jdk8-mips64-public/corba: src/share/classes/javax/rmi/PortableRemoteObject.java@6845b95cba6b (annotated)

src/share/classes/javax/rmi/PortableRemoteObject.java@6845b95cba6b (annotated)

src/share/classes/javax/rmi/PortableRemoteObject.java

Thu, 31 Aug 2017 18:10:36 +0800

author: aoqi
date: Thu, 31 Aug 2017 18:10:36 +0800
changeset 748: 6845b95cba6b
parent 553: 5ca1b4c282b8
parent 0: 7ef37b2cdcad
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code 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
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 /*
  * Licensed Materials - Property of IBM
  * RMI-IIOP v1.0
  * Copyright IBM Corp. 1998 1999  All Rights Reserved
  *
  */
 package javax.rmi;
 import java.lang.reflect.Method ;
 import org.omg.CORBA.INITIALIZE;
 import javax.rmi.CORBA.Util;
 import java.rmi.RemoteException;
 import java.rmi.NoSuchObjectException;
 import java.rmi.Remote;
 import java.io.File;
 import java.io.FileInputStream;
 import java.util.Properties;
 import java.net.MalformedURLException ;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import java.rmi.server.RMIClassLoader;
 import com.sun.corba.se.impl.orbutil.GetPropertyAction;
 /**
  * Server implementation objects may either inherit from
  * javax.rmi.PortableRemoteObject or they may implement a remote interface
  * and then use the exportObject method to register themselves as a server object.
  * The toStub method takes a server implementation and returns a stub that
  * can be used to access that server object.
  * The connect method makes a Remote object ready for remote communication.
  * The unexportObject method is used to deregister a server object, allowing it to become
  * available for garbage collection.
  * The narrow method takes an object reference or abstract interface type and
  * attempts to narrow it to conform to
  * the given interface. If the operation is successful the result will be an
  * object of the specified type, otherwise an exception will be thrown.
  */
 public class PortableRemoteObject {
     private static final javax.rmi.CORBA.PortableRemoteObjectDelegate proDelegate;
     private static final String PortableRemoteObjectClassKey =
             "javax.rmi.CORBA.PortableRemoteObjectClass";
     static {
         proDelegate = (javax.rmi.CORBA.PortableRemoteObjectDelegate)
             createDelegate(PortableRemoteObjectClassKey);
     }
     /**
      * Initializes the object by calling <code>exportObject(this)</code>.
      * @exception RemoteException if export fails.
      */
     protected PortableRemoteObject() throws RemoteException {
         if (proDelegate != null) {
             PortableRemoteObject.exportObject((Remote)this);
         }
     }
     /**
      * Makes a server object ready to receive remote calls. Note
      * that subclasses of PortableRemoteObject do not need to call this
      * method, as it is called by the constructor.
      * @param obj the server object to export.
      * @exception RemoteException if export fails.
      */
     public static void exportObject(Remote obj)
         throws RemoteException {
         // Let the delegate do everything, including error handling.
         if (proDelegate != null) {
             proDelegate.exportObject(obj);
         }
     }
     /**
      * Returns a stub for the given server object.
      * @param obj the server object for which a stub is required. Must either be a subclass
      * of PortableRemoteObject or have been previously the target of a call to
      * {@link #exportObject}.
      * @return the most derived stub for the object.
      * @exception NoSuchObjectException if a stub cannot be located for the given server object.
      */
     public static Remote toStub (Remote obj)
         throws NoSuchObjectException {
         if (proDelegate != null) {
             return proDelegate.toStub(obj);
         }
         return null;
     }
     /**
      * Deregisters a server object from the runtime, allowing the object to become
      * available for garbage collection.
      * @param obj the object to unexport.
      * @exception NoSuchObjectException if the remote object is not
      * currently exported.
      */
     public static void unexportObject(Remote obj)
         throws NoSuchObjectException {
         if (proDelegate != null) {
             proDelegate.unexportObject(obj);
         }
     }
     /**
      * Checks to ensure that an object of a remote or abstract interface type
      * can be cast to a desired type.
      * @param narrowFrom the object to check.
      * @param narrowTo the desired type.
      * @return an object which can be cast to the desired type.
      * @throws ClassCastException if narrowFrom cannot be cast to narrowTo.
      */
     public static java.lang.Object narrow ( java.lang.Object narrowFrom,
                                             java.lang.Class narrowTo)
         throws ClassCastException {
         if (proDelegate != null) {
             return proDelegate.narrow(narrowFrom, narrowTo);
         }
         return null;
     }
     /**
      * Makes a Remote object ready for remote communication. This normally
      * happens implicitly when the object is sent or received as an argument
      * on a remote method call, but in some circumstances it is useful to
      * perform this action by making an explicit call.  See the
      * {@link javax.rmi.CORBA.Stub#connect} method for more information.
      * @param target the object to connect.
      * @param source a previously connected object.
      * @throws RemoteException if <code>source</code> is not connected
      * or if <code>target</code> is already connected to a different ORB than
      * <code>source</code>.
      */
     public static void connect (Remote target, Remote source)
         throws RemoteException {
         if (proDelegate != null) {
             proDelegate.connect(target, source);
         }
     }
     // Same code as in javax.rmi.CORBA.Util. Can not be shared because they
     // are in different packages and the visibility needs to be package for
     // security reasons. If you know a better solution how to share this code
     // then remove it from here.
     private static Object createDelegate(String classKey) {
         String className = (String)
             AccessController.doPrivileged(new GetPropertyAction(classKey));
         if (className == null) {
             Properties props = getORBPropertiesFile();
             if (props != null) {
                 className = props.getProperty(classKey);
             }
         }
         if (className == null) {
             return new com.sun.corba.se.impl.javax.rmi.PortableRemoteObject();
         }
         try {
             return (Object) loadDelegateClass(className).newInstance();
         } catch (ClassNotFoundException ex) {
             INITIALIZE exc = new INITIALIZE( "Cannot instantiate " + className);
             exc.initCause( ex ) ;
             throw exc ;
         } catch (Exception ex) {
             INITIALIZE exc = new INITIALIZE( "Error while instantiating" + className);
             exc.initCause( ex ) ;
             throw exc ;
         }
     }
     private static Class loadDelegateClass( String className )  throws ClassNotFoundException
     {
         try {
             ClassLoader loader = Thread.currentThread().getContextClassLoader();
             return Class.forName(className, false, loader);
         } catch (ClassNotFoundException e) {
             // ignore, then try RMIClassLoader
         }
         try {
             return RMIClassLoader.loadClass(className);
         } catch (MalformedURLException e) {
             String msg = "Could not load " + className + ": " + e.toString();
             ClassNotFoundException exc = new ClassNotFoundException( msg ) ;
             throw exc ;
         }
     }
     /**
      * Load the orb.properties file.
      */
     private static Properties getORBPropertiesFile () {
         return (Properties) AccessController.doPrivileged(new GetORBPropertiesFileAction());
     }
 }
 class GetORBPropertiesFileAction implements PrivilegedAction {
     private boolean debug = false ;
     public GetORBPropertiesFileAction () {
     }
     private String getSystemProperty(final String name) {
         // This will not throw a SecurityException because this
         // class was loaded from rt.jar using the bootstrap classloader.
         String propValue = (String) AccessController.doPrivileged(
             new PrivilegedAction() {
                 public java.lang.Object run() {
                     return System.getProperty(name);
                 }
             }
         );
         return propValue;
     }
     private void getPropertiesFromFile( Properties props, String fileName )
     {
         try {
             File file = new File( fileName ) ;
             if (!file.exists())
                 return ;
             FileInputStream in = new FileInputStream( file ) ;
             try {
                 props.load( in ) ;
             } finally {
                 in.close() ;
             }
         } catch (Exception exc) {
             if (debug)
                 System.out.println( "ORB properties file " + fileName +
                     " not found: " + exc) ;
         }
     }
     public Object run()
     {
         Properties defaults = new Properties() ;
         String javaHome = getSystemProperty( "java.home" ) ;
         String fileName = javaHome + File.separator + "lib" + File.separator +
             "orb.properties" ;
         getPropertiesFromFile( defaults, fileName ) ;
         Properties results = new Properties( defaults ) ;
         String userHome = getSystemProperty( "user.home" ) ;
         fileName = userHome + File.separator + "orb.properties" ;
         getPropertiesFromFile( results, fileName ) ;
         return results ;
     }
 }

Mercurial > jdk8-mips64-public > corba / annotate

src/share/classes/javax/rmi/PortableRemoteObject.java@6845b95cba6b (annotated)

src/share/classes/javax/rmi/PortableRemoteObject.java