Abstract
Although the MERODE approach was initially developed for the development of new intranet-based applications, its concepts also suit the problem of application or component integration very well [45, 46]. Essentially, the event layer leads to an event-driven target architecture. The principles of such architecture can easily be applied to achieve component integration. Components are typically coarser grained than individual business objects and are usually conceived as a black box to the outside world: they may contain multiple business objects but do not publish individual interfaces to each of these individual business objects. Therefore, in a component integration context, event-based interaction will occur at the level of components rather than at the level of individual business objects.
This chapter is a reworked and shortened version of the following journal paper ‘Snoeck M, Lemahieu W, Goethals F, Dedene G, Vandenbulcke J, Events as atomic contracts for application integration, Data & Knowledge Engineering, 51(1), 81–107. © 2003 Elsevier’. The material from this paper has been integrated in this book with the kind permission of Elsevier.
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Notes
- 1.
We will use the generic term ‘component’. Depending on the actual environment, this component may also be a genuine application or a web service.
- 2.
For applications that also adopt the event-based approach for the interaction between their internal components, the application level preconditions to an event can be derived as the combination of the preconditions imposed by the application’s internal components that participate in the event.
- 3.
At least it avoids the necessity of rollbacks caused by failed events. An underlying transaction management mechanism might still use rollbacks to enforce transaction atomicity at the database level.
- 4.
If this is not the case, a mediation broker could provide a mapping based on ontological descriptions of the events.
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Snoeck, M. (2014). Application and Component Integration. In: Enterprise Information Systems Engineering. The Enterprise Engineering Series. Springer, Cham. https://doi.org/10.1007/978-3-319-10145-3_12
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DOI: https://doi.org/10.1007/978-3-319-10145-3_12
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