The command center performs the following functionalities:

• Sets up the web front end.
• Maintains a list of registered back-end services.
• Classifies and forwards front-end requests to the appropriate services.
• Returns requested information to the front end.

Specifically, app.py starts the Flask server (listening to front end) and web socket ASR router (listening to front end).

To configure the command center, please read the last section of this.

• Flask
• Apache Thrift
• scikit-learn
• MongoDB
• Memcached

• apache/: scripts and configuration files for the Apache HTTP server
• controllers/: web controllers, database module, Thrift modules, utilities module, query classification module, configuration file (Config.py), etc.
• data/: training data for query classifier
• static/: static contents of the web front end
• templates/: html Jinja templates
• app.py: top-level module
• clear_db.sh: script to clear MongoDB (only for testing)

make

This generates Thrift modules and thus only needs to be done once.

Start the server without using Apache:

make start_server

Open your browser and go to http://localhost:3000/. Notice that the command center assumes that the services specified in controllers/Config.py are running. Make sure to start those services as well. Read the top level README for more information about the configuration file.

We commend starting the Apache server in a Docker container (see deploy), but you if you really want to use it on your host machine (which makes debugging hard), select the configuration file in apache/conf (by default it is http, but if you need https, you should modify apache/conf/000-default_https.conf and apache/install_apache.sh), run apache/install_apache.sh, and follow the commands in web-controller.yaml or web-controller-https.yaml.