Package org.datanucleus.api.jpa

Class JPAQueryCache

  • All Implemented Interfaces:
    Serializable
    public class JPAQueryCache
extends Object
implements Serializable
    Implementation of the JPA QueryCache. Provides a wrapper and hands off calls to the underlying query cache.
    See Also:
    Serialized Form

    • Constructor Summary

      Constructors 
      Constructor Description
      JPAQueryCache​(org.datanucleus.store.query.cache.QueryResultsCache cache)
      Constructor.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void evict​(javax.persistence.Query query)
      Evict all cached results for the provided query.
      void evict​(javax.persistence.Query query, Map params)
      Evict the cached results for the provided query and params.
      void evictAll()
      Evict the parameter instances from the second-level cache.
      org.datanucleus.store.query.cache.QueryResultsCache getQueryCache()
      Accessor for the underlying query cache.
      void pin​(javax.persistence.Query query)
      Method to pin the specified query in the cache, preventing garbage collection.
      void pin​(javax.persistence.Query query, Map params)
      Method to pin the specified query in the cache, preventing garbage collection.
      void unpin​(javax.persistence.Query query)
      Method to unpin the specified query from the cache, allowing garbage collection.
      void unpin​(javax.persistence.Query query, Map params)
      Method to unpin the specified query from the cache, allowing garbage collection.

    • Constructor Detail

      • JPAQueryCache

        public JPAQueryCache​(org.datanucleus.store.query.cache.QueryResultsCache cache)
        Constructor.
        Parameters:
        cache - Query results cache

    • Method Detail

      • getQueryCache

        public org.datanucleus.store.query.cache.QueryResultsCache getQueryCache()
        Accessor for the underlying query cache.
        Returns:
        Underlying query cache.

      • evict

        public void evict​(javax.persistence.Query query)
        Evict all cached results for the provided query.
        Parameters:
        query - The JPA query

      • evict

        public void evict​(javax.persistence.Query query,
                  Map params)
        Evict the cached results for the provided query and params.
        Parameters:
        query - The JPA query
        params - The input params

      • evictAll

        public void evictAll()
        Evict the parameter instances from the second-level cache. All instances in the EntityManagers cache are evicted from the second-level cache.

      • pin

        public void pin​(javax.persistence.Query query)
        Method to pin the specified query in the cache, preventing garbage collection.
        Parameters:
        query - The query

      • pin

        public void pin​(javax.persistence.Query query,
                Map params)
        Method to pin the specified query in the cache, preventing garbage collection.
        Parameters:
        query - The query
        params - Its params

      • unpin

        public void unpin​(javax.persistence.Query query)
        Method to unpin the specified query from the cache, allowing garbage collection.
        Parameters:
        query - The query

      • unpin

        public void unpin​(javax.persistence.Query query,
                  Map params)
        Method to unpin the specified query from the cache, allowing garbage collection.
        Parameters:
        query - The query
        params - Its params