Hi all,

ASSIGNMENT 1

Your first assignment in 2019/20 is to write a section of code that demonstrates the following aspects of OOP in C++:

1. Correct use of all access specifiers (public, private, protected) in an appropriate way.
2. Over-loading using either methods or constructors.
3. Abstract classes with a method that is required in all derived classes.
4. Operations on pointers to an object.
5. Over-riding of a method of an abstract class.
6. An example of multiple inheritance (it does not have to make perfect sense).
7. Separate compilation with all classes in your assignment (i.e., all classes should have .cpp and .h files).
8. An example of an object passing itself to a function (not part of a class), which modifies that object.
9. A class with a modified copy constructor and demonstrate the effect of this on pass-by-value and pass-by-reference calls.
10. A working destructor with some basic functionality on one of your classes. Demonstrate it working in your main() function.
11. Correct use of three over-loaded operators (e.g., +, = and ==) for one of your classes.
12. Use of all four C++ explicit style casts. 
13. Use of dynamic binding with virtual & non-virtual methods. Demonstrate the impact.
14. Correct use of new and delete for the allocation of an object/objects, with operations on the object using pointers. (Can be combined with other points)
15. Static states of a class and an example usage. Demonstrate the impact.
16. Demonstrates the difference between a C++ class and a C++ struct.
17. Passing an object to a method by constant reference. Demonstrate the impact.
18. Write a straightforward example class template.
19. Use of the vector container to contain a number of objects of one of your classes.
20. Use of an algorithm on your container.

There are 20 points to address and there is 10% available for the assignment, so 0.5% per point is the outline marking scheme. If you address 14 out of 20 points clearly and correctly then you should receive 7/10 (or 70% on Loop).

Please note, I would recommend that you hard code the input of data, i.e., don't set up a menu system and do not read values in from the user using cin. It is not necessary for this assignment and would lengthen the amount of work involved considerably.

As for the topic; that is up to you, but please keep it simple. If one of the points does not fit into your application, just add it anyway for demonstration, i.e., the application does not have to make perfect practical sense. The rules are that:

• You CANNOT use bank accounts, personnel/university structures, vehicles/cars, geometric shapes or animals/plant/fish/insect classifications as the application examples. This is because they are the standard examples used in my notes and in books on C++.
• You must use a single topic for all of the points. You CANNOT write an individual code project for each point.

REPORT STRUCTURE (IMPORTANT!)

There should be a brief introduction at the start of your report that explains your application idea and LISTS CLEARLY one numbered paragraph for each of the points listed above (in the same order as numbered) and explains where in your code they have been implemented. In your code comment the sections where you show the points above, detailing the point that you have addressed. This is for the sole purpose of making it easier for the tutor to correct -- but without this your assignment will not be marked.

Submit your assignment electronically as a SINGLE Google Docs generated document (not live link share!), Word Document, raw text document or PDF. This document should *only* have the following text sections: 

• Title and Student name, e-mail address, id and programme details etc.
• Introduction - to briefly introduce your application and program structure.
• Implementation - one numbered paragraph for each of the points ordered as above, which points to the location in the code where the point has been implemented – e.g. Point 6 – the class Account is an abstract class because it is missing the display() method implementation and this has been provided in the child CurrentAccount class.
• Source Code - Properly Formatted and Spaced Code. The code should be pasted into the text document. Each file can be pasted in one after the other with its name listed at the top. The code should have comments referring back to the 20 numbered paragraphs.

ASSIGNMENT SUBMISSION 

Due for Monday the 4th of November 2019 by midnight.

You should submit the assignments via Moodle at the address: https://loop.dcu.ie/mod/assign/view.php?id=1153223

Once again, use the main discussion forum here: https://loop.dcu.ie/mod/forum/view.php?id=1153218 if you have any questions on the assignment. Do not paste your code! Paste in a similar example if you need to clarify a point. If you know the answer to someone else's question please feel free to respond.

One final important issue - Please note that by the electronic submission of your first assignment I am assuming that you are familiar with the academic rules for assignments. The assignment should be 100% your own work. If any unreferenced work is used from any other source (including colleagues, the Internet or past students) it will be a serious matter and referable to the disciplinary board. Please note that all assignment work can be the subject of an interview process. See:

       http://www.dcu.ie/info/regulations/plagiarism.shtml

All assignments for this module will be uploaded to plagiarism detection software where the content will be analysed and compared to other assignment from this year and previous years. I take this matter very seriously as a few years ago several students were referred to the disciplinary committee resulting from plagiarism in this module – In one case a student was expelled from the University due to the severity of the plagiarism and the fact that at fourth/fifth year level, he should have known better.

If after you receive your mark you are concerned that there is an error with the correction, please contact the module tutor that corrected your assignment. If the tutor checks it and if you are still unhappy please contact me directly and I will discuss the issue with you and the tutor directly.

If I have failed to address any aspect of this assignment then please post to the forum.

Enjoy, 

Derek.

Introduction

In this assignment you are going to develop a Java client/server application that sends and receives temperature data to/from a PC and an embedded Linux device such as the BeagleBone Black (BBB) or Raspberry Pi (RPi). 

This assignment requires a fair amount of configuration before you begin the assignment. Please send questions on problems that you are having to the mailing list at: 

https://loop.dcu.ie/mod/forum/view.php?id=47984

The assignment is worth 15% of your overall mark in the module and therefore represents a significant body of work. The assignment begins with steps to set up your BBB/RPi to access the Internet, to flash the user LEDs using C, to install Java and finally to flash the user LEDs using Java. 

Good luck! Derek.

Background Setup and Configuration (BBB and RPi)

Follow the steps in this guide to place the BeagleBone Black (BBB) or Raspberry Pi (RPi) on the Internet so that you can clone the repository of source code on the Github site. Please note that access to the Internet from your board is useful, but it is not vital -- you can transfer files from your PC to the boards if necessary.

BeagleBone Step 1. BeagleBone Network Configuration and Source Code

    https://sites.google.com/site/derekmolloyee402/home/embedded-linux

BeagleBone Step 2. Using the BeagleBone User LEDs

Follow the guide at:

https://sites.google.com/site/derekmolloyee402/home/embedded-linux/flashing-the-leds-using-c

You can access the code for this guide in the ee402 repository directory as follows:

BeagleBone Step 3. Installing Java on the BeagleBone

https://sites.google.com/site/derekmolloyee402/home/embedded-linux/flashing-the-leds-using-java

Use the same steps in this video and download the Java SE 8 version for Linux ARM 32 Hard Float ABI, which is available at the link: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html 

Transfer the downloaded gz file to the BBB using the steps in the video to install Java 7 and the steps below this describe the settings required for Java 8.

Figure 1 illustrates my FTP screen for the latest version of Java and the commands I used to transfer the file to the BBB using psftp. The installation of PuTTY that is described in the video is the reason that I have a psftp command.

The  Embedded Linux Client/Server Temperature Graphing Service

In this assignment you should build a temperature sensor client/server application, where the embedded SBC reads the CPU core temperature from a file system entry and sends the data to a desktop computer client, which displays the data in a graphical form.

The PC Temperature Graphical Server

In this application the desktop PC is the graphical temperature server. It runs on a server port on the PC and the BBB/RPi boards connect to it. 

When a client application executes on the BBB/RPi it will connect to the server that is running on the PC and transfer temperature data (or CPU utilization data) to the server. The Server will then display the data in a Graphical User Interface (GUI).

The PC Temperature Server should have the following features:

• It should have a GUI that is built using Swing.
• The Temperature Server GUI should be able to connect to multiple clients simultaneously. (Please note that you can run multiple clients on a single RPi/BBB for testing purposes).
• The server application controls the sampling rate, and the GUI should allow the user to change this rate. (You can use a single rate for all connected clients.)
• The GUI should provide a graph display of historical readings (the last 20 readings) in scrolling graphical form. Do not use 3rd party graphing APIs or source code.
• The graphical display should display an individual graph of the raw data coming from each of the clients on the same plot. You should be able to turn on/off each individual plot.
• The graphical display should include a moving average temperature and should plot a line against the minimum and maximum temperature (i.e., a single moving average and min and max of all sensor values)
• Add two other features of your choice that you deem necessary. List them explicitly in your report.

Code Provided!

I have provided you with template code and it MUST BE USED AS THE BASIS OF YOUR SOLUTION. Do *not* use RMI or any other Java Messaging Protocols, only use the template code provided for network communication. This code is available on the web page:

http://ee402.eeng.dcu.ie/introduction/chapter-8---threads-and-networking/8-4-a-multi-threaded-client-server-application

Marking

You will receive marks for implementing the features above. You will gain marks for making the server threaded, using Swing, for sending suitable messaging objects and for a working solution. You will gain marks for novel/extra features as outlined in the specification.

The assignment is worth 15% of your final result. The marks will be broken down into Design, Implementation/Coding and Documentation:

• Design - the overall design and features of your system.
• Implementation/Coding - is the implementation of your design and the quality of your code for both the interface/client and server. Most of the marks are allocated for this component.
• Documentation - refers to the final report and the commented code. The final report should describe your design, features, interesting code segments, your messaging format etc. It should include screen grabs of your client/server in action (use ALT-PrtScr to grab a window view).

Submission Instructions

• Submit an electronic report on your project, which should be in Word for Windows (.doc) or PDF (.pdf) format.
• Your code should also be submitted with your assignment and it should be functional (comment out features that are crashing your application). Please provide instructions for the tutors on how to run your assignment. 
• The report and code should be placed in one 7zip or rar format file and uploaded to the EE402 Assignment 2 Submission in Moodle.

Submit the assignment to: https://loop.dcu.ie/mod/assign/view.php?id=76090

I will discuss the assignment in more detail over the next few weeks. But please start working through the Java notes, particularly in relation to the user interfaces sections.

Yes, it likely sounds difficult but you will get through it. I will be giving out additional hints and tips on how to complete this assignment during the coming lectures.

Good luck!

Derek.