66 lines
1.9 KiB
Python
66 lines
1.9 KiB
Python
# Python
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import logging
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# Django
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from django.conf import settings
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from django.core.signals import setting_changed
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from django.db.models.signals import post_save, pre_delete, post_delete
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from django.core.cache import cache
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from django.dispatch import receiver
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# Tower
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from awx.conf import settings_registry
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from awx.conf.models import Setting
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logger = logging.getLogger('awx.conf.signals')
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__all__ = []
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def handle_setting_change(key, for_delete=False):
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# When a setting changes or is deleted, remove its value from cache along
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# with any other settings that depend on it.
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setting_keys = [key]
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for dependent_key in settings_registry.get_dependent_settings(key):
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# Note: Doesn't handle multiple levels of dependencies!
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setting_keys.append(dependent_key)
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# NOTE: This block is probably duplicated.
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cache_keys = set([Setting.get_cache_key(k) for k in setting_keys])
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cache.delete_many(cache_keys)
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# Send setting_changed signal with new value for each setting.
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for setting_key in setting_keys:
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setting_changed.send(
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sender=Setting,
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setting=setting_key,
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value=getattr(settings, setting_key, None),
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enter=not bool(for_delete),
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)
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@receiver(post_save, sender=Setting)
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def on_post_save_setting(sender, **kwargs):
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instance = kwargs['instance']
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# Skip for user-specific settings.
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if instance.user:
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return
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handle_setting_change(instance.key)
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@receiver(pre_delete, sender=Setting)
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def on_pre_delete_setting(sender, **kwargs):
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instance = kwargs['instance']
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# Skip for user-specific settings.
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if instance.user:
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return
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# Save instance key (setting name) for post_delete.
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instance._saved_key_ = instance.key
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@receiver(post_delete, sender=Setting)
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def on_post_delete_setting(sender, **kwargs):
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instance = kwargs['instance']
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key = getattr(instance, '_saved_key_', None)
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if key:
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handle_setting_change(key, True)
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