âComposability in OOâ, âAspect-Oriented Programmingâ and âAspects & Dimensions ... Invited talk: Bart De Win ..... 2.5 Object-Oriented Composition is Tangled.
... is supported by EPSRC. Grant MULDRE (EP/C003330/1) and Portuguese FCT ... [18] I. Sommerville, P. Sawyer, Requirements Engineering - A. Good Practice ...
One of the advantages of advanced separation of concerns approaches is .... uation risks are associated with problems of evaluating off-the-shelf software for use ..... offs advantages and disadvantages of conventional and ASoC approaches, ...
IBM T. J. Watson Research Center, New York, USA. {rouvellou, suttonsm .... dimensions of middleware are application developers, middleware developers, and ...
Mar 28, 2017 - text of reinforcement learning (RL), where the goal is to learn a policy for an ..... parallel. It also occurs in similar architectures (e.g., see Foerster et al., 2016). ..... ing agents based on deep neural networks to solve various
Software engineering development methods have been created with this principle in mind. However, concerns such as security, fault tolerance and usability are ...
Separation of concerns is a fundamental software engineering principle that proposes ..... on this catalogue are Legal Issues and Correctness. For each of these ...
in the context of AspectJ [8] it would mean the Java Virtual. Machine (JVM) [14] and for Eos [20] it would mean the .NET Framework [15]. .... C# for Microsoft .
In the Annotation implementations there is a single call to the procedure, so this concern ...... European Conference on Object-Oriented Programming. (ECOOP) ...
followed in the specified package, the ways to facilitate code enhancement are provided. Hook Architecture is followed in. Wordpress, Drupal, etc., in ...
software plans, separation of concerns, aspects. 1. INTRODUCTION ..... also an implicit ordering dependency between the âBinary filesâ concern and the file, ...
Method Call as instruction in ISA. Object-Orientation. Objects and Virtual Method Calls. Aspect-Orientation. An Open Question. Figure 2: Support at the Interface ...
itory of such CSL's is provided. Furthermore, a bridge is built between the Software Factories and the MDA ap- proaches. After having done a survey of current ...
Figure 2: Support at the Interface Improved the Benefits of SoC Techniques consuming. Unit testing .... test-debug cycle common in current agile software develop- ment processes. ... Often a custom class loader is needed. There are load-time ...
Feb 1, 2007 -
Managing Separation of Concerns in Grid Applications ... Grid, MDE, Software Architecture, Model Transformation. 1. .... project : http://www.arch-ware.org.
Mar 2, 2012 - ing the commonality and variability of software product lines (SPLs) in ... merge, slice) provides practical support for separation of concerns in ...
despite intentional interference. This article investigates the separation of the rst three concerns, namely application functionality, distribution structure, and fault ...
development and management artifacts, describes a pattern for structuring units ... The â4+1 viewâ model separates the static structure of software development ...
MDD aims to shift the focus of software de- velopment activity from coding to modeling. Application development starts with an ab- stract specification A, which is ...
position of model transformations sequences (model trans- formation workflows) up to now ... tions of model transformation chain [25], composition of model transformations [16] ..... have to interact to create the final product. Thus, a clear in-.
Nov 15, 1996 - Consider for example, an electronic mail object. This object provides operations for defining the sender, receiver and the content of the mail.
A system programming language serves for the design of .... web page generation using PHP, JSP (Java Server Pages) or ASP (Active Server Pages),.
Service-Oriented Computing (SOC) is a relative new and exciting paradigm for distributed computing. Key goals (from a de
With such, efforts developers code the application assuming that providers adhere ... DI4WS is instead based on pervasive development patterns (Dependency ...
Separation of Concerns in Service-Oriented Applications Based on Pervasive Design Patterns Cristian Mateos, Marco Crasso, Alejandro Zunino, Marcelo Campo ISISTAN Research Institute - UNICEN and CONICET (Argentina)
Problem statement Service-Oriented Computing (SOC) is a relative new and exciting paradigm for distributed computing Key goals (from a developer's perspective): Reusability Discoverability (e.g. UDDI) Loose coupling
The Web Service canonical model
Problem statement (cont.) Service-Oriented Computing (SOC) is a relative new and exciting paradigm for distributed computing Key goals (from a developer's perspective): Reusability Discoverability (e.g. UDDI) Loose coupling
So, how do we take advantage of these three without making SOC development a painful experience?
Related efforts Many of the existing approaches consider service-related details when invoking Web Services as crosscutting concerns Existing efforts share a common idea, i.e. to isolate applications from such details
Separation of concerns seems to be the right path towards truly loose coupling Layering (Daios, WSIF, Apache CXF) Source code annotations (Spring) AOP (WSSI, WSML)
Related efforts (cont.) Some related efforts are contract-subordinated, or API-based: WSIF, Apache CXF, Daios, Spring, WSSI and WSML With such, efforts developers code the application assuming that providers adhere to abstract contracts, which is not true Other efforts also consider service contracts as crosscutting concerns Generative Programming is used to free developer from adapting providers' specific contracts to abstract contracts Motahari Nezhad et al., (framework placeholders) Cavallaro et al. (custom XML-based mapping language) Nagano et al. (generic formal specifications)
Our proposal - DI4WS DI4WS advocates to a code-first approach to service outsourcing Unlike existing code-first approaches, DI4WS avoids the usage of ad-hoc languages and formalisms DI4WS is instead based on pervasive development patterns (Dependency Injection and Adapters) DI4WS is based on the well-established component-oriented development paradigm and assumes good development practices DI4WS is technology-agnostic (we have an implementation based on Java/Spring/WSDL2Java though)
DI4WS - Component model
Loose coupling in DI4WS Lightweight formalism If a SOC application with m internal components {C1..Cm} invokes n services {S1..Sn}, its overall Ce (Efferent Coupling) can be determined by: m n
C e =∑ ∑ C ij i=1 j =1
When Ci j = 1, the in-house component Ci is coupled to the contract of Sj
Loose coupling in DI4WS Lightweight formalism (cont.) non DI4WS
