Ruby thread and gets

Ruby
1

Hi all
I’m trying to run two thread at one time in a program.
And one of them will receive user inputting msgs by gets().
another one will do something else at the same time.
they don’t communicate each other.

like this :

   thread_a =  Thread.new{
          loop do
               puts "please enter blah blah"
               msg = gets
               #do something
          end
  }
  thread_a.join
  thread_b = Thread.new{
           loop do
                 #do other things maybe  puts "im running im running

…"
end

 }
 thread_b.join

but when thread_a runs gets waiting for user input, whole program will
be
paused waiting for this, I mean thread_b will not working.
How can I handle this ?
Do I have to do this by running multi process?

2

On 21.08.2009 19:10, Im still wrote:

   thread_a =  Thread.new{

…"
end

 }
 thread_b.join

but when thread_a runs gets waiting for user input, whole program will be
paused waiting for this, I mean thread_b will not working.
How can I handle this ?

You are using threads like ordinary functions: you start a thread and
wait for it to finish before you start the next one. You should move
thread_a.join after the start of thread_b.

Do I have to do this by running multi process?

No.

Kind regards

robert

3

2009/8/22 Robert K. [email protected]

 thread_b = Thread.new{

How can I handle this ?

Kind regards

   robert

–
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

Thanks Robert. Seems I didn’t uderstand well with thr.join method…

4

2009/8/22 Im still [email protected]

another one will do something else at the same time.
}
but when thread_a runs gets waiting for user input, whole program will
Do I have to do this by running multi process?
http://blog.rubybestpractices.com/

Thanks Robert. Seems I didn’t uderstand well with thr.join method…

Still a question.
How can I implement a function that command line will keep on outputting
messages while it will still receive user’s keyboard inputtings just
like
Linux shell always does?

thanks.

5

On 21.08.2009 21:41, Im still wrote:

Still a question.
How can I implement a function that command line will keep on outputting
messages while it will still receive user’s keyboard inputtings just like
Linux shell always does?

Not sure what you mean: the console will happily print whenever
something is sent to it for printing. It seems your question is rather
about how to have work done in background while waiting for user input
in the foreground. I am not sure though whether it is a good idea to
clutter the terminal with output from background jobs when you want to
receive typed user input at the same time. It can be really hard to
keep track of what you typed when background output is copious.

Kind regards

robert

6

Actually, I’m trying to write a command line chatting program. Just for
fun.
With UDP.
And having troubles on controlling (managing ) threads between
outputting
received msg from other client and getting user typed commands.
Because, gets() method seems paused whole program, and if there are
messages
received from other client will not be displayed automatically.program
will
stay waiting for user input…
I don’t know if I’ve told things clear enough…

2009/8/22 Robert K. [email protected]