Solved

can i write this in other format?

Posted on 2004-04-10
5
194 Views
Last Modified: 2010-03-31
thx..

here is the code?
can i write the function in void process(..) in other format?

----------------------
class Server
{

void Do(String w) { . . . }

void Process(final String line)
{ Thread t = new Thread() { public void run() { Do(line);
}
};
t.start();
}
}

Server (InputStream instream) { BufferedReader in = new BufferedReader(new InputStreamReader(instream));
String line;
try { while ((line = in.readLine()) != null) { Process(line);
}
}catch (IOException e) { }
}
}
0
Comment
Question by:tom_mk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 
LVL 14

Accepted Solution

by:
Tommy Braas earned 250 total points
ID: 10800004
You can do what you're thinking, but I would strongly recommend against as you would be starting a thread per line in a file. This is bad as threads are expensive to create, and switch between.
0
 

Author Comment

by:tom_mk
ID: 10800031
example?
0
 
LVL 24

Assisted Solution

by:sciuriware
sciuriware earned 250 total points
ID: 10800203
If you think that the processing of those data must be done parallel, the only reason could be
that you're on a system with, say, 16 CPU's. That makes sense.
However, if the # of lines in the file is much greater than 16, you will waste a lot of time with all those
threads.

I had to write something similar, well, you can create a collection (synchronised like Vector)
where threads may pick one line by one line to do their work.
Then you start as many threads as makes sense (16 in the case above).

Now, every thread can loop: pick a line, process it, pick a line .... until exhausted.
That will be very efficient.

In my case I had to start a thread on every single data set, but then I linked the threads also in a vector.
Every thread started looked in that vector to see if its rank was higher than the # of CPU's.
If so it slept for a while; this way no more threads were running than CPU's available,
still all datasets had a thread and so a run-status that could be retrieved.

You may choose.

;JOOP!
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
Java contains several comparison operators (e.g., <, <=, >, >=, ==, !=) that allow you to compare primitive values. However, these operators cannot be used to compare the contents of objects. Interface Comparable is used to allow objects of a cl…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…

696 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question