net.vattp.vls
Class VatLocationServer

java.lang.Object
  |
  +--net.vattp.vls.VatLocationServer

All Implemented Interfaces:

VatLocationLookup

class VatLocationServer

extends Object

implements VatLocationLookup

A vat location server, which maintains a collection of the locations of E vats which it can lookup on demand.

These registrations have a finite lifetime which we also manage here. In order to better decouple issues during this stage of development, this version is no longer persistent.

XXX The VLS must be registered under swiss number 0 so it can respond, as an E object, to registrations (and unregistrations?).

XXX The VLS must be registered by setVatLocationLookup to listen on port 0 for location queries.

Author:

Eris Messick, Bill Frantz, Chip Morningstar, Mark Miller

Field Summary

private static int	MINUTE
private FlexMap	myRegistrations Collection of current registrations
private Timer	myTimer Can be transient or persistent, depending on policy
private static String[]	NO_LOCATIONS
private static int	REG_DURATION

Constructor Summary

VatLocationServer(Timer timer)
Construct a vat location server.

Method Summary

String[]	getLocations(String vatID) XXX Will currently only return either a zero or a one element array.
void	put(String vatID, String searchPath) Add a new vat to the registry.

Methods inherited from class java.lang.Object

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

Field Detail

myRegistrations

private final FlexMap myRegistrations

Collection of current registrations

myTimer

private final Timer myTimer

Can be transient or persistent, depending on policy

MINUTE

private static final int MINUTE

REG_DURATION

private static final int REG_DURATION

NO_LOCATIONS

private static final String[] NO_LOCATIONS

Constructor Detail

VatLocationServer

public VatLocationServer(Timer timer)

Construct a vat location server.

Since, in this version, we are only starting from scratch, it makes a new empty registration collection.

Method Detail

getLocations

public String[] getLocations(String vatID)

XXX Will currently only return either a zero or a one element array.

Specified by:

getLocations in interface VatLocationLookup

Returns:

is the locations the requestor should try next

put

public void put(String vatID,
                String searchPath)

Add a new vat to the registry.

Parameters:

vatID - Vat ID of vat being added

searchPath - Were in the world to find it