def _adapter_connect_stream(self):
"""Initiate full-stack connection establishment asynchronously for
internally-initiated connection bring-up.
Upon failed completion, we will invoke
`Connection._on_stream_terminated()`. NOTE: On success,
the stack will be up already, so there is no corresponding callback.
"""
self._connection_workflow = connection_workflow.AMQPConnectionWorkflow(
_until_first_amqp_attempt=True)
self._connection_workflow.set_io_services(self._nbio)
def create_connector():
"""`AMQPConnector` factory"""
return connection_workflow.AMQPConnector(
lambda _params: _StreamingProtocolShim(self), self._nbio)
self._connection_workflow.start(
[self.params],
connector_factory=create_connector,
native_loop=self._nbio.get_native_ioloop(),
on_done=functools.partial(
self._unshim_connection_workflow_callback,
self._on_connection_workflow_done))
def _start_connection_workflow(cls,
connection_configs,
connection_factory,
nbio,
workflow,
on_done):
"""Helper function for custom implementations of `create_connection()`.
:param sequence connection_configs: A sequence of one or more
`pika.connection.Parameters`-based objects.
:param callable connection_factory: A function that takes
`pika.connection.Parameters` as its only arg and returns a brand new
`pika.connection.Connection`-based adapter instance each time it is
called. The factory must instantiate the connection with
`internal_connection_workflow=False`.
:param pika.adapters.utils.nbio_interface.AbstractIOServices nbio:
:param connection_workflow.AbstractAMQPConnectionWorkflow | None workflow:
Pass an instance of an implementation of the
`connection_workflow.AbstractAMQPConnectionWorkflow` interface;
defaults to a `connection_workflow.AMQPConnectionWorkflow` instance
with default values for optional args.
:param callable on_done: as defined in
:py:meth:`connection_workflow.AbstractAMQPConnectionWorkflow.start()`.
:return: Connection workflow instance in use. The user should limit
their interaction with this object only to it's `abort()` method.
:rtype: connection_workflow.AbstractAMQPConnectionWorkflow
"""
if workflow is None:
workflow = connection_workflow.AMQPConnectionWorkflow()
LOGGER.debug('Created default connection workflow %r', workflow)
if isinstance(workflow, connection_workflow.AMQPConnectionWorkflow):
workflow.set_io_services(nbio)
def create_connector():
"""`AMQPConnector` factory."""
return connection_workflow.AMQPConnector(
lambda params: _StreamingProtocolShim(
connection_factory(params)),
nbio)
workflow.start(
connection_configs=connection_configs,
connector_factory=create_connector,
native_loop=nbio.get_native_ioloop(),
on_done=functools.partial(cls._unshim_connection_workflow_callback,
on_done))
return workflow