By Stanislaw Ambroszkiewicz, Jerzy Brzeziński, Wojciech Cellary, Adam Grzech, Krzysztof Zieliński
This publication offers complex software program improvement instruments for building, deployment and governance of provider orientated structure (SOA) functions. Novel technical ideas and paradigms, formulated throughout the examine degree and through improvement of such instruments are provided and illustrated via useful utilization examples. for that reason this booklet can be of curiosity not just to theoreticians but in addition to engineers who focus on real-life difficulties. also, every one bankruptcy includes an summary of similar paintings, permitting comparability of the proposed strategies with exiting recommendations in a variety of components of the SOA improvement strategy. This makes the booklet fascinating additionally for college students and scientists who examine related matters.
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Extra info for Advanced SOA Tools and Applications
17 where nodes represent atomic services to be executed and the edges define dependencies between atomic services—Sprecedence ¸ relationships). For the composite service scenario graph of the service requested at the given moment, there is an equivalent graph in which nodes are sets of instances of atomic Fig. 17 Composite service scenario graph—an example 46 A. Grzech et al. services that constitute composite services. e. graphs that refer to concrete instances of atomic services). The request for composite service at the given moment can be characterized with requirements on values of the non-functional service parameters.
Hiding the real address of the service has deep meaning in a system like this. It allows SDRDS to manage the services and their instances in an independent manner for the execution engine in which only the address is important and that it remains constant. On the other hand, information about services might be used by the SDRDSBroker. It is a semi-internal module of SDRDS that presents the access point to the services. The SDRDS-Broker possesses information about the instances and the realization times regarding them, and can therefore suggest where the request should be directed.
The main role of the execution engine is to govern the process of services execution (and dynamic interpretation of requirements leading to service execution); however the configuration of the engine is in fact also something to distinguish it among other engines. We designed its core to be composed of several elements, quite like a composite service consists of atomic services. One of the elements is service interpretation and execution but we can add other elements or, as we call them, phases that introduce instructions like pre-processing, validation, full composition, and other actions such as a classification-based transformation of requirements to the composite service based on previous compositions.