Corba Section Index | Page 2
I am converting an application from VisiBroker 3.0 to VisiBroker 4.0. What are the issues that I must address? Where can I get more information about it?
We have recently migrated our project from VBJ 3.4 to VBJ 4.x. There are a variety of issues you would want to address depending on the VBJ features your application uses. You would need to exerci...more
I want to obtain a CORBA object reference from an applet using tnameserv. Does it mean that tnameserv must run in the same server the applet comes from?
If you don't want to request any additional security permissions from browser, then yes.
I am working on Visibroker 4.2 with jdk 1.2.2. I have multiple queries coming as a single CORBA request. While processing the queries if some thing goes wrong and the server crashes, is there any way by which the server can still process the queued requests after restarting?
I think you should look into a message oriented middleware (MOM) product like IBM MQ series. Products like that can recover from a crash with out loosing information and can continue processing qu...more
Do CORBA implementations of different vendors interoperate easily?
The CORBA specification defines Interoperable Object References (IORs), that must be portable between different vendors ORBs. In practice, I have spent a lot of time getting this to work. I trie...more
How can I pass a serializable Java object by value using CORBA? What would the IDL be?
Java serialization and CORBA support for passing objects by value are similar.
So to use CORBA object by value, you have to declare in IDL the full description of your value type:
ValueType MyVal...more
How reliable is the oneway operation in CORBA?
The specification says that oneway calls are not reliable, i.e. a oneway call doesn't guarantee message delivery. The guarantees made are strongly depends on the ORB vendor.
Is it possible call a CORBA object from JavaScript? Is it possible from an applet? How?
Yes, it is possible.
From JavaScript you may call Applet methods, that in turn call the CORBA object.
To call a CORBA object from an Applet, you have to get the IOR of the CORBA object. Then, if t...more
How can I convert Java interfaces to Corba IDL?
VisiBroker includes the java2idl tool.
How to write the IDL if I just want to transport a Java object using CORBA? Both the client and the server are written in Java.
Assuming you want to pass a reference to the Java object and not a copy of it, define an IDL interface to represent the object and implement its interface. Then, you would have an outgoing parame...more
I am attempting to develop connectivity between a CORBA server and a EJB in both directions. Our development platform is VisualAge For Java EE 3.02 and Visibroker. The deployment environment is WebSphere AE 3.02 and Visibroker. When I follow the instructions for the VA IDL development Environment, I must remove the WebSphere Test Environment because of conflicts between the CORBA classes with the Visibroker ORB.
I am attempting to develop connectivity between a CORBA
server and a EJB in both directions. Our development platform is VisualAge
For Java EE 3.02 and Visibroker. The deployment environment is Web...more
I am using VisiBroker 4.5 and JDK 1.3 ORBs, but am not able to have the two talk to each other.
I am using VisiBroker 4.5 and JDK 1.3 ORBs, but am not able to have the two talk to each other. My server uses the VisiBroker POA and registers itself with the VisiBroker "nameserv" namin...more
My CORBA server is down. Now if the CORBA client invokes a method through the name server it (the name server) does not start the CORBA server to fulfill this request.
My CORBA server is down. Now if the CORBA client invokes a method through the
name server it (the name server) does not start the CORBA server to fulfill this request.
How can I achieve this?
Has anyone ever tried to send a file through Java ORB instead of using the ftp protocol?
Has anyone ever tried to send a file through Java ORB instead of using the ftp protocol?
In my experiment it took almost a minite to send a 36Kb size file though ORB. Otherwise, it would taken arou...more
I need a solution for communicating to a COM based Application which has a C++ based API from a CORBA/Java based Server. In brief, when the CORBA/Java server receives requests from a CORBA/Java Applet client, it has to talk to a COM/C++ application, process the request and get back the result to the Java client. How can I accomplish this communication?
I need a solution for communicating to a COM based
Application which has a C++ based API from a
CORBA/Java based Server. In brief, when the CORBA/Java
server receives requests from a CORBA/Java A...more
How does one issue a request on an object that located in different network? We want to use the CORBA Naming Service and do not want to specify the server's IP address.
Most ORB implementations provide some means whereby a hostname in place of a hard IP address can be placed within the IOR. This is usually done to cope with things such as DHCP.
On Iona one of t...more
