SSF.Net
Class droptailQueueMonitor_1

java.lang.Object
  |
  +--SSF.Net.droptailQueueMonitor_1

All Implemented Interfaces:

PacketQueueMonitor

public class droptailQueueMonitor_1

extends java.lang.Object

implements PacketQueueMonitor

A prototype queue monitor built atop the SSF.Util.Streams infrastructure, provided as a demonstration. Monitors the IP packet arrivals and drops in a droptailQueue on the NIC on which this droptailQueueMonitor is configured. Computes the average queue length as the time integral of queue length in consecutive time intervals of length probe_interval and writes to the named StreamInterface.

Uses record_type(s): SSF.Net.QueueRecord_1, SSF.Net.QueueProbeIntRecord.

See Also:

droptailQueue, droptailRecordPlayer_1, SSF.Util.Streams

Constructor Summary

droptailQueueMonitor_1()

Method Summary

float	avgQueueLength() integral of queue_length(t) in the measurement interval divided by the length of the measurement interval.
void	config(NIC ownerNIC, com.renesys.raceway.DML.Configuration cfg) configure the Monitor.
void	init() called by SSF.Net.NIC.init()
void	receive(ProtocolMessage msg) Log a packet record as a packet arrives to the queue.

Methods inherited from class java.lang.Object

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

Constructor Detail

droptailQueueMonitor_1

public droptailQueueMonitor_1()

Method Detail

config

public void config(NIC ownerNIC,
                   com.renesys.raceway.DML.Configuration cfg)
            throws com.renesys.raceway.DML.configException

configure the Monitor. The supported DML attributes are:

   monitor [
     use SSF.Net.droptailQueueMonitor
     probe_interval  %F   # queue length averaging time interval, seconds (double)
     debug           %S   # print verbose diagnostics, true/false
   ]
 

Specified by:

config in interface PacketQueueMonitor

com.renesys.raceway.DML.configException

init

public void init()

called by SSF.Net.NIC.init()

Specified by:

init in interface PacketQueueMonitor

receive

public void receive(ProtocolMessage msg)

Log a packet record as a packet arrives to the queue.

Specified by:

receive in interface PacketQueueMonitor

avgQueueLength

public float avgQueueLength()

integral of queue_length(t) in the measurement interval divided by the length of the measurement interval.