Rafiqul Haque

Modelling Business Transactions Across Service Supply Chain Networks

This chapter is concerned with understanding the complex nature of service network environments with particular attention on exploring business transactions across supply chains. Although business transactions have been traditionally well documented throughout literature, what becomes apparent is that these approaches fail to capture the dynamic complexity of modern service supply chains. To address the problem, this chapter introduces a method to model supply chain behaviour which is of particular interest at the network design time and offers a conceptual view of extracting network analysis and process metrics. We introduce a business transaction language (BTL) to gain insight into the business transactions while we also explore the application of social network analysis (SNA) to model the dynamism of service networks. In doing so, the research sets out to generate greater service network intelligence and extend the service network ontology while visualising the transactional interaction landscape.

PAEAN- a risk-mitigation framework for business transaction at run-time

The increasing complexity of the business transaction results in a higher potential risk in terms of SLA violation. The fulfillment of the QoS constraints specified in global SLA can be threatened at any time by different unexpected events that could occur during the execution of a business transaction. Unfortunately, there is no solution found that can efficiently mitigate this risk. Some of the current business transaction monitoring and managing solutions can monitor business transaction and report fault only after it happens. The framework proposed in this paper, monitors business transactions, computes potential risks and performsproactively adaptation actions in order to avoid global SLA violation that could causes transaction abortion.

A Multi-layer Approach for Customizing Business Services

The reusability of services is a cornerstone of the Service-Oriented Architecture design paradigm as it leads to a reduction in the costs associated with software development, integration and maintenance. However, reusability is difficult to achieve in practice as services are either too generic or overspecified for the tasks they are required to complete. This paper presents our work in defining an approach for achieving service reusability in Service-Based Applications (SBAs) by decomposing the reusability requirements into two layers and then into separate views that allow the customization of business policies, quality of service, tasks and control (i.e., orchestration/choreography) parameters. The objective of defining such an approach is to provide an appropriate solution that will guide the customization of a service’s functional and non-functional properties to allow it to be reused in different business contexts.

Negotiation towards Service Level Agreements: A Life Cycle Based Approach

Service Based Systems (SBSs) are composed of loosely coupled services. Different stakeholders in these systems, e.g. service providers, service consumers, and business decision makers, have different types of concerns which may be dissimilar or inconsistent. Service Level Agreements (SLAs) play a major role in ensuring the quality of SBSs. They stipulate the availability, reliability, and quality levels required for an effective interaction between service providers and consumers. It has been noticed that because of having conflicting priorities and concerns, conflicts arise between service providers and service consumers while negotiating over the functionality of potential services. Since these stakeholders are involved with different phases the life cycle, it is really important to take into consideration these life cycle phases for proposing any kind of SLA negotiation methodology. In this research, we propose a stakeholder negotiation strategy for Service Level Agreements, which is based on prioritizing stakeholder concerns based on their frequency at each phase of the SBS development life cycle. We make use of a Collaxa BPEL Orchestration Server Loan service example to demonstrate the applicability of the proposed approach. In addition, we simulate the negotiation priority values to predict their potential impact on the cost of the SLA negotiation.

A Service-Based System for Sentiment Analysis and Visualization of Twitter Data in Realtime

The existing solutions for sentiment analysis suffer from serious shortcomings to effectively deal with Twitter data as they can merely exploit hashtags. In this demo, we present SANA: a reusable, service-based architecture for dealing with streaming data, analysing this data on the fly taking into account more comprehensive semantics of Tweets, and dynamically monitoring and visualising trends in sentiments through dasbboarding and query facilities.

Cross-layer Service Adaptation - State-of-the-Art, Shortcoming Analysis, and Future Research Directions

In the past few years several cross-layer monitoring and adaptation technologies have been proposed. Although these are cross-layer adaptation technologies, however, in practice they focus on a particular layer. Some solutions involves two layers, yet none of the existing solutions do not consider all the layers during adaptation process. Furthermore, cross-layer adaptation approaches generate incompatibility problems. This is an adaptation coordination problem. Incompatibility refers to the situations where the adaptation is performed in a layer is not compatible with the constraints exposed by the other layers. This survey aims at studying and analyzing current approaches for web services adaptation, discussing their shortcomings and proposing research directions on cross-layer web service adaptation.