El autor Pedro Valderas ha publicado 8 artículo(s):

Nowadays, end-users’ environment is plenty of services that support their life style, and involving them in the process of service creation can allows them to benefit from a cheaper, faster, and better service provisioning. There are already tools targeted to the authoring and
consumption of services. However these tools consider end-users as isolated individuals, missing the potential that their social environment can bring to them. In this paper, we investigate how social networks can be used to improve the authoring and consumption of services by end-users. We propose a social network of service compositions as a valuable
mechanism to share knowledge among end-users in order to improve their skills in composing new services. In addition, we analyse the underlying relationships created among service compositions in order to provide end-users with an intuitive way of browsing them.

Autores: Pedro Valderas / Victoria Torres / Vicente Pelechano / 
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With the advent of Web 2.0 and the massive adoption of smartphones, end-users are more keen to actively participate in the creation of content for the Internet. In addition, the big amount of data that the Internet of Things can bring to it, establishes an ideal framework to allow end-users not just consuming data but also creating new valueadded services. To achieve this, in this work we propose the development of an end-user tool for smartphones capable of composing services that are available in the Internet.

Autores: Ignacio Mansanet / Victoria Torres / Pedro Valderas / Vicente Pelechano / 
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Autores: Jesús Ortiz / Victoria Torres / Pedro Valderas / 
Palabras Clave: Adaptación - BPMN - Coreografía - evolución - Microservicios

Although end-users have available a lot of on-line services to be con- sumed individually, it is their composed usage what has the potential to create new value-added services for end-users. In this sense, many efforts have been done to allow end-users to compose the services that they need by themselves. However, most of these solutions present two main problems: (1) they provide little support to help end-users to browse interminable lists of services, and (2) they present the blank piece of paper problem, which appears when end-users have to face an empty canvas to define a composition without any help to find the services that better fit their needs. In this paper, we present a solution to im- prove these problems by using natural language processing techniques in order to search and select the services end-users need to accomplish a specific goal. This solution has been implemented in the context of the EUCalipTool platform.

Autores: Pedro Valderas / Victoria Torres / Vicente Pelechano / 
Palabras Clave: Mobile authoring Tool - Natural Language Processing - Service Selection and Composition

This paper faces the challenge of defining a microservice composition approach that provides the benefits of orchestration and choreography composition mechanisms. The main goal is to provide a solution that allows developers to have a centralized model that describes the big picture of a microservice composition and also to have the possibility of executing the composition defined in this model through an event-based choreography. The modeling language used to create such centralized model is the one provided by the BPMN process diagram. In particular, we introduce a proposal that provides the possibility of 1) defining the microservice composition in a BPMN model to have the big picture of the whole composition, which facilitates further analysis and maintenance when requirements change, and 2) executing the BPMN model by following an event-based choreography to provide a high degree of decoupling and independence to implement and maintain microservices. To this end, the paper presents (1) a set of guidelines to create microservice compositions in BPMN models, split them into fragments, and distribute these fragments among microservices to be executed through an event-based choreography, (2) a microservice architecture defined to support the coexistence of the two descriptions of a composition (i.e., the big picture and the split one), and (3) tool support in order to implement the proposed microservice architecture in Java/Spring technology.

Autores: Pedro Valderas / Victoria Torres / Vicente Pelechano / 
Palabras Clave: BPMN - Choreography - composition - microservices

JCIS_2015_submission_10The Internet of Things (IoT) offers a new eco-system of heterogeneous and distributed services that is available anytime and anywhere and that can be potentially accessed by any properly connected device. However, these available services are usually consumed in isolation, missing the potential that their combined usage can bring as new added-value services. In addition, the massive end-user adoption and usage of smartphones together with their powerful capabilities turn this type of devices into a promising platform to develop and execute these added-value services compositions. Moreover, end-users are nowadays getting more and more familiar with technology, fact that allows them to participate more actively in the development of new types of applications. However, this will not happen until we provide end-users with more powerful and easy-to-use tools. To this end, this paper presents an architectural solution to allow end-users building IoT services compositions by just focusing on domain-logic issues.

Autores: Ignacio Mansanet / Victoria Torres / Pedro Valderas / Vicente Pelechano / 
Palabras Clave: End-user Development - IoT - Service Compositions

Microservices must be composed to provide users with complex and elaborated functionalities. According to the decentralized nature of micro-services, choreographies is the most appropriate style to achieve such com-position. However, this style forces to distribute the flow logic of the com-position among the participating microservices making difficult its analysis and update. The Business Process Model and Notation (BPMN) provides a graphical notation widely used in academia and industry to specify business processes. Within the microservice composition context, this notation can be used to create the big picture of such compositions. However, this notation is usually considered in orchestration-based solutions, and orchestration can be a drawback to achieve the decoupling pursued by a microservice architecture. Therefore, in this demo paper we present the architectural solution and its realization in Java/Spring technology to support an approach that allows defining a microservice composition keeping the benefits of both composition mechanisms, i.e., orchestration and choreography. Specifically, the supporting tool allows 1) defining the microservice com-position in a BPMN model to have the big picture of the whole composition, which facilitates further analysis and maintenance when requirements change, and 2) splitting this BPMN model into fragments that are distributed among microservices in order to be executed by following an event-based choreography of BPMN fragments, which provide a high degree of de-coupling and independence to implement and maintain microservices. This composition approach is supported by a microservice architecture defined to achieve that both descriptions of a composition (big picture and split one) coexist.

Autores: Pedro Valderas / Victoria Torres / Vicente Pelechano / 
Palabras Clave: Architecture - BPMN - Choreography - composition - microservices