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Service Oriented Computing (SOC) allows programmers to build distributed applications by putting together (i.e., orchestrating) existing services exported by remote providers. The main source of complexity in building such kind of orchestrations is the need for anticipating and explicitly handling (i.e., programming ad-hoc countermeasures) possible changes in the external environment that may affect them, like faults invoking services removed by their providers. To ease the job of programmers the authors developed DSOL, an innovative infrastructure supporting design and execution of service orchestrations. It combines a declarative approach to model the orchestration with planning mechanisms to actually run it.
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