Re: [staf-devel] STAF Respool Service

[David B. <bd...@us...>]

Sekhar,

It depends on whether you are using STAF 2.x or STAF 3.0.  Note that 
whenever you call the "STAF" command executable, a unique handle is 
assigned for that call, and when it is complete, that handle is no longer 
active.  In STAF 2.x that means that the resource pool entry would still 
be "owned" by that handle, even though the handle is no longer active:

$ staf local respool request pool STAFDemo random
Response
--------
Resource2

$ staf local respool query pool STAFDemo
Response
--------

Description: STAF Demo Resource Pool

Pending requests: 0

Resources:

Resource1;Available
Resource2;Owned;dave2268;STAF/Client;17;20050319-08:07:42;20050319-08:07:42

This is not an ideal situtation, since you now need to manually force the 
resource pool entry to be released.  In STAF 3.0, we have introduced a 
feature called "Garbage Collected Handles".  In STAF 3.,0, when handles go 
away, services like Respool and Sem, which base their ownership 
information, in part, on handles, will be informed when the handle goes 
away, and can automatically clean up the resources.  So in STAF 3.0, you 
will see:

$ staf local respool request pool STAFDemo random
Response
--------
Resource2

$ staf local respool query pool STAFDemo
Response
--------
{
  Description     : STAF Demo Resource Pool
  Pending Requests: []
  Resources       : [
    {
      Entry: Resource1
      Owner: <None>
    }
    {
      Entry: Resource2
      Owner: <None>
    }
  ]
}

Notice that the handle was Garbage Collected after the REQUEST command 
completed, and that is why the subsequent QUERY shows that Resource2 is 
not owned.

Let us know if you have any more questions.

David Bender
STAF/STAX Development
8-1268 (512-838-1268) 
IBM Austin Bldg. 903-5B002
Internet: bd...@us...




Sekhar B Neela <sek...@in...> 
Sent by: sta...@li...
03/19/2005 07:07 AM

To
sta...@li...
cc

Subject
[staf-devel] STAF Respool Service










Hi,
       I wanted to know, what is the expected behaviour when i request for
a resource from command prompt.
for example,
                      c:\STAF LOCAL  RESPOOL  REQUEST POOL STAFDemo RANDOM
After the above REQUEST command,  if I query from command prompt what is
the expected behaviour?
for example
            c:\STAF LOCAL  RESPOOL  QUERY  POOL STAFDemo


Thanks & Regards,
sekhar.



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