Class JobArrival

java.lang.Object
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  +--Device
        |
        +--JobArrival

class JobArrival

extends Device

JobArrival is a phony kind of device that "interrupts" when a new job arrives in the system. It works by reading a trace file that indicates the starting times and resource requirements of jobs that were actually run on a real system.

Field Summary

private java.lang.String	fileName The name of the trace file
private java.io.BufferedReader	traceFile The trace file itself

Fields inherited from class Device

currentJob, name, nextInterruptTime, running, startedAt, totalTime, trace

Constructor Summary

JobArrival(java.lang.String fname)
Initialize the device by opening the trace file.

Method Summary

void	start(Job j, int dummy) Read the next (or first) job description from the input file, skipping molformed lines, and make it the current job, with a simulated interrupt occurring at the arrival time of the job.

Methods inherited from class Device

current, isBusy, nextInterrupt, printStats, stop, toString

Methods inherited from class java.lang.Object

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

Field Detail

fileName

private java.lang.String fileName

The name of the trace file

traceFile

private java.io.BufferedReader traceFile

The trace file itself

Constructor Detail

JobArrival

public JobArrival(java.lang.String fname)

Initialize the device by opening the trace file. The first line is read whenever the device is started.

Parameters:

fname - the name of the trace file.

Method Detail

start

public void start(Job j,
                  int dummy)

Read the next (or first) job description from the input file, skipping molformed lines, and make it the current job, with a simulated interrupt occurring at the arrival time of the job. If no more valid lines appear in the file, schedule an interrupt at time inifinity.

Overrides:

start in class Device

Parameters:

j - dummy argument to conform to the Device interface

dummy - dummy argument to conform to the Device interface

See Also:

Device