15:42 / 6-3-2001
Krishnan,
I just want to test on the existence of the remote
system, and the ability to reply !
The socket class you mention creates a socket and waits until the
socket is connected or gets a timeout. If it is connected no
problem, but when the system is offline the timeout could be around
2 to 10 seconds for example. This is not ok for me. I want an
immediate reply from the socket if the system is offline.
Maybe a java ping/telnet on a specific port would be sufficient,
but this is not implemented in Java.
groeten / regards,
Marco Pas
CMG Trade, Transport & Industry B.V.
--------------------------------------------
KS> Hi Marco,
KS> I would suggest using the Socket class's
KS> "setSoTimeout(int milliseconds)"
KS> i.e. only if you *absolutely* need to use the socket class.
KS> I noticed that you were using WLS 5.1, and if you
KS> are doing this from within your EJB's, this is restricted
KS> by the EJB spec 1.1 (If WLS indeed allows it, as you
KS> mention, you might need to take into account that
KS> other EJB vendors might be more 'strict' and hence
KS> your code might not be portable across containers)
KS> -krish
>> >From: Marco Pas <[EMAIL PROTECTED]>
>> >Reply-To: Marco Pas <[EMAIL PROTECTED]>
>> >To: [EMAIL PROTECTED]
>> >Subject: EJB container, back office systems and sockets
>> >Date: Tue, 6 Mar 2001 13:10:54 +0100
>> >
>> >13:05 / 6-3-2001
>> >
>> >
>> > In our application (running on WL 5.1 Servicepack 8) we have to
KS> access
>> >a remote
>> > machine via a socket connection, this to retrieve remote data.
>> > I know this is not in the specs but we have to do so !
>> >
>> > When the remote machine is ok the socket connection is accepted
>> > very quickly. But when the remote system is ofline it takes about 2
>> > minutes to get an answer back from the socket. (a timeout occurs)
>> >
>> > If i have a lot of requests this fills all my available threads on
>> > waiting back-office systems.
>> >
>> > Does anyone know how to tackle this problem, i want to check if the
>> > remote system is alive and capable of answering !
>> >
>> > regards,
>> > Marco Pas
>> >
>>
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>>
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