On Wed, 2012-04-18 at 12:18 -0700, cleaver at terabithia.org wrote:
On Wed, 2012-04-18 at 16:15 +0100, John Horne wrote:
I saw mention of 'usermsg' in the xymon(1) man page. Not sure if that could be used... more checking required I think.
This does indeed mirror the old BB way of doing things. Check out the [storedata] stanza within tasks.cfg and enable it to start storing "data" messages. "Data" messages don't generate a status column named after their test, and are stored directly on the disk (if storedata is enabled). They also aren't queryable remotely, but anything can subscribe to the "data" channel if you want to process the "data" datastream live.
Asynchronously looping over files in the data/data/ directory and doing something with them works too.
Hello,
Thanks for this. Do you use channels yourself to do anything like this?
Also I am wondering what the difference is between the 'data' channel and the 'usermsg' channel? If the usermsg channel is 'for whatever the user wants to use it for', then I would prefer using that.
I may be able to get away without actually storing anything if the process on the server-side is fast enough. I'm not sure how the mechanism works, or what happens if a message arrives whilst the process is already processing one. I assume there is some sort of 'wait' mechanism (having said that I think semaphores were mentioned somewhere?).
John.
-- John Horne, Plymouth University, UK Tel: +44 (0)1752 587287 Fax: +44 (0)1752 587001