Interface ORBInitializer

All Superinterfaces:
IDLEntity, Object, ORBInitializerOperations, Serializable

public interface ORBInitializer
extends ORBInitializerOperations, Object, IDLEntity

Registers the interceptor. Direct interceptor registration would open a security hole. Hence instead the interceptors from the ORB.init(..) method, passing the names of the needed initialized classes via properties.

These property names are of the form

org.omg.PortableInterceptor.ORBInitializerClass.<Service> where <Service> is the string name of a class, which implements ORBInitializer. During ORB.init(..), the properties begining with org.omg.PortableInterceptor.ORBInitializerClass are collected, the <Service> portion of each property is extracted, the initialiser is instantiated with the <Service> string as its class name and then pre_init and post_init (defined in ORBInitializerOperations) are called on that initializer. The runtime exceptions, thrown by these two methods, are ignored.


A client-side logging service may have the following ORBInitializer implementation:
 package gnu.x.logging;

 import org.omg.PortableInterceptor.*;
 import org.omg.CORBA.LocalObject;

 public class LoggingService extends LocalObject implements ORBInitializer
   public void pre_init (ORBInitInfo info)
       // More than one interceptor can be registered.
       ServerRequestInterceptor log_requests = new rLoggingInterceptor();

       IORInterceptor log_iors = new iLoggingInterceptor();

   public void post_init (ORBInitInfo info)
       // Unused.

Then, one of the used set of properties then must contain the property, named org.omg.PortableInterceptor.ORBInitializerClass.gnu.x.Logging.LoggingService . The value of the property is ignored and may empty string. The agreed locations, where this property will be searched for, are:

1. The properties parameter in the ORB.init(..), if any.
2. The System properties.
3. The file located in the user.home directory (if any).
4. The file located in the java.home/lib directory (if any).

The applet parameters and command line arguments are not scanned for the possible initializers.

Interceptors are registered on a per-ORB basis. The virtual per-object Interceptors can be simulated by checking the policies on the target from within the interception points to determine whether they should work. The virtual per-POA Interceptors can be obtained instantiating each POA such with a different ORB.

The registration code should not call directly any methods on the ORB being registered.

The new interceptors cannot be registered after the ORB.init(..) returns.

Methods inherited from interface org.omg.CORBA.Object

_create_request, _create_request, _duplicate, _get_domain_managers, _get_interface_def, _get_policy, _hash, _is_a, _is_equivalent, _non_existent, _release, _request, _set_policy_override

Methods inherited from interface org.omg.PortableInterceptor.ORBInitializerOperations

post_init, pre_init -- Copyright (C) 2005 Free Software Foundation, Inc. This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.