org.castor.cache
Interface Cache

All Superinterfaces:
java.util.Map<java.lang.Object,java.lang.Object>
All Known Implementing Classes:
AbstractBaseCache, AbstractDistributedCache, AbstractHashbelt, CoherenceCache, CountLimited, DebuggingCacheProxy, EHCache, FIFOHashbelt, FKCache, GigaspacesCache, JCache, JcsCache, LRUHashbelt, NoCache, OsCache, TimeLimited, Unlimited

public interface Cache
extends java.util.Map<java.lang.Object,java.lang.Object>

Interface specification for performance caches as used in Castor. Please implement this interface if you wish to provide your own cache implementation.

At initialization each cache implementation gets passed a properties map containing key/value pairs. Apart of 3 reserved standard properties, individual once can be used to configure the cache behavier. The standard properties are:

type which is evaluated by the CacheFactoryRegistry and defines the requested cache type. If not set count-limited cahce will be used as default.
debug is also evaluated by the CacheFactoryRegistry and defines if the cache instance will be wrapped by a DebuggingCacheProxy to log debug messages at every access to the cache. If not set no debugging will take place.
name is used by AbstractBaseCache to set the name of the cache instance. At the moment every cache type available extends this AbstractBaseCache. The name does not influence internal behavier of the cache but is usefull to identify from which cache instance debug messages are coming from. By default castor uses the classname of the cached objects as name for the cache. If not present the name will be empty.

For a description of the individual properties you should have a look at the javadoc of the different cache types. It needs to be noted that only string keys and values are allowed.

Since:
1.0
Version:
$Revision: 7950 $ $Date: 2006-04-25 16:09:10 -0600 (Tue, 25 Apr 2006) $
Author:
Werner Guttmann, Ralf Joachim

Nested Class Summary
 
Nested classes/interfaces inherited from interface java.util.Map
java.util.Map.Entry<K,V>
 
Field Summary
static java.lang.String DEFAULT_DEBUG
          Default is debugging switched off.
static java.lang.String DEFAULT_NAME
          Default cache name to be used.
static java.lang.String DEFAULT_TYPE
          Default cache type to be used.
static java.lang.String PARAM_DEBUG
          Mapped initialization parameter debug.
static java.lang.String PARAM_NAME
          Mapped initialization parameter name.
static java.lang.String PARAM_TYPE
          Mapped initialization parameter type.
 
Method Summary
 void close()
          Life-cycle method to allow custom resource cleanup for a cache implementation.
 void expire(java.lang.Object key)
          Remove the mapping identified by key from the cache.
 void expireAll()
          Removes all mappings from the cache.
 java.lang.String getName()
          Get virtual name of this cache.
 java.lang.String getType()
          Indicates the type of this cache.
 void initialize(java.util.Properties params)
          Lyfe-cycle method to allow custom initialization of cache implementations.
 
Methods inherited from interface java.util.Map
clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, keySet, put, putAll, remove, size, values
 

Field Detail

PARAM_TYPE

static final java.lang.String PARAM_TYPE
Mapped initialization parameter type.

See Also:
Constant Field Values

DEFAULT_TYPE

static final java.lang.String DEFAULT_TYPE
Default cache type to be used.

See Also:
Constant Field Values

PARAM_NAME

static final java.lang.String PARAM_NAME
Mapped initialization parameter name.

See Also:
Constant Field Values

DEFAULT_NAME

static final java.lang.String DEFAULT_NAME
Default cache name to be used.

See Also:
Constant Field Values

PARAM_DEBUG

static final java.lang.String PARAM_DEBUG
Mapped initialization parameter debug.

See Also:
Constant Field Values

DEFAULT_DEBUG

static final java.lang.String DEFAULT_DEBUG
Default is debugging switched off.

See Also:
Constant Field Values
Method Detail

initialize

void initialize(java.util.Properties params)
                throws CacheAcquireException
Lyfe-cycle method to allow custom initialization of cache implementations.

Parameters:
params - Parameters to initialize the cache (e.g. name, capacity).
Throws:
CacheAcquireException - If cache can not be initialized.

close

void close()
Life-cycle method to allow custom resource cleanup for a cache implementation.


getType

java.lang.String getType()
Indicates the type of this cache.

Returns:
The cache type.

getName

java.lang.String getName()
Get virtual name of this cache. Castor sets the cache name to the class name of the objects stored in the cache.

Returns:
The cache name.

expire

void expire(java.lang.Object key)
Remove the mapping identified by key from the cache.

Parameters:
key - the key that needs to be removed.

expireAll

void expireAll()
Removes all mappings from the cache.



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