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</head>
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<body>
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<main>
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<article id="content">
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<header>
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<h1 class="title">Module <code>main</code></h1>
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</header>
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<section id="section-intro">
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<details class="source">
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<summary>
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<span>Expand source code</span>
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</summary>
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<pre><code class="python">import logging
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import logging.config
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import argparse
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from os.path import exists
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from threading import Thread
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from tendo import singleton
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from sys import exit
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from config_manager import Config
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from usb_detector.detector import register_listener, usb_detector_run, usb_detector_set_config
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from usb_detector.event_listener import usb_connected_callback, usb_disconnected_callback
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from usb_detector.api_client import api_client_run, api_client_set_config
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def init_logging(app_config: Config):
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"""Initializes logging, api client, and usb detector.
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The function checks whether the path to the logger configuration
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file is valid or not. The path is defined in the logger section of the
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main configuration file. It also calls api_client_set_config and
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usb_detector_set_config to fully initialize the application.
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:param app_config: instance of Config (config manager)
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"""
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# If the logger configuration file exists.
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if exists(app_config.logger_config_file):
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# Initialize logging according to the logger config file.
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logging.config.fileConfig(fname=app_config.logger_config_file)
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# Initialize the rest of the application.
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api_client_set_config(app_config)
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usb_detector_set_config(app_config)
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else:
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# If the file does not exist, terminate the application.
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print(f"Cannot find logger configuration \"{app_config.logger_config_file}\"! Please specify valid a path or define a new one.")
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exit(1)
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if __name__ == "__main__":
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"""Main entry point of the application.
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The application expects one parameter to be passed in -
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the path to the configuration file. The user can print out help
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using the '-h' option.
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"""
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# Make sure that there is only one running instance (process) of this application.
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try:
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app_instance = singleton.SingleInstance()
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except singleton.SingleInstanceException:
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exit(1)
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# Parse the arguments passed in from the command line.
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arg_parser = argparse.ArgumentParser(description="ZF USB License Detector")
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arg_parser.add_argument("-c", "--config", dest="config", required=True, help="Path to the configuration file")
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args = arg_parser.parse_args()
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# Read the configuration file and initialize the application (logging).
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config = Config(args.config)
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init_logging(config)
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# Register callbacks (connected/disconnected USB device).
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register_listener(callback=usb_connected_callback, connected=True)
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register_listener(callback=usb_disconnected_callback, connected=False)
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# Create a thread for the USB detector.
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usb_detector_thread = Thread(target=usb_detector_run)
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usb_detector_thread.setDaemon(True)
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# Create a thread for resending failed payloads to the server.
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api_thread = Thread(target=api_client_run)
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api_thread.setDaemon(True)
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# Start the USB detector thread.
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logging.info("Starting USB detector.")
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usb_detector_thread.start()
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# Start the API client thread.
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logging.info("Starting API communication manager.")
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api_thread.start()
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# The execution should never get here as both
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# threads are infinite loops.
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usb_detector_thread.join()
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api_thread.join()</code></pre>
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</details>
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</section>
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<section>
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</section>
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<section>
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</section>
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<section>
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<h2 class="section-title" id="header-functions">Functions</h2>
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<dl>
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<dt id="main.init_logging"><code class="name flex">
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<span>def <span class="ident">init_logging</span></span>(<span>app_config: <a title="config_manager.Config" href="config_manager.html#config_manager.Config">Config</a>)</span>
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</code></dt>
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<dd>
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<div class="desc"><p>Initializes logging, api client, and usb detector.</p>
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<p>The function checks whether the path to the logger configuration
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file is valid or not. The path is defined in the logger section of the
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main configuration file. It also calls api_client_set_config and
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usb_detector_set_config to fully initialize the application.</p>
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<p>:param app_config: instance of Config (config manager)</p></div>
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<details class="source">
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<summary>
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<span>Expand source code</span>
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</summary>
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<pre><code class="python">def init_logging(app_config: Config):
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"""Initializes logging, api client, and usb detector.
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The function checks whether the path to the logger configuration
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file is valid or not. The path is defined in the logger section of the
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main configuration file. It also calls api_client_set_config and
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usb_detector_set_config to fully initialize the application.
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:param app_config: instance of Config (config manager)
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"""
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# If the logger configuration file exists.
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if exists(app_config.logger_config_file):
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# Initialize logging according to the logger config file.
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logging.config.fileConfig(fname=app_config.logger_config_file)
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# Initialize the rest of the application.
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api_client_set_config(app_config)
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usb_detector_set_config(app_config)
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else:
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# If the file does not exist, terminate the application.
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print(f"Cannot find logger configuration \"{app_config.logger_config_file}\"! Please specify valid a path or define a new one.")
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exit(1)</code></pre>
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</details>
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</dd>
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</dl>
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</section>
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<section>
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</section>
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</article>
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<nav id="sidebar">
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<h1>Index</h1>
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<div class="toc">
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<ul></ul>
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</div>
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<ul id="index">
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<li><h3><a href="#header-functions">Functions</a></h3>
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<ul class="">
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<li><code><a title="main.init_logging" href="#main.init_logging">init_logging</a></code></li>
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</ul>
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</li>
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</ul>
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</nav>
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</main>
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