def message_controller(self):
stages = _get_builtin_entry_points('message', self._storage,
self.control_driver)
kwargs = {
'subscription_controller': self._storage.subscription_controller
}
stages.extend(_get_storage_pipeline('message', self.conf, **kwargs))
stages.append(self._storage.message_controller)
return common.Pipeline(stages)
def message_controller(self):
stages = _get_builtin_entry_points('message', self._storage,
self.control_driver, self.conf)
kwargs = {
'subscription_controller': self._storage.subscription_controller,
'max_notifier_workers':
self.conf.notification.max_notifier_workers,
'require_confirmation': self.conf.notification.require_confirmation
}
stages.extend(_get_storage_pipeline('message', self.conf, **kwargs))
stages.append(self._storage.message_controller)
return common.Pipeline(stages)
def _get_storage_pipeline(resource_name, conf):
"""Constructs and returns a storage resource pipeline.
This is a helper function for any service supporting
pipelines for the storage layer. The function returns
a pipeline based on the `{resource_name}_pipeline`
config option.
Stages in the pipeline implement controller methods
that they want to hook. A stage can halt the
pipeline immediate by returning a value that is
not None; otherwise, processing will continue
to the next stage, ending with the actual storage
controller.
:param conf: Configuration instance.
:type conf: `cfg.ConfigOpts`
:returns: A pipeline to use.
:rtype: `Pipeline`
"""
conf.register_opts(_PIPELINE_CONFIGS, group=_PIPELINE_GROUP)
storage_conf = conf[_PIPELINE_GROUP]
pipeline = []
for ns in storage_conf[resource_name + '_pipeline']:
try:
mgr = driver.DriverManager('zaqar.queues.storage.stages',
ns,
invoke_on_load=True)
pipeline.append(mgr.driver)
except RuntimeError as exc:
LOG.warning(_(u'Stage %(stage)d could not be imported: %(ex)s'), {
'stage': ns,
'ex': str(exc)
})
continue
return common.Pipeline(pipeline)
def subscription_controller(self):
stages = _get_storage_pipeline('subscription', self.conf)
stages.append(self._storage.subscription_controller)
return common.Pipeline(stages)
def claim_controller(self):
stages = _get_storage_pipeline('claim', self.conf)
stages.append(self._storage.claim_controller)
return common.Pipeline(stages)
def message_controller(self):
stages = _get_storage_pipeline('message', self.conf)
stages.append(self._storage.message_controller)
return common.Pipeline(stages)
def subscription_controller(self):
stages = _get_builtin_entry_points('subscription', self._storage,
self.control_driver, self.conf)
stages.extend(_get_storage_pipeline('subscription', self.conf))
stages.append(self._storage.subscription_controller)
return common.Pipeline(stages)
def claim_controller(self):
stages = _get_builtin_entry_points('claim', self._storage,
self.control_driver, self.conf)
stages.extend(_get_storage_pipeline('claim', self.conf))
stages.append(self._storage.claim_controller)
return common.Pipeline(stages)
