Package org.infinispan.hibernate.cache.commons.access

Class NonStrictAccessDelegate

java.lang.Object

org.infinispan.hibernate.cache.commons.access.NonStrictAccessDelegate

All Implemented Interfaces:

AccessDelegate

public class NonStrictAccessDelegate
extends Object
implements AccessDelegate

Access delegate that relaxes the consistency a bit: stale reads are prohibited only after the transaction commits. This should also be able to work with async caches, and that would allow the replication delay even after the commit.

Author:

Radim Vansa <rvansa@redhat.com>

Field Summary

Fields

Modifier and Type	Field	Description
protected final InfinispanDataRegion	region
protected final org.infinispan.functional.FunctionalMap.ReadWriteMap<Object,Object>	writeMap

Constructor Summary

Constructors

Constructor	Description
NonStrictAccessDelegate(InfinispanDataRegion region, Comparator versionComparator)

Method Summary

Modifier and Type	Method	Description
boolean	afterInsert(Object session, Object key, Object value, Object version)	Called after an item has been inserted (after the transaction completes), instead of calling release().
boolean	afterUpdate(Object session, Object key, Object value, Object currentVersion, Object previousVersion, org.hibernate.cache.spi.access.SoftLock lock)	Called after an item has been updated (after the transaction completes), instead of calling release().
void	evict(Object key)	Forcibly evict an item from the cache immediately without regard for transaction isolation.
void	evictAll()	Forcibly evict all items from the cache immediately without regard for transaction isolation.
Object	get(Object session, Object key, long txTimestamp)
protected Object	getVersion(Object value)
boolean	insert(Object session, Object key, Object value, Object version)	Called after an item has been inserted (before the transaction completes), instead of calling evict().
void	lockAll()	Called just before the delegate will have all entries removed.
boolean	putFromLoad(Object session, Object key, Object value, long txTimestamp, Object version)	Attempt to cache an object, after loading from the database.
boolean	putFromLoad(Object session, Object key, Object value, long txTimestamp, Object version, boolean minimalPutOverride)	Attempt to cache an object, after loading from the database, explicitly specifying the minimalPut behavior.
void	remove(Object session, Object key)	Called after an item has become stale (before the transaction completes).
void	removeAll()	Called to evict data from the entire region
void	unlockAll()	Called just after the delegate had all entries removed via AccessDelegate.removeAll().
void	unlockItem(Object session, Object key)	Called when we have finished the attempted update/delete (which may or may not have been successful), after transaction completion.
boolean	update(Object session, Object key, Object value, Object currentVersion, Object previousVersion)	Called after an item has been updated (before the transaction completes), instead of calling evict().

Methods inherited from class java.lang.Object

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

Field Details

region

protected final InfinispanDataRegion region

writeMap

protected final org.infinispan.functional.FunctionalMap.ReadWriteMap<Object,Object> writeMap

Constructor Details

NonStrictAccessDelegate

public NonStrictAccessDelegate(InfinispanDataRegion region,
 Comparator versionComparator)

Method Details

get

public Object get(Object session,
 Object key,
 long txTimestamp)
           throws org.hibernate.cache.CacheException

Specified by:

get in interface AccessDelegate

Throws:

org.hibernate.cache.CacheException

putFromLoad

public boolean putFromLoad(Object session,
 Object key,
 Object value,
 long txTimestamp,
 Object version)

Description copied from interface: AccessDelegate

Attempt to cache an object, after loading from the database.

Specified by:

putFromLoad in interface AccessDelegate

Parameters:

session - Current session

key - The item key

value - The item

txTimestamp - a timestamp prior to the transaction start time

version - the item version number

Returns:

true if the object was successfully cached

putFromLoad

public boolean putFromLoad(Object session,
 Object key,
 Object value,
 long txTimestamp,
 Object version,
 boolean minimalPutOverride)
                    throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Attempt to cache an object, after loading from the database, explicitly specifying the minimalPut behavior.

Specified by:

putFromLoad in interface AccessDelegate

Parameters:

session - Current session.

key - The item key

value - The item

txTimestamp - a timestamp prior to the transaction start time

version - the item version number

minimalPutOverride - Explicit minimalPut flag

Returns:

true if the object was successfully cached

Throws:

org.hibernate.cache.CacheException - Propogated from underlying Region

insert

public boolean insert(Object session,
 Object key,
 Object value,
 Object version)
               throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called after an item has been inserted (before the transaction completes), instead of calling evict().

Specified by:

insert in interface AccessDelegate

Parameters:

session - Current session

key - The item key

value - The item

version - The item's version value

Returns:

Were the contents of the cache actual changed by this operation?

Throws:

org.hibernate.cache.CacheException - if the insert fails

update

public boolean update(Object session,
 Object key,
 Object value,
 Object currentVersion,
 Object previousVersion)
               throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called after an item has been updated (before the transaction completes), instead of calling evict().

Specified by:

update in interface AccessDelegate

Parameters:

session - Current session

key - The item key

value - The item

currentVersion - The item's current version value

previousVersion - The item's previous version value

Returns:

Whether the contents of the cache actual changed by this operation

Throws:

org.hibernate.cache.CacheException - if the update fails

remove

public void remove(Object session,
 Object key)
            throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called after an item has become stale (before the transaction completes).

Specified by:

remove in interface AccessDelegate

Parameters:

session - Current session

key - The key of the item to remove

Throws:

org.hibernate.cache.CacheException - if removing the cached item fails

lockAll

public void lockAll()
             throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called just before the delegate will have all entries removed. Any work to prevent concurrent modifications while this occurs should happen here

Specified by:

lockAll in interface AccessDelegate

Throws:

org.hibernate.cache.CacheException - if locking had an issue

unlockAll

public void unlockAll()
               throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called just after the delegate had all entries removed via AccessDelegate.removeAll(). Any work required to allow for new modifications to happen should be done here

Specified by:

unlockAll in interface AccessDelegate

Throws:

org.hibernate.cache.CacheException - if unlocking had an issue

removeAll

public void removeAll()
               throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called to evict data from the entire region

Specified by:

removeAll in interface AccessDelegate

Throws:

org.hibernate.cache.CacheException - if eviction the region fails

evict

public void evict(Object key)
           throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Forcibly evict an item from the cache immediately without regard for transaction isolation.

Specified by:

evict in interface AccessDelegate

Parameters:

key - The key of the item to remove

Throws:

org.hibernate.cache.CacheException - if evicting the item fails

evictAll

public void evictAll()
              throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Forcibly evict all items from the cache immediately without regard for transaction isolation.

Specified by:

evictAll in interface AccessDelegate

Throws:

org.hibernate.cache.CacheException - if evicting items fails

unlockItem

public void unlockItem(Object session,
 Object key)
                throws org.hibernate.cache.CacheException

Description copied from interface: AccessDelegate

Called when we have finished the attempted update/delete (which may or may not have been successful), after transaction completion. This method is used by "asynchronous" concurrency strategies.

Specified by:

unlockItem in interface AccessDelegate

key - The item key

Throws:

org.hibernate.cache.CacheException - Propogated from underlying Region

afterInsert

public boolean afterInsert(Object session,
 Object key,
 Object value,
 Object version)

Description copied from interface: AccessDelegate

Called after an item has been inserted (after the transaction completes), instead of calling release(). This method is used by "asynchronous" concurrency strategies.

Specified by:

afterInsert in interface AccessDelegate

key - The item key

value - The item

version - The item's version value

Returns:

Were the contents of the cache actual changed by this operation?

afterUpdate

public boolean afterUpdate(Object session,
 Object key,
 Object value,
 Object currentVersion,
 Object previousVersion,
 org.hibernate.cache.spi.access.SoftLock lock)

Description copied from interface: AccessDelegate

Called after an item has been updated (after the transaction completes), instead of calling release(). This method is used by "asynchronous" concurrency strategies.

Specified by:

afterUpdate in interface AccessDelegate

key - The item key

value - The item

currentVersion - The item's current version value

previousVersion - The item's previous version value

lock - The lock previously obtained from #lockItem

Returns:

Were the contents of the cache actual changed by this operation?

getVersion

protected Object getVersion(Object value)