db-relation-changed

#!/usr/bin/env python
from charmhelpers.core import when, when_not
import framework
import helpers

CONFIG_FILE = "/etc/myapp/app.conf"


@when("db.connectable", "cache.ready")
def regen_config(db, cache):
    data = {"dsn": db.dsn, "cache_url": dict(cache)}
    helpers.generate_template(CONFIG_FILE, "templates/app.config.j2", data)
    helpers.restart_service("myapp")


@when_not("db.connectable", "cache.ready")
def shutdown_service():
    helpers.shutdown_service("myapp")


if __name__ == '__main__':
    framework.main()