APIs specify the functionality available on the bus. To do this you
define API classes within your
bus.py file. You can also define
your API elsewhere and import it into your
For further discussion of APIs see the concepts section.
An example API¶
# An example API. You can define this in your bus.py, # or import into your bus.py file from elsewhere class SupportCaseApi(Api): # An event, # available at bus.support.case.case_created case_created = Event(parameters=('id', 'sender', 'subject', 'body')) # Options for this API class Meta: # API name on the bus name = 'support.case' # Will be available as a remote procedure call at # bus.support.case.get() def get(self, id): return get_case_from_db(pk=id)
A service can define zero or more APIs, and each API can contain zero or more events and zero or more procedures.
Meta class specifies options regarding the API, with
the only required option. The name specifies how the API will be
accessed on the bus.
You could call an RPC on the above API as follows:
bus = lightbus.create() # Call the get_case() RPC. case = bus.support.case.get_case(id=123)
You can also fire an event on this API:
bus = lightbus.create() # Fire the case_created event bus.support.case.case_created.fire( id=123, sender='Joe', subject='I need support please!', body='...', )
Specifies the name of the API. This will determine how the API is addressed on the bus. See naming, below.
name is a required option.
Naming your APIs¶
As you can from the
Meta.name option in the example above, API names
can contain periods which allow you
to structure your bus in a suitable form for your situation.
Some example API naming schemes may look like:
# Example API naming schemes for use within Meta.name Format: <service> Example: support.get_case() support.get_activity() Format: <service>.<object> Example: support.case.get() support.activity.get() Format: <deparment>.<service>.<object> Example: marketing.website.stats.get() ops.monitoring.servers.get_status()
Organising many APIs¶
- Will lightbus recognise a bus package as well as a bus module?
- It does now