Modern information systems may exploit numerous web services for communication. Each web service may exploit its own XML format for data representation which causes problems with their integration and evolution. Manual integration and management of evolution of the XML formats may be very hard. In this paper, we present a novel method which exploits a conceptual diagram. We introduce an algorithm which helps a domain expert to map the XML formats to the conceptual diagram. It measures similarities between the XML formats and the diagram and adjusts them on the base of the input from the expert. The result is a precise mapping. The diagram then integrates the XML formats and facilitates their evolution - a change can be made only once in the diagram and propagated to the XML formats.
{"title":"Semi-automatic Integration of Web Service Interfaces","authors":"Jakub Klímek, M. Nečaský","doi":"10.1109/ICWS.2010.28","DOIUrl":"https://doi.org/10.1109/ICWS.2010.28","url":null,"abstract":"Modern information systems may exploit numerous web services for communication. Each web service may exploit its own XML format for data representation which causes problems with their integration and evolution. Manual integration and management of evolution of the XML formats may be very hard. In this paper, we present a novel method which exploits a conceptual diagram. We introduce an algorithm which helps a domain expert to map the XML formats to the conceptual diagram. It measures similarities between the XML formats and the diagram and adjusts them on the base of the input from the expert. The result is a precise mapping. The diagram then integrates the XML formats and facilitates their evolution - a change can be made only once in the diagram and propagated to the XML formats.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116870976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an approach to the runtime management of decentralized service compositions. The goal of the approach is to transparently observe the behavior of peer-to-peer service interaction in order to permit the introduction of adaptive behavior. The design includes a monitoring component that utilizes a choreography model to formulate a global view of the application, and introduce adaptive behavior in a unique way. The design incorporates a mechanism for transforming the choreography to introduce redundancy, and dynamic selection in the interaction.
{"title":"Monitoring Decentralized Interacting Services with a Global State Choreography Model","authors":"O. Ezenwoye, Bin Tang","doi":"10.1109/ICWS.2010.108","DOIUrl":"https://doi.org/10.1109/ICWS.2010.108","url":null,"abstract":"This paper presents an approach to the runtime management of decentralized service compositions. The goal of the approach is to transparently observe the behavior of peer-to-peer service interaction in order to permit the introduction of adaptive behavior. The design includes a monitoring component that utilizes a choreography model to formulate a global view of the application, and introduce adaptive behavior in a unique way. The design incorporates a mechanism for transforming the choreography to introduce redundancy, and dynamic selection in the interaction.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123889354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guoquan Wu, Jun Wei, Chunyang Ye, Hua Zhong, Tao Huang
Runtime monitoring of Web service compositions with WS-BPEL has been widely acknowledged as a significant approach to understand and guarantee the quality of services. However, most existing monitoring technologies only track patterns related to the execution of an individual process. As a result, the possible inconsistency failure caused by implicit interactions among concurrent process instances cannot be detected. To address this issue, this paper proposes an approach to specify the behavior properties related to shared resources for web service compositions and verify their consistency with the aid of a parametric stateful aspect extension to WS-BPEL. Parameters are introduced in pattern specification, which allows monitoring not only events but also their values bound to the parameters at runtime to keep track of data flow among concurrent process instances. An efficient implementation is also provided to reduce the runtime overhead of monitoring and event observation. Our experiments show that the proposed approach is promising.
{"title":"Detecting Data Inconsistency Failure of Composite Web Services Through Parametric Stateful Aspect","authors":"Guoquan Wu, Jun Wei, Chunyang Ye, Hua Zhong, Tao Huang","doi":"10.1109/ICWS.2010.29","DOIUrl":"https://doi.org/10.1109/ICWS.2010.29","url":null,"abstract":"Runtime monitoring of Web service compositions with WS-BPEL has been widely acknowledged as a significant approach to understand and guarantee the quality of services. However, most existing monitoring technologies only track patterns related to the execution of an individual process. As a result, the possible inconsistency failure caused by implicit interactions among concurrent process instances cannot be detected. To address this issue, this paper proposes an approach to specify the behavior properties related to shared resources for web service compositions and verify their consistency with the aid of a parametric stateful aspect extension to WS-BPEL. Parameters are introduced in pattern specification, which allows monitoring not only events but also their values bound to the parameters at runtime to keep track of data flow among concurrent process instances. An efficient implementation is also provided to reduce the runtime overhead of monitoring and event observation. Our experiments show that the proposed approach is promising.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124091808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
SAP Netweaver Application Server (AS) provides two communication protocols to connect SAP ABAP (Advanced Business Application Programming) systems with external systems: Simple Object Access Protocol (SOAP) and Remote Function Call (RFC). RFC is the standard SAP interface for communication between SAP systems. SOAP is widely used in web service solutions for its nature cross-platform characteristic. It uses platform independent eXtensible Markup Language (XML) but it introduces more latency tags to represent the data. Thus, SOAP might need more memory and transferring time. This paper studies and compares their performance characteristic with introducing an evaluation model and then evaluates them for different use cases. This work gives a practical conclusion for protocol selection in special case.
SAP Netweaver Application Server (AS)提供了两种通信协议来连接SAP ABAP(高级业务应用程序编程)系统与外部系统:简单对象访问协议(SOAP)和远程功能调用(RFC)。RFC是SAP系统之间通信的标准SAP接口。SOAP因其跨平台特性而广泛应用于web服务解决方案中。它使用独立于平台的可扩展标记语言(XML)，但引入了更多延迟标记来表示数据。因此，SOAP可能需要更多的内存和传输时间。本文通过引入评价模型，对它们的性能特性进行了研究和比较，并针对不同的用例进行了评价。本文为特殊情况下的协议选择提供了一个实用的结论。
{"title":"Performance Evaluation for SOAP and RFC in SAP Netweaver Platform","authors":"Z. Cao, R. Jandhyala, Shiva Koduvayur","doi":"10.1109/ICWS.2010.114","DOIUrl":"https://doi.org/10.1109/ICWS.2010.114","url":null,"abstract":"SAP Netweaver Application Server (AS) provides two communication protocols to connect SAP ABAP (Advanced Business Application Programming) systems with external systems: Simple Object Access Protocol (SOAP) and Remote Function Call (RFC). RFC is the standard SAP interface for communication between SAP systems. SOAP is widely used in web service solutions for its nature cross-platform characteristic. It uses platform independent eXtensible Markup Language (XML) but it introduces more latency tags to represent the data. Thus, SOAP might need more memory and transferring time. This paper studies and compares their performance characteristic with introducing an evaluation model and then evaluates them for different use cases. This work gives a practical conclusion for protocol selection in special case.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126258621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In recent years, REST (Representational State Transfer) has received much attention for designing scalable web services in various domains. There is an increasing interest on its application to real-time communication web services. Based on a case study of CSTA services, we found that communication services exhibit a combination of complex message exchange and stateful behavior patterns, including multi-states, two-way interaction, event-driven, multi-resources, multi-responses and session management, that need to be modeled properly within the framework of REST. To address these challenges, we propose three REST design patterns: session, event subscription and relationship using REST composition. This approach leads to a systematic one-to-one transformation from CSTA to REST. We hope such a study on a concrete use case can contribute to a better understanding of REST and lead to a seamless convergence of communication services with the infrastructure of the Web.
近年来，REST (Representational State Transfer, Representational State Transfer)在设计各种领域的可伸缩web服务方面受到了广泛关注。它在实时通信web服务中的应用越来越受到关注。基于CSTA服务的案例研究，我们发现通信服务表现出复杂的消息交换和有状态行为模式的组合，包括多状态、双向交互、事件驱动、多资源、多响应和会话管理，需要在REST框架内进行适当的建模。为了应对这些挑战，我们提出了三种REST设计模式:会话、事件订阅和使用REST组合的关系。这种方法导致了从CSTA到REST的系统的一对一转换。我们希望这种对具体用例的研究能够有助于更好地理解REST，并导致通信服务与Web基础设施的无缝融合。
{"title":"Design Patterns for RESTful Communication Web Services","authors":"Li Li, W. Chou","doi":"10.1109/ICWS.2010.101","DOIUrl":"https://doi.org/10.1109/ICWS.2010.101","url":null,"abstract":"In recent years, REST (Representational State Transfer) has received much attention for designing scalable web services in various domains. There is an increasing interest on its application to real-time communication web services. Based on a case study of CSTA services, we found that communication services exhibit a combination of complex message exchange and stateful behavior patterns, including multi-states, two-way interaction, event-driven, multi-resources, multi-responses and session management, that need to be modeled properly within the framework of REST. To address these challenges, we propose three REST design patterns: session, event subscription and relationship using REST composition. This approach leads to a systematic one-to-one transformation from CSTA to REST. We hope such a study on a concrete use case can contribute to a better understanding of REST and lead to a seamless convergence of communication services with the infrastructure of the Web.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121791017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We present in this paper a trust-based game theoretical model for Web services collaboration. The devised model is an application of the generic model about tasks allocation for agents, which is presented in [13]. We consider that a collaboration between Web services captures a possible interaction for achieving a specific task. We consider such collaboration as a game in which several Web services compete to win a task by bidding a cost for achieving it. The game winner is the Web service which has the minimal trust-based cost, which is the product of the cost and the inverse of the trust value of the bidding Web service. Initial trust values are computed based on the distance between the actual and the announced quality attribute values of a Web service. These values are computed during a collaboration evaluation period. They are updated after each game round based on a bayesian model. We show in this paper how the use of trust allows a safer collaboration between Web services with respect to collaborations where there is no consideration of the trust as a criteria for allocating tasks.
{"title":"Trust Assessment for Web Services Collaboration","authors":"H. Yahyaoui","doi":"10.1109/ICWS.2010.99","DOIUrl":"https://doi.org/10.1109/ICWS.2010.99","url":null,"abstract":"We present in this paper a trust-based game theoretical model for Web services collaboration. The devised model is an application of the generic model about tasks allocation for agents, which is presented in [13]. We consider that a collaboration between Web services captures a possible interaction for achieving a specific task. We consider such collaboration as a game in which several Web services compete to win a task by bidding a cost for achieving it. The game winner is the Web service which has the minimal trust-based cost, which is the product of the cost and the inverse of the trust value of the bidding Web service. Initial trust values are computed based on the distance between the actual and the announced quality attribute values of a Web service. These values are computed during a collaboration evaluation period. They are updated after each game round based on a bayesian model. We show in this paper how the use of trust allows a safer collaboration between Web services with respect to collaborations where there is no consideration of the trust as a criteria for allocating tasks.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132121853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper proposes a feature-oriented approach for Web services customization that can address three key challenges: reducing complexity, automated validation and dynamic deployment. We exploit techniques from Software Product Line (SPL) domain, particularly feature modeling techniques, to design our framework. Feature modeling allows to abstract variability in consumers’ requirements to simplify customization processes, while automated analysis on feature models helps to validate customizations. The use of feature models at runtime enables dynamic deployment of a business process as a result of a service customization. We propose the use of feature models as service description artifacts to facilitate service customizations. The framework builds on a Model-Driven Development (MDD) approach to automate large parts of its operation.
{"title":"A Feature-Oriented Approach for Web Service Customization","authors":"Tuan-Anh Nguyen, A. Colman","doi":"10.1109/ICWS.2010.64","DOIUrl":"https://doi.org/10.1109/ICWS.2010.64","url":null,"abstract":"This paper proposes a feature-oriented approach for Web services customization that can address three key challenges: reducing complexity, automated validation and dynamic deployment. We exploit techniques from Software Product Line (SPL) domain, particularly feature modeling techniques, to design our framework. Feature modeling allows to abstract variability in consumers’ requirements to simplify customization processes, while automated analysis on feature models helps to validate customizations. The use of feature models at runtime enables dynamic deployment of a business process as a result of a service customization. We propose the use of feature models as service description artifacts to facilitate service customizations. The framework builds on a Model-Driven Development (MDD) approach to automate large parts of its operation.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133515825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Although Service-Oriented principles have been widely adopted by High Throughput Computing infrastructure designers, the integration between SOA and HTC is made difficult by legacy. jGASW is a framework for wrapping legacy scientific applications as Web Services and integrating them into an intensive computing-aware SOA framework. It maps complex I/O data structures to command lines and enables dynamic allocation of computing resources; including execution on local hosts or on grid infrastructures; data transfer management and support of non-functional concerns.
{"title":"jGASW: A Service-Oriented Framework Supporting HTC and Non-functional Concerns","authors":"J. R. Balderrama, J. Montagnat, D. Lingrand","doi":"10.1109/ICWS.2010.59","DOIUrl":"https://doi.org/10.1109/ICWS.2010.59","url":null,"abstract":"Although Service-Oriented principles have been widely adopted by High Throughput Computing infrastructure designers, the integration between SOA and HTC is made difficult by legacy. jGASW is a framework for wrapping legacy scientific applications as Web Services and integrating them into an intensive computing-aware SOA framework. It maps complex I/O data structures to command lines and enables dynamic allocation of computing resources; including execution on local hosts or on grid infrastructures; data transfer management and support of non-functional concerns.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122142637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recently, most enterprises adapt Web services technologies for designing and building complex inter-enterprise business applications. These applications are built by the coordination between set of Web services. Therefore, checking the compatibility between two services to guarantee that they can interact correctly is an important issue. In case of service update or replacement, there is a need for checking the replaceability to ensure that the new service is compatible with all the services which were compatible with the replaced one. These two type of checking are based on the services descriptions. Enriching services descriptions by including their behaviours is becoming more and more important. This behaviour can be described by business protocols representing the possible sequences of message exchanges. Since a lot of Web services use access control policies to restrict the access to authorized consumers, these policies should be a part of the service description. Checking compatibility and replaceability between Web services by analyzing their business protocols after assigning the access control policies is the main contribution of this work. Access control policies will be presented using ontology.
{"title":"Checking Compatibility and Replaceability in Web Services Business Protocols with Access Control","authors":"Emad Elabd, E. Coquery, Mohand-Said Hacid","doi":"10.1109/ICWS.2010.102","DOIUrl":"https://doi.org/10.1109/ICWS.2010.102","url":null,"abstract":"Recently, most enterprises adapt Web services technologies for designing and building complex inter-enterprise business applications. These applications are built by the coordination between set of Web services. Therefore, checking the compatibility between two services to guarantee that they can interact correctly is an important issue. In case of service update or replacement, there is a need for checking the replaceability to ensure that the new service is compatible with all the services which were compatible with the replaced one. These two type of checking are based on the services descriptions. Enriching services descriptions by including their behaviours is becoming more and more important. This behaviour can be described by business protocols representing the possible sequences of message exchanges. Since a lot of Web services use access control policies to restrict the access to authorized consumers, these policies should be a part of the service description. Checking compatibility and replaceability between Web services by analyzing their business protocols after assigning the access control policies is the main contribution of this work. Access control policies will be presented using ontology.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129892118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Given the large amount of existing services and the diversified needs nowadays, it is time-consuming for end-users to find appropriate services. To help end-users obtain their desired services, context-aware systems provide a promising way to automatically search and recommend services using a user’s context. However, existing context-aware techniques have limited support for dynamic adaption to newly added context types (e.g., location, time and activity). Due to the diversity of user’s environment, the available context types may change over time. It is challenging to anticipate a complete set of context types while we design a context aware system. In this paper, we propose a context modeling approach which can dynamically handle various context types and values. More specifically, we use ontologies to enhance the meaning of a user’s context values and automatically indentify the relations among different context values. Based on the relations among context values, we capture the potential services which the user might need. A case study is conducted to evaluate the effectiveness of our approach. The results show that our approach can use contexts to find users’ needs and recommend their desired services with high precision and recall.
{"title":"An Approach for Context-Aware Service Discovery and Recommendation","authors":"Hua Xiao, Ying Zou, J. Ng, L. Nigul","doi":"10.1109/ICWS.2010.95","DOIUrl":"https://doi.org/10.1109/ICWS.2010.95","url":null,"abstract":"Given the large amount of existing services and the diversified needs nowadays, it is time-consuming for end-users to find appropriate services. To help end-users obtain their desired services, context-aware systems provide a promising way to automatically search and recommend services using a user’s context. However, existing context-aware techniques have limited support for dynamic adaption to newly added context types (e.g., location, time and activity). Due to the diversity of user’s environment, the available context types may change over time. It is challenging to anticipate a complete set of context types while we design a context aware system. In this paper, we propose a context modeling approach which can dynamically handle various context types and values. More specifically, we use ontologies to enhance the meaning of a user’s context values and automatically indentify the relations among different context values. Based on the relations among context values, we capture the potential services which the user might need. A case study is conducted to evaluate the effectiveness of our approach. The results show that our approach can use contexts to find users’ needs and recommend their desired services with high precision and recall.","PeriodicalId":170573,"journal":{"name":"2010 IEEE International Conference on Web Services","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128351728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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