Corba Section Index | Page 7
We are using Visibroker for Java 3.4 in our exisiting product. We use osagent and do static binding. We have an immediate need to deploy this application (Stand alone Java application communicating to application server thru CORBA) in Internet.
We are using Visibroker for Java 3.4 in our exisiting product. We use osagent and do static binding. We have an immediate need to deploy this application (Stand alone Java application communicating...more
I am trying to build up a Development environment (using JBuilder) to write Corba Object Implementations, Corba Object Requests and Corba Server Implementations, all in Java. I am using Visibroker 4.0. Please help.
JBuilder 3 Enterprise Edition comes with support for VisiBroker 3 built in.
It understands IDL files, invokes the IDL compiler, will build sample implementations,
includes the VBJ libraries, et...more
I am implementing a CORBA server object in CORBA client side. I wanted to start this CORBA server object from a client program but in a separate JVM. How can I do that?
CORBA's Basic Object Adaptor supports object activation on demand. The client just uses the object
reference and if an object server implementing the object is not running, the BOA
will automatic...more
How can events be filtered?
Often times a consumer is only interested in some of
the events produced by a supplier. For example, consider a stock
portfolio object. It is interested in stock change events for
particular stock...more
What are some other references for event service?
OMG
Event Service Specification
Object Management Group, December 11, 1997.
Asynchronous
Notifications Among Distributed Objects.
By Yeturu Aahlad, Mod Marathe, Bruce Martin and Chung Le. In
Pr...more
What is chaining of event channels? Why chain event channels?
Event channels are themselves suppliers and consumers of events.
As such, they can be chained together.
Consider the following scenario: a supplier supplies events
to multiple nearby consumers an...more
What is pull-style event communication?
In pull-style event communication, the consumer of the
event invokes a pull operation on the supplier. The pull
operation returns the data associated with the event. The
pull operation blocks unti...more
What is push-style event communication?
In push-style event communication, the supplier of the
event invokes a push operation on the consumer. The push
operation takes a single parameter which provides the data associated
with the event.more
What is the format of the data associated with an event?
The data associated with an event are described by a IDL any
type. An any is a self describing structure that can represent
any CORBA data type. Thus, the data type is known at runtime but
not at ...more
What is the supplier-managed policy?
An event channel is a shared resource used by the suppliers
and consumers of the events. This leads to questions of management
of the resource. For example, how is the channel created in the
first...more
What's an event channel?
An event channel is an object implemented by the CORBA Event
Service. An event channel decouples the communication between
suppliers of events and consumers of events. An event channel
implements ...more
Are object references persistent or transient?
Yes. Both persistent and transient object references are supported in CORBA. Transient object references fail to operate once the process creating the object reference terminates. Persistent objec...more
How are object references obtained?
The fundamental mechanism
for obtaining object references in the distributed object system
is as parameters and results of requests. Everything else is built
on top of this. So you can pass an obj...more
What is IIOP?
CORBA 2.0 defines a network protocol, called IIOP (Internet Inter-ORB Protocol), that allows clients using a CORBA product from any vendor to communicate with objects using a CORBA product from an...more
What's a request?
The basic CORBA paradigm is that of a request for
services of a distributed object. Everything else defined by the
OMG is in terms of this basic paradigm.
The services that an object provides are...more
