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118 lines
3.2 KiB
Python
118 lines
3.2 KiB
Python
"""
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Server Configuration flags
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This holds persistent server configuration flags.
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Config values should usually be set through the
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manager's conf() method.
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"""
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try:
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import cPickle as pickle
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except ImportError:
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import pickle
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from django.db import models
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from src.utils.idmapper.models import WeakSharedMemoryModel
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from src.utils import logger, utils
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from src.server.manager import ServerConfigManager
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#------------------------------------------------------------
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#
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# ServerConfig
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#
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#------------------------------------------------------------
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class ServerConfig(WeakSharedMemoryModel):
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"""
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On-the fly storage of global settings.
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Properties defined on ServerConfig:
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key - main identifier
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value - value stored in key. This is a pickled storage.
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"""
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#
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# ServerConfig database model setup
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#
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#
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# These database fields are all set using their corresponding properties,
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# named same as the field, but withtout the db_* prefix.
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# main name of the database entry
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db_key = models.CharField(max_length=64, unique=True)
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# config value
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db_value = models.TextField(blank=True)
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objects = ServerConfigManager()
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_is_deleted = False
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# Wrapper properties to easily set database fields. These are
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# @property decorators that allows to access these fields using
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# normal python operations (without having to remember to save()
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# etc). So e.g. a property 'attr' has a get/set/del decorator
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# defined that allows the user to do self.attr = value,
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# value = self.attr and del self.attr respectively (where self
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# is the object in question).
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# key property (wraps db_key)
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#@property
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def __key_get(self):
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"Getter. Allows for value = self.key"
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return self.db_key
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#@key.setter
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def __key_set(self, value):
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"Setter. Allows for self.key = value"
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self.db_key = value
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self.save()
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#@key.deleter
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def __key_del(self):
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"Deleter. Allows for del self.key. Deletes entry."
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self.delete()
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key = property(__key_get, __key_set, __key_del)
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# value property (wraps db_value)
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#@property
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def __value_get(self):
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"Getter. Allows for value = self.value"
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return pickle.loads(str(self.db_value))
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#@value.setter
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def __value_set(self, value):
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"Setter. Allows for self.value = value"
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if utils.has_parent('django.db.models.base.Model', value):
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# we have to protect against storing db objects.
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logger.log_errmsg("ServerConfig cannot store db objects! (%s)" % value)
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return
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self.db_value = pickle.dumps(value)
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self.save()
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#@value.deleter
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def __value_del(self):
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"Deleter. Allows for del self.value. Deletes entry."
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self.delete()
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value = property(__value_get, __value_set, __value_del)
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class Meta:
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"Define Django meta options"
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verbose_name = "Server Config value"
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verbose_name_plural = "Server Config values"
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#
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# ServerConfig other methods
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#
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def __unicode__(self):
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return "%s : %s" % (self.key, self.value)
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def store(self, key, value):
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"""
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Wrap the storage (handles pickling)
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"""
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self.key = key
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self.value = value
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