solar.service.directory
Class FlatDirectory

java.lang.Object
  |
  +--solar.service.directory.FlatDirectory

All Implemented Interfaces:

Directory

public class FlatDirectory

extends java.lang.Object

implements Directory

A flat directory is a hashtable with name strands as the keys. TODO: name expiration

Version:

$Id: FlatDirectory.java,v 1.5 2003/09/25 21:37:38 glchen Exp $

Author:

Guanling Chen

Nested Class Summary

(package private) class

FlatDirectory.NameInfo

Field Summary

protected java.util.Hashtable

_directory

Constructor Summary

FlatDirectory()
Constructs an empty flat name space.

Method Summary

void	addListener(Name pattern, DirectoryListener listener) Add a directory observer for the specified pattern.
NameRecord	advertise(Name name, NameRecord rec) Advertise a name to the name space.
private java.util.List	getAttributes(NameNode node)
java.util.List	lookup(Name pattern) Return a list of advertisement whose name matches the pattern.
private Name	mergeStrands(java.util.Set strands)
void	removeListener(Name pattern, DirectoryListener listener) Remove a directory observer for the specified pattern.
NameRecord	unadvertise(Name name, NameRecord rec) Unadvertise a name from the name space.
NameRecord	update(Name oldname, NameRecord oldrec, Name newname, NameRecord newrec) Update a name advertisement in the name space.

Methods inherited from class java.lang.Object

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

Field Detail

_directory

protected java.util.Hashtable _directory

Constructor Detail

FlatDirectory

public FlatDirectory()

Constructs an empty flat name space.

Method Detail

addListener

public void addListener(Name pattern,
                        DirectoryListener listener)

Description copied from interface: Directory

Add a directory observer for the specified pattern.

Specified by:

addListener in interface Directory

removeListener

public void removeListener(Name pattern,
                           DirectoryListener listener)

Description copied from interface: Directory

Remove a directory observer for the specified pattern.

Specified by:

removeListener in interface Directory

lookup

public java.util.List lookup(Name pattern)

Description copied from interface: Directory

Return a list of advertisement whose name matches the pattern.

Specified by:

lookup in interface Directory

mergeStrands

private Name mergeStrands(java.util.Set strands)

getAttributes

private java.util.List getAttributes(NameNode node)

advertise

public NameRecord advertise(Name name,
                            NameRecord rec)

Description copied from interface: Directory

Advertise a name to the name space.

Specified by:

advertise in interface Directory

Returns:

previous record if there is any.

unadvertise

public NameRecord unadvertise(Name name,
                              NameRecord rec)

Description copied from interface: Directory

Unadvertise a name from the name space.

Specified by:

unadvertise in interface Directory

Returns:

previous record if there is any.

update

public NameRecord update(Name oldname,
                         NameRecord oldrec,
                         Name newname,
                         NameRecord newrec)

Description copied from interface: Directory

Update a name advertisement in the name space.

Specified by:

update in interface Directory

Returns:

previous record if there is any.