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 | | From: | Randall T | | Subject: | Re: Dynamically create Variant Data Socket items with multiple writers | | Date: | Fri, 21 Jan 2005 13:10:44 -0600 (CST) |
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unclebump wrote:
Could you accomplish this using a funct=
ional global architecture??
An interest=
ing concept which might work and did just open up a new host of possibiliti=
es!
When I get the time I might give this a try. I just did a quick =
test in another program.
Through VI server I opened a reference to =
a remote machine. I then created strictly typed reference to a =E2=80=9Cfun=
ctional global vi=E2=80=9D that I knew would be in memory. It reads the fun=
ctional global just fine!
Thanks for the suggestion.
Here is =
the work around I used for the data socket program.
Here is the orig=
inal problem.
I needed to know on the server side when a new value was w=
ritten to the message cluster, which consisted of a string and a variant. C=
hecking the string portion of the cluster let me know what command to send =
the device being controlled on the server machine. The variant is used to h=
old the various parameters that accompanied the command. Since the same com=
mand type could be sent several times I needed to reset the string control =
after the server read the command. This required writing to the data socket=
from the client & server machine (multiple writers). Also since the client=
could be any PC in the subnet I needed to allow all these machines to have=
write access.
I solved this by using a second data socket item for=
the new message flag. This item is a string value that could be pre-define=
d and set to allow multiple writers. I then used the cluster item to handle=
the commands and wrote to the string item a signal that a new command was =
ready. The server then recognizes a new command is ready, reads the command=
, and then flags the string message received.
Thanks again for those=
who took the time to answer this.
Randall
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