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.. _code_design:
Code design
===========
.. todo::
- Link to refactor proposal.
- Change this page when refactoring is implemented.
UML classes diagram
--------------------
.. image:: images/classes_original.*
:alt: UML classes diagram
`classes_original.svg <./_images/classes_original.svg>`_
Packages diagram
-----------------
.. image:: ./images/packages_sbws.*
:alt: packages diagram
`packages_sbws.svg <./_images/packages_sbws.svg>`_
scanner threads
----------------
- `TorEventListener`: the thread that runs Tor and listens for events.
- ResultDump: the thread that get the measurement results from a queue
every second.
- `multiprocessing.ThreadPool` starts 3 independent threads:
- workers_thread
- tasks_thread
- results_thread
- measurement threads: they execute :func:`sbws.core.scanner.measure_relay`
There'll be a maximum of 3 by default.
.. image:: images/threads.*
:alt: scanner threads
Critical sections
-----------------
Data types that are read or wrote from the threads.
.. image:: images/critical_sections.*
:alt: scanner critical sections
:height: 400px
:align: center
Call graph
--------------
Initialization calls to the moment where the measurement threads start.
.. image:: images/pycallgraph.png
:alt: call graph
:height: 400px
:align: center
`callgraph.png <./_images/pycallgraph.png>`_
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