CS4273: Distributed System Technologies and Programming

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13 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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CS4273: Distributed System Technologies and Programming


Lecture 13: Review

2

Final Exam

1.
When and where?

2.
Exam Type?


Close book exam. No teaching materials are allowed.

3.
What are the questions?


2 hours work (the length of your answer should match the marks of the
question).


5 questions (mostly programming questions). Answer all the questions.


Write your answers on the exam paper (use back side if extra space is
needed).


4.
How to prepare?


Understanding

teaching materials, assignments, and tutorial questions.

3

WWW and Java programming


HTTP protocol



Operations of the HTTP protocol


GUI



Event handling model



Programming of simple event handling


Java applets



Applet life cycle,



Applet methods and applet programming format,



Parameter passing,



Inter
-
applet communication.

4

Java Multi
-
thread Programming


Thread definition & creation



Thread methods



Multi
-
threaded applets & servers


Thread mutual exclusion



Using keyword “synchronized”


Thread coordination



Using wait() / notify() or notifyAll for thread coordination and thread
-
execution control



Thread programming with coordination and mutual exclusion

5

Socket Communication


Client
-
server communication using sockets



Stream socket (connection oriented) and UDP socket (connectionless)



Applet and server communication using sockets


6

Web Searching


Structure of web searching


Spider operations (HTTP protocol)


Web digraph


Back links and backlink applications


Page ranking


Building inverted file for searching

7

CGI Programming


CGI life cycle



Applet and CGI servers (applet invokes CGI server)



Data exchange between applets & CGI servers (input /output
of applets & CGI)



Design and execution of CGI servers

8

JDBC


JDBC fundamentals


2
-
tier structure: Communication and data flow between


applet and DBMS


3
-
tier structure: Communication and data
-
flow between


applet and CGI,


CGI and DBMS


Servlet with JDBC for database access

9

Java Servlet


Fundamental concepts of Java Servlet


Invocation of a servlet (servlet life cycle)


Communication between servlet and applet / browser (HTML forms)


HTTP Servlet Programming


Get / Post methods


Input / Output of servlets


Servlet cookies


Servlet sessions


Servlets as a middle tier of systems (DBMS, mail
-
server, etc.)

10

Security Programming


Fundamentals of security


Authentication, secure data transmission, and access control


SSL and https


Certificates, their applications and verification


Declarative security


Security configurations for authentication, servlets


BASIC method and FORM
-
based authentication


Switch to https


Combined declarative and program security


Authentication by declarative method and access control by programming
method


Pure program security


Authentication, access control and switch to https


Session tracking for authenticated users

11

JSP


Fundamental concepts of JSP



Why JSP



How is a jsp program executed



How to start a jsp program



Be able to understand and write simple JSP programs



Inclusion of “Java” code



Parameter passing



Use of library or Java beans

12

Remote Method Invocation (RMI)


What is RMI (why to use RMI)?


Programming by using RMI:


Interface definition


Client side programming


Server side programming


Client


Server binding


Steps of constructing, compiling, and executing clients &
servers


Applet and Server interaction by using RMI

13

An Example of Past Exam Question

3. [25 marks] Write a Java servlet that collects the order from clients and requests the mail server by

using SMTP protocol to send the order to
supplier@
mailorder.com as an email. Suppose the mail

server is on machine “mail.cityu.edu.hk” and its port number is 25.


The following HTML form (the display image is given below) is used to take the mail orders from clients:

<HTML><HEAD><TITLE>Mail Order Form </TITLE></HEAD>

<BODY><H1> Mail Order (please complete the order form)

<FORM ACTION="http://sus16.cs.cityu.edu.hk/js/servlet/MailOrder" METHOD="POST">


Name <input name="customer" size=47> <p>


Postal
-
Address <input name="address" size=40> <p>


Product
-
Name <input name="product" size=40> <p>


Quantity <input name="quantity" size=40> <p>


<INPUT TYPE="submit" VALUE="Submit Your Order">

</FORM></BODY></HTML>


The servlet needs to reply the client after he/she submits the order, by displaying:


Your order is under processing

The email sent to the supplier should be in the form of:


The following order has been received:
Customer
-
name
Product
-
name: Quantity