org.glassfish.ha.store.impl

Class NoOpBackingStore<K extends Serializable,V extends Serializable>

java.lang.Object

org.glassfish.ha.store.api.BackingStore<K,V>

org.glassfish.ha.store.impl.NoOpBackingStore<K,V>

public class NoOpBackingStore<K extends Serializable,V extends Serializable>
extends BackingStore<K,V>

Author:

Mahesh Kannan

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy() Called when the store is no longer needed.
BackingStoreFactory	getBackingStoreFactory()
protected void	initialize(BackingStoreConfiguration<K,V> conf)
V	load(K key, String version) Load and return the data for the given id.
void	remove(K key) Remove the association for the id.
int	removeExpired() Remove expired entries
String	save(K key, V value, boolean isNew) Save the value whose key is id.
int	size() Get the current size of the store
String	updateTimestamp(K key, String version, Long accessTime) Recomended way is to just do a save(k, v)

Methods inherited from class org.glassfish.ha.store.api.BackingStore

close, createObjectInputStream, createObjectOutputStream, getBackingStoreConfiguration, removeExpired, updateTimestamp

Methods inherited from class java.lang.Object

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

Method Detail

initialize

protected void initialize(BackingStoreConfiguration<K,V> conf)
                   throws BackingStoreException

Overrides:

initialize in class BackingStore<K extends Serializable,V extends Serializable>

Throws:

BackingStoreException

getBackingStoreFactory

public BackingStoreFactory getBackingStoreFactory()

Specified by:

getBackingStoreFactory in class BackingStore<K extends Serializable,V extends Serializable>

load

public V load(K key,
     String version)
                            throws BackingStoreException

Description copied from class: BackingStore

Load and return the data for the given id. The store is expected to return the largest ever version that was saved in the stored using the save() method.

Specified by:

load in class BackingStore<K extends Serializable,V extends Serializable>

Parameters:

key - the key whose value must be returned

Returns:

the value if this store contains it or null. The implementation must return the exact same type as that was passed to it in the save method.

Throws:

BackingStoreException - if the underlying store implementation encounters any exception

save

public String save(K key,
          V value,
          boolean isNew)
            throws BackingStoreException

Description copied from class: BackingStore

Save the value whose key is id. The store is NOT expected to throw an exception if isNew is false but the entry doesn't exist in the store. (This is possible in some implementations (like in-memory) where packets could be lost.)

Specified by:

save in class BackingStore<K extends Serializable,V extends Serializable>

Parameters:

key - the id

value - The Metadata to be stored

Returns:

A (possibly null) String indicating the instance name where the data was saved.

Throws:

BackingStoreException - if the underlying store implementation encounters any exception

remove

public void remove(K key)
            throws BackingStoreException

Description copied from class: BackingStore

Remove the association for the id.

After this call, any call to load(id) must return null. In addition, any association between id and container extra params must also be removed.

Specified by:

remove in class BackingStore<K extends Serializable,V extends Serializable>

Parameters:

key - the id of the Metadata

Throws:

BackingStoreException - if the underlying store implementation encounters any exception

updateTimestamp

public String updateTimestamp(K key,
                     String version,
                     Long accessTime)
                       throws BackingStoreException

Description copied from class: BackingStore

Recomended way is to just do a save(k, v)

Overrides:

updateTimestamp in class BackingStore<K extends Serializable,V extends Serializable>

Throws:

BackingStoreException

removeExpired

public int removeExpired()
                  throws BackingStoreException

Description copied from class: BackingStore

Remove expired entries

Overrides:

removeExpired in class BackingStore<K extends Serializable,V extends Serializable>

Throws:

BackingStoreException

size

public int size()
         throws BackingStoreException

Description copied from class: BackingStore

Get the current size of the store

Specified by:

size in class BackingStore<K extends Serializable,V extends Serializable>

Returns:

the (approximate) number of entries in the store

Throws:

BackingStoreException - if the underlying store implementation encounters any exception

destroy

public void destroy()
             throws BackingStoreException

Description copied from class: BackingStore

Called when the store is no longer needed. Must clean up and close any opened resources. The store must not be used after this call.

Overrides:

destroy in class BackingStore<K extends Serializable,V extends Serializable>

Throws:

BackingStoreException