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Perl Assessment

Basic System:

A UNIX computer system handles printing in the following manner:

-3 USER processes submit print jobs of various sizes at random intervals to a VALIDATION QUEUE.

-jobs are taken from the validation queue by a single VALIDATOR process which will check for a user entry on a USER STATUS file.

-the validator will take ONE of the following actions, according to the presence or absence of a user entry and the user status:

a. for valid jobs, the validator submits the print job to the PRINT LIST.

b. for invalid jobs, the validator sends a message to the LOGFILE explaining why the print job has been rejected.

-print jobs are taken from the print queue by 2 PRINTER processes.

-after printing, printers send a message to the LOGFILE reporting that the print job has been executed.

-a single REPORT process reads the log file and copies new entries to the screen.

## Deliverables

1. Create a simulation of the scenario in PERL:

-you must simulate all the aspects of the scenario.

-the simulation must contain a suitable number of instances of each of the scenario processes to represent the full complexity of the system simulated.

-you must use "flock" to simulate critical regions etc.

-you must submit a working system.

-for development and assessment purposes, verbose reporting of process activity is advisable.

2.

-diagrams which show process interaction.

-descriptions of the interaction of the processes, queues and list.

-explanations of the operating system utilities used (included PERL commands e.g by using commented code snippets).

-code listing with appropriate comments.

-commented test runs and test data.

## Platform

Windows XP

Habilidades: Engenharia, MySQL, Perl, PHP, Arquitetura de software, Teste de Software

Ver mais: user diagrams, unix jobs, test scenario, process data entry computer, development diagrams, computer jobs list, computer complexity, complexity log, utilities jobs, reporting jobs, interaction jobs, why rejected, message queue, create simulated file system, file system simulation, queues, entry processes, code job simulation, send file printer, report activity log, reporting purposes, perl print printer, operating system simulation, perl windows, check data entry report

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