boris additional

1
boris - additional

• timers, scope brokering

Simon Lynch s.c.lynch_at_tees.ac.uk
2
timers

• why, what how?
• agent timers
• countdown timers
• alarm timers

3
agent timers

• Agent a new Agent( name )
• a.addAgentTimerListener( new AgentTimerListener()
• public void timerElapsed( Agent a )
• ...code body...
• )
• a.setDelay( delay )
• ...
• a.start()
• ...
• a.stop()
• ...

4
the ball example

• Agent a new Agent( "anon" )
• a.addAgentTimerListener( new AgentTimerListener()
  
• public void timerElapsed( Agent a )
• erase()
• x (xdx) bounds
• y (ydy) bounds
• display()
• )
• a.setDelay( delay )
• display()
• a.start()

5
a countdown timer

• Agent a new Agent( name )
• a.addAgentTimerListener( new AgentTimerListener()
  
• public void timerElapsed( Agent a )
• if( coundown-elapsed )
• a.stop()
• switchOff()
• else
• ...code body...
• )
• a.setDelay( delay )
• switchOn()
• a.start()

6
alarm timer

• given Calendar alarmTime...
• Agent a new Agent( name )
• a.addAgentTimerListener( new AgentTimerListener()
  
• public void timerElapsed( Agent a )
• a.stop()
• alarmOn()
• )
• long alarmMS alarmTime.getTime().getTime()
• long nowMS new Date().getTime()
• a.setDelay( alarmMS nowMS )
• if (delay gt 0 )
• a.start()
• else
• alarmOn()

7
scope

• why, what how?
• MAS partitions
• holons
• reduced complexity
• tailored partitions
• (eg localised brokers)
• enhanced security

8
scope in Boris

• why, what how?
• internal - behind portal
• local - behind router
• global - the default

9
scope
10
scope in Boris

• why, what how?
• portal.addAgent( agent )
• portal.addAgent( agent, Portal.INTERNAL )
• portal.addAgent( agent, Portal.LOCAL )

11
Brokers

• yellow pages agents
• some are localised (in holons, etc)
• some keep record of providers
• need for central service?
• in boris / java
• map agents to services
• services to agents
• etc