RE: Java and Forte

Question

We have no problem using JDK 1.1.5. However, we are using Orbixweb. If
you are accessing the applet and the IOR file from the same host (exact
host name), then one other possibility is the JVM compatibility for your
browser. Using Javasoft's Activator or appletviewer should resolve
that.
-----Original Message-----
From: Kamran Amin [SMTP:[email protected]]
Sent: Tuesday, March 10, 1998 7:48 AM
To: '[email protected]'; '[email protected]'
Subject: RE: Java and Forte
Dan,
We had the same problem as you are having regarding question
one. Make
sure you are
using JDK 1.1.3 or 1.1.4. It did not work for me when I was using JDK
1.1.5. Also you have to
use the gatekeeper to make the applet work. Hope this help.
Kamran Amin
Forte Technical Leader, Software Engineering
[email protected]
203-459-7362
Oxford Health Plans
48 Monroe Turnpike
CT, Trumbull 06611
http://www.oxhp.com/
From: [email protected][SMTP:[email protected]]
Sent: Monday, March 09, 1998 7:49 PM
To: [email protected]
Subject: Re: Java and Forte
1. I have been able to make my Java client appllication call-in to a
Forte service object with success. However the tricky part beginswhen
I try to do the same with a Java applet. I get an exception returned
which is an AppletSecurityException. I understand that running a Java
applet in a browser has two limitations, one being the Java applet
sandbox and the firewall restriction. As I am only running my Java
applet and the Forte service object on the same node, this rules out
the latter.
I have tried running the Gatekeeper from the same directory as myJava
client application, which includes all the client stub files
(including stub files which are generated from Forte supplier plans
such as those in the Framework folder). However, I still receive the
AppletSecurityException.
How can I go about making this operation successful?
**AppletSecurityExceptions can be caused by many problems--trying toaccess
machines other than the class download machine, or trying to accessserver
side classes outside the defined directory structure in the webserver. I'd
look closely at the classes that are being brought into memory (forexample,
Visibroker's ORB shows you each file as it is loaded) and make sureyour web
server is defined correctly. If you follow the Forte technotesclosely, it
usually solves this problem.
2. Has anyone tried implementing a 'fat' client, one that combines a
Forte web application, JavaScript, and a Java applet client toperform
operations such as validation and a tiny bit of data processing allon
the client side, relieveing the application server from such
operations? If yes, how do I implement the solution, and are thereany
tech notes from Forte that specifically tell me how to do this?
**We have created a Java framework that follows many of the designpatterns
and naming conventions as our Forte framework. The Java classes canbe
extended to marshal and unmarshal scalar data structs passed acrossthe ORB
boundary to instantiate 'thick' functional objects on the client, andas much
processing and as many business rules as wanted can be developed inthe
client
Java objects.

Answer 1

If you look at the exception information in the iiop manual it
discusses exteneded propties DefaultThrowsClause, ThrowsClause and
IsThrowable.
If you mark your exception class with IsThrowable it will show up in the
IDL as an exception. If you use either DefaultThrowsClause(project) or
ThrowsClause(method) you will get the appropriate raises in the idl.
This will cause the idl2java to produce code which will allow you to catch
the exception.
Tom.
At 09:41 AM 1/29/99 +0100, Giuseppe Sorce wrote:
>
Hi all,
I am currently working to an architecture to establish a communication
between a Forte' server and a Java client, using Visigenic's Visibroker and
IDL mode.
I have problems when I try to raise a Forte' exception from a method
invoked by the Java client; I would like the exception class
(ProductException) not to inherit from the class GenericException, because
the IDL I want to generate must have this structure:
exception ProductException {
string message;
Using this solution, the client application gets blocked waiting forever.
I am currently working with:
- Forte' 3.0.G.2 plus WebEnterprise 1.0.B
- JDK 1.1.5
- Visibroker 3.1
My question is: is it possible to raise an exception from the Forte' side
that is
compliant to the IDL mentioned above?
Of course it should be caught from the Java side.
Thank you in advance
Giuseppe Sorce
CSI Piemonte - C.so Unione Sovietica 216 - 10134 Torino - ITALY
tel. [phone]
fax [phone]
e-mail [email protected]
url http://www.csi.it
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