Package org.omnifaces.util.cache

Class CacheInstancePerScopeProvider

java.lang.Object

org.omnifaces.util.cache.CacheInstancePerScopeProvider

All Implemented Interfaces:

CacheProvider

Direct Known Subclasses:

DefaultCacheProvider

public abstract class CacheInstancePerScopeProvider
extends Object
implements CacheProvider

Base class for Cache providers where for each scope a new instance of the cache is created if for that scope no instance is present yet.

This kind of cache provider is suitable for simple in-memory cache implementations, where the cache is very cheap to create. This is in contrast to caches where there is typically one expensive to create instance active per JVM, and where scoped caches are better expressed as nodes in a tree structure.

Since:

1.1

Author:

Arjan Tijms

Field Summary

Fields

Modifier and Type	Field	Description
static String	APP_MAX_CAP_PARAM_NAME
static String	APP_TTL_PARAM_NAME
static String	DEFAULT_CACHE_PARAM_NAME
static String	SESSION_MAX_CAP_PARAM_NAME
static String	SESSION_TTL_PARAM_NAME

Constructor Summary

Constructors

Constructor	Description
CacheInstancePerScopeProvider()

Method Summary

Modifier and Type	Method	Description
protected abstract Cache	createCache(Integer timeToLive, Integer maxCapacity)
Cache	getCache(FacesContext context, String scope)	Gets an instance of a Cache using the configured cache provider.
Map<String,String>	getParameters()
void	setParameters(Map<String,String> parameters)	Passes parameters to the cache provider implementation.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_CACHE_PARAM_NAME

public static final String DEFAULT_CACHE_PARAM_NAME

See Also:

Constant Field Values

APP_TTL_PARAM_NAME

public static final String APP_TTL_PARAM_NAME

See Also:

Constant Field Values

SESSION_TTL_PARAM_NAME

public static final String SESSION_TTL_PARAM_NAME

See Also:

Constant Field Values

APP_MAX_CAP_PARAM_NAME

public static final String APP_MAX_CAP_PARAM_NAME

See Also:

Constant Field Values

SESSION_MAX_CAP_PARAM_NAME

public static final String SESSION_MAX_CAP_PARAM_NAME

See Also:

Constant Field Values

Constructor Detail

CacheInstancePerScopeProvider

public CacheInstancePerScopeProvider()

Method Detail

getCache

public Cache getCache(FacesContext context,
                      String scope)

Description copied from interface: CacheProvider

Gets an instance of a Cache using the configured cache provider.

Specified by:

getCache in interface CacheProvider

Parameters:

context - faces context used for resolving the given scope.

scope - scope for which the cache should be obtained. Supported scopes are dependent on the specific caching provider, but generally at least "session" and "application" should be supported.

Returns:

Cache instance encapsulating the cache represented by this CacheProvider

setParameters

public void setParameters(Map<String,String> parameters)

Description copied from interface: CacheProvider

Passes parameters to the cache provider implementation. This is mainly intended for configuration of things like LRU and global TTL. Settings are mainly implementation specific.

Specified by:

setParameters in interface CacheProvider

Parameters:

parameters - map of parameters used to configure the cache.

getParameters

public Map<String,String> getParameters()

createCache

protected abstract Cache createCache(Integer timeToLive,
                                     Integer maxCapacity)