Package org.apache.flink.runtime.util

Interface GroupCache<G,K,V>

Type Parameters:
G - The group.
K - The key.
V - The value.
All Known Implementing Classes:
DefaultGroupCache
public interface GroupCache<G,K,V>
This GroupCache can cache group, key and value. The group and key are cache key, each key belongs to a certain group. All corresponding keys and values will be cleared if a group is cleared.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    clear()
    clear all cache.
    void
    clearCacheForGroup(G group)
    Clear all caches of the corresponding group.
    V
    get(G group, K key)
    Get value in cache.
    void
    put(G group, K key, V value)
    Put group, key and value to cache.

  • Method Details

    • clear

      void clear()
      clear all cache.

    • get

      @Nullable V get(G group, K key)
      Get value in cache.
      Returns:
      value in cache if exists, otherwise null

    • put

      void put(G group, K key, V value)
      Put group, key and value to cache.

    • clearCacheForGroup

      void clearCacheForGroup(G group)
      Clear all caches of the corresponding group.