Package com.tangosol.coherence.jcache.common

Class JCacheEntryMetaInf

java.lang.Object

com.tangosol.coherence.jcache.common.JCacheEntryMetaInf

All Implemented Interfaces:

ExternalizableLite, PortableObject, Serializable

public class JCacheEntryMetaInf
extends Object
implements ExternalizableLite, PortableObject

Represents the JCache metadata for a key and value pair stored in a Cache.

The meta info is stored as a Coherence decoration on the value in ParitionedCache}. The meta info is a member of a LocalCacheValue;

JCacheEntryMetaInfs store and provide meta information about a Cache Entry, including information for dealing with expiry.

Since:

Coherence 12.1.3

Author:

jf 2013.10.24

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
JCacheEntryMetaInf()	Constructs a JCacheEntryMetaInf.
JCacheEntryMetaInf(long ldtCreated, javax.cache.expiry.ExpiryPolicy expiryPolicy)	Constructs an JCacheEntryMetaInf.
JCacheEntryMetaInf(JCacheEntryMetaInf metaInf)	Copy constructor

Method Summary

Modifier and Type	Method	Description
void	accessed(long ldtAccessed, javax.cache.expiry.ExpiryPolicy expiryPolicy)	Update the JCacheEntryMetaInf based on the associated entry being accessed at the specified time.
long	getAccessCount()	Gets the number of times the internal value has been accessed.
long	getAccessTime()	Gets the time (since the Epoc) in milliseconds since the internal value was last accessed.
long	getCreationTime()	Gets the time (since the Epoc) in milliseconds since the internal value was created.
long	getExpiryTime()	Gets the time (since the Epoc) in milliseconds when the Cache Entry associated with this value should be considered expired.
long	getModificationCount()	Gets the number of times the internal value has been modified (set)
long	getModificationTime()	Gets the time (since the Epoc) in milliseconds since the internal value was last modified.
boolean	isExpiredAt(long now)	Determines if the Cache Entry associated with this value would be expired at the specified time
void	modified(long ldtModified, javax.cache.expiry.ExpiryPolicy expiryPolicy)	Update the JCacheEntryMetaInf based on the associated entry being modified at the specified time.
void	readExternal(PofReader pofReader)	Restore the contents of a user type instance by reading its state using the specified PofReader object.
void	readExternal(DataInput dataInput)	read from datainput
void	setAccessTime(long accessTime)	Gets the internal value with the side-effect of updating the access time to that which is specified and incrementing the access count.
void	setExpiryTime(long expiryTime)	Sets the time (since the Epoc) in milliseconds when the Cache Entry associated with this value should be considered expired.
void	setModificationTime(long modificationTime)	Sets update the modification time for the meta data for a key and value pair.
String	toString()
void	writeExternal(PofWriter pofWriter)	Save the contents of a POF user type instance by writing its state using the specified PofWriter object.
void	writeExternal(DataOutput dataOutput)	write to

Methods inherited from class java.lang.Object

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

Constructor Detail

JCacheEntryMetaInf

public JCacheEntryMetaInf()

Constructs a JCacheEntryMetaInf.

JCacheEntryMetaInf

public JCacheEntryMetaInf(JCacheEntryMetaInf metaInf)

Copy constructor

Parameters:

metaInf -

JCacheEntryMetaInf

public JCacheEntryMetaInf(long ldtCreated,
                          javax.cache.expiry.ExpiryPolicy expiryPolicy)

Constructs an JCacheEntryMetaInf.

Parameters:

ldtCreated - the time when the cache entry was created

expiryPolicy - the ExpiryPolicy to determine the expiry time

Method Detail

getCreationTime

public long getCreationTime()

Gets the time (since the Epoc) in milliseconds since the internal value was created.

Returns:

time in milliseconds (since the Epoc)

getAccessTime

public long getAccessTime()

Gets the time (since the Epoc) in milliseconds since the internal value was last accessed.

Returns:

time in milliseconds (since the Epoc)

getAccessCount

public long getAccessCount()

Gets the number of times the internal value has been accessed.

Returns:

the access count

getModificationTime

public long getModificationTime()

Gets the time (since the Epoc) in milliseconds since the internal value was last modified.

Returns:

time in milliseconds (since the Epoc)

getModificationCount

public long getModificationCount()

Gets the number of times the internal value has been modified (set)

Returns:

the modification count

getExpiryTime

public long getExpiryTime()

Gets the time (since the Epoc) in milliseconds when the Cache Entry associated with this value should be considered expired.

Returns:

time in milliseconds (since the Epoc)

setExpiryTime

public void setExpiryTime(long expiryTime)

Sets the time (since the Epoc) in milliseconds when the Cache Entry associated with this value should be considered expired.

Parameters:

expiryTime - time in milliseconds (since the Epoc)

isExpiredAt

public boolean isExpiredAt(long now)

Determines if the Cache Entry associated with this value would be expired at the specified time

Parameters:

now - time in milliseconds (since the Epoc)

Returns:

true if the value would be expired at the specified time

setAccessTime

public void setAccessTime(long accessTime)

Gets the internal value with the side-effect of updating the access time to that which is specified and incrementing the access count.

Parameters:

accessTime - the time when the related value was accessed

setModificationTime

public void setModificationTime(long modificationTime)

Sets update the modification time for the meta data for a key and value pair. Incrementing the modification count. * @param m_ldtModification the time when the value was modified

accessed

public void accessed(long ldtAccessed,
                     javax.cache.expiry.ExpiryPolicy expiryPolicy)

Update the JCacheEntryMetaInf based on the associated entry being accessed at the specified time.

Parameters:

ldtAccessed - the time the entry was accessed

expiryPolicy - the ExpiryPolicy for the Cache

modified

public void modified(long ldtModified,
                     javax.cache.expiry.ExpiryPolicy expiryPolicy)

Update the JCacheEntryMetaInf based on the associated entry being modified at the specified time.

Parameters:

ldtModified - the time the entry was accessed

expiryPolicy - the ExpiryPolicy for the Cache

readExternal

public void readExternal(DataInput dataInput)
                  throws IOException

read from datainput

Specified by:

readExternal in interface ExternalizableLite

Parameters:

dataInput -

Throws:

IOException

NotActiveException - if the object is not in its initial state, and therefore cannot be deserialized into

writeExternal

public void writeExternal(DataOutput dataOutput)
                   throws IOException

write to

Specified by:

writeExternal in interface ExternalizableLite

Parameters:

dataOutput -

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object

readExternal

public void readExternal(PofReader pofReader)
                  throws IOException

Description copied from interface: PortableObject

Restore the contents of a user type instance by reading its state using the specified PofReader object.

Specified by:

readExternal in interface PortableObject

Parameters:

pofReader - the PofReader from which to read the object's state

Throws:

IOException - if an I/O error occurs

writeExternal

public void writeExternal(PofWriter pofWriter)
                   throws IOException

Description copied from interface: PortableObject

Save the contents of a POF user type instance by writing its state using the specified PofWriter object.

Specified by:

writeExternal in interface PortableObject

Parameters:

pofWriter - the PofWriter to which to write the object's state

Throws:

IOException - if an I/O error occurs