Web Services Workflows—Composition, Co-Ordination, and Transactions in Service-Oriented Computing

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	Web Services Workflows—Composition, Co-Ordination, and Transactions in Service-Oriented Computing
	Schahram Dustdar
	2004
发表期刊	Concurrent Engineering
卷号	12 期号:3 页码:237-245
收录类别	其他
合作性质	其它
其他摘要	Web services can be seen as a newly emerging research area for Service-oriented Computing and their implementation in Service-oriented Architectures. Web services are self-contained, self-describing modular applications or components providing services. Web services may be dynamically aggregated, composed, and enacted as Web services Workflows. This requires frameworks and interaction protocols for their co-ordination and transaction support. In a Service-oriented Computing setting, transactions are more complex, involve multiple parties (roles), span many organizations, and may be long-running, consisting of a highly decentralized service partner and performed by autonomous entities. A Service-oriented Transaction Model has to provide comprehensive support for long-running propositions including negotiations, conversations, commitments, contracts, tracking, payments, and exception handling. Current transaction models and mechanisms including their protocols and primitives do not sufficiently cater for quality-aware and long running transactions comprising loosely-coupled (federated) service partners and resources. Web services transactions require co-ordination behavior provided by a traditional transaction mechanism to control the operations and outcome of an application. Furthermore, Web services transactions require the capability to handle the co-ordination of processing outcomes or results from multiple services in a more flexible manner. This requires more relaxed forms of transactions—those that do not strictly have to abide by the ACID properties—such as loosely-coupled collaboration and workflows. Furthermore, there is a need to group Web services into applications that require some form of correlation, but do not necessarily require transactional behavior. The purpose of this paper is to provide a state-of-the-art review and overview of some proposed standards surrounding Web services composition, co-ordination, and transaction. In particular the Business Process Execution Language for Web services (BPEL4WS), its co-ordination, and transaction frameworks (WS-Co-ordination and WS-Transaction) are discussed.
关键词	Web Services Workflows Composition Co-ordination Transactions Middleware
语种	英语
内容类型	期刊论文
URI标识	http://ir.iscas.ac.cn/handle/311060/1363
专题	中国科学院软件研究所
推荐引用方式 GB/T 7714	Schahram Dustdar. Web Services Workflows—Composition, Co-Ordination, and Transactions in Service-Oriented Computing[J]. Concurrent Engineering,2004,12(3):237-245.
APA	Schahram Dustdar.(2004).Web Services Workflows—Composition, Co-Ordination, and Transactions in Service-Oriented Computing.Concurrent Engineering,12(3),237-245.
MLA	Schahram Dustdar."Web Services Workflows—Composition, Co-Ordination, and Transactions in Service-Oriented Computing".Concurrent Engineering 12.3(2004):237-245.

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