|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object org.apache.openjpa.datacache.DelegatingDataCache
public class DelegatingDataCache
Delegating data cache that can also perform exception translation for use in facades. This cache allows its delegate to be null, in which case it returns default values for all operations.
Field Summary |
---|
Fields inherited from interface org.apache.openjpa.datacache.DataCache |
---|
NAME_DEFAULT |
Constructor Summary | |
---|---|
DelegatingDataCache(DataCache cache)
Constructor. |
|
DelegatingDataCache(DataCache cache,
RuntimeExceptionTranslator trans)
|
Method Summary | |
---|---|
void |
addExpirationListener(ExpirationListener listen)
Add a new expiration event listener to this cache. |
void |
clear()
Remove all data from this cache. |
void |
close()
Free the resources used by this cache. |
void |
commit(Collection additions,
Collection newUpdates,
Collection existingUpdates,
Collection deletes)
Perform a batch update of the cache. |
boolean |
contains(Object oid)
Returns true if this cache contains data
corresponding to oid ; otherwise returns
false . |
BitSet |
containsAll(Collection oids)
Returns the indexes of the oids in this cache. |
boolean |
equals(Object other)
|
DataCachePCData |
get(Object oid)
Return the cached object for the given oid. |
Map |
getAll(List keys)
returns objects from the caches for a given list of keys |
DataCache |
getDelegate()
Return the direct delegate. |
DataCache |
getInnermostDelegate()
Return the native delegate. |
String |
getName()
Returns a string name that can be used by end-user-visible code to identify this cache. |
int |
hashCode()
|
void |
initialize(DataCacheManager manager)
Initialize any resources associated with the given DataCacheManager . |
boolean |
pin(Object oid)
Pin the value stored under oid into the cache. |
void |
pinAll(Class cls,
boolean subs)
Pin all oids for the given type. |
BitSet |
pinAll(Collection oids)
Pin all oids to the cache. |
DataCachePCData |
put(DataCachePCData value)
Set the cached value for the given instance. |
DataCachePCData |
remove(Object oid)
Remove the value stored under the given oid. |
void |
removeAll(Class cls,
boolean subclasses)
Evict all values of a specified type. |
BitSet |
removeAll(Collection oids)
Remove the values stored under the given oids. |
boolean |
removeExpirationListener(ExpirationListener listen)
Remove an expiration event listener from this cache. |
void |
setName(String name)
Sets a string name to be used to identify this cache to end-user needs. |
protected RuntimeException |
translate(RuntimeException re)
Translate the OpenJPA exception. |
boolean |
unpin(Object oid)
Unpin the value stored under oid from the cache. |
void |
unpinAll(Class cls,
boolean subs)
Unpin all oids associaed with the given type from the cache. |
BitSet |
unpinAll(Collection oids)
Unpin all oids from the cache. |
void |
update(DataCachePCData value)
Update the cached value for the given instance. |
void |
writeLock()
Obtain a write lock on the cache. |
void |
writeUnlock()
Release the write lock on the cache. |
Methods inherited from class java.lang.Object |
---|
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public DelegatingDataCache(DataCache cache)
public DelegatingDataCache(DataCache cache, RuntimeExceptionTranslator trans)
Method Detail |
---|
public DataCache getDelegate()
public DataCache getInnermostDelegate()
public int hashCode()
hashCode
in class Object
public boolean equals(Object other)
equals
in class Object
protected RuntimeException translate(RuntimeException re)
public String getName()
DataCache
getName
in interface DataCache
public void setName(String name)
DataCache
setName
in interface DataCache
public void initialize(DataCacheManager manager)
DataCache
DataCacheManager
.
initialize
in interface DataCache
public void commit(Collection additions, Collection newUpdates, Collection existingUpdates, Collection deletes)
DataCache
DataCachePCData
objects in additions
and in
newUpdates
, make the appropriate modifications to
all DataCachePCDatas in existingUpdates
, and delete all
OIDs in deletes
.
All changes made to cached data must be made via this
method. It is this method that is responsible for performing
any side-effects that should happen on meaningful cache changes.
Implementations should bear in mind that the
deletes
collection may contain oids that are also
in the additions
map. This is possible because it
is valid for a user to delete an object with a particular oid
and then add that object in the same batch.
commit
in interface DataCache
additions
- A collection of DataCachePCData
objects.
These represent data that have been newly created,
and thus must be added to the cache.newUpdates
- A collection of DataCachePCData
objects.
These represent data that have been modified but
were not originally in the cache, and thus must be added to the cache.existingUpdates
- A collection of DataCachePCData
objects.
These represent data that have been modified and
were originally loaded from the cache. It is
up to the cache implementation to decide if
these values must be re-enlisted in the cache.
Some caches may return live data from DataCache.get(java.lang.Object)
invocations, in which case these values need not be re-enlisted.deletes
- A collection of object IDs that have been deleted
and must therefore be dropped from the cache.public boolean contains(Object oid)
DataCache
true
if this cache contains data
corresponding to oid
; otherwise returns
false
.
contains
in interface DataCache
public BitSet containsAll(Collection oids)
DataCache
containsAll
in interface DataCache
public DataCachePCData get(Object oid)
DataCache
DataCache.update(org.apache.openjpa.datacache.DataCachePCData)
method should be used to re-cache any changed objects.
get
in interface DataCache
public DataCachePCData put(DataCachePCData value)
DataCache
DataCache.commit(java.util.Collection, java.util.Collection, java.util.Collection, java.util.Collection)
method.
put
in interface DataCache
null
if
the value was not previously cached. See Map.put(K, V)
for more information.public void update(DataCachePCData value)
DataCache
DataCache.commit(java.util.Collection, java.util.Collection, java.util.Collection, java.util.Collection)
method.
A cache implementation may or may not return a live object
from DataCache.get(java.lang.Object)
invocations. If an object retrieved from a
DataCache.get(java.lang.Object)
operation needs to be updated, this method can be
invoked instead of invoking DataCache.put(org.apache.openjpa.datacache.DataCachePCData)
. The DataCache implementation
can then make optimizations based on how its DataCache.get(java.lang.Object)
method works.
update
in interface DataCache
public DataCachePCData remove(Object oid)
DataCache
DataCache.commit(java.util.Collection, java.util.Collection, java.util.Collection, java.util.Collection)
method.
remove
in interface DataCache
null
if
the oid was not previously cached. See Map.remove(java.lang.Object)
for more information.public BitSet removeAll(Collection oids)
DataCache
removeAll
in interface DataCache
DataCache.remove(java.lang.Object)
public void removeAll(Class cls, boolean subclasses)
DataCache
removeAll
in interface DataCache
public void clear()
DataCache
DataCache.commit(java.util.Collection, java.util.Collection, java.util.Collection, java.util.Collection)
method.
clear
in interface DataCache
public boolean pin(Object oid)
DataCache
oid
into the cache.
This method guarantees that oid
's value will not
be dropped by the caching algorithm. This method does not
affect the behavior of DataCache.remove(java.lang.Object)
.
pin
in interface DataCache
true
if oid
's value was
pinned into the cache; false
if the oid is not in the cache.public BitSet pinAll(Collection oids)
DataCache
pinAll
in interface DataCache
DataCache.pin(java.lang.Object)
public void pinAll(Class cls, boolean subs)
DataCache
pinAll
in interface DataCache
subs
- Whether to include subclasses.public boolean unpin(Object oid)
DataCache
oid
from the cache.
This method reverses a previous invocation of DataCache.pin(java.lang.Object)
.
This method does not remove anything from the cache; it merely
makes oid
's value a candidate for flushing from the cache.
unpin
in interface DataCache
true
if oid
's value was
unpinned from the cache; false
if the
oid is not in the cache.public BitSet unpinAll(Collection oids)
DataCache
unpinAll
in interface DataCache
DataCache.unpin(java.lang.Object)
public void unpinAll(Class cls, boolean subs)
DataCache
unpinAll
in interface DataCache
subs
- Whether to include subclasses.public void writeLock()
DataCache
writeLock
in interface DataCache
public void writeUnlock()
DataCache
writeUnlock
in interface DataCache
public void addExpirationListener(ExpirationListener listen)
DataCache
addExpirationListener
in interface DataCache
public boolean removeExpirationListener(ExpirationListener listen)
DataCache
removeExpirationListener
in interface DataCache
public void close()
DataCache
close
in interface DataCache
close
in interface Closeable
public Map getAll(List keys)
DataCache
getAll
in interface DataCache
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |