package org.omg.PortableInterceptor;
/**
* org/omg/PortableInterceptor/ORBInitializerOperations.java .
* Generated by the IDL-to-Java compiler (portable), version "3.2"
* from ../../../../src/share/classes/org/omg/PortableInterceptor/Interceptors.idl
* Tuesday, June 10, 2008 1:33:21 AM GMT-08:00
*/
/**
* Facilitates interceptor registration and ORB initialization.
* <p>
* Interceptors are intended to be a means by which ORB services gain
* access to ORB processing, effectively becoming part of the ORB.
* Since Interceptors are part of the ORB, when <code>ORB.init</code>
* returns an ORB, the Interceptors shall have been registered.
* Interceptors cannot be registered on an ORB after it has been
* returned by a call to <code>ORB.init</code>.
* <p>
* An Interceptor is registered by registering an associated
* <code>ORBInitializer</code> object which implements the
* <code>ORBInitializer</code> interface. When an ORB is initializing,
* it shall call each registered <code>ORBInitializer</code>, passing it
* an <code>ORBInitInfo</code> object which is used to register its
* Interceptor.
* <p>
* <b>Registering ORB Initializers in Java</b>
* <p>
* ORBInitializers are registered via Java ORB properties.
* <p>
* The property names are of the form:
* <blockquote><code>
* org.omg.PortableInterceptor.ORBInitializerClass.<Service>
* </code></blockquote>
* where <code><Service></code> is the string name of a class
* which implements
* <blockquote><code>
* org.omg.PortableInterceptor.ORBInitializer
* </code></blockquote>
* To avoid name collisions, the reverse DNS name convention should be
* used. For example, if company X has three initializers, it could define
* the following properties:
* <ul>
* <li><code>
* org.omg.PortableInterceptor.ORBInitializerClass.com.x.Init1
* </code></li>
* <li><code>
* org.omg.PortableInterceptor.ORBInitializerClass.com.x.Init2
* </code></li>
* <li><code>
* org.omg.PortableInterceptor.ORBInitializerClass.com.x.Init3
* </code></li>
* </ul>
* During ORB.init, these ORB properties which begin with
* <code>org.omg.PortableInterceptor.ORBInitializerClass</code> shall be
* collected, the <code><Service></code> portion of each property
* shall be extracted, an object shall be instantiated with the
* <code><Service></code> string as its class name, and the
* <code>pre_init</code> and <code>post_init</code> methods shall be
* called on that object. If there are any exceptions, the ORB shall
* ignore them and proceed.
* <p>
* <b><i>Example</i></b>
* <p>
* A client-side logging service written by company X, for example, may
* have the following ORBInitializer implementation:
* <code><pre>
* package com.x.logging;
*
* import org.omg.PortableInterceptor.Interceptor;
* import org.omg.PortableInterceptor.ORBInitializer;
* import org.omg.PortableInterceptor.ORBInitInfo;
*
* public class LoggingService implements ORBInitializer {
* void pre_init( ORBInitInfo info ) {
* // Instantiate the Logging Service s Interceptor.
* Interceptor interceptor = new LoggingInterceptor();
*
* // Register the Logging Service s Interceptor.
* info.add_client_request_interceptor( interceptor );
* }
*
* void post_init( ORBInitInfo info ) {
* // This service does not need two init points.
* }
* }
* </pre></code>
* To run a program called <code>MyApp</code> using this logging
* service, the user could type:
* <blockquote><code>
* java
*-Dorg.omg.PortableInterceptor.ORBInitializerClass.com.x.Logging.LoggingService
* MyApp
* </code></blockquote>
* <p>
* <b>Notes about Registering Interceptors</b>
* <p>
* Request Interceptors are registered on a per-ORB basis.
* <p>
* To achieve virtual per-object Interceptors, query the policies on the
* target from within the interception points to determine whether they
* should do any work.
* <p>
* To achieve virtual per-POA Interceptors, instantiate each POA with a
* different ORB. While Interceptors may be ordered administratively,
* there is no concept of order with respect to the registration of
* Interceptors. Request Interceptors are concerned with service contexts.
* Service contexts have no order, so there is no purpose for request
* Interceptors to have an order. IOR Interceptors are concerned with
* tagged components. Tagged components also have no order, so there
* is no purpose for IOR Interceptors to have an order.
* <p>
* Registration code should avoid using the ORB (i.e., calling
* <code>ORB.init</code> with the provided <code>orb_id</code>). Since
* registration occurs during ORB initialization, results of invocations
* on this ORB while it is in this state are undefined.
*
* @see ORBInitInfo
*/
public interface ORBInitializerOperations
{
/**
* Called during ORB initialization. If it is expected that initial
* services registered by an interceptor will be used by other
* interceptors, then those initial services shall be registered at
* this point via calls to
* <code>ORBInitInfo.register_initial_reference</code>.
*
* @param info provides initialization attributes and operations by
* which Interceptors can be registered.
*/
void pre_init (org.omg.PortableInterceptor.ORBInitInfo info);
/**
* Called during ORB initialization. If a service must resolve initial
* references as part of its initialization, it can assume that all
* initial references will be available at this point.
* <p>
* Calling the <code>post_init</code> operations is not the final
* task of ORB initialization. The final task, following the
* <code>post_init</code> calls, is attaching the lists of registered
* interceptors to the ORB. Therefore, the ORB does not contain the
* interceptors during calls to <code>post_init</code>. If an
* ORB-mediated call is made from within <code>post_init</code>, no
* request interceptors will be invoked on that call.
* Likewise, if an operation is performed which causes an IOR to be
* created, no IOR interceptors will be invoked.
*
* @param info provides initialization attributes and
* operations by which Interceptors can be registered.
*/
void post_init (org.omg.PortableInterceptor.ORBInitInfo info);
} // interface ORBInitializerOperations
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