Advanced Web Services by Peter Dolog, Michael Schäfer, Wolfgang Nejdl (auth.), Athman

By Peter Dolog, Michael Schäfer, Wolfgang Nejdl (auth.), Athman Bouguettaya, Quan Z. Sheng, Florian Daniel (eds.)

Web providers and Service-Oriented Computing (SOC) became thriving components of educational study, joint university/industry learn initiatives, and novel IT items out there. SOC is the computing paradigm that makes use of internet prone as construction blocks for the engineering of composite, disbursed functions out of the reusable program good judgment encapsulated via net companies. internet prone might be thought of the best-known and so much standardized expertise in use at the present time for disbursed computing over the net.

This publication is the second one installment of a two-book assortment protecting the state of the art of either theoretical and functional facets of net prone and SOC study and deployments. Advanced net Services in particular makes a speciality of complex issues of net providers and SOC and covers subject matters together with internet companies transactions, protection and belief, internet provider administration, real-world case experiences, and novel views and destiny instructions.

The editors current foundational issues within the first publication of the gathering, Web companies Foundations (Springer, 2013). jointly, either books contain nearly 1400 pages and are the results of an incredible neighborhood attempt that concerned greater than a hundred authors, comprising the world’s top specialists during this field.

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An abstract service does not directly implement any operations, but rather functions as a management unit, which allows to: • define a list of Web services which implement the required capabilities, • invoke a service from the list in order to process requests which are sent to the abstract service, • replace a failed service with another one from the list without a failure of the transaction, and • process externally triggered compensations on the running transaction. To the outside, it provides an abstract interface and can be used like any other Web service, and uses the same mechanisms like SOAP [15] and WSDL [4].

However, the abstract service is a management component for forward recovery compensation handling, which wraps multiple con- 1 Design and Management of Web Service Transactions with Forward Recovery 19 crete services that offer the same functionalities and can thus replace each other. The abstract service is therefore a mediator between a client and the concrete service that performs the required operations. At the same time, the adapter functions as a mediator between transaction coordinator, abstract service and concrete service to ensure proper transactional context and to provide the means to intercept failure notifications and create messages required in the compensation handling process.

Dolog et al. 5 Discussion The evaluation of the approach is discussed in detail in [19]. Here we provide a summary of the findings: The experiments showed that in our environment about twice as many transactions as in a standard environment finish successfully. Furthermore, a similar improvement can also be found if we look at how many transactions finish in one minute. The number of messages sent in the environment is of course higher, which is, however, compensated by the increased number of transactions that do not have to roll back.

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