def __init__(self, *args):
super().__init__(*args)
# Abstract out framework and friends so that this object is not
# too tightly coupled with the underlying framework's implementation.
# From this point forward, our Charm object will only interact with the
# adapter and not directly with the framework.
self.fw_adapter = framework.FrameworkAdapter(self.framework)
self.prometheus_client = interface_http.Client(self, 'prometheus-api')
self.mysql = interface_mysql.MySQLInterface(self, 'mysql')
self.state.set_default(
prometheus_server_details=None,
mysql_server_details=None,
)
# Bind event handlers to events
event_handler_bindings = {
self.mysql.on.new_relation: self.on_mysql_new_relation,
self.on.config_changed: self.on_config_changed,
self.on.start: self.on_start,
self.on.update_status: self.on_update_status,
self.on.upgrade_charm: self.on_start,
self.prometheus_client.on.server_available: self.on_prom_available,
}
for event, delegator in event_handler_bindings.items():
self.fw_adapter.observe(event, delegator)
def __init__(self, charm, relation_name):
super().__init__(charm, relation_name)
self._relation_name = relation_name
# Abstract out framework and friends so that this object is not
# too tightly coupled with the underlying framework's implementation.
# From this point forward, our Client object will only interact with
# the adapter and not directly with the framework.
self.adapter = framework.FrameworkAdapter(self.framework)
self.adapter.observe(charm.on[relation_name].relation_changed,
self.on_relation_changed)