CAB302编程讲解、辅导Java语言编程、Java程序调试讲解Database|讲解Database

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CAB302 Major Project: Electronic Asset Trading Platform
Major Project:
Electronic Asset Trading Platform
CAB302 Semester 1, 2021
Date due: 06/06/21 (Sunday, Week 13)
Weighting: 60% (50% group, 10% individual)
Specification version: 1.0
Overview
The unnamed client corporation has contracted your team of developers to create a client-server
system for electronic trading of virtual assets within their organisation. Included in this document
are a description of the project from the corporation (Appendix A), as well as a collection of user
stories from project stakeholders (Appendix B).
Your team’s task is to gather requirements from the project description and user stories. Your team
must produce a detailed design of the system you intend to construct to meet these requirements.
You must then create an implementation of the system in the Java programming language, along
with a comprehensive unit testing suite. Finally, you will need to demonstrate this system to the
client, showing how you have met their requirements. Due to the international nature of our client
and the present situation with COVID-19, this demonstration will need to be recorded in the form of
a video. The client also wants individual videos from members of your team, detailing their
individual contributions.
These are not sequential steps, and it is expected you will revisit earlier steps as you develop the
project and learn more about what you are creating.
In addition to your code and the reports described previously, the client also insists on having access
to the full revision history of your project. This means that, from the start, your project’s working
directory needs to be hosted in a Git repository and you need to be regularly creating commits with
useful commit messages. This will also help your team to collaborate with each other. (Note that, if
you have a copy of your repository hosted by a provider like GitHub or BitBucket, make sure that
your project is private to ensure that your code is safe from other competing teams who might try
to pass off your hard work as their own.)
The client will naturally want to be updated at various points during the project’s development and
you will be required to submit videos for that purpose as well.
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Project Stages
Requirements (5%)
For this part of the project you must create a requirements document, which simply consists of a list
of the client’s requirements, for use when creating your detailed design. This may be a separate
document or part of your main report (along with the detailed design.)
You will find the client’s requirements in Appendix A (Project description) and Appendix B (User
stories) of this specification. If you require clarification as to the client’s requirements, send email to
cab302@qut.edu.au – before you do so, however, check the “Responses to Client Inquiries” folder
on Blackboard (under Assessment -> Major Project) to see if your question has already been
answered.
We have no specific requirements for how this document needs to be formatted- simply that it
contains a list of requirements and their priorities (e.g. must have, should have, nice to have) and
that those requirements are sensibly grouped (e.g. by priority.) You can also include e.g. very basic
user interface mockups if those help to describe the design for the project. The main thing is that
this document needs to contain all the information needed by a project team to implement the
project the client wants without needing to go back to the information in Appendices A and B. In
other words, you need to synthesise all relevant facts contained within those appendices into your
requirements document.
You can search the web for “product requirements document” to get ideas for possible structures
for this document, but you are not required to follow any of them.
Expected length: 2-4 pages.
Detailed Design (10%)
Your team needs to create a detailed design document that takes the project requirements from
your requirements document and describes, in detail, the components needed to create the
software you have been tasked with developing.
As with the requirements document, there is no specific format required. However, it is expected
that your document will contain at least the following:
• Designs of the (public) Java classes that will comprise your programs:
o Descriptions of all public methods and fields.
o Descriptions of the arguments each method takes and what the method returns.
o Any assumptions (preconditions and postconditions).
o Any checked exceptions that may be thrown by the method, and the circumstances
under which the exceptions will be thrown.
You may find it useful to use the JavaDoc tool to generate these descriptions from /**-
style comments in your source code. This will make it easier to keep the design
document up to date with the source code. You are permitted to submit your JavaDoc
separately and to reference it from your detailed design document.
It may be a good idea at this stage to create your project in your Java IDE and start
creating these classes and methods. Do not create the actual implementations yet (just
make all the methods return e.g. 0 or ‘null’), but just creating the classes and methods
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will allow you to start creating JavaDoc-style /** comments, which you can use as part
of your design process.
• How these classes interact with each other (e.g. which classes call which other classes, which
classes are passed as arguments to the method calls of other classes.)
o You may find it useful to create a class diagram to document this, but this is not
required. Search for “UML class diagram” to see popular examples of this.
Note that not every public Java class needs to be documented here- just the ones
that are responsible for the internal work that needs to be carried out, and
therefore the classes that would be tested via unit tests. Examples of classes that
you do not need to include here are:
 Test classes
 Exceptions
 GUI forms
• Designs of the forms that make up the client’s graphical user interface, and how these forms
are interconnected.
o These can be e.g., scanned/photographed sketches, but I would suggest using
drawing tools to create respectable looking user interface mockups.
o If you created the server as a GUI program, you should also include designs for the
server’s GUI forms.
• The design of the database schema
o Tables and table columns (column names and data types)
o How those tables are connected (primary keys and foreign keys)
You may find it useful to use Object-Role Modelling to present this information, but
it is not necessary.
• The design of the network protocol used by the client and server to exchange information.
o A description of the data that is sent from client to server or from server to client,
and how that data should be interpreted.
o Basically, this part should contain all the information required to create a compatible
server or client that could be used to replace the server or client that your team
creates.
Like every other step, it is not expected that you will create this in one go. You will end up refining
this document over the course of the project as things change and you learn more about the
software you are creating. Make sure it is kept up to date.
You can search the web for “software design document” to see examples of detailed design
documents for software projects, but once again, you are not required to follow any particular
structure for this document.
The principal litmus test by which you should judge this document is if a skilled team would be able
to take it and produce the software (by creating the classes described within the design and
developing their implementations) without needing to go back to the requirements document.
Expected length: 6-12 pages, or longer if your detailed class description is included in the page
count.
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Unit Testing (10%)
For this part of the project, your team will need to take your detailed design document and use the
information inside it to prepare JUnit 5 unit tests for each of the classes described within.
Initially this will be black box unit tests, created before your team has developed the
implementations for these classes. These unit tests should check that the classes follow their
specifications as described in the detailed design document.
Remember to create unit tests for:
• Normal cases
• Boundary cases (for each equivalence class)
• Exceptional cases
As a general rule, every behaviour described in the specification for that class should be tested for.
After implementation, your team must then come back to this section and create glass box unit
tests. This time the goal is to complement your black box tests with tests that attempt to achieve full
code coverage. (You can use IntelliJ IDEA to evaluate code coverage of your unit tests using ‘Run
with Coverage.’) You want to create tests that are deliberately designed to cover as much code as
possible.
As with the other stages, your unit tests are not expected to remain static. Changes to requirements
and design will result in you needing to modify your unit tests or create new ones.
Some classes, particularly those that deal with external resources (database, network) may need to
be mocked for them to be tested. Creating mock classes is part of your unit testing stage, and these
do not need to be documented in your detailed design.
Remember the mantra of Test-Driven development: red, green, refactor!
Implementation (10%)
In this stage your team needs to actually create the software requested by the client. Ideally your
development should be agile, and you should reach this stage early on, getting something very basic
working from the beginning. It is not necessary or desirable to develop the entire project at once.
Get something very simple working, then expand on it.
• Implement classes that you have unit tests for. Follow the Test-Driven Development
approach and write very basic implementations designed to pass the unit tests, then
refactor them to remove duplication and improve the quality of the code.
• Implement classes that you don’t have unit tests for. These include the non-mock versions of
the mock classes you created during the unit testing stage (classes designed to interface
with a database or network connection), exception classes, GUI forms and so forth.
Remember that you are creating two applications (a client program and a server program.) We
suggest creating just one project (remember that each class can have its own main() method), but
dividing your code up into multiple packages to reflect the application that uses each. For example,
you might have a ‘client’ package, a ‘server’ package, as well, as a ‘common’ package containing
classes that are used by both.
Your team must make use of Java and the JDK (any version, but we will test with 15), which has all
the functionality you need for completing this project. Use of external Java frameworks (e.g. the
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Spring framework, JavaFX etc.) is permitted, but you must make sure you cite these and provide
detailed instructions in your project for getting these working so that we can build your software.
Integration (5%)
Your team should only really consider this part if you are feeling confident and have already made
good progress in the other stages, but part of delivering a software project as a professional
software team is delivering an established build pipeline:
• Build scripts (in Ant, Maven or Gradle) to automate building and running unit tests.
• A continuous integration pipeline (in Jenkins or GitHub Actions) to build and test your
software automatically when commits are made to the project repository.
Make sure you demonstrate your build script(s) and continuous integration pipeline in your final
submission video!
Deliverables
As described in the overview, the client wants you to provide video demonstrations of the indevelopment
project, final software etc. No marks are given for the quality of your presentation or
fancy video editing work – it is simply important that the videos demonstrate everything that you
have been asked to do for this project. Note that these videos will be used primarily to mark your
assignment – that is, if you do not demonstrate some particular feature or aspect of your work, you
will not get any marks for it. This applies to the documents you need to submit, your code, your
software while it is running etc.
We suggest you read the CRA (available on Blackboard under Assessment -> Major Project) and
consider demonstrating each item in the same order they appear in the CRA, to ensure the marker
does not miss anything.
You can record these videos however you wish – a simple recording of the screen with voiceover is
sufficient, for example.
Zoom can be used for this (just click to start a new meeting, share your screen, start recording and
go). OBS Studio is another popular choice but requires more setup work. Use of a mobile phone
camera pointed at the screen is discouraged. Editing and artistic license is not marked; however, we
do need to be able to see what is going on in your video.
(If you do not have a dedicated microphone but do have a mobile phone that supports Zoom, you
can use this as a workaround for getting your voice into the video. Create a Zoom meeting from your
computer, join the meeting on your phone, then screen-share from your computer. You can then
talk using the phone while recording video using your computer.)
Note that everyone in your team will eventually need to submit a video, so make sure that everyone
gets some experience with the process.
Milestone #1 (Week 8) (5%)
The client is keen to see your progress on the requirements and detailed design documents by the
end of Week 8 (April 30) to check that you are on track. These are not expected to cover everything
by this point, but just to represent a good start. If you have some early prototype work on the actual
software, this would also be a good time to demonstrate this to the client. You should submit the
following:
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• Your requirements document as it currently stands.
• Your detailed design document as it currently stands.
• Your current plan for the next 2 weeks (sprint planning). Keep this realistic and achievable;
and describe what each team member will be doing in that time.
• A video showing your progress (including showing the documents and your plan for the next
2 weeks.) Maximum length: 4 minutes.
The client may not have time to read the documents, so make sure everything is covered in the
video. You can then use this submission to get some useful feedback on how you are going, to check
that you are on the right track etc.
The maximum length for this video is 4 minutes. If you submit a longer video, we will watch the first
4 minutes of it and give you marks based on that. You may want to rehearse what you are going to
say and present in the video to keep within this time limit.
Note that if you do not submit this milestone by Week 8, you can still submit it later (by the final due
date of June 6) and get the marks (5%). However, you will not be able to get feedback in time for it
to be useful. Submit by the end of Week 8 if you want feedback.
Milestone #2 (Week 10) (5%)
The client is keen to see your progress after the previous two weeks; and would like to see how your
requirements/detailed design documents have evolved in this time (if they have), and in general,
how the software is coming along. By the end of Week 10 (May 16) submit the following:
• Your requirements document as it currently stands.
• Your detailed design document as it currently stands.
• Your current plan for rest of the project duration.
• A video showing your progress since the Week 8 milestone (including showing the
documents and your plan for the rest of the project.) Maximum length: 4 minutes.
Once again, the client may not have time to read the documents, so make sure everything is
covered in the video. Use the video to specifically focus on things that have changed since the Week
8 milestone (i.e. it’s not important to cover things you covered in the previous video.)
The maximum length for this video is 4 minutes. If you submit a longer video, we will watch the first
4 minutes of it.
Again, if you do not submit this milestone by Week 10, you can still submit it later (by the final due
date of June 6) and get the marks (5%), but this will come at the cost of timely feedback.
Group submission (Week 13)
At long last, the project deadline has been reached. The client is keen to see your results. If the
project has reached its completion and does everything the client asked for, congratulations! If not,
the client still wants to see what you managed to achieve in the time.
By the end of Week 13 (11:59 PM Sunday, June 6) your team must submit the following:
• Your final requirements document.
• Your final detailed design document.
• Instructions on how to deploy your software (including how the database needs to be set
up, any external Java frameworks that you have used etc.).
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• Your project directory, including full source code, unit tests, .git directory and so on. Submit
this as a .zip file.
• A video demonstrating every aspect of the project. Maximum length: 10 minutes.
Again, everything needs to be covered by the video. The video should be sufficient to mark your
entire assignment, so make sure you cover everything you wish to receive marks for. We still
require you to submit everything else (so that we can check it if we feel it is necessary) but you will
not get any marks for anything that is not covered in the video.
The maximum length for this video is 10 minutes. It may be difficult to cover everything in that time.
We recommend:
• Rehearsing what you are going to cover in the video.
• Ensuring that the software you are going to demonstrate (your client and server programs)
are already open and running before you start so you do not need to wait for them to load
up.
• Consider using some simple video editing software (e.g. OpenShot) to cut down on pauses,
make jumping between documents faster etc. after you have finished the initial recording.
Note that the .git directory is hidden by default. You may need to configure your environment to
show hidden files/directories before you zip your project directory, in order to ensure that this is
included.
Individual submission (Week 13) (10%)
In addition to what your group has managed to put together, the client also wants to know what you
can do individually, and has asked each member of your group to submit videos. These videos have a
maximum length of 3 minutes each and should contain the following:
• The parts of the project you worked on by yourself, the parts that you worked on with
others etc.
• A quick scroll through the Git history of your project (e.g. on GitHub/BitBucket, or through
the ‘git log’ command from inside Git Bash, or through ‘Show Git Log’ in IntelliJ IDEA),
focusing on your individual commits.
Note that it is not necessary for your group to collaborate on producing these – the marks awarded
for the things demonstrated in these individual videos are awarded individually.
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Additional Information
Video formats and sizes
Make sure you submit your video files in a format that we can use. Generally speaking, if VLC can
open your video, you should be good. The videos created by Zoom and OBS Studio should not have
any problems, but if you use some other unusual software there may be an issue.
Your video files should also not be too large. Zoom tends to create nice small video files, while OBS
Studio (on default settings) creates pretty large ones. If you are using OBS Studio, it might be
desirable to re-encode your videos with a tool like Handbrake (experiment with the quality settings.)
Try to aim for 50mb or less.
Another approach you can take is to upload your video to a video sharing site like YouTube (prefer
‘unlisted’ to ‘public’ when uploading your video), or a reliable file-sharing service like DropBox or
Google Drive, and then submit the link.
Group vs Individual marks
The standard mark breakdown for this assignment is 50% group marks, 10% individual marks. Group
marks are awarded to the entire group (everyone will receive the same mark) while individual marks
are awarded individually. The group marks come from the Milestone #1, Milestone #2 and Group
Submission items above (worth 5%, 5% and 40% respectively), while the individual marks come from
your individual submission video (worth 10%.) This is how the assignments will normally be assigned
marks.
However, under certain circumstances, different members of the group may receive a different
group mark to each other. The main reason this might happen is if certain members of the group did
not contribute to certain stages of the project (e.g. did not contribute to the detailed design, did not
write unit tests, did not write code.) In that case those group members will receive a group mark of 0
for those sections (we cannot give you marks for things you did not do.)
Now, we understand that occasionally group dynamics can turn ugly and things can happen, such as
one group member taking over control of a certain part of the project and not allowing others to
contribute. We hope this does not happen to your group, but in those circumstances, the solution is
to do work on these sections (reports, unit tests, implementation code etc.) and then submit your
work separately along with your individual contribution video and an explanation of why you are
doing so, just to show that you are capable of doing the work and therefore are entitled to receive
the group’s mark.
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Academic integrity
The process we will be using to ensure the integrity of this assignment is a simple one. At the end of
the semester, with everything submitted, we will take everything that has been submitted (all your
documents, source code etc.) and throw it into various tools for detecting duplicates, just as
Stanford MOSS. If we find teams have submitted substantially duplicate work (either to another
team or to material found online) they will be automatically referred to the Faculty Academic
Misconduct Committee.
Here are some tips on how to protect yourself:
• If you find some nice code online that does what you want (and there are no legal problems
associated with you using it), e.g. on StackOverflow, feel free to copy and paste that into
your project. But make sure you put in a comment above the code saying where you got it
from. If the code is from StackOverflow, link the StackOverflow post. Cite everything you use
from somewhere else.
• If you want to work with people who are not in your team, that is okay! You can discuss
ideas, discuss requirements, talk about different ways of doing things. However, your
documents, source code, software etc. must be kept within your team and you must not
submit work that was not created outside your team. In addition, do not record your
demonstration videos using another group’s software.
• If you have your code in an online repository provider like GitHub or BitBucket (this is highly
recommended), make sure that you have it set to private so that others outside your team
cannot see it. Otherwise, unscrupulous individuals can submit your code and you may be
penalised by the Misconduct Committee even if you can prove it was your code originally.
• Don’t make your repository public immediately after the due date. Last year I had a situation
where one student made his repository public after the due date and another student, who
was given an extension, downloaded it and submitted it themselves. Wait a few months
first. If an employer wants to see your work, you can just give them access to it individually.
• Do not upload your assignment or the assignment specification to any public external sites,
including but not limited to StackOverflow, Chegg, social media etc.
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Appendix A: Client Project Description
To Whom It May Concern,
RE: Electronic Asset Trading Platform
We have a great many different types of resources that need to be efficiently distributed and shared
across the organisation (computational resources, hardware resources, software licenses etc.). After
trying a few approaches that we have determined are not satisfactory, we have settled on the
following approach, and we want your team to build us a software platform to help us implement it:
We require your team to implement a virtual trading platform for these resources. The idea is that
organisational units will be given a budget of a certain number of electronic credits. They can then
use those credits to buy access to resources from other organisational units. So, for example, our
compute cluster division might sell individual CPU hours for credits, and then take the credits they
get and use that to buy other things they need. We do not know, in advance, exactly what assets will
be traded on this platform – you should create a flexible enough system that we can add new asset
types to.
We require the software platform to facilitate trades via a marketplace model. Instead of having two
organisational units agree to trade synchronously, organisational units who want to buy something
will put in a BUY order, for a certain quantity of a particular commodity at a particular price (e.g. BUY
100 CPU hours at 10 credits each). Organisational units wishing to sell something will put in a SELL
order, again, for a certain quantity at a certain price (e.g. SELL 500 CPU hours at 10 credits each.)
Your software will periodically check and reconcile all outstanding trades. In this particular example,
100 CPU hours will be sold to the first organisational unit for 10 credits each. This will eliminate the
first organisational unit’s BUY order entirely, while the second organisational unit’s SELL order will
be reduced to ‘SELL 400 CPU hours at 10 credits each’. Trades will not happen if the terms are
unacceptable to either party (e.g. more expensive than the buyer is willing to pay, or less expensive
than the seller is willing to accept.) If there is some slack in two compatible trades (e.g. ‘BUY 10
widgets for 20 credits’ and ‘SELL 10 widgets for 15 credits’) the transaction should be carried out
using the lower price (which will always be the selling price.)
We require this to be implemented with a client-server model, where we run 1 server (which keeps
track of every organisational unit’s assets, credit balance and all trades.) and clients connect to this
server to list trades. There should be no (artificial) limit to the number of commodities in the
database, no limit to the number of trades that can be listed and no limit to the number of users
using the system. We need everyone to have their own usernames and passwords which the user
will enter into the client when logging in, to ensure only authorised users from each organisational
unit are able to trade.
We have included some user stories from people in the organisation who will be using this software,
so you can get a feel for what we want to see. Best of luck!
Regards,
The Manager
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Appendix B: User Stories
As a user, I think it’s important to have a nice, friendly GUI interface, not a dusty old command
line interface.
As a user, when I am thinking about listing a buy or sell offer for an asset, I want to be able to see
what current BUY and SELL offers are currently listed, so that I do not greatly overbid/underbid.
As the leader of an organisational unit, I need all of the members of my team to have access to
this system, through their own individual usernames and passwords. I need them all to be trading
using the credit balance and assets of the organisational unit they are part of.
As a user, sometimes after adding an offer I might decide that I want to remove that offer,
perhaps to relist it again at a different price. I should be able to see all the currently standing
offers from my organisational unit in the database and be able to selectively remove them.
As the leader of an organisational unit, I do not want to accidentally put in a BUY offer for more
credits than my organisational unit has, or a SELL offer for more of a particular asset than my
organisational unit has. We do not want our organisational units to risk going into debt. The
system should check for this and stop us from listing more than we have. For example, if I have 50
widgets and I have a SELL offer for 30 of them, I can only create a SELL offer for 20. I will have to
cancel the first offer if I want to create another for more.
As a member of the IT Administration team, I require that only we (the IT Administration team)
have the ability to create new organisational units. We should also be able to edit the number of
credits they have, edit the number of each asset they have and so forth. We should also be able to
add new asset types to the database, as well as add new users and assign them passwords and
assign them to organisational units. We need to have special types of user accounts that can do
this from the GUI client. Members of the IT Administration team should also be able to add new
users with the same level of access, so we can give it to anyone new that joins the IT
Administration.
As a user, it would be nice if I could change my own password without having to ask the IT
Administration team to do it for me.
As a user, when I go to buy or sell an asset, I want to be able to see the price history of that asset
– what it has sold for in the past. Actually, it would be nice if you could show this on some kind of
graph (with the date on the X axis and the price on the Y axis), like Google shows when you type in
a stock name, so that I can see the history of trades of that asset and get a feel for whether the
price of something is going up, going down or holding steady. This may be some work, though, so
it’s not that important.
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Appendix B: User Stories (cont’d)
As a user, when I have the software open and a trade involving my organisational unit is
reconciled, I would like it to show a little message somewhere. Nothing too obnoxious, but it’s
nice to know when a trade is fulfilled.
As a systems administrator, I would like the client to read from some kind of configuration file to
get the server IP address and port to connect to. The server should do the same thing to get its
port number. Reason is, I may have to move the server to run on a different machine at some
point, and I think this is the easiest way to get the new configuration information out to everyone.
As a systems administrator, I require the following things to be stored in a MariaDB or PostgreSQL
or SQLite3 database on the server, so they are all kept in one place and they can be backed up
easily:
• User information (username, password, account type

CAB302编程讲解、辅导Java语言编程、Java程序调试 讲解Database|讲解Database

CAB302编程讲解、辅导Java语言编程、Java程序调试讲解Database|讲解Database