listen to multiple sockets

[max junker]

hello,

this subject has been discussed many times in here, but a solution was
not found as far as could get to know. but perhaps newer developments of
java made one possible that i dont know of.

the problem is how i can read from multiple sockets without having to
create a new thread for each, which, i guess, affects the programms
performance if the number of connections to a server is very high.
would it practicable to use a thread that loops throug all open connections
and tests with the available() method if there is data that could be
read and then a worker thread can handle the rest? i dont know how effec-
tive the available method ist working, but i dont really think that this
is a serios possibility, is it?
so, can anyone give me a hint how to do this best?

max junker

[Missaka Wijekoon]

I am no java expert, but available may use the poll() system call at the
native interface to your socket. If it does you should be able to do so,
safely. Also, the new JDK has async i/o - which may also help.

-Misk

max junker wrote:

hello,

this subject has been discussed many times in here, but a solution was
not found as far as could get to know. but perhaps newer developments of
java made one possible that i dont know of.

the problem is how i can read from multiple sockets without having to
create a new thread for each, which, i guess, affects the programms
performance if the number of connections to a server is very high.
would it practicable to use a thread that loops throug all open connections
and tests with the available() method if there is data that could be
read and then a worker thread can handle the rest? i dont know how effec-
tive the available method ist working, but i dont really think that this
is a serios possibility, is it?
so, can anyone give me a hint how to do this best?

max junker

[Chris]

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max junker wrote:

[snip]

the problem is how i can read from multiple sockets without having
to create a new thread for each, which, i guess, affects the

[snip]

Hi,
One word: SocketChannels. When you create a SocketChannel for each
connection, you can register each one with a Selector. Then, one
thread just calls Selector.select(), and then handles everything that
there is to be handled on all connections. You can even use the same
Selector with ServerSocketChannels.

- --
Chris
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[max junker]

thank you very much!
Thats exactly what i was looking for!
obviously it`s sometimes worth to check new features
in the API!

max junker

Chris <ch*******@hotmail.com> wrote in message news:<Zws8b.70$Cu3.12@edtnps84>...

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Hash: SHA1

max junker wrote:

[snip]

the problem is how i can read from multiple sockets without having
to create a new thread for each, which, i guess, affects the

[snip]

Hi,
One word: SocketChannels. When you create a SocketChannel for each
connection, you can register each one with a Selector. Then, one
thread just calls Selector.select(), and then handles everything that
there is to be handled on all connections. You can even use the same
Selector with ServerSocketChannels.

- --
Chris
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