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by Bertrand
01:15
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AtomicCache.commit()   A

↳ Parent: AtomicCache

Complexity

Conditions 1

Size

Total Lines 6

Duplication

Lines 0
Ratio 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
cc 1
dl 0
loc 6
rs 9.4285
c 1
b 0
f 0
1 
# coding: utf-8
2 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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from __future__ import unicode_literals

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class AtomicCache(dict):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def __init__(self, parent_cache, db_alias):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        super(AtomicCache, self).__init__()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.parent_cache = parent_cache

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.db_alias = db_alias

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.to_be_invalidated = set()

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def set(self, k, v, timeout):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self[k] = v

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def get_many(self, keys):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        data = {k: self[k] for k in keys if k in self}

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        missing_keys = set(keys)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        missing_keys.difference_update(data)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        data.update(self.parent_cache.get_many(missing_keys))

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return data

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    def set_many(self, data, timeout):

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        self.update(data)

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    def commit(self):

            


            
                                                                        
                            
            
                                    
            
            

                
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        self.parent_cache.set_many(self, None)

            


            
                                                                        
                            
            
                                    
            
            

                
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        # The previous `set_many` is not enough.  The parent cache needs to be

            


            
                                                                        
                            
            
                                    
            
            

                
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        # invalidated in case another transaction occurred in the meantime.

            


            
                                                                        
                            
            
                                    
            
            

                
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        _invalidate_tables(self.parent_cache, self.db_alias,

            


            
                                                                        
                            
            
                                    
            
            

                
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                           self.to_be_invalidated)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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# We import this after AtomicCache to avoid a circular import issue and

            


            
                                                                                                            
                            
            
                                    
            
            

                
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# avoid importing this locally, which degrades performance.

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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from .utils import _invalidate_tables

            


            
                                                        
            
                                    
            
            

                
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