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Rania Khalaf
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| Adresse: |
Software Engineer
Component Systems Group
IBM TJ Watson Research Center
Hawthorne, NY |
| E-Mail: |
rkhalaf(at)us.ibm.com
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| Thesis Outline |
| In the SOA world, the core task of application
integration has become the complex yet equally vital task of
service aggregation in a world where one must relinquish control
of the parts making up one’s (now-heavily-distributed)
applications. We are mainly concerned with the aggregation of
service oriented applications, focusing on BPEL4WS and its related
and complimentary technologies. We take a deep look at BPEL’s
combination of flat-graph and structured approach to process
definition by formalizing the use of scopes and the propagation of
fault handling, and the design time computation of compensation
order for mixed models such as BPEL where links cross scope
boundaries. Applications are created either top-down from a global
process description or bottom-up. For the former, one defines
directly a process for each service, such as our work on
RosettaNet. For the latter, we provide a mechanism to break down a
business process among different participants based on allocation
of work items, instead of on partner message exchanges. We aim to
support the graph-based processes that include loops, fault
handlers, and transactional scopes. We will use coordination
protocol for features beyond graph-based control flow. Whether one
connects applications top-down or bottom-up, a wiring model is
still required to define the connections of these applications in
relation to each other. Additionally, there should preferably be
some flexibility in how the services get ahold of the EPRs of
their partners |
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