Accessing grid resources from portals and applications

The users of Grid-based applications and portals must be able to access Grid resources from different contexts, using high-level abstraction and full control of access parameters. Globus Toolkit, which is the most important solution for building Grid infrastructures, offers command line clients for access different resources such as data transfer using Grid FTP protocol and job submission using Gram services. But these clients are difficult to be used from different application and portals. This paper presents a complete and concise solution for the problem of access Grid resources from portals and applications through development of context-independent Java clients for accessing data transfer and execution management, and these clients can be used from applications and portals more efficiently and simpler than using command line clients offered by Globus Toolkit.