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If app 1 launches app 2, app 2 should initiate the conversation, since app 1 should be ready to listen by the time it launches app 2, whereas app 1 would not know how long it was going to take app 2 to reach the point where it is listening.
On Apr 15, 2005, at 2:15 PM, Brian Yennie wrote:
When do you trigger "sendData"? When I put this into two stacks and open
them, it puts them both into "accept" mode, but neither sends anything to
the other.
I was just triggering it from the message box, but it should work from anywhere once both stacks are open.
What I'm trying to accomplish is that App 1 launches, it in turn launches
App 2, and both of them are in a two-way communication session...
Any suggestions on scripting the critical "who talks first" step? Because if
someone talks before the other one is listening, you're hosed...
Well, if App 1 is launching App 2, wouldn't App 1 do the first talking?
Why are you hosed? I guess that's the crux- it shouldn't hose anything (other than not being able to make the connection). Can you lower the socketTimeoutInterval and have App 1 keep trying after it launches app 2?
Something like this maybe? The idea would be that either application would look for the other when it was launched. If it was able to connect, it knows it is application #2. Otherwise, if the connection times out, it is app #1 and it launches application #2. In turn, that second application should be able to connect back. If you set the timeout value low and make asynchronous calls, it should be pretty snappy.
Is this along the right lines?
global myAppNumber
## look for an existing application 1 and open our own listener on openStack lookForFirstApplication accept connections on port 9000 with message "gotConnect" end openStack
## try to connect to the other app on lookForFirstApplication set the socketTimeoutInterval to 5000 open socket to port 8999 with message "foundApplication1" end lookForFirstApplication
## found it, we must be app #2.. we could safely start talking after this
on foundApplication1 s
close socket s
put 2 into myAppNumber
end foundApplication1
## couldn't connect, so we must be application #1 ## now launch the second app, which will connect back to us on socketTimeout s close socket s put 1 into myAppNumber launchApplication2 end socketTimeout
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$ ln -s /usr/share/kjvbible /usr/manual
$ true | cat /usr/manual | grep "John 3:16"
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
$
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