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Passed SCJD(URLY bird)

 
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So here is the score. I banged my way through SCJD in a hurry, submited it about a month ago, and was finally able to see the results after a hectic week of moving. I am surprised at the score(in a good way), I guess the I lost marks for the general considerations because I did the test a week after submitting the assignments. Oh well I am happy either way.


This report shows the total number of points awarded for each section. The maximum number of points is 400, to pass you need a score of 320. Section Summary: Section Maximum Actual Points Points
General Con: 100 78
Documentation: 70 70
OOD: 30 30
GUI: 40 40
Locking: 80 80
Data Store: 40 40
Network Server: 40 40
Total: 400 378

My approach was a simple clean design with clear detailed documentation. This allowed me to complete the assignment in about three weeks and get a descent score

My program is the equavelnt of a diet cola. The bare minimum with the only optional requirements of unbooking and an html help file display thingy. I used RMI. For persistance I used simple files, and only opted to persist the location of the database file(for the server) and the location of the database server(for the client).

GUI:
My gui was very simple. Nothing special. Since the search called for an exact match I had a drop boxes for location and name with all possible options.

Locks:
I used individual record locks, with cacheing. In my case this simplified everything quite a bit. I read in the whole database into record data structures that held both the record state(delete/lock) as well as the values and then stuck them into a vector(yeah I know its old I just used the first list type container I found ).

Design:
The server side had three parts. Data, Business logic and the server. Each client talks to the server through a buisness logic interface instance(each client has one). When the server gets a connection it returns a buisness logic instance to the client. All the business logic instance then talk to a singleton Data class. The reason I have multiple business logic class instances is so that I can deal with orphan locks(yes buiness logic implements remote).

THe client side uses a simplified form of the MVC pattern.

Other stuff:
I had an extra class that defined the whole database(kind of like an abstract factory but not quite). I used this apprach instead of a property file because it was much simpler but at the same time allowed the same type of extensibility.

I documented every single little detailed assumption I made. I think this helped me getaway with some things.

I did implement the 48hour rule. I assumed that all the clients were located in the same timezone and I documented this as well.


Thanks:
Thanks to everybody, I had fun doing this assignment and particpating in discussions. I did buy the popular SCJD book, but by the time I got it I found this forum to be far more usefull so it became paper weight. Special thanks to Mr Monkhouse whos detailed answers to past threads help me get a good idea of the design and the design problems.

anyways good luck to all you guys taking SCJD.... I will check this place out as time permits
for now I am a very happy camper...
[ January 06, 2005: Message edited by: Inuka Vincit ]
 
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Congratulations

Don't forget to update your signature
 
Inuka Vincit
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thanks Dieskun for showing me where the details were at.... lol I couldnt figure out my score for a while there .
 
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Oh my God! You did it finally! You not only passed but you passed too well. You aced the SCJD! I am so happy! Now i have someone i can bug for the year for my own assignment! Anyways i am so happy for you. So what'z next, or are u icing out for a while! Well i guess you are a role model for me now! 2 certification since Aug. 2004(C#,SCJP ) and now SCJD.
Once again congratulations. Will see yah around when i mail you privately! I am so excited for you. Cheers mate.
Saheed.
SCJP 1.4
SCJP beta 1.5(preparing..)
SCJD(Preparing..)
 
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Congratulations !
 
author and jackaroo
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Congratulations

I have moved this thread to the Sun Certifications Results forum.

Regards, Andrew
 
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Hello Inuka:
Can I ask you a question since I'm doing the same project .
I want to know how do you implement "read()" method which descriped in "DBMain" interface:
//******************************************************************//
// Reads a record from the file. Returns an array where each
// element is a record value.
public String [] read(int recNo) throws RecordNotFoundException;
//******************************************************************//
I knew you read all data into memory, but the requirement of this mehtod say: "read record from file" . so when you implemented the "read(int recNO)"method , how did you write this method,still let this method read data from file , or change it for reading data from memory.
thank you very much.
 
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Congrats!
 
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Congratulations !!
 
Don't get me started about those stupid light bulbs.
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