com.hp.util.cache

Class CacheableDataType

java.lang.Object

com.hp.util.cache.CacheableDataType

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

AlphaNumericName, DataPathId, DnsName, EthernetType, ICMPv4Type, ICMPv6Type, IpAddress, IpDnsPair, IpProtocol, IpRange, MacAddress, MacPrefix, MacRange, PartialSubnet, Subnet, SubnetMask, TcpUdpPort, TcpUdpPortPair, UnsignedId

public abstract class CacheableDataType
extends Object
implements Serializable

Base class for cacheable data types.

It maintains a shared reference queue for housekeeping of GC'd data type instances. The concrete subtypes should use this reference queue instance (via the getRefQ() method) when setting up their caches.

Author:

Simon Hunt

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CacheableDataType()

Method Summary

Methods

Modifier and Type	Method and Description
protected static ReferenceQueue<CacheableDataType>	getRefQ() Provides subclasses with access to our reference queue.
protected static String	keyFromBytes(byte[] bytes) Creates a unique string key for the given byte array.

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheableDataType

public CacheableDataType()

Method Detail

getRefQ

protected static ReferenceQueue<CacheableDataType> getRefQ()

Provides subclasses with access to our reference queue. Uses lazy initialization to make sure we only create a cleaner (daemon thread) if we really need one.

Returns:

the shared reference queue

keyFromBytes

protected static String keyFromBytes(byte[] bytes)

Creates a unique string key for the given byte array.

Parameters:

bytes - the bytes

Returns:

the unique key