Registry

gistfile1.txt

Guestagent conf:

service_registry_ext = dict_opt {service_engine*: trove.guestagent.manager.service_engine.Manager, ...}

service_engine is mysql, percona, cassandra, mongo etc.
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common/cfg.py
DictOpt('service_registry_ext', default=dict(), help=...)
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guestagent/dbaas.py:

from itertools import chain

defaults = {
  'mysql': 'trove.guestagent.manager.mysql.Manager',
  'percona': 'trove.guestagent.manager.mysql.Manager'
}
customs = CONF.service_registry_ext
SERVICE_REGISTRY = dict(chain(customs.iteritems(), defaults.iteritems()))
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bin/trove-guestagent:

manager = dbaas.SERVICE_REGISTRY.get(CONF.service_type)

if not manager:
  msg = "Manager not found for service type " + CONF.service_type
  raise RuntimeError(msg)
server = rpc.RpcService(manager=manager, host=CONF.guest_id)