Class BlockingTransactionalTopKCommandsImpl<K,​V>

    • Method Detail

      • topkAdd

        public void topkAdd​(K key,
                            V item)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.ADD. Summary: Adds an item to the data structure. Multiple items can be added at once. If an item enters the Top-K list, the item which is expelled is returned. This allows dynamic heavy-hitter detection of items being entered or expelled from Top-K list. Group: top-k

        Specified by:
        topkAdd in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list where item is added, must not be null
        item - the item to add, must not be null
      • topkAdd

        public void topkAdd​(K key,
                            V... items)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.ADD. Summary: Adds an item to the data structure. Multiple items can be added at once. If an item enters the Top-K list, the item which is expelled is returned. This allows dynamic heavy-hitter detection of items being entered or expelled from Top-K list. Group: top-k

        Specified by:
        topkAdd in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list where item is added, must not be null
        items - the items to add, must not be null, must not be empty, must not contain null
      • topkIncrBy

        public void topkIncrBy​(K key,
                               V item,
                               int increment)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.INCRBY. Summary: Increase the score of an item in the data structure by increment. Multiple items' score can be increased at once. If an item enters the Top-K list, the item which is expelled is returned. Group: top-k

        Specified by:
        topkIncrBy in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list where item is added, must not be null
        item - the item to add, must not be null
        increment - increment to current item score. Increment must be greater or equal to 1. Increment is limited to 100,000 to avoid server freeze.
      • topkIncrBy

        public void topkIncrBy​(K key,
                               Map<V,​Integer> couples)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.INCRBY. Summary: Increase the score of an item in the data structure by increment. Multiple items' score can be increased at once. If an item enters the Top-K list, the item which is expelled is returned. Group: top-k

        Specified by:
        topkIncrBy in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list where item is added, must not be null
        couples - The map containing the item / increment, must not be null, must not be empty
      • topkQuery

        public void topkQuery​(K key,
                              V item)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.QUERY. Summary: Checks whether an item is one of Top-K items. Multiple items can be checked at once. Group: top-k

        Specified by:
        topkQuery in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list, must not be null
        item - the item to check, must not be null
      • topkQuery

        public void topkQuery​(K key,
                              V... items)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.QUERY. Summary: Checks whether an item is one of Top-K items. Multiple items can be checked at once. Group: top-k

        Specified by:
        topkQuery in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list, must not be null
        items - the items to check, must not be null, must not contain null, must not be empty
      • topkReserve

        public void topkReserve​(K key,
                                int topk)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.RESERVE. Summary: Initializes a TopK with specified parameters. Group: top-k

        Specified by:
        topkReserve in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list, must not be null
        topk - the number of top occurring items to keep.
      • topkReserve

        public void topkReserve​(K key,
                                int topk,
                                int width,
                                int depth,
                                double decay)
        Description copied from interface: TransactionalTopKCommands
        Execute the command TOPK.RESERVE. Summary: Initializes a TopK with specified parameters. Group: top-k

        Specified by:
        topkReserve in interface TransactionalTopKCommands<K,​V>
        Parameters:
        key - the name of list, must not be null
        topk - the number of top occurring items to keep.
        width - the number of counters kept in each array. (Default 8)
        depth - the number of arrays. (Default 7)
        decay - the probability of reducing a counter in an occupied bucket. It is raised to power of it's counter (decay ^ bucket[i].counter). Therefore, as the counter gets higher, the chance of a reduction is being reduced. (Default 0.9)