• Title/Summary/Keyword: Distributed Object System

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Tracing Facility for Visualization system of Distributed Java Object Application

  • Lee, Dong-Woo;R.S. Ramakrishna
    • Proceedings of the Korean Information Science Society Conference
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    • 1999.10c
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    • pp.783-785
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    • 1999
  • Distributed Object Systems are very complex. So, it is difficult to see overall relationship among objects participated in the system. Moreover the performance tuning or maintenance are also important issues of it. So, it needs a way to view the system with low-cost and an efficient method. One of solutions is a visualization tool or system. In this paper, we proposed a tracing facility for Java-based distributed object system, especially RM(Remote Method Invocation). Our up-coming visualization system will use two phase hybrid post-mortem/on-the-fly technique. To support it, the fundamental tracing part must have some flexible and dynamic mechanism. The main idea of our tracing technique is the Plug-in Sensor Model(PSM). The relationship between tracing (monitoring) part and visualization part is closely related. So, we considered the appropriate factors for visualization. We developed 'Traced RMI(TRMI)'. For more precise visualization of a working system, the casuality of events has to be preserved. TRMI can support global event ordering.

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An Abstract Object-Oriented Platform Model for an ATM Switching System

  • Kim, Young-Man;Jung, Boo-Geum;Lee, Eun-Hyang;Lim, Dong-Sun
    • Proceedings of the IEEK Conference
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    • 2000.07b
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    • pp.723-726
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    • 2000
  • In this paper, we present an abstract object-oriented plat-form model .suitable for the real-time distributed telecommunication system. The proposed platform is constructed upon the extended version of the real-time, distributed operating system, SROS(Scalable Real-time Operating System), that is developed at ETRI and successfully operated in the ATM switching system for several years. The object-oriented software development and maintenance methodology will resolve the current software crisis in the area of telecommunication and switching systems due to the everlasting maintenance about the huge amount of the existing software and the ever increasing needs for the better and new communication services. In general, an object-oriented software platform realizes the object-oriented methodology and possesses many good aspects like high productivity, better reusability, easy maintenance, et at. The platform is also designed to present the distributed multimedia service in addition to real-time event delivery. Recently, we have been implementing a couple of prototype bated on the proposed platform. Reflecting the evaluation results from these prototypes, the final platform specification will be determined.

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Development of Management Information System Based on Distributed Object Middleware (분산 객체 미들웨어 기반의 경영정보시스템 개발)

  • Gwon, Yeong-Do;Jo, Yu-Seop
    • 연구논문집
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    • s.28
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    • pp.239-246
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    • 1998
  • Today’s information technology departments face a dilemma to create a competitive advantage for the organization by developing. deploying, and managing distributed applications that scale across the LAN, WAN, and Internet, while preserving investments in systems. Applications, information. IT organizations are today being asked to build the future, without breaking systems that maintain the current business. A possible answer to this dilemma is the implementation of a multi-tier distributed computing architecture. Multi-tier architecture has the potential to provide better, more timely information across the enterprise at a lower cost than the current combination of PC LAN, two-tier client/server, or mainframe applications that have been developed in most organizations. In this paper, we implement management information system based on distributed object middleware using multi-tier distributed computing architecture. This system uses Microsoft's implementation of DCOM/ActiveX and provides easily accessible web interface to the system users.

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A CALS Integrated Database Design Utilizing CORBA (CORBA 기반의 CALS 통합 데이터베이스 설계)

  • 우훈식;정석찬
    • The Journal of Society for e-Business Studies
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    • v.2 no.2
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    • pp.155-169
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    • 1997
  • The CALS integrated database is a key information technology in which CALS implements an information sharing system to enable digital data transfers for technical and non-technical information in distributed and heterogeneous environments. Such heterogeneously distributed CALS information needs to be systematically incorporated so that it can provide a global data view for CALS users. In this paper, we investigated the technologies of CALS integrated database, and proposed a system prototype to implement an integrated data environment (IDE) utilizing distributed object environments CORBA (Common Object Request Broker Architecture).

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On Design and Implementation of Distributed Objects Translation System for Inter-Operability (분산 객체의 호환을 위한 객체 번역 시스템의 설계 및 구현)

  • Kim, Sik
    • The Journal of Information Technology
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    • v.5 no.1
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    • pp.29-37
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    • 2002
  • Distributed programming can be greatly simplified by language support for distributed communication. Many web browsers now offer some form of distributed objects and the number and types of them are growing daily in interesting and innovative ways CORBA IDL and Java RMI, the representative of distributed object model, support different approaches for distributed computing environments. CORBA approach does not support the application generated by java RMI, even though it supports multiple programming languages. Object translation system between RMI to CORBA is designed and implemented for interoperability of distributed objects on the two different distributed programming environments. Suggested system is considered binding, inheritance, polymorphism, object passing, and callback which are key properties on the distributed objects. Translation System we suggested is implemented on the Window/NT(version 4.0) with Java Development Kit(version 1.1.6).

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CORBA 및 DCOM 기반 제어 시스템

  • 박홍성;강원준;김형육;김경식
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.546-546
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    • 2000
  • This paper designs and implements special objects such as a control object, a I/O object and a file object based on CORBA and DCOM which are suitable to distributed control systems. And interactions among those objects ate analyzed.

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Developing Tool of Distributed Application Program Based on Distributed Object Group Framework (분산객체그룹 프레임워크 기반 분산응용 프로그램 개발 도구)

  • Lim Jeong-Taek;Shin Chang-Sun;Joo Su-Chong
    • Journal of Internet Computing and Services
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    • v.6 no.6
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    • pp.71-83
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    • 2005
  • In this paper, we developed the Distributed Programming Developing Tool(DPDT) which can make distributed application program efficiency based on the distributed object group framework supporting group management and dynamic binding for object resources requested from clients on distributed systems. The distributed object group framework we constructed provides not only the group register/withdraw, the access right and the name/property services for server objects from a point of view of group management services, but also dynamic binding, replicated object supporting, load balance, and federation among the object groups from a point of view of the supporting services of distributed application, When developing distributed application, by using our tool, server programming developer implements objects in each server system, next registers the properties to need for service provision to the object group. Client programming developer can also develop client program easily by obtaining the access right for the object or the object group and using the properties of objects with the access right permitted to the client. For providing above application developing environment in this paper. we described the definition of object group, the architecture of the distributed object group framework which our tool supports, and its functionalities, then specified the 3 GUI environments of DPDT implemented for providing efficient interfaces between the distributed object group and distributed applications. Finally, by using the DPDT, we showed the group register/withdraw and the access right grant procedure of objects which are server programs, the developing process of client program, and the executing results of the distributed application developed.

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Suggestion of Healthcare Home Service System Based on Distributed Object Group Framework (분산객체그룹 프레임워크 기반의 헬스케어 홈 서비스 시스템의 제안)

  • Jang Jae-Ho;Jeong Chang-Won;Shin Chang-Sun;Joo Su-Chong
    • The KIPS Transactions:PartD
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    • v.12D no.6 s.102
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    • pp.905-914
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    • 2005
  • This paper suggests a healthcare home service system based on the distributed object group framework that can not only provide healthcare application services using the information obtained from the physical healthcare sensors and devices, and but also monitor and control these services remotely. The distributed object group framework supports the object group service, the interaction service between object groups and the real-time service in order to execute the healthcare application. Here object group means the unit of logical grouped objects or healthcare sensors and devices for a service. Our suggested system consists of 3 layers. The first layer presents the physical sensors and devices for healthcare, as a physical layer. The second layer lays the distributed object group framework, and the third layer, the upper's one, implements healthcare applications based on lower layers. With healthcare applications providing for this system, we implemented the location tracking service, the health information service and the titrating environment service. Also the integrated executing results of these services can be monitored and controlled via remote desktop systems or PDAs.

Applying TMO-Based Object Group Model to Area of Distributed Real-Time Applications and Its Analysis (분산 실시간 응용 분야에 TMO 기반 객체그룹 모델의 적용 및 분석)

  • 신창선;정창원;주수종
    • Journal of KIISE:Computer Systems and Theory
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    • v.31 no.8
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    • pp.432-444
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    • 2004
  • In this paper, we construct the TMO-based object group model on distributed environment, and analyze and evaluate the executability for distributed real-time service of our object group model by developing the distributed real-time application simulator applying the model. The Time-triggered Message-triggered Object(TMO) is a real-time server object having real-time property itself. The TMO-based object group is defined as a set of objects which logically reconfigured the physically distributed one or more TMOs on network by a given distributed application. For supporting group management of the server objects, the TMO-based object group we suggested provides the functions which register and withdraw the solver objects as a group member to an arbitrary object group, and also provides the functions which insert and delete the access rights of server objects from clients. Also, our model was designed and implemented to support the appropriate object selection and dynamic binding service for a single TMO as well as the duplicated TMOs, and to support the real-time scheduling service for the clients which are requesting the service. Finally, we developed the Defence System against Invading Enemy Planes(DSIEP) simulator as a practical example of distributed real-time application by applying our model, and evaluated the adaptability of distributed service strategies for the group components and the executability of real-time services that the TMO-based object group model provides.

Intelligent Multi-Agent Distributed Platform based on Dynamic Object Group Management using Fk-means (Fk means를 이용한 동적객체그룹관리기반 지능형 멀티 에이전트 분산플랫폼)

  • Lee, Jae-wan;Na, Hye-Young;Mateo, Romeo Mark A.
    • Journal of Internet Computing and Services
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    • v.10 no.1
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    • pp.101-110
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    • 2009
  • Multi-agent systems are mostly used to integrate the intelligent and distributed approaches to various systems for effective sharing of resources and dynamic system reconfigurations. Object replication is usually used to implement fault tolerance and solve the problem of unexpected failures to the system. This paper presents the intelligent multi-agent distributed platform based on the dynamic object group management and proposes an object search technique based on the proposed filtered k-means (Fk-means). We propose Fk-means for the search mechanism to find alternative objects in the event of object failures and transparently reconnect client to the object. The filtering range of Fk-means value is set only to include relevant objects within the group to perform the search method efficiently. The simulation result shows that the proposed mechanism provides fast and accurate search for the distributed object groups.

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