de.umass.lastfm.cache
Class MemoryCache

java.lang.Object
  de.umass.lastfm.cache.Cache
      de.umass.lastfm.cache.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

MemoryCache()

Method Summary

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

Methods inherited from class de.umass.lastfm.cache.Cache

createCacheEntryName, findExpirationDate, getExpirationPolicy, setExpirationPolicy, setHashCacheEntryNames

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(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 InputStream load(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(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(String cacheEntryName,
                  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(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