server
Class DeviceThread

java.lang.Object
  java.lang.Thread
      server.DeviceThread

All Implemented Interfaces:

java.util.Observer, java.lang.Runnable

public class DeviceThread

extends java.lang.Thread

implements java.util.Observer

Controls the polling of all attributes associated with a single Device. Responsible for uncovering all the monitored Interfaces and each Interface's monitored Attributes. This thread polls each attribute at the Attribute's polling frequency (in seconds).

To handle the polling frequencies, DeviceThread creates a dedicated Timer thread, which supplies one second interrupts.

Version:

0.1

Author:

ryan/gswalters

See Also:

Timer

Nested Class Summary

class

DeviceThread.PollInfo Inner class to hold a time and boolean indicating polling required.

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

DeviceThread(Device myDevice, GLTMonitor controller, Conf config)
Construct a DeviceThread object for a specific Device.

Method Summary

void	run() The DeviceThread builds a list of monitored Interfaces w/ monitored attributes.
void	update(java.util.Observable o, java.lang.Object arg) Process the notifications from all possible observable objects.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

DeviceThread

public DeviceThread(Device myDevice,
                    GLTMonitor controller,
                    Conf config)

Construct a DeviceThread object for a specific Device. Set the Device this thread monitors, and the GLTMon application as controller for change notification.

Also create the Timer thread, but don't start it yet.

Parameters:

myDevice - Device object for which to poll attributes

controller - GLTMon object that will notify us of changes

Method Detail

run

public void run()

The DeviceThread builds a list of monitored Interfaces w/ monitored attributes. Each attribute will be polled based on the Attribute's polling information (frequency and max rate). Each poll is saved to the PollResult table.

• Create initial Interface Hashtable (coupled with ifIndex)
• Create initial Attribute Vector
• Create initial PollFreq Array (each value equals 1)

Specified by:

run in interface java.lang.Runnable

update

public void update(java.util.Observable o,
                   java.lang.Object arg)

Process the notifications from all possible observable objects. DeviceThread observes a Timer thread for second interrupts, and the controller thread (GLTMon) for changes to its operations.

Specified by:

update in interface java.util.Observer

See Also:

Observer.update(java.util.Observable, java.lang.Object)