de.fhg.igd.atlas.core
Class MemoryDBEntry

java.lang.Object
  de.fhg.igd.atlas.core.MemoryDBEntry

All Implemented Interfaces:

StorageDBEntry

public class MemoryDBEntry

extends Object

implements StorageDBEntry

Entry objects which can be stored in MemoryDB databases. The implicit name is the unique identifier of an mobile object for instance the hashcode of its static part. The contact address should consist of a URL string that specifies the protocol, address, and port of a management service provided by the server, which is in possession of the specified object. The cookie is used as authorisation mechanism within the Location Service Protocol (LSP) permitting a client to update or delete an entry. The timestamp represents the last modification time in milliseconds since January 1, 1970, 00:00:00 GMT.

Version:

"$Id: MemoryDBEntry.java 1913 2007-08-08 02:41:53Z jpeters $"

Author:

Jan Peters

See Also:

StorageDBEntry

Field Summary

protected URL	contactAddress_ The contact address of this entry.
protected byte[]	cookie_ The contact address of this entry.
protected byte[]	implicitName_ The implicit name of this entry.
protected long	timestamp_ The timestamp of this entry.

Constructor Summary

MemoryDBEntry(byte[] implicitName, URL contactAddress, byte[] cookie)
Creates an instance of this class with the given implicitName, contaceAddress, cookie and timestamp.

Method Summary

URL	getContactAddress() Returns the contact address.
byte[]	getCookie() Returns the cookie.
byte[]	getImplicitName() Returns the implicit name.
long	getTimestamp() Returns the timestamp in milliseconds since January 1, 1970, 00:00:00 GMT.
void	touch() Sets the timestamp of the entry to the current time.
void	update(URL contactAddress, byte[] cookie) Updates the entry with the given contactAddress and cookie.

Methods inherited from class java.lang.Object

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

Field Detail

implicitName_

protected byte[] implicitName_

The implicit name of this entry.

contactAddress_

protected URL contactAddress_

The contact address of this entry.

cookie_

protected byte[] cookie_

The contact address of this entry.

timestamp_

protected long timestamp_

The timestamp of this entry.

Constructor Detail

MemoryDBEntry

public MemoryDBEntry(byte[] implicitName,
                     URL contactAddress,
                     byte[] cookie)

Creates an instance of this class with the given implicitName, contaceAddress, cookie and timestamp.

Parameters:

implicitName - The implicit name.

contactAddress - The contact address.

cookie - The cookie.

Method Detail

update

public void update(URL contactAddress,
                   byte[] cookie)

Updates the entry with the given contactAddress and cookie. The timestamp of the entry is set to the current time.

Specified by:

update in interface StorageDBEntry

Parameters:

contactAddress - The contact address.

cookie - The cookie.

touch

public void touch()

Sets the timestamp of the entry to the current time.

Specified by:

touch in interface StorageDBEntry

getImplicitName

public byte[] getImplicitName()

Returns the implicit name.

Specified by:

getImplicitName in interface StorageDBEntry

Returns:

The implicit name.

getContactAddress

public URL getContactAddress()

Returns the contact address.

Specified by:

getContactAddress in interface StorageDBEntry

Returns:

The contact address.

getCookie

public byte[] getCookie()

Returns the cookie.

Specified by:

getCookie in interface StorageDBEntry

Returns:

The cookie.

getTimestamp

public long getTimestamp()

Returns the timestamp in milliseconds since January 1, 1970, 00:00:00 GMT.

Specified by:

getTimestamp in interface StorageDBEntry

Returns:

The timestamp.