool checkmount: Whether to check for valid mounted media
:param bool onlyOnChange: Restart thread only if existing repositories changed.
This won't restart thread even when a new repository was added!!
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