Merged gcj-eclipse branch to trunk.

From-SVN: r120621

libjava/classpath/gnu/CORBA/CollocatedOrbs.java

@@ -0,0 +1,164 @@
+/* CollocatedOrbs.java -- Handles collocations
+   Copyright (C) 2006 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. */
+
+
+package gnu.CORBA;
+
+import gnu.CORBA.Poa.gnuServantObject;
+
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+
+import org.omg.CORBA.LocalObject;
+import org.omg.CORBA.portable.Delegate;
+import org.omg.CORBA.portable.ObjectImpl;
+
+/**
+ * This class provides support for the direct method invocations without
+ * involving the network in the case when both ORBs run on the same java
+ * virtual machine. Special attention is only needed when call is made
+ * between two independent ORBs, instantiated via ORB.init. The call to the
+ * object, obtained via IOR reference from the ORB where it was locally
+ * connected is always local anyway.
+ * 
+ * For security reasons it may be sensible to keep this class and all support
+ * package private.
+ * 
+ * @author Audrius Meskauskas
+ */
+class CollocatedOrbs
+{
+  /**
+   * This field is used in automated Classpath specific testing to disable
+   * the direct calls. 
+   */
+  static boolean DIRECT_CALLS_ALLOWED = true;
+  
+   /**
+    * Containts the references of the all running GNU Classpath ORBs in the
+    * local virtual machine. GNU Classpath ORBs register themselves here when
+    * created and unregister when either ORB.destroy is called or in the 
+    * finalizer.
+    */
+   private static ArrayList orbs = new ArrayList();
+   
+   /**
+    * The address of the local host.
+    */
+   static String localHost;
+   
+   static
+    {
+      try
+        {
+          localHost = InetAddress.getLocalHost().getHostAddress();
+        }
+      catch (UnknownHostException ex)
+        {
+          throw new InternalError("Local host is not accessible:" + ex);
+        }
+    }
+   
+   /**
+     * Register the new ORB
+     * 
+     * @param orb the orb to register
+     */
+  static void registerOrb(OrbFunctional orb)
+  {
+    if (DIRECT_CALLS_ALLOWED)
+      synchronized (orbs)
+        {
+          assert ! orbs.contains(orb);
+          orbs.add(orb);
+        }
+  }
+  
+   /**
+     * Unregister the ORB. The ORB will no longer be reacheable locally but may
+     * be reacheable via network as if it would be remote.
+     * 
+     * @param orb the orb to unregister
+     */
+  static void unregisterOrb(OrbFunctional orb)
+  {
+    if (DIRECT_CALLS_ALLOWED)
+      synchronized (orbs)
+        {
+          assert orbs.contains(orb);
+          orbs.remove(orb);
+        }
+  }
+  
+  /**
+   * Search the possibly local object. If the IOR is not local or none of the
+   * found ORBs of this virtual machine knows about it, null is returned.
+   * 
+   * @param ior the IOR to search
+   * @return the found local CORBA object or null in not found.
+   */
+  static org.omg.CORBA.Object searchLocalObject(IOR ior)
+  {
+    if (! DIRECT_CALLS_ALLOWED && ! ior.Internet.host.equals(localHost))
+      return null;
+
+    synchronized (orbs)
+      {
+        OrbFunctional orb;
+        org.omg.CORBA.Object object;
+        for (int i = 0; i < orbs.size(); i++)
+          {
+            orb = (OrbFunctional) orbs.get(i);
+            object = orb.find_connected_object(ior.key, ior.Internet.port);
+            if (object != null)
+              {
+                if (object instanceof SafeForDirectCalls)
+                  {
+                    return object;
+                  }
+                else if (object instanceof gnuServantObject)
+                  {
+                    return object;
+                  }
+              }
+          }
+      }
+    return null;
+  }
+  
+}