Request broker

Request broker This mechanism maintains information about the location of components and delivers requests and responses in a standard way. 

CORBA (Common Object Request Broker Architecture) was designed by the Object Management Group (OMG) to support open distributed communication between objects across a wide variety of platforms and languages. Interestingly, despite the Object in its name, CORBA does not directly expose the notion of object identity it could more properly be considered a distributed component framework. 

CORBA bus The base level of IDL-based interface definitions, the interface and server repositories, and the request broker... 

Other cycles can be horizontal one that does not deliver new user-visible functionality but instead carries a minimal use case through increasingly deep layers of the application and infrastructure components, exercising all communication channels. An example is a single user interaction carried from the user interface through the business object layer via an object request broker (ORB) to the applicable databases and back. 

CORBA] Common Object Request Broker Architecture. See www.omg.oig. 

One of the drawbacks of JADE framework is that it does not support Ml mobility of agents. By default, JADE agents communicate with each other using Java Remote Method Invocation (RMI, [5]) or Common Object Request Broker Architecture (CORBA, [6]). However, a mobile agent can be created and it can travel between hosts within the same agent platform but not between different platforms. Currently, there is a research work on going to enhance JADE to support mobility between different agent platforms. 

The management system relies on the Common Object Request Broker Architecture (CORBA) to deal with the problem of heterogeneity. CORBA is a prominent example of a distribution platform [877]. The CORBA architecture consists of five functional areas [1024] ... 

Object Request Broker (ORB), which is responsible for transparent communication between objects, i.e. clients and servers,... 

It should be noted that different concrete architectures for one logical architecture exist in general. These may reflect a sequence of possibly different interdependent decisions of the above list, or different realization variants. For example, one concrete architecture may be equipped with a RPC and another one with a CORBA (Common Object Request Broker Architecture [877]) implementation of interprocess communication. 

Object Management Group (OMG) Common Object Request Broker Architecture (CORBA) Core Specification, Version 3.0.3 (2004), http //www.omg.org/technology/documents/formal/corba iiop.htm... 

Dynamic business flow management system (DBFMS) invokes Business Service 1, then looks for Business Service 2 through the Global Request Broker. 

Needless to say, there are other ways to exchange data like the Common Object Request Broker Architecture (CORBA) (15). This standard provides an intermediary object-oriented layer that handles access to the data between server and client. Another recently emerging way to exchange data is web services (16), which will be described later. 

Otte, R., Patrick, P., and Roy, M. (1996), Understanding CORBA Common Object Request Broker Architecture, Prentice Hall, Upper Saddle River, NJ. 

The Object Management Group, a consortium of object technology vendors founded in 1989, created a technology specification named CORBA (Common Object Request Broker Architecture). CORBA employs an abstraction similar to that of RPC, with a slight modification that simplifies programming and maintenance and increases extensibility of products. 

The basic service provided by CORBA is delivery of requests from the client to the server and delivery of responses to the client. This service is realized by using a message broker for objects, called object request broker (ORB). An ORB is the central component of CORBA and handles distribution of messages between objects. Using an ORB, client objects can transparently make requests to (and receive responses from) server objects, which may be on the same computer or across a network. 

The software used, COVISE (Rantzau and Lang 1998), is in principle based on a data flow paradigm found in visualization packages. In contrast to most pure data flow packages, COVISE uses the concept of data and function objects (modules) that can be arbitrarily distributed across machines. The data objects are transferred between hosts using special request broker modules (one for each host). A central controller module is responsible for proper synchronization and execution of a module network constructed beforehand in a visual application builder. 

Common object request broker architecture (CORBA), 714, 719-722, 732 Common random numbers (CRN) technique, 2492-2493... 

ANSI american national standards institute B2B business-to-business B2C business-to-consumer CORBA common object request broker architecture... 

DCOM distributed component object model EDI electronic data interchange HTTP hypertext transfer protocol HOP internet inter-orb protocol JVM java virtual machine ORB object request broker SET secure electronic transaction TCP/IP transmission control protocol/in-ternet protocol... 

Object Management Group, 2002, The Common Object Request Broker Architecture and Specification, release 2.6.1. 

The simulation request broker a sort of middleware server written in Java, whose main task is to synchronize concurrent client calls, transfer configuration data from... 

The simulation request broker may be contacted by other Java applications directly using the standard RMI interface shipped with all Java versions. Like this, the web server s servlets communicate with the broker very easily. 

Yourdon and Coad, 1991). It allows to separate model and view in the web client and simplifies the communication between the different components of Hybrex WEB. The whole object model of a rolling mill is implemented as a standalone Java bean. This bean is used by the web client for parameterization of the plant and to read the calculated values for graphical presentation in tables and diagrams. The simulation request broker uses the same object model and extends it by CORBA functionality. 

This agent software takes the same model bean, parameterizes a plant corresponding to the real plant where the MicroStructureMonitor is running and then feeds this model to the simulation request broker. Similar requests can be sent to the server at any time. 

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