javax.jmdns.impl.tasks.state
Class Prober

java.lang.Object
  java.util.TimerTask
      javax.jmdns.impl.tasks.DNSTask
          javax.jmdns.impl.tasks.state.DNSStateTask
              javax.jmdns.impl.tasks.state.Prober

All Implemented Interfaces:

Runnable

public class Prober
extends DNSStateTask

The Prober sends three consecutive probes for all service infos that needs probing as well as for the host name. The state of each service info of the host name is advanced, when a probe has been sent for it. When the prober has run three times, it launches an Announcer.

If a conflict during probes occurs, the affected service infos (and affected host name) are taken away from the prober. This eventually causes the prober to cancel itself.

Constructor Summary

Prober(JmDNSImpl jmDNSImpl)

Method Summary

protected void	advanceTask()
protected DNSOutgoing	buildOutgoingForDNS(DNSOutgoing out)
protected DNSOutgoing	buildOutgoingForInfo(ServiceInfoImpl info, DNSOutgoing out)
boolean	cancel()
protected boolean	checkRunCondition()
protected DNSOutgoing	createOugoing()
String	getName() Return this task name.
String	getTaskDescription()
protected void	recoverTask(Throwable e)
void	start(Timer timer) Start this task.
String	toString()

Methods inherited from class javax.jmdns.impl.tasks.state.DNSStateTask

advanceObjectsState, associate, defaultTTL, getTaskState, getTTL, removeAssociation, run, setDefaultTTL, setTaskState

Methods inherited from class javax.jmdns.impl.tasks.DNSTask

addAdditionalAnswer, addAnswer, addAnswer, addAuthoritativeAnswer, addQuestion, getDns

Methods inherited from class java.util.TimerTask

scheduledExecutionTime

Methods inherited from class java.lang.Object

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

Constructor Detail

Prober

public Prober(JmDNSImpl jmDNSImpl)

Method Detail

getName

public String getName()

Description copied from class: DNSTask

Return this task name.

Specified by:

getName in class DNSTask

Returns:

task name

toString

public String toString()

Overrides:

toString in class DNSTask

start

public void start(Timer timer)

Description copied from class: DNSTask

Start this task.

Specified by:

start in class DNSTask

Parameters:

timer - task timer.

cancel

public boolean cancel()

Overrides:

cancel in class TimerTask

getTaskDescription

public String getTaskDescription()

Specified by:

getTaskDescription in class DNSStateTask

checkRunCondition

protected boolean checkRunCondition()

Specified by:

checkRunCondition in class DNSStateTask

createOugoing

protected DNSOutgoing createOugoing()

Specified by:

createOugoing in class DNSStateTask

buildOutgoingForDNS

protected DNSOutgoing buildOutgoingForDNS(DNSOutgoing out)
                                   throws IOException

Specified by:

buildOutgoingForDNS in class DNSStateTask

Throws:

IOException

buildOutgoingForInfo

protected DNSOutgoing buildOutgoingForInfo(ServiceInfoImpl info,
                                           DNSOutgoing out)
                                    throws IOException

Specified by:

buildOutgoingForInfo in class DNSStateTask

Throws:

IOException

recoverTask

protected void recoverTask(Throwable e)

Specified by:

recoverTask in class DNSStateTask

advanceTask

protected void advanceTask()

Specified by:

advanceTask in class DNSStateTask