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Oracle® Coherence Java API Reference Release 3.6.0.0 E15725-01 |
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public interface BackingMapManager
A callback interface used by CacheService implementations. By providing a custom implementation of this interface, it is possible to use an alternative underlying store for the cached data.
A custom implementation may return a LocalCache
in order to size-restrict the cache or force automatic expiry of cached data.
Currently, the "Distributed" and "Optimistic" CacheService implementations accept custom implementations of the BackingMapManager.
If the BackingMapManager object also implements XmlConfigurable
interface then the XmlConfigurable.setConfig(XmlElement)
method on it is called every time the configuration xml is changed by other cluster members.
Very important note: all methods of this interface are called on a thread assosiated with the corresponding CacheService and any significant delay will negatively affect the performance of this service around the cluster.
CacheFactory.getDistributedCacheService(String, BackingMapManager)
, CacheFactory.getOptimisticCacheService(String, BackingMapManager)
Method Summary | |
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BackingMapManagerContext |
getContext() Determine the current BackingMapManagerContext for this BackingMapManager. |
void |
init(BackingMapManagerContext context) Called by a CacheService to indicate to this manager that the manager is being associated with the CacheService. |
Map |
instantiateBackingMap(String sName) Instantiate a [thread safe] Map that should be used by a CacheService to store cached values for a NamedCache with the specified name. |
void |
releaseBackingMap(String sName, Map map) Release the specified Map that was created using the instantiateBackingMap(String) method. |
Method Detail |
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void init(BackingMapManagerContext context)
context
- the BackingMapManagerContext object for this BackingMapManagerBackingMapManagerContext getContext()
Map instantiateBackingMap(String sName)
If the contents of the Map can be modified by anything other than the CacheService itself (e.g. if the Map automatically expires its entries periodically or size-limits its contents), then the returned object must implement the ObservableMap interface.
sName
- the name of the NamedCache for which this backing map is being createdvoid releaseBackingMap(String sName, Map map)
instantiateBackingMap(String)
method. This method is invoked by the CacheService when the CacheService no longer requires the specified Map object.sName
- the name of the NamedCache for which the specified Map object has acted as the backing mapmap
- the Map object that is being released
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Oracle® Coherence Java API Reference Release 3.6.0.0 E15725-01 |
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