Alonso, G., Agrawal, D., El Abbadi, A., Mohan, A., Kamath, M., Guenthoer, R., "Exotica/FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management," Proceedings of IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....model, vendor specific tools can transfer models via a common exchange format. In our work, we extend the underlying metamodel of WPDL by adding events, rules and connectors to its set of modeling constructs. 2.2 Related Workflow Research There are many research efforts in the workflow area. [Alon95] [Ceri97] Sheth97] Stri98] Kim00] Lazc00] In this section, we review the research related to our work. Events and rules have been used in several research projects. An example is the WIDE project [Ceri97] WIDE uses a distributed architecture for workflow management, based on a database ....

Alonso, G., Agrawal, D., El Abbadi, A., Mohan, A., Kamath, M., Guenthoer, R., "Exotica/FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management," Proceedings of IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.

....have been implemented using centralized architectures and in synchronous mode. In synchronous (or request reply) mode a transaction is performed interactively. In general, centralized approaches tend to suffer from scalability and reliability when compared with distributed ones (see for example, [10]) Moreover, the problem with a synchronous mode operation is 3 that the client and server must establish a connection between them, and it is not always possible to have a reliable and fast connection either because the underlying network is unavailable or the server is overloaded. Moreover, ....

Alonso, G., C. Mohan, R. Gunthor, D. Agrawal, et.al., "Exotica/FMQM: A persistent message-based architecture for distributed workflow management," Proceedings of IFIP Working Conference on Information Systems Development for Decentralized Organizations (ISDO '95), Trondheim, Norway, 1-18 (1995).

....and the client provides the interface to the workflow management system and other software tools. On the other hand, in a fully distributed architecture, every node is a fully functional subsystem, and there is no central node that contains all information on the workflow processes in the system [1]. Our proposal of intelligent documents is most suitable for this kind of architecture (see Figure 4) A role in this figure represents a worker who performs a task. For example, a manager is a role denoting a set of tasks that a manager can perform. Examples of other roles are customer, clerk, ....

Alonso, G., Mohan, C., Gunthor, R., Agrawal, D., et.al., "Exotica/FMQM: a persistent message-based architecture for distributed workflow management. Information Systems Development for Decentralized Organizations," Proceedings of IFIP Working Confrence on Information Systems Development for Decentralized Organizations, 1-18 (1995).

....to workflow [11, 12] as this has been the main theme of this paper, and in particular distributed workflow system implementations. It must be noted that most workflow systems to date have been centralized, with a single component responsible for sequencing workflow execution. Exotica=FMQM [13] and WIDE [14] present distributed architectures for workflow enactment based on middleware technologies. Exotica=FMQM is layered on top of a transactional persistent queue system. Each node synchronizes with other nodes by communication over the network of persistent queues. WIDE is distributed ....

G. Alonso, D. Agrawal, A. El Abbadi, C. Mohan, M. Kamath, and R. Guenthoer. "Exotica/FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management". In Proc. IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.

....proceed to examine them and compare them to our approach. A major aspect of our approach is that the Aurora application model assumes autonomous service providers, in contrast to implicitly assuming tight integration and a single authority in charge of management and administration. Exotica=FMQM [8] and WIDE [22] present distributed architectures for workflow enactment based on middleware technologies. The design of Exotica=FMQM is layered on top of a persistent queue system that supports transactional semantics for its queue access API calls. A process model definition is divided into parts ....

G. Alonso, D. Agrawal, A. El Abbadi, C. Mohan, M. Kamath, and R. Guenthoer. "Exotica /FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management ". In Proc. IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.

....rather than having a single scheduling component coordinate execution. This is a departure from the design of current commercial workflow management systems, which centralize scheduling and control. Other research projects investigating decentralized workflow scheduling include Exotica=FMQM [5] and WIDE [10] Each task management component is responsible for executing an activity step of the workflow, which is modeled as a single simple task, involving access to a single resource. Each such component is informed by the workflow scheduler about its activation dependencies, which ....

G. Alonso, D. Agrawal, A. El Abbadi, C. Mohan, M. Kamath, and R. Guenthoer. "Exotica/FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management". In Proc. IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.

....from a single server, which maintains process definitions and state information about currently active process instances in persistent storage. In order to remove this central point, the architecture has to be adapted to support coordination in a distributed fashion. The Exotica=FMQM prototype [4] implements distributed coordination by relying on persistent messages rather than persistent storage. A persistent messaging systems provides each host machine with local queues where applications can place messages to be retrieved by other applications. The messaging system takes care of the ....

G. Alonso, D. Agrawal, A. El Abbadi, C. Mohan, M. Kamath, and R. Guenthoer. "Exotica /FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management ". In Proc. IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.

....software (the many existing applications) The only component missing is the necessary glue to make a coherent whole out of many autonomous, heterogeneous building blocks running over distributed, loosely coupled systems. Federated database systems [47] TP monitors [26, 45] persistent queuing [6, 43], standards like CORBA [46] process centered software engineering [33] and workflow management systems [31] are among the best known examples. The functionality needed in such environments can be roughly divided in four obvious categories: interface definition, communication, execution ....

....all the information relevant to the execution of the process so as to allow navigation to take place by consulting WFMS: the Next Generation of Distributed Processing Tools 17 the data in the information carrier. A similar approach is followed by EXOTICA FMQM, FlowMark on Message Queue Manager [6]. In Exotica FMQM, each node functions independently, the only interaction between nodes being through persistent messages used to trigger the next step in the execution. The basic idea is to partition the process definition into independent subsets that are distributed to the nodes were execution ....

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G. Alonso, D. Agrawal, A. El Abbadi, C. Mohan, R. Gunthor, M. Kamath. "Exotica/FMQM: A Persistent Message-Based Architecture for Distributed Workflow Managemen", Proceedings of the IFIP WG8.1 Working Conference on Information Systems Development for Decentralized Organizations. Trondheim, Norway, August, 1995.

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Alonso, G., C. Mohan, R. Gunthor, D. Agrawal, et.al., "Exotica/FMQM: A persistent message-based architecture for distributed workflow management," Proceedings of IFIP Working Conference on Information Systems Development for Decentralized Organizations (ISDO '95), Trondheim, Norway, 1-18 (1995).

No context found.

G. Alonso, D. Agrawal, A. El Abbadi, C. Mohan, M. Kamath, and R. Guenthoer. "Exotica/FMQM: A Persistent Message-Based Architecture for Distributed Workflow Management". In Proc. IFIP Working Conference on Information Systems Development for Decentralized Organizations, 1995.

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