def _getConfiguration(self):
        """
        Load application configuration files.

        :return: <dict>
        """
        configDirectoryPath = os.path.join("application", "config")
        config = Config(configDirectoryPath)
        configData = config.getData()

        # setting application parameters
        reactor.suggestThreadPoolSize(
            int(configData["performance"]["threadPoolSize"])
        )

        return configData
Load application configuration files.

        :return: <dict>