TGQR 2010Q4 Report.pdf - Teragridforum.org

Figure 8. Total CPU Consumption per institution. Included in the figure is a screen shot of the
entire XDMoD portal
Role-based Access to XDMoD: The various roles that will be defined in XDMoD were specified
for the initial XDMoD 1.0 release this summer at TG 11. It was decided to have 5 distinct roles:
NSF Program Officer, Center Director, Principal Investigator, User and Public. Further detail on
the access levels assigned to each role are given in the attached Appendix 1. It is anticipated that
the specific information available in each of the roles will be further refined based on discussion
with NSF and XD leadership.
XDMoD Additional Progress: Developing a client for a complex and fast-changing software API
can be challenging. To assist 3 rd party developers (as well as internal developers needing to
interface with XDMoD components), we have created a tool to make this task easier. The
XDMoD REST API Call Builder, shown in Figure 9, provides a mechanism for a developer to
iteratively and hierarchically construct a RESTful API URL to perform their desired query or
action. Using a programming language feature called Reflection, the API Call Builder inspects
the publically available API interfaces for all available Controllers and Models to guide a
developer through the construction of a valid API URL. Starting with the selection of the
appropriate controller, the developer is provided with a list of available choices for each level in
the URL hierarchy and steps through the process of constructing a valid URL for the desired API
call. The URL is initially displayed with each required component in red and changes these to
green as the developer makes the required choices. A test is included that checks for errors and
the proper completion of the call and displays the call output. This tool is currently being used
for internal diagnostic usage, and still being enhanced for eventual use by external developers,
such as the developers of the TG/XD User portal.
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