Context-Aware Mobile Services Transactions

Younas, Muhammad; Mostéfaoui, Soraya Kouadri

doi:10.1109/aina.2010.157

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…If the failure cannot be defined, it brings back the composite service to a consistent state using compensation mechanisms. The authors in [12] developed a new model for context-aware transactions in the context of mobile services. This model provides a relaxed set of transaction correctness criteria called SACReD (Semantic Atomicity, Consistency, Resiliency, Durability) and a supporting protocol.…”

Section: Literature Reviewmentioning

confidence: 99%

How Can Transactional Semantics Enhance the Commit Rate of Context-aware Service Composition in Advanced Pervasive Systems?

Ettazi

Riane²,

Nassar

2021

Int. J. Recent Contrib. Eng. Sci. IT

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Context-aware composition of services exhibiting transactional properties poses several challenges. A major challenge is the transactional behavior of candidate services which is subject to perpetual change while the composition is running. Compositions of services displaying transactional properties must be dynamically adapted at run time to cope with context fluctuations. By dynamic adaptation, we refer to the ability to alter the composition behavior in response to changes affecting its execution. We focus on changes impacting the successful commit rate of transactional service composition. This has led us to explore the trail of a flexible homeomorphism between alternative behaviors. We propose a behavioral adaptation approach that adjusts the behavior of transactional compositions of services in a proactive and transparent manner. This strategy is based on the Profiled Task Class concept. A service composition generator has also been developed for the performance evaluation of components implementing the behavioral adaptation strategy in order to identify its impact on the commit rate of CATS compositions.

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Section: Literature Reviewmentioning

confidence: 99%

How Can Transactional Semantics Enhance the Commit Rate of Context-aware Service Composition in Advanced Pervasive Systems?

Ettazi

Riane²,

Nassar

2021

Int. J. Recent Contrib. Eng. Sci. IT

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“…The proposed model is implemented as a prototype, called "Smart Campus" [22]. The implementation architecture is shown in Figure 7.…”

Section: Prototype Implementationmentioning

confidence: 99%

A new model for context-aware transactions in mobile services

Younas

Mostéfaoui

2011

Pers Ubiquit Comput

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With the ubiquity of handheld devices (such as smart phones and PDAs) and the availability of a wide range of mobile services (such as mobile banking, road traffic updates, and weather forecast) people can nowadays access information and conduct online transactions virtually anywhere and anytime. In such flexible, dynamic but less reliable environment, transaction management technology is believed to provide service reliability and data consistency. Indeed, in mobile and ubiquitous environments where devices as well as services can, seamlessly join and leave the ubiquitous network, transaction management can be very helpful during the recovery of services from failure. Current transaction models and commit protocols do not take into account context information. However, in mobile environments it is imperative to consider context information in the commit of a transaction -i.e., a transaction can be successfully completed if it meets the required context. In this paper we propose a new model for context-aware transactions and their performance management in mobile environments. Unlike conventional transactions, context-aware transactions adapt to the required context. By context we mean the service context as well as the user's context that includes user's needs and preferences. This paper designs and develops the proposed transaction model and evaluates its performance in terms of time and message complexities as well as transaction's throughput.

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“…Context-aware transaction systems have been applied to different fields. In mobile applications, it should be considered changes in the network states from on-line to off-line and viceversa if transactions are taking place [39][40][41]. There are Radio Frequency IDentification (RFID) systems [42] which should provide a context-aware intelligence in order to guarantee a secure transaction verification.…”

Section: Context-aware Transactionsmentioning

confidence: 99%

Testing of transactional services in NoSQL key-value databases

Gonzlez-Aparicio

Younas

Tuya

et al. 2018

Future Generation Computer Systems

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Abstract-Transactional services guarantee the consistency of shared data during the concurrent execution of multiple applications. They have been used in various domains ranging from classical databases through to service-oriented computing systems to NoSQL databases and cloud. Though transactional services aim to ensure data consistency, NoSQL databases prioritise efficiency/availability over data consistency. In order to address these issues various transaction models and protocols have been proposed in the literature. However, testing of transactions in NoSQL database has not been addressed. In this paper, we investigate into the testing of transactional services in NoSQL databases in order to test and analyse the data consistency by taking into account the characteristics of NoSQL databases such as efficiency, velocity, etc. Accordingly, we develop a framework for testing transactional services in NoSQL databases. The novelty and contributions are that we develop a context-aware transactional model that takes into account contextual requirements of NoSQL clients and the system level setting in relation to the data consistency. This can assist NoSQL application developers in choosing between transactional and non-transactional services based on their requirements of the level of data consistency. The framework also provides ways to analyse the impact of the big data requirements and characteristics (e.g., velocity, efficiency) on the data consistency of NoSQL databases. The evaluation and testing are carried out using a widely used NoSQL key/value database, Riak, and a real (open) and big data from the Council of London for public transportation of the London bus services.

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Context-Aware Mobile Services Transactions

Cited by 7 publications

References 16 publications

How Can Transactional Semantics Enhance the Commit Rate of Context-aware Service Composition in Advanced Pervasive Systems?

How Can Transactional Semantics Enhance the Commit Rate of Context-aware Service Composition in Advanced Pervasive Systems?

A new model for context-aware transactions in mobile services

Testing of transactional services in NoSQL key-value databases

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