How to write daemons (more explicit)

I have to make a java program to backup and restore encrypted files over a network.
The daemon should :
1 . The daemon has to be able to send messages to all other comps in the network that a user on some machine wants to backup or restore a file.
2. It also needs to be able to find all the files backed up of others as well as my own files on my PC.
3. I will maintain files placed on each PC using hash tables for efficient searching.When this is done the daemon will figure out from a heap of free disk space how many comps are to be involved.I then use a TCPserver or TCPclient class to open connections to them and send or receive encrypted files.
4. Daemon will send messages across the network if any system change(disk space +/-) occurs.The problem is the DAEMON- I have never written a daemon before;I dunno even the libraries u have to import.Could anyone help me out ?Can anyone give me some documentation and links on the same?
Yeah,one more thing how will that daemon calculate free disk space on my computer -any methods would be appeciated -This willl determine what computers to select for back up.
Please help me out
Thanks in advance.

public class Hello {
public static void main(String[] args) {
System.out.println("Hello world");
java Hello & The above program will run as a deamon. You don't need to fork to run as a daemon. If you want Java's equivalent of fork/exec, the closest thing (though not an exact match) is Runtime.exec. Read the API docs for details on how to use it.
Why are you so reluctant to ask your instructor for clarification?

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You could pick up examples from introductory books on Oracle.
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You could also look at Jason Price's book Oracle Database 11g SQL : http://www.amazon.com/Oracle-Database-11g-SQL-Press/dp/0071498508/ref=sr_1_1?ie=UTF8&qid=1372742972&sr=8-1&keywords=Jason+Price
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Can anyone share with me how you write Javadoc?

Can anyone share with me how their companies write Javadoc?
Are your developers solely responsible for it? Do your technical writers own it or review it? How do you make sure it's good?
Right now, my software developers are mostly responsible for writing all the API info and it's of poor quality and really lacking details. I don't mean spelling/grammar-type problems. My developers just don't seem to "get" what information to include, no matter how many guidelines or checklists I give them.
A very simple example is:
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Thank you

Hi,
Well, concerning the question what a good API documentation should be. Just imagine, you are a programmer and you want to use that API. You need to know how it works. There can be only three ways to find it:
(1) The API documentation
(2) Probing experiments. Even a good documentation may not describe everything. Sometimes, the only way to understand certain things you particularly need may be guessing something, writing a code basing on it and see how it works. Then, guessing something again, more precisely now, and so on. Even a very good documented API (for instance, javax.swing) may require that sort of approach to be able to use it eventually.
(3) At last, when source codes are available, one may look at them and try to understand precisely, what a particular method actually does.
I think the better the API documentation the less one may need to endeavor those two last steps. There is actually a limit about it. Without any proper explanation at all, one may never be able to use a particular API, neither after probing it nor after looking at source codes (that is not to say the sources may be simple unavailable at all).
Concerning how to write the API documentation, that's mostly the question of managing your team. I think, basically, the original source of the ultimate information about everything implemented in the projects are those very programmers (developers) and, probably, some software architects. But those guys normally are not especially eager to write any documentation (especially developers). That your example just demonstrates it. It seems, your programmers just wrote that "Gets the status" for you to make them leave in rest after that. In addition, the programmers normally have such a sort of work and activity that does not match particularly well with the writing literature and doing their main job simultaneously. You should not enforce them to do that!
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Particularly big projects may even need to have the whole team of technical writers.
Anyway, writing docs is a hard work. But it is extremely important! The good documentation may both increase your sales and eliminate lots of expense on further support of your customers.
Regards,
Leonid Rudy
http://www.docflex.com

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Best regards.

Phenom7 wrote:
Hi, I have few application I need to write documentation for. Im ok with the user and serwer technical stuff. But how to write proper documentation for source code? Any tutorial or howto?A pointer: be explicit and specific when writing Javadocs. If your method never returns null, make sure you say so. If it can't accept null as a parameter, be sure to say what the consequence will be if it happens (but it's OK to say the result is undefined!). A well-written method Javadoc will make users of any API you make a lot more happy, rather than keeping them guessing or making them inspect your source code.
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susang
What you report is what it is.
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Hi all,
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I answer to my question. I've got the answer.
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Hi Ganguly,
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you want print the main window data twice? or you want to create two main window in the same page ?
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this is my Movie class, if I also want to write a new Ticket class. and still i don't know how to write
because the Ticket class uses some of the attributes of the Movie class such as start time, Movie.name, as in this situation the relation
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and how to represent that a Movie can have many Tickets? I shall write a buy-ticket method inside the Ticket class or Movie class.
(are there any thing not right with this movie class? thanks)
============================
class Movie
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============================
this is the question
A small ABC cinema has just purchased a computer for its new automated reservations system. You have been asked to program the new system. You are to write a Java application to assign seats on each movie show on the day (capacity: 20 seats for 1 movie).
Your program should display the following alternatives: ��Please type 1 for couple seat section�� and ��Please type 2 for normal seat section��. If the user types 1, your program should assign one seat in the couple seat section (seats 1 �C 10). If the person types 2, your program should assign a seat in the normal seat (seats 11 �C 20). Your program should also prompt for the movie time and movie name.
Your program should then display:
I.     The person��s seat number
II.     Whether it is a couple seat or normal seat of the cinema
III.     Time, date, movie name
Your program should never assign a seat that has already been assigned. When the normal seat section is full, your program should ask the person if it is acceptable to be placed in the couple seat section (and vice versa). If yes, make the appropriate seat assignment. If no, print the message ��Next show is in 3 hours time.��
(it is just a small test on my OOM learning, I know it is not necessary to make it so complex.)

Break down your problem into discrete chunks. The more you practice this, the more your initial thoughts will resemble the eventual objects that you will create.
Let's take address a few of your issues:
What has the start time? Is it the ticket or the movie? (Hint: Would someone ever print you out a ticket with a different start time than the movie's?)
If ticket and movie share some attributes, then you can either use inheritance or composition/delegation. In this instance, what makes more sense to you? Is a ticket a movie or vice versa? Or is a ticket simply related to a movie?
If a given object can contain several instances of another object, you will want to use either an array or a collection, probably List in this instance.
Why is there no Theater object? A movie may play at multiple theaters. Each theater has a capacity (in terms of total seats and number already booked). This does not really have anything to do with the movie. It is the Theater that you are booking. It may also have which movies are showing at which time.
Your notion of 'couple' booking seems strange. Why not have a concept like 'consecutive seats required'? That way, your design is more flexible and you can still accomodate couples.That should get you started. Best of luck.
- Saish

How to write Protect endprotect concept in Smartforms

hi
can any one suggest me
How to write Protect endprotect concept in Smartforms
i have some content to coem without break in SMARTFORM
how to do that
Thanks & Regards
kalyan
<thread moved, has nothing to do with ABAP Objects. Please choose your forums more carefully in future>
Edited by: Mike Pokraka on Sep 26, 2008 12:50 AM

Hi,
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Swing Tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/index.html
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Hi all,
I am anticipating to write some abap reports..Here is one of them..Anyone can help me with writing a Report , how to write 'G/L Distribution Report (AP) -
But since I am new to Abap , if you wish to reply, please use a little more detail and simple explanation, step by step so I can understand what is the idea(The Business use, and business idea of doing such report?), how it can be acheived...what kind of report should be used , techniques, tables etc..?.:)
Appreciate your help!
Regards,
Boby

Hi   ,
i am get your exact   report requirements , nay   , i will give you the   brief expalin.
AP -> Accoutns Payable   . so it deals with in Finnance to Vendor .   it means   you are   maintain the transcations of the payment s to the vendor . so thae table's are .
vendor master tables :
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ADRC -> Addresses (Business Address Services)
LFB1-> Vendor Master (Company Code) ....etc .
for finance   data
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BSEG->Accounting Document Segment
BSIS->Accounting: Secondary Index for G/L Accounts
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REGUH-> Settlement data from payment program ,....etc
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Thanks!

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create or replace procedure pro(p_number )
is
cursor c1 is select *from emp where empno=p_number;
v_file utl_file.file_type;
begin
v_file := utl_file.fopen('dirc','filename.txt','w');
for i in c1 loop
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closef(v_file);
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File should contains xml tags. can any one help regarding this.. with one example.
How to write the oracle data as XML format. (.XML file)

hi,
hope this example will do something....
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2 from employees where rownum < 6
EMPLOYEE_ID FIRST_NAME LAST_NAME PHONE_NUMBER
100 Steven King 515.123.4567
101 Neena Kochhar 515.123.4568
102 Lex De Haan 515.123.4569
103 Alexander Hunold 590.423.4567
104 Bruce Ernst 590.423.4568
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2 last_name, phone_number from employees where rownum < 6') xml
3 from dual;
*<?xml version="1.0"?>*
*<ROWSET>*
*<ROW>*
*<EMPLOYEE_ID>100</EMPLOYEE_ID>*
*<FIRST_NAME>Steven</FIRST_NAME>*
*<LAST_NAME>King</LAST_NAME>*
*<PHONE_NUMBER>515.123.4567</PHONE_NUMBER>*
*</ROW>*
*<ROW>*
*<EMPLOYEE_ID>101</EMPLOYEE_ID>*
*<FIRST_NAME>Neena</FIRST_NAME>*
*<LAST_NAME>Kochhar</LAST_NAME>*
*<PHONE_NUMBER>515.123.4568</PHONE_NUMBER>*
*</ROW>*
*<ROW>*
*<EMPLOYEE_ID>102</EMPLOYEE_ID>*
*<FIRST_NAME>Lex</FIRST_NAME>*
*<LAST_NAME>De Haan</LAST_NAME>*
*<PHONE_NUMBER>515.123.4569</PHONE_NUMBER>*
*</ROW>*
*<ROW>*
*<EMPLOYEE_ID>103</EMPLOYEE_ID>*
*<FIRST_NAME>Alexander</FIRST_NAME>*
*<LAST_NAME>Hunold</LAST_NAME>*
*<PHONE_NUMBER>590.423.4567</PHONE_NUMBER>*
*</ROW>*
*<ROW>*
*<EMPLOYEE_ID>104</EMPLOYEE_ID>*
*<FIRST_NAME>Bruce</FIRST_NAME>*
*<LAST_NAME>Ernst</LAST_NAME>*
*<PHONE_NUMBER>590.423.4568</PHONE_NUMBER>*
*</ROW>*
*</ROWSET>*
ask if you want more assistance.
thanks.

What is and how to write a report G/L Distribution Report (AP)?

Hi all,
I am anticipating to write some Abap reports..Here is one of them..Anyone can help me with writing a Report , how to write 'G/L Distribution Report (AP) -
But since I am new to Abap , if you wish to reply, please use a little more detail and simple explanation, step by step so I can understand what is the idea(The Business use, and business idea of doing such report?), how it can be acheived...what kind of report should be used , techniques, tables etc..?.:)
Appreciate your help!
Regards,
Boby

hi,
tables : bsid all data
bsad augdt > rundate
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pass bldat & rundate as parameter.
on basis of days put CASE condition.
raj

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