Information Technology Reference
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Fig. 12.2 Sample views of portlets at different service levels
downloading them. In addition to the use of the ASM API, the advanced service
level portlet utilizes the Remote API to facilitate execution of user code calling the
SSF workflows in the form of web services. The portlet uses the ASM API for
preparing and executing a workflow which wraps the user code and auxiliary
files,
while the Remote API calls are used for handling the execution of an individual
SSF workflow requested by the user code. While the portlets of simple and
advanced service levels are realized within the framework of this customized
gateway, the expert service level support is entirely provided by the generic
WS-PGRADE portlets. Sample views of portlets at all three service levels are
shown in Fig.
12.2
: simple at the top-left, advanced at the middle, and expert
service level at the bottom.
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