uwcse.location.client
Class PersonTracker

java.lang.Object
  |
  +--com.intel.research.rain.Service
        |
        +--uwcse.location.LocationService
              |
              +--uwcse.location.FusionClientService
                    |
                    +--uwcse.location.client.PersonTracker

All Implemented Interfaces:

MessageHandler

public class PersonTracker

extends FusionClientService

An example application to track and textually display the location of all Humans known to the system.

Version:

$Revision: 1.4 $

Author:

Jeffrey Hightower

Nested Class Summary

 

Nested classes inherited from class uwcse.location.LocationService

LocationService.RediscoverServices

 

Field Summary

 

Fields inherited from class uwcse.location.FusionClientService

FUSION_DISCOVERY_QUERY, m_fusionServiceIDSet

 

Fields inherited from class uwcse.location.LocationService

CONFIG_FILENAME, MESSAGE_ELEMENT, MESSAGE_EXTENSION, RPC_ELEMENT, RPC_EXCEPTION_ELEMENT, RPC_EXTENSION, RPC_RESULT_ELEMENT

 

Constructor Summary

PersonTracker(Set names)           Create a person tracker.

 

Method Summary
static void	main(String[] argv)
protected static void	printUsageAndExit()           Show the program argument usage and then exit.
protected  void	processLocationMsg(ServiceID from, LocationMsg@SubscriberExpirationMsg expMsg)           Resubscribe when we get the expiration message.
protected  void	processLocationMsg(ServiceID from, LocationMsg@SubscriberLocationReportMsg report)           Display the location reports.
protected  void	withdraw()           Supplement the inherited behavior to cancel the subscription when withdrawing from Rain.

 

Methods inherited from class uwcse.location.FusionClientService

callFusionServiceRpc, getFusionServiceIDSet

 

Methods inherited from class uwcse.location.LocationService

addObject, callLocationRpc, correctedTimeMillis, getObject, getSysclockError, handleTerminalCommand, multicastLocationMsg, multicastLocationMsgs, processLocationMsg, processLocationRpc, runTerminalCommandLoop, sendLocationMsg, sendLocationMsgs, setDescription

 

Methods inherited from class com.intel.research.rain.Service

getDaemon, getDispatcher, getServiceID, process, receive, setDaemon

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

PersonTracker

public PersonTracker(Set names)
              throws RainException,
                     LocationException

Create a person tracker.

Throws:

RainException

LocationException

processLocationMsg

protected void processLocationMsg(ServiceID from,
                                  LocationMsg@SubscriberLocationReportMsg report)

Display the location reports.

Overrides:

processLocationMsg in class LocationService

processLocationMsg

protected void processLocationMsg(ServiceID from,
                                  LocationMsg@SubscriberExpirationMsg expMsg)

Resubscribe when we get the expiration message. A real service would want to handle subscription and resubscription failures in a more robust manner using the renewal mechanisms in case this expiration notification message were dropped in the network.

Overrides:

processLocationMsg in class LocationService

withdraw

protected void withdraw()

Supplement the inherited behavior to cancel the subscription when withdrawing from Rain.

Overrides:

withdraw in class FusionClientService

printUsageAndExit

protected static void printUsageAndExit()

Show the program argument usage and then exit.

main

public static void main(String[] argv)