In the html\classes subdirectory of your EAServer installation, create a new directory called TutorialApps if it does not exist. In this directory, create the Java file below as JAConsole.java.
This is a simple command-line application that:
Connects to EAServer.
Creates an authenticated session. Edit the user name and password in the source code if your server is configured to validate passwords and role memberships. By default, authentication and role checking are disabled in the server.
Creates a proxy for the component.
Calls the component multiply method.
You can find a copy of JAConsole.java in the html/docs/tutorial/java-corba subdirectory of your EAServer installation. Here is the source for JAConsole.java:
//
// This is a sample command-line Java application that
// invokes the JavaArithmetic component created in the EAServer
// Java component tutorial.
//
// Usage:
// arith iiop://<host>:<port>
//
// Where:
//
// <host> is the host name or IP address of the server machine.
//
// <iiop-port> is the server's IIOP port (9000 in the
// default configuration).
//
//
package TutorialApps;
import org.omg.CORBA.*;
import SessionManager.*;
import Tutorial.*; // Package for EAServer stub classes
public class JAConsole {
static public void main(String options[]) {
String _usage = "Usage: JAConsole iiop://<host>:<port>\n";
String _ior = null;
try {
if (options.length >= 1)
{
_ior = options[0];
}
else
{
System.out.println(_usage);
return;
}
//
// Initialize the CORBA client-side ORB and
// obtain a stub for the EAServer component instance.
//
System.out.println("... Creating session.");
//
// Initialize the ORB.
//
java.util.Properties props = new java.util.Properties();
props.put("org.omg.CORBA.ORBClass", "com.sybase.CORBA.ORB");
ORB orb = ORB.init(options, props);
//
// Create an instance of the EAServer SessionManager::Manager
// CORBA IDL object.
//
Manager manager = ManagerHelper.narrow(orb.string_to_object(_ior));
//
// Create an authenticated session with user "Guest" and password
// "GuestPassword".
//
Session session = manager.createSession("Guest", "GuestPassword");
System.out.println("... Creating component instance.");
//
// Create a stub object instance for the
// Tutorial/JavaArithmetic EAServer component.
//
Tutorial.JavaArithmetic comp =
Tutorial.JavaArithmeticHelper.narrow(
session.create("Tutorial/JavaArithmetic"));
if (comp == null)
{
System.out.print("ERROR: Null component instance. ");
System.out.print(
"Check Jaguar Manager and verify that the component ");
System.out.print(
"Tutorial/JavaArithmetic exists and that it implements the ");
System.out.println(
"Tutorial::JavaArithmetic IDL interface.");
return;
}
System.out.println("... Created component instance.");
//
// Invoke the multiply method.
//
System.out.println("... Multiplying:\n");
double m1 = 3.1;
double m2 = 2.5;
double result = comp.multiply(m1, m2);
System.out.println(" " + m1 + "*" + m2 + "=" + result);
// Explicitly catch exceptions that can occur due to user error,
// and print a generic error message for any other CORBA system
// exception.
} catch ( org.omg.CORBA.COMM_FAILURE cfe)
{
// The server is not running, or the specified URL is
// wrong.
System.out.println(
"Error: could not connect to server at " + _ior + "\n"
+ "Make sure the specified address is correct and the "
+ "server is running.\n\n" + _usage );
} catch ( org.omg.CORBA.OBJECT_NOT_EXIST cone )
{
// Requested object (component) does not exist.
System.out.println(
"Error: CORBA OBJECT_NOT_EXIST exception. Check the "
+ "server log file for more information. Also verify "
+ "that the Tutorial/JavaArithmetic "
+ "component has been created properly in "
+ "Jaguar Manager. \n");
} catch (org.omg.CORBA.NO_PERMISSION npe) {
// Login failed, or the component requires an authorization role
// that this user is not a member of.
System.out.println(
"Error: CORBA NO_PERMISSION exception. Check whether "
+ "login authentication is enabled for your server and "
+ "whether the component has restricted access.\n");
npe.printStackTrace();
} catch (org.omg.CORBA.SystemException se)
{
// Generic CORBA exception
System.out.println(
"Received CORBA system exception: "
+ se.toString() );
se.printStackTrace();
}
return;
} // main()
}
Compile the application source using a JDK 1.3 or later compiler, for example:
%JAGUAR%\bin\jc JAConsole.java
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