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In this paper, we propose a new approach for modeling compound SOA design patterns. The goal is to easily building and allowing the mass customization of compound design patterns. In this regard, we have used the paradigm of Software Product Line (SPL). The SPL development is realized through several tasks. In this work, the elaboration of the variability model, in particular the cardinality-based feature model, has been considered. We propose to compose this model with three related layers. Thus, it will be easy to interpret and to understand. The first layer expresses the existing dependencies and constraints between design patterns. Thus, only valid compound design patterns can be obtained. The second one illustrates the functional requirements. The third one shows the non-functional constraints.

In Service Oriented Architecture (SOA), many feature modeling approaches of Service Provider (SP) have been proposed, notably: the two widely used service contracts WSDL and WADL. By studying these approaches, we found that they suffer from several problems, notably: they only work for specific communication technologies (e.g., SOAP or REST) and they do not explicitly model SOA Design Pattern (DPs) and their compounds. One major benefit of using a DP or a compound DP is to develop SPs with proven design solutions. In this paper, in order to overcome these problems, we propose an approach that integrates Software Product Line (SPL) techniques in the development of SPs. Essentially, we propose a Feature Model (FM), which is the defacto standard for variability modeling in SPL, for the feature modeling of SP. This FM, named F M SP , is designed as a DP-based service contract for SP that models different features including 16 SOA DPs and their compounds that are related to the service messaging category. Its objective to enable developers to generate fully functional, valid, DP-based and highly customized SPs for different communication technologies. Through a practical case study and a developed tool, we validate our F M SP and demonstrate that it reduces the development costs (effort and time) of SPs.

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The service contract is one of the fundamental design principles in the Service Oriented Architecture (SOA). Its goal is to express the features (e.g., services and capabilities) of Service Providers (SPs) so Service Consumers (SCs) can identify them to communicate correctly. The two most known service contracts in the literature are: WSDL for SOAP and WADL for REST. We identify that these service contracts suffer from several problems (e.g., they only allow expressing a limited set of features). Also, we notice from the literature a lack of service contracts dedicated for SC. In order to overcome these problems, we propose two Features Models (FMs) based on SOA design patterns that can be considered as generic and formal service contracts for SP and SC. We propose extensions to the Feature MetaModel (FMM) and semantic constraints that ensure generating fully functional, valid, customized and consistent SPs and SCs from the proposed FMs.