Package freemarker.cache

Class StrongCacheStorage

java.lang.Object
freemarker.cache.StrongCacheStorage
All Implemented Interfaces:
CacheStorage, ConcurrentCacheStorage
public class StrongCacheStorage extends Object implements ConcurrentCacheStorage
Strong cache storage is a cache storage that simply wraps a Map. It holds a strong reference to all objects it was passed, therefore prevents the cache from being purged during garbage collection. This class is thread-safe to the extent that its underlying map is. The default implementation uses a concurrent map on Java 5 and above, so it is thread-safe in that case.

  • Constructor Details

    • StrongCacheStorage

      public StrongCacheStorage()

  • Method Details

    • isConcurrent

      public boolean isConcurrent()
      Description copied from interface: ConcurrentCacheStorage
      Returns true if this instance of cache storage is concurrently accessible from multiple threads without synchronization.
      Specified by:
      isConcurrent in interface ConcurrentCacheStorage
      Returns:
      true if this instance of cache storage is concurrently accessible from multiple threads without synchronization.

    • get

      public Object get(Object key)
      Description copied from interface: CacheStorage
      Retrieve a cached value associated with a key
      Specified by:
      get in interface CacheStorage
      Parameters:
      key - the key for retrieving an associated value
      Returns:
      the cached value associated with the key, or null if no value is associated with the key.

    • put

      public void put(Object key, Object value)
      Description copied from interface: CacheStorage
      Associates a key with a cached value
      Specified by:
      put in interface CacheStorage
      Parameters:
      key - the key to associate with a value
      value - the value associated with the key.

    • remove

      public void remove(Object key)
      Description copied from interface: CacheStorage
      Removes the value associated with a key, if it exists. If it doesn't exist, this method does nothing.
      Specified by:
      remove in interface CacheStorage
      Parameters:
      key - the key whose associated value is removed from the cache.

    • clear

      public void clear()
      Description copied from interface: CacheStorage
      Removes all values from this cache
      Specified by:
      clear in interface CacheStorage