Package org.infinispan.expiration.impl

Class ExpirationManagerImpl<K,V>

java.lang.Object

org.infinispan.expiration.impl.ExpirationManagerImpl<K,V>

All Implemented Interfaces:

ExpirationManager<K,V>, InternalExpirationManager<K,V>

Direct Known Subclasses:

ClusterExpirationManager

@ThreadSafe
public class ExpirationManagerImpl<K,V>
extends Object
implements InternalExpirationManager<K,V>

Field Summary

Fields

Modifier and Type	Field	Description
protected String	cacheName
protected CacheNotifier<K,V>	cacheNotifier
protected ComponentRef<CommandsFactory>	cf
protected ComponentRef<InvocationContextFactory>	cfRef
protected ComponentRegistry	componentRegistry
protected Configuration	configuration
protected ComponentRef<InternalDataContainer<K,V>>	dataContainer
protected boolean	enabled
protected ScheduledExecutorService	executor
protected ScheduledFuture<?>	expirationTask
protected ConcurrentMap<K,CompletableFuture<Boolean>>	expiring	This map is used for performance reasons.
protected ComponentRef<AsyncInterceptorChain>	invokerRef
protected KeyPartitioner	keyPartitioner
protected PersistenceManager	persistenceManager
protected org.infinispan.commons.time.TimeService	timeService

Constructor Summary

Constructors

Constructor	Description
ExpirationManagerImpl()

Method Summary

Modifier and Type	Method	Description
CompletableFuture<Boolean>	entryExpiredInMemory(InternalCacheEntry<K,V> entry, long currentTime, boolean hasLock)	This should be invoked passing in an entry that is now expired.
boolean	entryExpiredInMemoryFromIteration(InternalCacheEntry<K,V> entry, long currentTime)	This method is very similar to InternalExpirationManager.entryExpiredInMemory(InternalCacheEntry, long, boolean) except that it does the bare minimum when an entry expired to guarantee if the entry is valid or not.
void	handleInMemoryExpiration(InternalCacheEntry<K,V> entry, long currentTime)	This should be invoked passing in an entry that is now expired.
CompletionStage<Void>	handleInStoreExpirationInternal(K key)	This is to be invoked when a store entry expires.
CompletionStage<Void>	handleInStoreExpirationInternal(MarshalledEntry<K,V> marshalledEntry)	This is to be invoked when a store entry expires and the value and/or metadata is available to be used.
CompletionStage<Boolean>	handlePossibleExpiration(InternalCacheEntry<K,V> ice, int segment, boolean isWrite)	Handles processing for an entry that may be expired.
boolean	isEnabled()
void	processExpiration()	Processes the expiration event queue.
void	start()
void	stop()
protected CompletionStage<Boolean>	touchEntryAndReturnIfExpired(InternalCacheEntry entry, int segment)	Response is whether the value should be treated as expired - thus if both local and remote were able to touch then the value is not expired.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.infinispan.expiration.ExpirationManager

registerWriteIncoming, unregisterWrite

Methods inherited from interface org.infinispan.expiration.impl.InternalExpirationManager

handleInStoreExpiration, handleInStoreExpiration

Field Detail

executor

protected ScheduledExecutorService executor

configuration

protected Configuration configuration

persistenceManager

protected PersistenceManager persistenceManager

dataContainer

protected ComponentRef<InternalDataContainer<K,V>> dataContainer

cacheNotifier

protected CacheNotifier<K,V> cacheNotifier

timeService

protected org.infinispan.commons.time.TimeService timeService

keyPartitioner

protected KeyPartitioner keyPartitioner

cf

protected ComponentRef<CommandsFactory> cf

invokerRef

protected ComponentRef<AsyncInterceptorChain> invokerRef

cfRef

protected ComponentRef<InvocationContextFactory> cfRef

componentRegistry

protected ComponentRegistry componentRegistry

enabled

protected boolean enabled

cacheName

protected String cacheName

expiring

protected ConcurrentMap<K,CompletableFuture<Boolean>> expiring

This map is used for performance reasons. Essentially when an expiration event should not be raised this map should be populated first. The main examples are if an expiration is about to occur for that key or the key will be removed or updated. In the latter case we don't want to send an expiration event and then a remove event when we could do just the removal.

expirationTask

protected ScheduledFuture<?> expirationTask

Constructor Detail

ExpirationManagerImpl

public ExpirationManagerImpl()

Method Detail

start

public void start()

processExpiration

public void processExpiration()

Description copied from interface: ExpirationManager

Processes the expiration event queue.

Specified by:

processExpiration in interface ExpirationManager<K,V>

isEnabled

public boolean isEnabled()

Specified by:

isEnabled in interface ExpirationManager<K,V>

Returns:

true if expiration reaper thread is enabled, false otherwise

entryExpiredInMemory

public CompletableFuture<Boolean> entryExpiredInMemory(InternalCacheEntry<K,V> entry,
                                                       long currentTime,
                                                       boolean hasLock)

Description copied from interface: InternalExpirationManager

This should be invoked passing in an entry that is now expired. This method may attempt to lock this key to preserve atomicity. This method should be invoked when an entry was read via get but found to be expired.

This method returns true if the entry was removed due to expiration or false if the entry was not removed due to expiration

If hasLock is true, this method assumes that the caller has the lock for the key and it must allow the expiration to occur, ie. returned CompletableFuture has completed, before the lock is released. Failure to do so may cause inconsistency in data.

Specified by:

entryExpiredInMemory in interface InternalExpirationManager<K,V>

Parameters:

entry - the entry that has expired

currentTime - the current time when it expired

hasLock - if the expiration was found during a write operation

Returns:

if this entry actually expired or not

entryExpiredInMemoryFromIteration

public boolean entryExpiredInMemoryFromIteration(InternalCacheEntry<K,V> entry,
                                                 long currentTime)

Description copied from interface: InternalExpirationManager

This method is very similar to InternalExpirationManager.entryExpiredInMemory(InternalCacheEntry, long, boolean) except that it does the bare minimum when an entry expired to guarantee if the entry is valid or not. This is important to reduce time spent per entry when iterating. This method may not actually remove the entry and may just return immediately if it is safe to do so.

Specified by:

entryExpiredInMemoryFromIteration in interface InternalExpirationManager<K,V>

Parameters:

entry - the entry that has expired

currentTime - the current time when it expired

Returns:

if this entry actually expired or not

handleInMemoryExpiration

public void handleInMemoryExpiration(InternalCacheEntry<K,V> entry,
                                     long currentTime)

Description copied from interface: ExpirationManager

This should be invoked passing in an entry that is now expired. This method may attempt to lock this key to preserve atomicity.

Specified by:

handleInMemoryExpiration in interface ExpirationManager<K,V>

Parameters:

entry - entry that is now expired

currentTime - the current time in milliseconds

handleInStoreExpirationInternal

public CompletionStage<Void> handleInStoreExpirationInternal(K key)

Description copied from interface: InternalExpirationManager

This is to be invoked when a store entry expires. This method may attempt to lock this key to preserve atomicity.

Note this method doesn't currently take a InternalCacheEntry and this is due to a limitation in the cache store API. This may cause some values to be removed if they were updated at the same time.

Specified by:

handleInStoreExpirationInternal in interface InternalExpirationManager<K,V>

Parameters:

key - the key of the expired entry This method will be renamed to handleInStoreExpiration when the method can be removed from ExpirationManager

handleInStoreExpirationInternal

public CompletionStage<Void> handleInStoreExpirationInternal(MarshalledEntry<K,V> marshalledEntry)

Description copied from interface: InternalExpirationManager

This is to be invoked when a store entry expires and the value and/or metadata is available to be used. This method is preferred over ExpirationManager.handleInStoreExpiration(Object) as it allows for more specific expiration to possibly occur.

Specified by:

handleInStoreExpirationInternal in interface InternalExpirationManager<K,V>

Parameters:

marshalledEntry - the entry that can be unmarshalled as needed This method will be renamed to handleInStoreExpiration when the method can be removed from ExpirationManager

handlePossibleExpiration

public CompletionStage<Boolean> handlePossibleExpiration(InternalCacheEntry<K,V> ice,
                                                         int segment,
                                                         boolean isWrite)

Description copied from interface: InternalExpirationManager

Handles processing for an entry that may be expired. This will remove the entry if it is expired, otherwise may touch if it uses max idle. The return stage will contain whether the entry was actually expired or not

Specified by:

handlePossibleExpiration in interface InternalExpirationManager<K,V>

Parameters:

ice - entry that may be expired

segment - the segment of the entry

isWrite - whether the command that saw the expired value was a write or not

Returns:

a stage that when complete will return if the entry was expired

touchEntryAndReturnIfExpired

protected CompletionStage<Boolean> touchEntryAndReturnIfExpired(InternalCacheEntry entry,
                                                                int segment)

Response is whether the value should be treated as expired - thus if both local and remote were able to touch then the value is not expired. Note this is different then the touch command's response normally as that mentions if it was touched or not

Parameters:

entry -

segment -

Returns:

stop

public void stop()