ogn-python

[] (https://travis-ci.org/glidernet/ogn-python) [] (https://coveralls.io/r/glidernet/ogn-python)

A python module for the Open Glider Network. The submodule 'ogn.gateway' is an aprs client, saving all received beacons into a database with SQLAlchemy. Other submodules process this data.

To schedule tasks like fetching ddb data, Celery with Redis is used.

Installation and Setup

1. Install python requirements

pip install -r requirements.txt

2. Install redis for asynchronous tasks ('ogn.collect.*')

$ apt-get install redis-server

3. Create database

$ ./manage.py db.init
$ alembic stamp head

Running the aprs client and task server

This scripts run in the foreground and should be deamonized (eg. use supervisord).

# start aprs client
$ ./manage.py gateway.run

# start task server (make sure redis is up and running)
$ celery -A ogn.collect worker -l info

manage.py - CLI options

usage: manage.py [<namespace>.]<command> [<args>]

positional arguments:
  command     the command to run

optional arguments:
  -h, --help  show this help message and exit

available commands:

  [db]
    init                   Initialize the database.
    update_ddb_file        Update devices with data from local file.
    update_ddb_ogn         Update devices with data from ogn.
  
  [gateway]
    run                    Run the aprs client.
  
  [logbook]
    compute                Compute takeoffs and landings.
    show                   Show a logbook for <airport_name> located at given position.
  
  [show.receiver]
    hardware_stats         Show some statistics of receiver hardware.
    list_all               Show a list of all receivers.
    software_stats         Show some statistics of receiver software.

The task server must be running for db.updateddb.

TODO

• Write celery backend and add task 'fetchddb'
• Rewrite manage.py with https://github.com/Birdback/manage.py or flask-script
• Rename existing cli commands
• Document/Improve cli commands
• Separate settings from module (currently at ogn/command/dbutils.py)
• Enable granular data acquisition (eg. store receiver beacons only)
• Future Database-Migrations: Use Alembic?
  • Rename 'Flarm' to 'Device'?
  • Rename self.heared_aircraft_IDs (lowercase) in aircraft_beacon
  • Rename self.heared_aircraft_IDs
• Fix command/logbook.py (@Meisterschueler?)
• Introduce scheduled tasks with 'celery beat' (eg. updateddb)

Scheduled tasks

• ogn.collect.fetchddb (generate Flarm table)
• ogn.collect.receiver (generate Receiver table)
• ogn.collect.logbook (generate TakeoffLanding table)

How to use virtualenv

$ sudo apt-get install python-virtualenv

$ virtualenv env
$ source env/bin/activate