Package org.omnifaces.util.cache

Class TimeToLiveCache

java.lang.Object

org.omnifaces.util.cache.TimeToLiveCache

All Implemented Interfaces:

Serializable, Cache

Direct Known Subclasses:

DefaultCache

public abstract class TimeToLiveCache
extends Object
implements Cache

Base class that can be used by Map based caches that don't support time to live semantics and arbitrary attributes natively.

Since:

1.1

Author:

Arjan Tijms

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TimeToLiveCache(Integer defaultTimeToLive)

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the entire cache
String	get(String key)	Gets a value from the cache
Serializable	getAttribute(String key, String name)	Gets a named attribute from the cache entry identified by the key parameter.
Serializable	getObject(String key)	Gets a value from the cache
void	put(String key, String value)	Stores a value in the cache
void	put(String key, String value, int timeToLive)	Stores a value in the cache
void	putAttribute(String key, String name, Serializable value, int timeToLive)	Stores a named attribute in the cache entry identified by the key parameter.
void	putObject(String key, Serializable value, int timeToLive)	Stores a value in the cache
void	remove(String key)	Removes a value from the cache
protected void	setCacheStore(Map<String,CacheEntry> cacheStore)

Methods inherited from class java.lang.Object

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

Constructor Detail

TimeToLiveCache

protected TimeToLiveCache(Integer defaultTimeToLive)

Method Detail

get

public String get(String key)

Description copied from interface: Cache

Gets a value from the cache

Specified by:

get in interface Cache

Parameters:

key - the key under which a value was previously stored

Returns:

The previously stored value, or null if no such value exists

getObject

public Serializable getObject(String key)

Description copied from interface: Cache

Gets a value from the cache

Specified by:

getObject in interface Cache

Parameters:

key - the key under which a value was previously stored

Returns:

The previously stored value, or null if no such value exists

put

public void put(String key,
                String value)

Description copied from interface: Cache

Stores a value in the cache

Specified by:

put in interface Cache

Parameters:

key - the key under which a value is to be stored

value - the value that is to be stored

put

public void put(String key,
                String value,
                int timeToLive)

Description copied from interface: Cache

Stores a value in the cache

Specified by:

put in interface Cache

Parameters:

key - the key under which a value is to be stored

value - the value that is to be stored

timeToLive - the amount of time in seconds for which the cached value is valid from the time it's being added to the cache. It's provider specific whether the cache implementation will actually remove (evict) the entry after this time has elapsed or will only perform a check upon accessing the cache entry. Whatever method the implementation chooses; after this time is elapsed a call to Cache.get(String) should return null.

putObject

public void putObject(String key,
                      Serializable value,
                      int timeToLive)

Description copied from interface: Cache

Stores a value in the cache

Specified by:

putObject in interface Cache

Parameters:

key - the key under which a value is to be stored

value - the value that is to be stored

timeToLive - the amount of time in seconds for which the cached value is valid from the time it's being added to the cache. It's provider specific whether the cache implementation will actually remove (evict) the entry after this time has elapsed or will only perform a check upon accessing the cache entry. Whatever method the implementation chooses; after this time is elapsed a call to Cache.get(String) should return null.

putAttribute

public void putAttribute(String key,
                         String name,
                         Serializable value,
                         int timeToLive)

Description copied from interface: Cache

Stores a named attribute in the cache entry identified by the key parameter.

Specified by:

putAttribute in interface Cache

Parameters:

key - key that identifies the first level cache entry

name - name of the attribute in the second level

value - value associated with the {key, name} hierarchy.

timeToLive - the amount of time in seconds for which the cached value is valid. Only used when there's no first level entry yet.

getAttribute

public Serializable getAttribute(String key,
                                 String name)

Description copied from interface: Cache

Gets a named attribute from the cache entry identified by the key parameter.

This in effect implements a 2-level multi-map, which the single main value stored in the first level, and the optional attributes stored in the second level.

Specified by:

getAttribute in interface Cache

Parameters:

key - key that identifies the first level cache entry

name - name of the attribute in the second level

Returns:

the value associated with the {key, name} hierarchy.

remove

public void remove(String key)

Description copied from interface: Cache

Removes a value from the cache

Specified by:

remove in interface Cache

Parameters:

key - the key under which a value is to be stored

clear

public void clear()

Description copied from interface: Cache

Clears the entire cache

Specified by:

clear in interface Cache

setCacheStore

protected void setCacheStore(Map<String,CacheEntry> cacheStore)