def lookup_backend(fiware_service: str) -> MaybeString:
cfg_reader = YamlReader(log=log().debug)
env_reader = EnvReader(log=log().info)
config = cfg_reader.from_env_file(QL_CONFIG_ENV_VAR, defaults={})
tenant_backend = maybe_string_match(config, 'tenants', fiware_service,
'backend')
default_backend = maybe_string_match(config, 'default-backend')
env_backend = env_reader.read(StrVar(QL_DEFAULT_DB_ENV_VAR, CRATE_BACKEND))
return tenant_backend or env_backend or default_backend
def lookup_backend(fiware_service: str) -> MaybeString:
cfg_reader = YamlReader(log=log().debug)
env_reader = EnvReader(log=log().debug)
config = cfg_reader.from_env_file(QL_CONFIG_ENV_VAR, defaults={})
tenant_backend = maybe_string_match(config, 'tenants', fiware_service,
'backend')
return tenant_backend or default_backend()
def default_backend() -> MaybeString:
cfg_reader = YamlReader(log=log().debug)
env_reader = EnvReader(log=log().debug)
config = cfg_reader.from_env_file(QL_CONFIG_ENV_VAR, defaults={})
config_backend = maybe_string_match(config, 'default-backend')
env_backend = env_reader.read(StrVar(QL_DEFAULT_DB_ENV_VAR, None))
return env_backend or config_backend or CRATE_BACKEND
def translator_for(fiware_service: str):
reader = YamlReader(log=log().debug)
config = reader.from_env_file(QL_CONFIG_ENV_VAR, defaults={})
backend = maybe_string_match(config, 'tenants', fiware_service, 'backend')\
or maybe_string_match(config, 'default-backend')
backend = backend.strip().lower() if backend is not None else ''
if backend == CRATE_BACKEND:
translator = CrateTranslatorInstance()
selected = CRATE_BACKEND
elif backend == TIMESCALE_BACKEND:
translator = postgres_translator_instance()
selected = TIMESCALE_BACKEND
else:
translator = CrateTranslatorInstance()
selected = CRATE_BACKEND
log().info(
f"Backend selected for tenant '{fiware_service}' is: {selected}")
return translator