Re: [gridsam-discuss] BES interface

[Steve C. <s.c...@om...>]

Hi Y.Tanaka,

Yes, the OGSA-BES v1.0 interface is indeed supported within GridSAM.  By
default, the GridSAM service already has this interface ready for use,
so from the client, in the omii-uk-client/gridsam/bin directory for
example, you can run:

./bes-create-activity -s
https://yourserver:port/gridsam/services/bes?wsdl -j something.jsdl

An EndpointReference (EPR) will be returned on std output which uniquely
identifies the job, e.g. (formatted for clarity):

<?xml version="1.0" encoding="UTF-8"?>
<EndpointReference xmlns="http://www.w3.org/2005/08/addressing">
<Address>https://blade10.omii.ac.uk:18443/gridsam/services/bes</Address>
  <ReferenceParameters>
    <JobIdentifier xmlns="http://www.icenigrid.org/service/gridsam">
      <ID>urn:gridsam:18ce6dd322a31d1b0122a70745c90028</ID>
    </JobIdentifier>
  </ReferenceParameters>
</EndpointReference>

...which you can capture like this:

./bes-create-activity -s
https://yourserver:port/gridsam/services/bes?wsdl -j something.jsdl >
epr.text

And then use the following to check the status of the submission (see
caveat below!):

./bes-get-activity-statuses -s
https://yourserver:port/gridsam/services/bes?wsdl -file epr.text

Which returns a GetActivityStatusResponse with the status(es) included.
 This epr file can contain a number of EPRs, which means you can query
the status of many jobs at a time.

You can also use the bes-terminate-activities command in a similar
manner to pre-emptively kill jobs, and similarly the
bes-get-activity-documents command to return JSDLs that were submitted
for a given list of jobs.

Of course, being an open interface, you should be able to use any
BES-v1.0 compliant client to submit jobs to GridSAM using this
interface, although the tricky part is to configure compatible security
between the BES client and GridSAM.  In addition, GridSAM also supports
HPC Basic Profile v1.0 and HPC Profile Application Extension v1.0, which
may be handy to look at when constructing JSDL that works between
different BES implementations.


In terms of how to use this interface within a client-side Java
application, you can see how to use the API by looking within
modules/client/src/main/java/org/icenigrid/gridsam/client/cli/ within
the GridSAM source release on SourceForge, and looking at the API docs
within the client release e.g.
omii-uk-client/gridsam/docs/gridsam-client/apidocs

At the moment, however, there are a number of minor issues with the BES
interface we are currently working on:

-- Completed documentation for the BES interface, support and commands

-- The bes-* commands currently return the following message when used:
{http://schemas.xmlsoap.org/soap/envelope/}encodingStyle already exists

...on the first line, which doesn't cause the commands to fail, but is a
nuisance.  When submitting a job using bes-create-activity, you can
filter this out using something like:

./bes-create-activity -s
https://yourserver:port/gridsam/services/bes?wsdl -j something.jsdl |
grep -v 'encodingStyle already exists' > epr.text

Which removes the unwanted message and ensures the EPR can be used
correctly.

-- The bes-get-factory-attributes-document command (which returns a list
of available computational resources provided by the BES service)
currently isn't supported within the Globus connector.

Out of interest, could I ask how you are currently using GridSAM?  And
also, how you intend to use the BES interface?  It's always very
valuable to know how our products are being used, and this can help us
to be more informed when helping you in the future.

I hope this helps, please let us know if you have any further questions,

Regards,

Steve Crouch

田中　義一 wrote:
> Hello
> 
> I have installed and used Gridsam2.1.4 by globus engine.
> Paper says that Gridsam supports OGSA-BES standard.
> If we can use BES-interface, please show me examples(how to 
> use this interface in GridSAM)
> 
> Thanks in advance.
> 
> National Institute of Informatics
> Y.Tanaka
> 
> 
> 
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-- 
Dr Stephen Crouch,
Software Architect,
OMII-UK,
School of Electronics and Computer Science,
Room 4067, Level 4, Building 32,
University of Southampton,
Highfield, Southampton SO17 1BJ
Tel: +44 (0)23 8059 8787        EMail: s.c...@om...
Fax: +44 (0)23 8059 3045        WWW: http://www.ecs.soton.ac.uk/~stc