def test_for_free(kwargs, event, finalizers, deletion_ts, requires_finalizer):
event = {'type': event, 'object': {'metadata': {}}}
event['object']['metadata'].update(finalizers)
event['object']['metadata'].update(deletion_ts)
cause = detect_state_changing_cause(event=event,
requires_finalizer=requires_finalizer,
**kwargs)
assert cause.reason == Reason.FREE
check_kwargs(cause, kwargs)
def test_for_update(kwargs, event, finalizers, deletion_ts, annotations,
content, requires_finalizer):
event = {'type': event, 'object': {'metadata': {}}}
event['object'].update(content)
event['object']['metadata'].update(finalizers)
event['object']['metadata'].update(deletion_ts)
event['object']['metadata'].update(annotations)
cause = detect_state_changing_cause(event=event,
requires_finalizer=requires_finalizer,
diff=True,
**kwargs)
assert cause.reason == Reason.UPDATE
check_kwargs(cause, kwargs)
async def custom_object_handler(
lifecycle: lifecycles.LifeCycleFn,
registry: registries.GlobalRegistry,
resource: resources.Resource,
event: bodies.Event,
freeze: asyncio.Event,
replenished: asyncio.Event,
event_queue: posting.K8sEventQueue,
) -> None:
"""
Handle a single custom object low-level watch-event.
Convert the low-level events, as provided by the watching/queueing tasks,
to the high-level causes, and then call the cause-handling logic.
All the internally provoked changes are intercepted, do not create causes,
and therefore do not call the handling logic.
"""
body: bodies.Body = event['object']
patch: patches.Patch = patches.Patch()
delay: Optional[float] = None
# Each object has its own prefixed logger, to distinguish parallel handling.
logger = logging_engine.ObjectLogger(body=body)
posting.event_queue_loop_var.set(asyncio.get_running_loop())
posting.event_queue_var.set(
event_queue) # till the end of this object's task.
# If the global freeze is set for the processing (i.e. other operator overrides), do nothing.
if freeze.is_set():
logger.debug("Ignoring the events due to freeze.")
return
# Invoke all silent spies. No causation, no progress storage is performed.
if registry.has_event_watching_handlers(resource=resource):
event_watching_cause = causation.detect_event_watching_cause(
event=event,
resource=resource,
logger=logger,
patch=patch,
)
await handle_event_watching_cause(
lifecycle=lifecycles.all_at_once,
registry=registry,
cause=event_watching_cause,
)
# Object patch accumulator. Populated by the methods. Applied in the end of the handler.
# Detect the cause and handle it (or at least log this happened).
if registry.has_state_changing_handlers(resource=resource):
extra_fields = registry.get_extra_fields(resource=resource)
old, new, diff = lastseen.get_essential_diffs(
body=body, extra_fields=extra_fields)
state_changing_cause = causation.detect_state_changing_cause(
event=event,
resource=resource,
logger=logger,
patch=patch,
old=old,
new=new,
diff=diff,
requires_finalizer=registry.requires_finalizer(resource=resource,
body=body),
)
delay = await handle_state_changing_cause(
lifecycle=lifecycle,
registry=registry,
cause=state_changing_cause,
)
# Whatever was done, apply the accumulated changes to the object.
# But only once, to reduce the number of API calls and the generated irrelevant events.
if patch:
logger.debug("Patching with: %r", patch)
await patching.patch_obj(resource=resource, patch=patch, body=body)
# Sleep strictly after patching, never before -- to keep the status proper.
# The patching above, if done, interrupts the sleep instantly, so we skip it at all.
if delay and not patch:
logger.debug(f"Sleeping for {delay} seconds for the delayed handlers.")
unslept = await sleeping.sleep_or_wait(delay, replenished)
if unslept is not None:
logger.debug(
f"Sleeping was interrupted by new changes, {unslept} seconds left."
)
else:
now = datetime.datetime.utcnow()
dummy = patches.Patch(
{'status': {
'kopf': {
'dummy': now.isoformat()
}
}})
logger.debug("Provoking reaction with: %r", dummy)
await patching.patch_obj(resource=resource, patch=dummy, body=body)