Package de.umass.lastfm.cache

Class MemoryCache

  • public class MemoryCache
extends Cache
    This class is just for testing. You probably don't want to use it in production.
    Author:
    Janni Kovacs

    • Constructor Summary

      Constructors 
      Constructor Description
      MemoryCache()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void clear()
      Clears the cache by effectively removing all cached data.
      boolean contains​(java.lang.String cacheEntryName)
      Checks if the cache contains an entry with the given name.
      boolean isExpired​(java.lang.String cacheEntryName)
      Checks if the specified entry is expired.
      java.io.InputStream load​(java.lang.String cacheEntryName)
      Loads the specified entry from the cache and returns an InputStream to be read from.
      void remove​(java.lang.String cacheEntryName)
      Removes the specified entry from the cache if available.
      void store​(java.lang.String cacheEntryName, java.io.InputStream inputStream, long expirationDate)
      Stores a request in the cache.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • MemoryCache

        public MemoryCache()

    • Method Detail

      • contains

        public boolean contains​(java.lang.String cacheEntryName)
        Description copied from class: Cache
        Checks if the cache contains an entry with the given name.
        Specified by:
        contains in class Cache
        Parameters:
        cacheEntryName - An entry name
        Returns:
        true if the cache contains this entry

      • load

        public java.io.InputStream load​(java.lang.String cacheEntryName)
        Description copied from class: Cache
        Loads the specified entry from the cache and returns an InputStream to be read from. Returns null if the cache does not contain the specified cacheEntryName.
        Specified by:
        load in class Cache
        Parameters:
        cacheEntryName - An entry name
        Returns:
        an InputStream or null

      • remove

        public void remove​(java.lang.String cacheEntryName)
        Description copied from class: Cache
        Removes the specified entry from the cache if available. Does nothing if no such entry is available.
        Specified by:
        remove in class Cache
        Parameters:
        cacheEntryName - An entry name

      • store

        public void store​(java.lang.String cacheEntryName,
                  java.io.InputStream inputStream,
                  long expirationDate)
        Description copied from class: Cache
        Stores a request in the cache.
        Specified by:
        store in class Cache
        Parameters:
        cacheEntryName - The entry name to be stored to
        inputStream - An InputStream containing the data to be cached
        expirationDate - The date of expiration represented in milliseconds since 1.1.1970

      • isExpired

        public boolean isExpired​(java.lang.String cacheEntryName)
        Description copied from class: Cache
        Checks if the specified entry is expired.
        Specified by:
        isExpired in class Cache
        Parameters:
        cacheEntryName - An entry name
        Returns:
        true if the entry is expired

      • clear

        public void clear()
        Description copied from class: Cache
        Clears the cache by effectively removing all cached data.
        Specified by:
        clear in class Cache