Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2012
ABSTRACT Tourism is an emerging target area for interactive mobile device applications. This pape... more ABSTRACT Tourism is an emerging target area for interactive mobile device applications. This paper evaluates the performance of a multiobjective interactive urban route planner that calculates walking routes for tourists in urban areas. The system allows tourists to choose a walking route between two locations that is short, but at the same time traverses interesting tourist areas. The main characteristics of the system are an intuitive interactive interface, the management of multiple objectives, and local computation on the user's device. Related aspects, like the retrieval of contextual tourist information relevant to route planning, are also discussed.
Proceedings of the 1st international conference on Aspect-oriented software development - AOSD '02, 2002
A s p e c tO r i e n t e d P r o g r a m m i n g separates in a new dimension, n a m e d aspect, ... more A s p e c tO r i e n t e d P r o g r a m m i n g separates in a new dimension, n a m e d aspect, those features t h a t are spread over different c o m p o n e n t s in a system. In this p a p e r we present a D y n a m i c A O F r a m e w o r k where software c o m p o n e n t s and aspects are first-order entities composed d y n a m i c a l l y at runt i m e according to t h e a r c h i t e c t u r a l information stored in a middleware layer. As an e x a m p l e we describe the coordination aspect, one of the m o s t relevant and useful aspects of our approach, essential to develop open d i s t r i b u t e d systems. T h e m a i n functionality of this aspect is to encapsulate the interaction protocol a m o n g a set of components.
Software Agents are becoming one of the most important approaches for developing open distributed... more Software Agents are becoming one of the most important approaches for developing open distributed systems. Interoperability is a critical issue to develop open and flexible agent-based applications, as it would make reusability possible across heterogeneous agent systems. Agent interoperability can be achieved through the use of FIPA standardized specifications. Although most major FIPA-compliant platforms have reached a consensus on the different alternative specifications to interoperate, for other platforms this would remain an open issue. For the latter cases FIPA suggests the use of gateways, but sometimes it is not possible to extend or provide the basic gateway for all cases. This paper presents an approach for developing heterogeneous agent-based systems regardless of the FIPA-compliant agent platforms involved. The basis of our proposal is the use of component technology for the development of adaptive software agents. Our compositional software agent separates the distribution of messages according to different transport services, which reduces platform dependency on the agent coordinated behaviour. This agent capability allows using these agents as gateways between agent platforms, providing an immediate solution to interoperability.
... The MAS encompasses different software agents representing the entities of a VANET (vehicles,... more ... The MAS encompasses different software agents representing the entities of a VANET (vehicles, road signal and services), which provide a distrib-uted environment for the simulation of context-aware agent-based applications for VANETs. ...
Autonomic computing (AC) is a promising approach to meet basic requirements in the design of wire... more Autonomic computing (AC) is a promising approach to meet basic requirements in the design of wireless sensor networks (WSNs), and its principles can be applied to efficiently manage nodes operation and optimize network resources. Middleware for WSNs supports the implementation and basic operation of such networks. In this systematic literature review (SLR) we aim to provide an overview of existing WSN middleware systems that address autonomic properties. The main goal is to identify which development approaches of AC are used for designing WSN middleware system, which allow the self-management of WSN. Another goal is finding out which interactions and behavior can be automated in WSN components. We drew the following main conclusions from the SLR results: (i) the selected studies address WSN concerns according to the self-*properties of AC, namely, self-configuration, self-healing, self-optimization, and self-protection; (ii) the selected studies use different approaches for managin...
Ambient Intelligence (AmI) represents a new generation of computing environments equipped with a ... more Ambient Intelligence (AmI) represents a new generation of computing environments equipped with a wide range of small devices and appliances present everywhere, available for everyone and at all times (Weiser, 1991). AmI technologies are mainly based on the combination of concepts from ubiquitous and pervasive computing
International Journal of Ambient Computing and Intelligence, 2009
AmI technologies have to produce software embedded in a wide variety of everyday objects and devi... more AmI technologies have to produce software embedded in a wide variety of everyday objects and devices with critical resource limitations. Furthermore, they must provide support to different types of applications and to many different kinds of users. The application of a Software Product Line approach would be very useful to express the different requirements of either devices or applications in terms of commonalities and variabilities when defining a family of AmI middleware platforms. A feature model for the AmI domain will help to specify and automatically derive different configurations of middleware tailored according to a large number of constraints. The aim of this article is to highlight the complexity of managing different types of variability during the development of applications for AmI environments. A generic process for automatically generating a custom configuration of a middleware variant is also presented.
2009 Joint Working IEEE/IFIP Conference on Software Architecture and European Conference on Software Architecture, WICSA/ECSA 2009, 2009
One promising approach to tackle software evolution in AOSD is model-based pointcuts, where point... more One promising approach to tackle software evolution in AOSD is model-based pointcuts, where pointcuts are defined in terms of elements of a conceptual model, which are less susceptible to evolution than elements of the base model. We propose the definition of model-based pointcuts at the architectural level and identify three layers in the definition of our conceptual model: the system, the domain-specific and the application-specific layer. An MDD process drives the definition of conceptual and aspect models, their instantiation and composition. AO-ADL is used to implement it.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2011
The automatic transformation of software agent designs into implementations for different agent p... more The automatic transformation of software agent designs into implementations for different agent platforms is currently a key issue in the MAS development process. Recently several approaches have been proposed using model driven development concepts to specify ...
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2012
ABSTRACT Agents are a good option to develop Internet of Things (IoT) systems with self-managemen... more ABSTRACT Agents are a good option to develop Internet of Things (IoT) systems with self-management capacities. Current agent technology offers the necessary means to manage many of the requirements of self-management satisfactorily, however agent approaches for lightweight devices do not provide support for self-configuring agents' internal functionality adequately. This paper describes part of the Self-StarMAS approach for self-managing the IoT, which uses aspect-oriented mechanisms to model self-managing tasks. Aspect-orientation facilitates the adaptation and reconfiguration of the Self-StarMAS agents' internal architecture. This paper focuses on describing the internal composition of aspects, which is performed by an internal weaver at runtime.
2013 8th International Symposium on Software Engineering for Adaptive and Self-Managing Systems (SEAMS), 2013
Mobile applications run in environments where the context is continuously changing. Therefore, it... more Mobile applications run in environments where the context is continuously changing. Therefore, it is necessary to provide support for the run-time adaptation of these applications. This support is usually achieved by middleware platforms that offer a context-aware dynamic reconfiguration service. However, the main shortcoming of existing approaches is that both the list of possible configurations and the plans to adapt the application to a new configuration are usually specified at design-time. In this paper we present an approach that allows the automatic generation at run-time of application configurations and of reconfiguration plans. Moreover, the generated configurations are optimal regarding the provided functionality and, more importantly, without exceeding the available resources (e.g. battery). This is performed by: (1) having the information about the application variability available at runtime using feature models, and (2) using a genetic algorithm that allows generating an optimal configuration at runtime. We have specified a case study and evaluated our approach, and the results show that it is efficient enough as to be used on mobile devices without introducing an excessive overhead.
Adaptive and Reflective Middleware on Proceedings of the International Workshop - ARM '11, 2011
Pervasive systems need to be dynamically reconfigured in order to properly adapt to the changes t... more Pervasive systems need to be dynamically reconfigured in order to properly adapt to the changes that continuously occur in their environment. This is usually achieved by building these systems on top of a middleware platform that offers, among others, a context-monitoring service and a dynamic reconfiguration service. In this paper we evaluate the suitability of using Aspect-Oriented Software Development to
This paper describes an MDD process that enhances the architectural design phase by closing the g... more This paper describes an MDD process that enhances the architectural design phase by closing the gap between ADLs and the notations used at the detailed design phase. We have defined modelto-model transformation rules to automatically generate either aspectoriented or object-oriented UML 2.0 models from high-level architectural specifications specified using AO-ADL. These rules have been integrated in the AO-ADL Tool Suite, providing support to automatically generate a skeleton of the detailed design that preserves the crosscutting and the non-crosscutting functionalities identified at the architecture level.
The effective management and composition of architectural variabilities has long been of importan... more The effective management and composition of architectural variabilities has long been of importance to product line architects. Architects need to describe how conceptual variabilities are composed and realised through architectural decompositions of a product line. Architecture variabilities need to be described in terms of the chosen design decompositions, which do not often correspond naturally to feature model decompositions. Also, the fine-grained nature of certain architectural variabilities makes it difficult to represent them in a modular fashion, and describe how they are composed across different views. In order to address these issues, this paper presents a variability modelling language (VML), which supports first-class representation of heterogeneous forms of architectural variabilities. The language complements existing architectural modelling approaches for product lines by providing mechanisms to: (i) explicitly reference variation points in multiple architectural views, and (ii) support compositions involving both fine-grained and coarse-grained variabilities in an orthogonal fashion. The completeness and simplicity of VML is assessed through four case studies from different domains.
Proceedings of the 15th workshop on Early aspects - EA '09, 2009
Aspect-oriented (AO) techniques are emerging as promising approaches to enhance the representatio... more Aspect-oriented (AO) techniques are emerging as promising approaches to enhance the representation of crosscutting concerns throughout the software lifecycle. This includes new AO specification mechanisms for the architectural design stage that is at the heart of the software process. However, existing modelling languages have failed short to provide simple and scalable notations for visually representing the so-called "architectural aspects". This paper reports our ongoing effort on the definition of a visual architecture representation for aspect-oriented systems. Our proposal follows a symmetric approach and provides a more expressive set of visual elements in order to: (i) provide a more intuitive notation for expressing aspectual compositions, (ii) facilitate a symbiotic transition of AO requirements specifications to AO architecture designs, (iii) make the transition of architectural descriptions to AO detailed designs more straightforward, and (iv) improve the early detection of modularity anomalies in aspect-oriented design. We discuss the advantages and drawbacks of our modelling proposal in terms of two applications from different domains.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2012
ABSTRACT Tourism is an emerging target area for interactive mobile device applications. This pape... more ABSTRACT Tourism is an emerging target area for interactive mobile device applications. This paper evaluates the performance of a multiobjective interactive urban route planner that calculates walking routes for tourists in urban areas. The system allows tourists to choose a walking route between two locations that is short, but at the same time traverses interesting tourist areas. The main characteristics of the system are an intuitive interactive interface, the management of multiple objectives, and local computation on the user's device. Related aspects, like the retrieval of contextual tourist information relevant to route planning, are also discussed.
Proceedings of the 1st international conference on Aspect-oriented software development - AOSD '02, 2002
A s p e c tO r i e n t e d P r o g r a m m i n g separates in a new dimension, n a m e d aspect, ... more A s p e c tO r i e n t e d P r o g r a m m i n g separates in a new dimension, n a m e d aspect, those features t h a t are spread over different c o m p o n e n t s in a system. In this p a p e r we present a D y n a m i c A O F r a m e w o r k where software c o m p o n e n t s and aspects are first-order entities composed d y n a m i c a l l y at runt i m e according to t h e a r c h i t e c t u r a l information stored in a middleware layer. As an e x a m p l e we describe the coordination aspect, one of the m o s t relevant and useful aspects of our approach, essential to develop open d i s t r i b u t e d systems. T h e m a i n functionality of this aspect is to encapsulate the interaction protocol a m o n g a set of components.
Software Agents are becoming one of the most important approaches for developing open distributed... more Software Agents are becoming one of the most important approaches for developing open distributed systems. Interoperability is a critical issue to develop open and flexible agent-based applications, as it would make reusability possible across heterogeneous agent systems. Agent interoperability can be achieved through the use of FIPA standardized specifications. Although most major FIPA-compliant platforms have reached a consensus on the different alternative specifications to interoperate, for other platforms this would remain an open issue. For the latter cases FIPA suggests the use of gateways, but sometimes it is not possible to extend or provide the basic gateway for all cases. This paper presents an approach for developing heterogeneous agent-based systems regardless of the FIPA-compliant agent platforms involved. The basis of our proposal is the use of component technology for the development of adaptive software agents. Our compositional software agent separates the distribution of messages according to different transport services, which reduces platform dependency on the agent coordinated behaviour. This agent capability allows using these agents as gateways between agent platforms, providing an immediate solution to interoperability.
... The MAS encompasses different software agents representing the entities of a VANET (vehicles,... more ... The MAS encompasses different software agents representing the entities of a VANET (vehicles, road signal and services), which provide a distrib-uted environment for the simulation of context-aware agent-based applications for VANETs. ...
Autonomic computing (AC) is a promising approach to meet basic requirements in the design of wire... more Autonomic computing (AC) is a promising approach to meet basic requirements in the design of wireless sensor networks (WSNs), and its principles can be applied to efficiently manage nodes operation and optimize network resources. Middleware for WSNs supports the implementation and basic operation of such networks. In this systematic literature review (SLR) we aim to provide an overview of existing WSN middleware systems that address autonomic properties. The main goal is to identify which development approaches of AC are used for designing WSN middleware system, which allow the self-management of WSN. Another goal is finding out which interactions and behavior can be automated in WSN components. We drew the following main conclusions from the SLR results: (i) the selected studies address WSN concerns according to the self-*properties of AC, namely, self-configuration, self-healing, self-optimization, and self-protection; (ii) the selected studies use different approaches for managin...
Ambient Intelligence (AmI) represents a new generation of computing environments equipped with a ... more Ambient Intelligence (AmI) represents a new generation of computing environments equipped with a wide range of small devices and appliances present everywhere, available for everyone and at all times (Weiser, 1991). AmI technologies are mainly based on the combination of concepts from ubiquitous and pervasive computing
International Journal of Ambient Computing and Intelligence, 2009
AmI technologies have to produce software embedded in a wide variety of everyday objects and devi... more AmI technologies have to produce software embedded in a wide variety of everyday objects and devices with critical resource limitations. Furthermore, they must provide support to different types of applications and to many different kinds of users. The application of a Software Product Line approach would be very useful to express the different requirements of either devices or applications in terms of commonalities and variabilities when defining a family of AmI middleware platforms. A feature model for the AmI domain will help to specify and automatically derive different configurations of middleware tailored according to a large number of constraints. The aim of this article is to highlight the complexity of managing different types of variability during the development of applications for AmI environments. A generic process for automatically generating a custom configuration of a middleware variant is also presented.
2009 Joint Working IEEE/IFIP Conference on Software Architecture and European Conference on Software Architecture, WICSA/ECSA 2009, 2009
One promising approach to tackle software evolution in AOSD is model-based pointcuts, where point... more One promising approach to tackle software evolution in AOSD is model-based pointcuts, where pointcuts are defined in terms of elements of a conceptual model, which are less susceptible to evolution than elements of the base model. We propose the definition of model-based pointcuts at the architectural level and identify three layers in the definition of our conceptual model: the system, the domain-specific and the application-specific layer. An MDD process drives the definition of conceptual and aspect models, their instantiation and composition. AO-ADL is used to implement it.
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2011
The automatic transformation of software agent designs into implementations for different agent p... more The automatic transformation of software agent designs into implementations for different agent platforms is currently a key issue in the MAS development process. Recently several approaches have been proposed using model driven development concepts to specify ...
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), 2012
ABSTRACT Agents are a good option to develop Internet of Things (IoT) systems with self-managemen... more ABSTRACT Agents are a good option to develop Internet of Things (IoT) systems with self-management capacities. Current agent technology offers the necessary means to manage many of the requirements of self-management satisfactorily, however agent approaches for lightweight devices do not provide support for self-configuring agents' internal functionality adequately. This paper describes part of the Self-StarMAS approach for self-managing the IoT, which uses aspect-oriented mechanisms to model self-managing tasks. Aspect-orientation facilitates the adaptation and reconfiguration of the Self-StarMAS agents' internal architecture. This paper focuses on describing the internal composition of aspects, which is performed by an internal weaver at runtime.
2013 8th International Symposium on Software Engineering for Adaptive and Self-Managing Systems (SEAMS), 2013
Mobile applications run in environments where the context is continuously changing. Therefore, it... more Mobile applications run in environments where the context is continuously changing. Therefore, it is necessary to provide support for the run-time adaptation of these applications. This support is usually achieved by middleware platforms that offer a context-aware dynamic reconfiguration service. However, the main shortcoming of existing approaches is that both the list of possible configurations and the plans to adapt the application to a new configuration are usually specified at design-time. In this paper we present an approach that allows the automatic generation at run-time of application configurations and of reconfiguration plans. Moreover, the generated configurations are optimal regarding the provided functionality and, more importantly, without exceeding the available resources (e.g. battery). This is performed by: (1) having the information about the application variability available at runtime using feature models, and (2) using a genetic algorithm that allows generating an optimal configuration at runtime. We have specified a case study and evaluated our approach, and the results show that it is efficient enough as to be used on mobile devices without introducing an excessive overhead.
Adaptive and Reflective Middleware on Proceedings of the International Workshop - ARM '11, 2011
Pervasive systems need to be dynamically reconfigured in order to properly adapt to the changes t... more Pervasive systems need to be dynamically reconfigured in order to properly adapt to the changes that continuously occur in their environment. This is usually achieved by building these systems on top of a middleware platform that offers, among others, a context-monitoring service and a dynamic reconfiguration service. In this paper we evaluate the suitability of using Aspect-Oriented Software Development to
This paper describes an MDD process that enhances the architectural design phase by closing the g... more This paper describes an MDD process that enhances the architectural design phase by closing the gap between ADLs and the notations used at the detailed design phase. We have defined modelto-model transformation rules to automatically generate either aspectoriented or object-oriented UML 2.0 models from high-level architectural specifications specified using AO-ADL. These rules have been integrated in the AO-ADL Tool Suite, providing support to automatically generate a skeleton of the detailed design that preserves the crosscutting and the non-crosscutting functionalities identified at the architecture level.
The effective management and composition of architectural variabilities has long been of importan... more The effective management and composition of architectural variabilities has long been of importance to product line architects. Architects need to describe how conceptual variabilities are composed and realised through architectural decompositions of a product line. Architecture variabilities need to be described in terms of the chosen design decompositions, which do not often correspond naturally to feature model decompositions. Also, the fine-grained nature of certain architectural variabilities makes it difficult to represent them in a modular fashion, and describe how they are composed across different views. In order to address these issues, this paper presents a variability modelling language (VML), which supports first-class representation of heterogeneous forms of architectural variabilities. The language complements existing architectural modelling approaches for product lines by providing mechanisms to: (i) explicitly reference variation points in multiple architectural views, and (ii) support compositions involving both fine-grained and coarse-grained variabilities in an orthogonal fashion. The completeness and simplicity of VML is assessed through four case studies from different domains.
Proceedings of the 15th workshop on Early aspects - EA '09, 2009
Aspect-oriented (AO) techniques are emerging as promising approaches to enhance the representatio... more Aspect-oriented (AO) techniques are emerging as promising approaches to enhance the representation of crosscutting concerns throughout the software lifecycle. This includes new AO specification mechanisms for the architectural design stage that is at the heart of the software process. However, existing modelling languages have failed short to provide simple and scalable notations for visually representing the so-called "architectural aspects". This paper reports our ongoing effort on the definition of a visual architecture representation for aspect-oriented systems. Our proposal follows a symmetric approach and provides a more expressive set of visual elements in order to: (i) provide a more intuitive notation for expressing aspectual compositions, (ii) facilitate a symbiotic transition of AO requirements specifications to AO architecture designs, (iii) make the transition of architectural descriptions to AO detailed designs more straightforward, and (iv) improve the early detection of modularity anomalies in aspect-oriented design. We discuss the advantages and drawbacks of our modelling proposal in terms of two applications from different domains.
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Papers by L. Fuentes