The Internet became a standard way of exchanging business data between B2B and B2C applications and with this came the need for providing various services on the web instead of just static text and images. Web services are a new type of services offered via the web that aid in the creation of globally distributed applications. Web services are enhanced e-business applications that are easier to advertise and easier to discover on the Internet because of their flexibility and uniformity. In a real life scenario it is highly difficult to decide which J2EE application server to go for when deploying a enterprise web service. This thesis analyzes the various ways by which web services can be developed & deployed. Underlying protocols and crucial issues like EAI (enterprise application integration), asynchronous messaging, Registry tModel architecture etc have been considered in this research. This paper presents a report by analyzing what various J2EE application servers provide by doing a case study and by developing applications to test functionality.

In the modern computing landscape, the challenge of tuning software systems is exacerbated by the necessity to accommodate multiple divergent execution environments and stakeholders. Achieving optimal performance requires a different configuration for every combination of hardware setups and business requirements. In addition, the state of the art in system tuning can involve complex statistical models and tools which require deep expertise not commonly possessed by the average software engineer. As an alternative approach to performance tuning, this thesis puts forward the use of sonification-conveying information via non-speech audio-to aid software engineers in tuning complex systems. In particular, this thesis designs, develops, and evaluates a tuning system that interactively (i.e., in response to user actions) sonifies the performance metrics of a computer system. This thesis demonstrates that interactive sonification can effectively guide software engineers through performance tuning of a computer system. To that end, a scientific survey determined which sound characteristics (e.g., loudness, panning, pitch, tempo, etc.) are best suited to express information to the engineer. These characteristics were used to create a proof-of-concept tuning system that was applied to tune the parameters of a real world enterprise application server. Equipped with the tuning system, engineers-not experts in enterprise computing nor performance tuning-were able to tune the server, so that its resulting performance surpasses that exhibited under the standard configuration. The results indicate that sound-based tuning approaches can provide valuable solutions to the challenges of configuring complex computer systems. / Master of Science

L'informatique dans les nuages propose une alternative économique et performante au déploiement traditionnel sur site. Une utilisation efficace des nuages passe par une diminution des ressources consommées et une adaptation du déploiement à l'environnement cible. Nous proposons, dans cette thèse, une solution pour le déploiement de logiciels à la juste taille, c'est-à-dire en ne déployant que les dépendances nécessaires sur un environnement cible. Nous suivons une définition du déploiement basée sur les architectures à composants. Le contenu et les dépendances d'un logiciel sont capturés grâce au modèle à composants Fractal SoftwareUnit. Ce modèle offre une fine granularité de la représentation, le support de l'hétérogénéité des logiciels et des environnement cibles, ainsi qu'un contrôle distribué des logiciels. Nous proposons une mise en œuvre du modèle au travers du canevas SU Framework. Enfin, nous décrivons comment résoudre deux problèmes issus de besoins industriels, à l'aide de ce canevas : la définition de profils pour le serveur d'applications JOnAS et le déploiement d'applications hétérogènes sur cibles hétérogènes. / Cloud computing offers an economical and efficient alternative to traditional deployment on site. Effective use of cloud computing goes through a reduction of resource consumption and deployment tailored to the target environment. We propose, in this thesis, a solution for deploying softwares at fair size, by considering only the necessary dependencies to a target environment. We follow a definition of deployment based on component architecture. The content and dependencies of softwares are captured through the Fractal SoftwareUnit component model. This model offers a fine granularity of representation, the support of software heterogeneity and environmental targets, just as a distributed control of software. SU Framework is an implementation of this model. Finally, we describe how to solve two problems arising from industrial needs, by using the proposed framework : définition of profiles for the JOnAS application server and deployment of heterogeneous applications on heterogeneous targets.