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Perl assignment

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 Professional

Active Perl 5.6.1

Habilidades: .NET, Programação C, Programação C#, Engenharia, Microsoft, MySQL, Perl, PHP, Arquitetura de software, Teste de Software, Visual Basic, Área de trabalho do Windows

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