com.tangosol.net.cache
Class VersionedBackingMap

java.lang.Object
  java.util.AbstractMap
      com.tangosol.net.cache.ReadWriteBackingMap
          com.tangosol.net.cache.VersionedBackingMap

All Implemented Interfaces:

ObservableMap, Map

Deprecated. as of Coherence 3.2 all the functionality of this class has been superceded by the ReadWriteBackingMap implementation

public class VersionedBackingMap
extends ReadWriteBackingMap

Backing Map implementation that provides a size-limited cache of a persistent store and supports configurable write-behind caching. Additionally, this implementation supports a VersionedNearCache in front of the distributed cache, and manages version data caches to optimize the near cache without sacrificing data integrity.

This implementation does not support null keys or null values. The values stored in this Map must implement the Versionable interface.

Author:

cp 2002.10.20

Nested Class Summary

class	VersionedBackingMap.CacheStoreWrapper Deprecated. A wrapper around the original CacheStore to allow operations to be overridden and extended.
protected class	VersionedBackingMap.InternalMapListener Deprecated. A MapListener implementation that listens to the internal cache and routes those events to anyone listening to this VersionedBackingMap.

Nested classes/interfaces inherited from class com.tangosol.net.cache.ReadWriteBackingMap

ReadWriteBackingMap.CacheLoaderCacheStore, ReadWriteBackingMap.EntrySet, ReadWriteBackingMap.KeySet, ReadWriteBackingMap.ReadLatch, ReadWriteBackingMap.ReadQueue, ReadWriteBackingMap.ReadThread, ReadWriteBackingMap.ValuesCollection, ReadWriteBackingMap.WriteQueue, ReadWriteBackingMap.WriteThread

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry

Field Summary

static long

MAX_LOCK_WAIT Deprecated. The length of time (in millis) to wait on a lock; keep this value low to avoid causing timing problems since some calls will be on the distributed cache thread.

Fields inherited from class com.tangosol.net.cache.ReadWriteBackingMap

m_listenerSupport, NO_VALUE

Constructor Summary

VersionedBackingMap(BackingMapManagerContext ctxService, ObservableMap mapInternal, Map mapMisses, CacheLoader loader, NamedCache mapVersionTransient, NamedCache mapVersionPersist, boolean fManageTransient)
Deprecated. Construct a VersionedBackingMap using a CacheLoader object.

VersionedBackingMap(BackingMapManagerContext ctxService, ObservableMap mapInternal, Map mapMisses, CacheStore store, boolean fReadOnly, int cWriteBehindSeconds, double dflRefreshAheadFactor, NamedCache mapVersionTransient, NamedCache mapVersionPersist, boolean fManageTransient)
Deprecated. Construct a VersionedBackingMap using a CacheStore object.

VersionedBackingMap(BackingMapManagerContext ctxService, ObservableMap mapInternal, Map mapMisses, CacheStore store, boolean fReadOnly, int cWriteBehindSeconds, NamedCache mapVersionTransient, NamedCache mapVersionPersist, boolean fManageTransient)
Deprecated. Construct a VersionedBackingMap using a CacheStore object.

Method Summary

NamedCache	getPersistentVersionCache() Deprecated. Get the cache of version info for the data stored in the persistent store behind this backing map (and other related backing maps if this is backing a distributed cache).
NamedCache	getTransientVersionCache() Deprecated. Get the cache of version info for the data maintained in this backing map (and other related backing maps if this is backing a distributed cache).
protected ReadWriteBackingMap.CacheStoreWrapper	instantiateCacheStoreWrapper(CacheStore store) Deprecated. Factory pattern: Instantiate a CacheStore wrapper around the passed CacheStore.
protected MapListener	instantiateInternalListener() Deprecated. Factory pattern: Create a MapListener that listens to the internal cache and routes those events to anyone listening to this VersionedBackingMap.
boolean	isManagingTransientVersion() Deprecated. Determine if this backing map is responsible for keeping the transient version cache in sync.
protected void	updatePersistentVersion(Object oKey, Comparable ver) Deprecated. Update the persistent version of the specified key.
protected void	updateTransientVersion(Object oKey, Comparable ver) Deprecated. Update the transient version of the specified key.

Methods inherited from class com.tangosol.net.cache.ReadWriteBackingMap

addMapListener, addMapListener, addMapListener, clear, configureCacheStore, configureInternalCache, configureReadThread, configureWriteThread, containsKey, containsValue, entrySet, equals, flush, flush, get, getCacheStore, getContext, getControlMap, getInternalCache, getInternalListener, getInternalLocalCache, getMissesCache, getReadQueue, getReadThread, getRefreshAheadFactor, getSyntheticEventsMap, getWriteBatchFactor, getWriteBehindSeconds, getWriteQueue, getWriteRequeueThreshold, getWriteThread, hashCode, instantiateCacheLoaderCacheStore, instantiateControlMap, instantiateEntrySet, instantiateKeySet, instantiateReadLatch, instantiateReadQueue, instantiateReadThread, instantiateValuesCollection, instantiateWriteQueue, instantiateWriteThread, isActive, isReadOnly, isRefreshAhead, isRethrowExceptions, isWriteBehind, isWriteThrough, keySet, put, release, remove, removeMapListener, removeMapListener, removeMapListener, setRefreshAheadFactor, setRethrowExceptions, setWriteBatchFactor, setWriteBehindSeconds, setWriteRequeueThreshold, size, terminateReadThread, terminateWriteThread, toString, updateOnGet, updateOnPut, values

Methods inherited from class java.util.AbstractMap

clone, isEmpty, putAll

Methods inherited from interface java.util.Map

isEmpty, putAll

Field Detail

MAX_LOCK_WAIT

public static final long MAX_LOCK_WAIT

Deprecated.

The length of time (in millis) to wait on a lock; keep this value low to avoid causing timing problems since some calls will be on the distributed cache thread.

See Also:

Constant Field Values

Constructor Detail

VersionedBackingMap

public VersionedBackingMap(BackingMapManagerContext ctxService,
                           ObservableMap mapInternal,
                           Map mapMisses,
                           CacheLoader loader,
                           NamedCache mapVersionTransient,
                           NamedCache mapVersionPersist,
                           boolean fManageTransient)

Deprecated.

Construct a VersionedBackingMap using a CacheLoader object.

Parameters:

ctxService - the context provided by the CacheService which is using this backing map

mapInternal - the ObservableMap used to store the data internally in this backing map

mapMisses - the Map used to cache CacheLoader misses (optional)

loader - the object responsible for loading the cached data (optional)

mapVersionTransient - (optional) a replicated cache of versions of the cached data as it is in memory

mapVersionPersist - (optional) a replicated cache of versions of the cached data as it was written to the CacheStore

fManageTransient - if true, the backing map is responsible for keeping the transient version cache up to date; if false (as is the case when using the VersionedNearCache implementation), the backing map manages the transient version cache only for operations for which no other party is aware (such as entry expiry)

VersionedBackingMap

public VersionedBackingMap(BackingMapManagerContext ctxService,
                           ObservableMap mapInternal,
                           Map mapMisses,
                           CacheStore store,
                           boolean fReadOnly,
                           int cWriteBehindSeconds,
                           NamedCache mapVersionTransient,
                           NamedCache mapVersionPersist,
                           boolean fManageTransient)

Deprecated.

Construct a VersionedBackingMap using a CacheStore object.

Parameters:

ctxService - the context provided by the CacheService which is using this backing map

mapInternal - the ObservableMap used to store the data internally in this backing map

mapMisses - the Map used to cache CacheStore misses (optional)

store - the object responsible for the persistence of the cached data (optional)

fReadOnly - pass true to use the CacheStore only for read operations

cWriteBehindSeconds - number of seconds to write if there is a CacheStore; zero disables write-behind caching (optional)

mapVersionTransient - (optional) a replicated cache of versions of the cached data as it is in memory

mapVersionPersist - (optional) a replicated cache of versions of the cached data as it was written to the CacheStore

fManageTransient - if true, the backing map is responsible for keeping the transient version cache up to date; if false (as is the case when using the VersionedNearCache implementation), the backing map manages the transient version cache only for operations for which no other party is aware (such as entry expiry)

VersionedBackingMap

public VersionedBackingMap(BackingMapManagerContext ctxService,
                           ObservableMap mapInternal,
                           Map mapMisses,
                           CacheStore store,
                           boolean fReadOnly,
                           int cWriteBehindSeconds,
                           double dflRefreshAheadFactor,
                           NamedCache mapVersionTransient,
                           NamedCache mapVersionPersist,
                           boolean fManageTransient)

Deprecated.

Construct a VersionedBackingMap using a CacheStore object.

Parameters:

ctxService - the context provided by the CacheService which is using this backing map

mapInternal - the ObservableMap used to store the data internally in this backing map

mapMisses - the Map used to cache CacheStore misses (optional)

store - the object responsible for the persistence of the cached data (optional)

fReadOnly - pass true to use the CacheStore only for read operations

cWriteBehindSeconds - number of seconds to write if there is a CacheStore; zero disables write-behind caching (optional)

dflRefreshAheadFactor - the interval before an entry expiration time (expressed as a percentage of the internal cache expiration interval) during which an asynchronous load request for the entry will be scheduled; zero disables refresh-ahead; only applicable when the mapInternal parameter is an instance of LocalCache (optional)

mapVersionTransient - (optional) a replicated cache of versions of the cached data as it is in memory

mapVersionPersist - (optional) a replicated cache of versions of the cached data as it was written to the CacheStore

fManageTransient - if true, the backing map is responsible for keeping the transient version cache up to date; if false (as is the case when using the VersionedNearCache implementation), the backing map manages the transient version cache only for operations for which no other party is aware (such as entry expiry)

Method Detail

instantiateInternalListener

protected MapListener instantiateInternalListener()

Deprecated.

Factory pattern: Create a MapListener that listens to the internal cache and routes those events to anyone listening to this VersionedBackingMap.

Overrides:

instantiateInternalListener in class ReadWriteBackingMap

Returns:

a new routing MapListener

instantiateCacheStoreWrapper

protected ReadWriteBackingMap.CacheStoreWrapper instantiateCacheStoreWrapper(CacheStore store)

Deprecated.

Factory pattern: Instantiate a CacheStore wrapper around the passed CacheStore. (Supports CacheStore extension by delegation pattern.)

Overrides:

instantiateCacheStoreWrapper in class ReadWriteBackingMap

Parameters:

store - the CacheStore to wrap

Returns:

the CacheStoreWrapper that can supplement and override the operations of the supplied CacheStore

getPersistentVersionCache

public NamedCache getPersistentVersionCache()

Deprecated.

Get the cache of version info for the data stored in the persistent store behind this backing map (and other related backing maps if this is backing a distributed cache).

Returns:

the NamedCache object that has a "last written" version entry for each key maintained in memory by this cache, or null if the version cache is not used

updatePersistentVersion

protected void updatePersistentVersion(Object oKey,
                                       Comparable ver)

Deprecated.

Update the persistent version of the specified key.

Parameters:

oKey - the key in its external ("real") format

ver - the new version to store; null implies remove

getTransientVersionCache

public NamedCache getTransientVersionCache()

Deprecated.

Get the cache of version info for the data maintained in this backing map (and other related backing maps if this is backing a distributed cache).

Returns:

the NamedCache object that has a version entry for each key maintained in memory by this cache, or null if the version cache is not used

updateTransientVersion

protected void updateTransientVersion(Object oKey,
                                      Comparable ver)

Deprecated.

Update the transient version of the specified key.

Parameters:

oKey - the key in its external ("real") format

ver - the new version to store; null implies remove

isManagingTransientVersion

public boolean isManagingTransientVersion()

Deprecated.

Determine if this backing map is responsible for keeping the transient version cache in sync.

Returns:

true if the backing map is the object that is maintaining the transient version cache; false if it is not (e.g. if the VersionedNearCache is being used)