Orfali, Robert, Dan Harkey, Jeri Edwards, Instant CORBA, Wiley, New York, 1997, 313 pp.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....from his own repository then, it negotiates with other agents. After constructing program data structure, the agent uses our built converter rules to transform JSP program data structure to pseudo code. We used KQML to communicate with other agents rather than using other languages, e.g. CORBA [18], because we need to adapt the method s formula in our future research to be suitable for any number of variables needed by the caller agents. As the result of this approach, we found that by supplying agent A with only two charts (in the above example, they contain 12 nodes) which is transformed ....

R. Orfali, D. Harkey, and J. Edwards, "instant CORBA," John Wiley & Sons, Inc., 1997.

....interface. These modules are inter operable through a common data format and a data management system for storing, retrieving, and manipulating data. While the data base is accessed by means of the MemCom data management system [30] data are distributed among the modules by a CORBA [24] based data bus which steers and monitors in a heterogeneous network, and by MemCom for tightly coupled HPC applications, MemCom being a proven high performance solution on HPC platforms. 3.1 The MemCom System The MemCom data manager has been developed for numerical simulations like finite ....

....between the JULIUS CORBA architecture and the traditional client server is achieved by introducing an additional controller. In practical terms the MemCom database has been hidden behind a hierarchical setup of classes which can be transferred, in parts or whole, to the requesting CORBA client [24]. Hence, the design is suited for both procedural and object oriented programming. It is to be stressed that CORBA in itself does not provide the means for efficiently implementing the required data structures, and that, in its present form, CORBA is not suited for high speed HPC communication. ....

R. Orfali, D. Harkey, J. Edwards; Instant CORBA, John Wiley & Sons, 1997 (ISBN (471 183334)

....Seamless Integration In ACMAS, the applications do not have to be written around mobile agents. Mobility components are just like any other middleware being used in an application (e.g. network management protocols like SNMP [7] or distributed computing middleware like RMI [8] JINI [9] and CORBA [10]) This is especially important when it is necessary to integrate mobile agent technology with legacy applications. If an application has already been developed using other middleware, it is still possible to enable it to receive and send agents by including the mobility components into it. User ....

R. Orfali, D. Harkey, J. Edwards, and R. Crfali, Instant CORBA: John Wiley & Sons, Inc, 1997.

....reshaping the way people work. As mobile devices become more powerful, users are starting to expect to have access to information in any place they are, by using such devices. 6 To complicate maters, today s Corporate Information Systems (CIS) are being deployed using a three tier architecture [16]. Thus, accessing the databases is no longer enough. It is becoming increasingly important to have mechanisms that allow mobile end devices to access and interact with the business logic present in the middle tier. Mobile agents are a very interesting approach to software development in ....

R. Orfali, D. Harkey, J. Edwards, R. Crfali, "Instant CORBA", John Wiley & Sons Inc., 1997

....This means that adopting a simple client server technology wouldn t solve the problem of integrating these components. After considering various options for developing the Magic Lounge distributed system, it was decided to use the CORBA (Common Object Request Broker Architecture) technology [13, 9]. The use of CORBA satisfies both of the requirements of the Magic Lounge, because: CORBA allows different components of a software system to treat all the other components of the system in the same way, regardless of whether they are local or remote. This means that the various parts of the Magic ....

R. Orfali, D. Harkey, J. Edwards, Instant CORBA, Wiely, 1997.

....in section 4, a discussion on the pros and cons of the implementation concludes the work. 2 Interoperability with CORBA The first step toward the construction of any distributed system in CORBA requires the definition of an interface of methods which will be executed by the target remote objects [13, 11, 10]. In this phase, a text file describing the interfaces in the OMG Interface Definition Language (OMG IDL) must be written. The OMG IDL is an independent declarative programming language, similar in structure to C , that supports the declarations of interfaces, methods, structured and basic types, ....

Orfali, R., Harkey, D., Edwards, J. Instant CORBA. John Wiley & Sons, Inc., 1997.

....adequate support for managing large graphs of objects; companies need to develop or contract such management software [Newman] Many CORBA venders provide adequate dynamic naming services that allow clients to choose which objects to use. Richer trading services should come out at the end of 1997 [OHE2]. 8 Finally, clients will have to be written to make use of these trading services and dynamically bind to them. When Rapid Application Development tools like Visual Basic and Delphi came out, they provided a strong glue for component software. If these components can reside on other servers, ....

Orfali, Robert; Harkey, Dan; and Edwards, Jeri. Instant CORBA. John Wiley and Sons, Inc. New York: 1997.

....reshaping the way people work. As mobile devices become more powerful, users are starting to expect to have access to information in any place they are, by using such devices. To complicate maters, today s Corporate Information Systems (CIS) are being deployed using a three tier architecture [18]. Thus, accessing the databases is no longer enough. It is becoming increasingly important to have mechanisms that allow mobile end devices to access and interact with the business logic present in the middle tier. Mobile agents are a very interesting approach to software development in ....

R.Orfali,D.Harkey,J.Edwards,R.Crfali,"Instant CORBA", John Wiley & Sons Inc., 1997.

....x 4, we provide highlights from the formal analysis of our Z speci cation. We conclude in x 5, where we summarize the lessons learned from our research and discuss related and future work. 2 Background on CORBA 2. 1 OMG s CORBA CORBA systems are based on the Object Management Architecture (OMA) [21, 24], which consists of an object model that describes the properties of all objects, and a reference model that describes how these objects interact. Fig. 2 shows the four di erent types of components distinguished by the OMA: the business 3 Object Request Broker CORBAservices applications ....

....ad hoc diagrams. As a result, the OMG speci cation is ambiguous in many places, and this problem is complicated by the desire to have a speci cation open to all member technologies. We focus here on version 1. 2 of the CORBA security service [20] for more information in general on CORBA consult [19, 21, 24], and [2, 5] for security in particular. 2.2 The CORBA Security Service There are many di erent goals that must be achieved to obtain a secure system, and in this paper we focus on con dentiality and integrity. Together these two goals express that only authorized users can access and modify con ....

R. Orfali, D. Harkey, and J. Edwards. Instant CORBA. Addison-Wesley-Longman, 1998.

.... Corresponding author. Tel. #1 604 822 6932; fax: #1 604 822 5949. E mail address: vleung ece.ubc.ca (V. Leung) which is independent of the computing platforms. Fortunately, the Common Object Request Broker Architecture (CORBA) of the Object Management Group (OMG) provides such a framework [2,9,14,17]. We favor CORBA over Microsoft s Distributed Component Object Model (DCOM) because CORBA is an open standard supported by the majority of the industry and is available on most platforms. To design the UPC system we have selected the Specification and Description Language (SDL) of ITU T [1,10] ....

R. Orfali, D. Harkey, D. Edwards, Instant CORBA, Wiley, New York, 1997.

....x 4, we provide highlights from the formal analysis of our Zspeci cation. We conclude in x 5, where we summarize the lessons learned from our research and discuss related and future work. 2 Background on CORBA 2. 1 OMG s CORBA CORBA systems are based on the Object Management Architecture (OMA) [21, 24], which consists of an object model that describes the properties of all objects, and a reference model that describes how these objects interact. Figure 1 shows the four di erent types of components distinguished by the OMA: the business applications (objects) the services, the facilities, and ....

....object Security service (TCB) Figure 2: Integration of the security service and this problem is complicated by the desire to have a speci cation open to all member technologies. We focus here on version 1. 2 of the CORBA security service [20] for more information in general on CORBA consult [19, 21, 24], and [2, 5] for security in particular. 2.2 The CORBA Security Service There are many di erent goals that must be achieved to obtain a secure system, and in this paper we focus on con dentiality and integrity. Together these two goals express that only authorized users can access and modify ....

R. Orfali, D. Harkey, and J. Edwards. Instant CORBA. Addison-Wesley-Longman, 1998.

....dynamically discover service objects based on the type of service they provide. It is like yellow pages for service objects in a distributed system. A server advertises its service objects with a Trading Service. Clients use the Trading Service to discover service objects that match their needs [11]. This is shown in figure 1 and achieved as follows: 3 1. A server registers (exports) its service objects with the Trading Service. By doing so, a server gives all the relevant information about its service objects to the Trading Service. This service offer includes the service object ....

R. Orfali, D. Harkey and J. Edwards, Instant CORBA. John Wiley & Sons Inc., 1997.

....orchestrate the remote workflow execution. The federated workflow component uses the STST Opentalk framework to send the remoteExecuteProcessWith: and returnRemoteResult: messages across Smalltalk images. 3.4 Data transport By default, Opentalk uses the CORBA 2. 0 pass by reference mechanism [9] between Smalltalk images. Sending messages to objects passed by reference incurs overhead and takes longer since Opentalk transfers the messages to the virtual machine where the object resides. Sometimes applications can t afford this impedance mismatch between local and remote message sends and ....

R. Orfali, D. Harkey, and J. Edwards. Instant CORBA. John Wiley & Sons, 1997.

....environment on any available networked machine, a virtually homogeneous distributed processing environment is required which is independent of the computing platforms. Fortunately, the Common Object Request Broker Architecture (CORBA) of the Object Management Group (OMG) provides such a framework [2, 9, 14, 17]. We favor CORBA over Microsoft s Distributed Component Object Model (DCOM) because CORBA is an open standard supported by the majority of the industry and is available on most platforms. To design the UPC system we have selected the Specification and Description Language (SDL) of ITU T [1, 10] ....

Orfali, R, Harkey, D and Edwards D, Instant CORBA, (John Wiley & Sons Inc., 1997)

....be performed by object or by method basis. Extending this interface is the basis for customized authorization and access control implementations as described in Sections 5 and 6. Client Server Current AccessDecision invoke access allowed get attributes Figure 4. Access decision in invocations [16] 6 Tuomo Lampinen 3.2 The usage of CORBA Security Service Despite the rich set of features offered, many CORBA based distributed applications don t take advantage of the Security Service. The most common reasons for this are the following: Lack of proper Security Service implementation in ....

R. Orfali, D. Harkey, J. Edwards. Instant CORBA, John Wiley & Sons, 1997.

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Orfali, Robert, Dan Harkey, Jeri Edwards, Instant CORBA, Wiley, New York, 1997, 313 pp.

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R. Orfali, D. Harkey, and J. Edwards. Instant CORBA. Wiley, 1997.

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Orfali, R., Harkey, D., and Edwards, J. (1997). Instant CORBA. Wiley.

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R. Orfali, D. Harkey, and J. Edwards, Instant CORBA, John Wiley and Sons, 1997.

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R. Orfali, D. Harkey, and J. Edwards, Instant CORBA, John Wiley and Sons, 1997.

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R.Orfali, D. Harkey, J. Edwards. (1997), Instant CORBA. John Wiley & Sons, Inc. , USA.

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Orfali, Robert, Harkey, Dan, and Edwards, Jeri. 1997. Instant CORBA. New York: John Wiley and Sons.

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Orfali, R., Harkey, D. and Edwards, J. Instant CORBA, (1997)

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R. Orfali, D. Harkey, and J. Edwards, "Instant CORBA," John Wiley & Sons, 1997.

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Orfali, Robert, Dan Harkey, and Jeri Edwards. "Instant CORBA," Wiley, 1997.

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