Package org.h2.util

Interface Cache

    • Method Detail

      • getAllChanged

        java.util.ArrayList<CacheObject> getAllChanged()
        Get all objects in the cache that have been changed.
        Returns:
        the list of objects
      • clear

        void clear()
        Clear the cache.
      • get

        CacheObject get​(int pos)
        Get an element in the cache if it is available. This will move the item to the front of the list.
        Parameters:
        pos - the unique key of the element
        Returns:
        the element or null
      • put

        void put​(CacheObject r)
        Add an element to the cache. Other items may fall out of the cache because of this. It is not allowed to add the same record twice.
        Parameters:
        r - the object
      • update

        CacheObject update​(int pos,
                           CacheObject record)
        Update an element in the cache. This will move the item to the front of the list.
        Parameters:
        pos - the unique key of the element
        record - the element
        Returns:
        the element
      • remove

        boolean remove​(int pos)
        Remove an object from the cache.
        Parameters:
        pos - the unique key of the element
        Returns:
        true if the key was in the cache
      • find

        CacheObject find​(int pos)
        Get an element from the cache if it is available. This will not move the item to the front of the list.
        Parameters:
        pos - the unique key of the element
        Returns:
        the element or null
      • setMaxMemory

        void setMaxMemory​(int size)
        Set the maximum memory to be used by this cache.
        Parameters:
        size - the maximum size in KB
      • getMaxMemory

        int getMaxMemory()
        Get the maximum memory to be used.
        Returns:
        the maximum size in KB
      • getMemory

        int getMemory()
        Get the used size in KB.
        Returns:
        the current size in KB