Finite State Process (FSP) Language Processes to Model the Printer - IT/Computer Science Assignment Help

ASSIGNMENT TASK:

TASK:

Question 1

The following is a specification of a system consisting of two processes sharing a printer.

• A shared printer called PRINTER, that can be used to print a document. It also allows users to cancel the printing of a document.
• A user process called User, that repeatedly prints a document. Note that a document is denoted by a DOC_ID, which is a number.
• An administrator process called Admin, that only services the printer, and does not print.

• All the user and administrator processes that share the printer must obvi- ously have mutually exclusive access to it.

• The system consists of the two user processes, that print different docu- ments, one administrator process and one shared printer.

(a) Define three Finite State Process (FSP) language processes to model the PRINTER, User and Admin. Using your three types of processes define a composite process that models the complete system. [20 marks]

(b) Briefly explain how you have ensured that the two user processes User and the Admin process have mutually exclusive access to the shared printer PRINTER.

Question 2

Yo are required to create a multi-threaded concurrent Java program to model the temperature control system for a house’s central heating system. The system consists of the following components:

• 1 Temperature Controller unit: this controls the heating system on the 3 floors of a house: ground floor, first floor and attic; by allowing differ- ent temperatures to be set on each floor. The controller implements the

following interface:

public interface Temperatures

{
public void setGFtemp( int newgftemp ) ;
public void setFFtemp( int newfftemp ) ;
public void setATtemp( int newattemp ) ;
public void displayTemperatures( ) ;
}

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