| Class | 
                        Description | 
                    
                            | 
                                
                                    CommonCache
                                
                             | 
                            Represents a simple key-value cache, which is NOT thread safe and backed by a Map instance | 
                        
                            | 
                                
                                    ConcurrentCommonCache
                                
                             | 
                            Represents a simple key-value cache, which is thread safe and backed by a Map instance | 
                        
                            | 
                                
                                    ConcurrentSoftCache
                                
                             | 
                            Represents concurrent cache holding SoftReference instance as value | 
                        
                            | 
                                
                                    LRUCache
                                
                             | 
                            A cache backed by a ConcurrentLinkedHashMap | 
                        
                            | 
                                
                                    Memoize
                                
                             | 
                            Implements memoize for Closures.
  | 
                        
                            | 
                                
                                    NullProtectionStorage
                                
                             | 
                            A NullObject pattern implementation for ProtectionStorage
 Doesn't protect any resources.
  | 
                        
                            | 
                                
                                    UnlimitedConcurrentCache
                                
                             | 
                            A cache backed by a ConcurrentHashMap |