Package org.shoal.ha.cache.impl.store

Class ReplicatedDataStore<K,V extends Serializable>

java.lang.Object

org.shoal.ha.cache.impl.store.ReplicatedDataStore<K,V>

All Implemented Interfaces:

DataStore<K,V>

public class ReplicatedDataStore<K,V extends Serializable>
extends Object
implements DataStore<K,V>

Author:

Mahesh Kannan

Constructor Summary

Constructors

Constructor	Description
ReplicatedDataStore(DataStoreContext<K,V> conf, GroupService gs)

Method Summary

Modifier and Type	Method	Description
void	close()	Close this datastore.
void	destroy()
V	get(K key)	Returns the value to which the specified key is mapped in this cache.
DataStoreContext<K,V>	getDataStoreContext()
String	put(K k, V v)	Creates or Replaces the object associated with key k.
void	remove(K k)	Removes the mapping between the key and the object.
int	removeIdleEntries(long idleFor)	Removes all entries that were not accessed for more than 'idlefor' millis
int	size()
String	touch(K k, long version, long ts, long ttl)	Updates the timestamp associated with this entry.

Methods inherited from class java.lang.Object

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

Constructor Detail

ReplicatedDataStore

public ReplicatedDataStore(DataStoreContext<K,V> conf,
                           GroupService gs)

Method Detail

getDataStoreContext

public DataStoreContext<K,V> getDataStoreContext()

put

public String put(K k,
                  V v)
           throws DataStoreException

Description copied from interface: DataStore

Creates or Replaces the object associated with key k.

Specified by:

put in interface DataStore<K,V extends Serializable>

Parameters:

k - The Key

v - The value. The value must be either serializable of the DataStoreEntryHelper that is associated with this cache must be able to transform this into a serializable.

Throws:

DataStoreException

get

public V get(K key)
      throws DataStoreException

Description copied from interface: DataStore

Returns the value to which the specified key is mapped in this cache.

Specified by:

get in interface DataStore<K,V extends Serializable>

Parameters:

key - The key

Returns:

The value if the association exists or null.

Throws:

DataStoreException

remove

public void remove(K k)
            throws DataStoreException

Description copied from interface: DataStore

Removes the mapping between the key and the object.

Specified by:

remove in interface DataStore<K,V extends Serializable>

Parameters:

k - The key

Throws:

DataStoreException

touch

public String touch(K k,
                    long version,
                    long ts,
                    long ttl)
             throws DataStoreException

Description copied from interface: DataStore

Updates the timestamp associated with this entry. see #{removeIdleEntries}

Specified by:

touch in interface DataStore<K,V extends Serializable>

Parameters:

k - The key

Throws:

DataStoreException

removeIdleEntries

public int removeIdleEntries(long idleFor)

Description copied from interface: DataStore

Removes all entries that were not accessed for more than 'idlefor' millis

Specified by:

removeIdleEntries in interface DataStore<K,V extends Serializable>

Parameters:

idleFor - Time in milli seconds

close

public void close()

Description copied from interface: DataStore

Close this datastore. This causes all data to be removed(?)

Specified by:

close in interface DataStore<K,V extends Serializable>

destroy

public void destroy()

Specified by:

destroy in interface DataStore<K,V extends Serializable>

size

public int size()

Specified by:

size in interface DataStore<K,V extends Serializable>