| /* ForwardedServant.java -- |
| 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. */ |
| |
| |
| package gnu.CORBA.Poa; |
| |
| import gnu.CORBA.IOR; |
| import gnu.CORBA.IorDelegate; |
| import gnu.CORBA.IorObject; |
| import gnu.CORBA.Minor; |
| |
| import org.omg.CORBA.BAD_PARAM; |
| import org.omg.CORBA.CompletionStatus; |
| import org.omg.CORBA.MARSHAL; |
| import org.omg.CORBA.ORB; |
| import org.omg.CORBA.SystemException; |
| import org.omg.CORBA.portable.ApplicationException; |
| import org.omg.CORBA.portable.Delegate; |
| import org.omg.CORBA.portable.InputStream; |
| import org.omg.CORBA.portable.InvokeHandler; |
| import org.omg.CORBA.portable.ObjectImpl; |
| import org.omg.CORBA.portable.OutputStream; |
| import org.omg.CORBA.portable.RemarshalException; |
| import org.omg.CORBA.portable.ResponseHandler; |
| import org.omg.PortableServer.POA; |
| import org.omg.PortableServer.Servant; |
| |
| import java.io.IOException; |
| |
| /** |
| * A "virtual servant", delegating all invocation to the wrapped |
| * object (usually remote). Used in cases when it is necessary to |
| * handle the request forwarding. |
| * |
| * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org) |
| */ |
| public class ForwardedServant |
| extends Servant |
| implements InvokeHandler |
| { |
| /** |
| * The reference object, handling requests. |
| */ |
| public final ObjectImpl ref; |
| |
| /** |
| * Create an instance, forwarding requests to the given object. |
| */ |
| ForwardedServant(ObjectImpl a_ref) |
| { |
| ref = a_ref; |
| } |
| |
| /** |
| * Create an instance of the forwarded servant. |
| * |
| * @param a_ref a reference where request should be forwarded. |
| * |
| * @return a created forwarded servant or null if the parameter |
| * forwards request to itself. Returning null will force to find |
| * a right servant in one of many possible ways, depending on |
| * policies. |
| */ |
| public static Servant create(org.omg.CORBA.Object a_ref) |
| { |
| try |
| { |
| ObjectImpl fto = (ObjectImpl) a_ref; |
| |
| // Check maybe the remote side forwarded back to our local object. |
| if (fto instanceof IorObject) |
| { |
| IorObject iref = (IorObject) fto; |
| |
| // Check maybe the IOR is local. |
| ORB t_orb = iref._orb(); |
| if (t_orb instanceof ORB_1_4) |
| { |
| ORB_1_4 orb = (ORB_1_4) t_orb; |
| Delegate d = iref._get_delegate(); |
| if (d instanceof IorDelegate) |
| { |
| IorDelegate ird = (IorDelegate) iref._get_delegate(); |
| IOR ior = ird.getIor(); |
| if (orb.LOCAL_HOST.equalsIgnoreCase(ior.Internet.host)) |
| { |
| AOM.Obj rx = orb.rootPOA.findIorKey(ior.key); |
| if (rx != null) |
| { |
| if (rx.object == fto || |
| rx.object._is_equivalent(fto) |
| ) |
| return rx.primary_servant; |
| else |
| fto = (ObjectImpl) rx.object; |
| } |
| } |
| } |
| } |
| } |
| return new ForwardedServant(fto); |
| } |
| catch (ClassCastException ex) |
| { |
| throw new BAD_PARAM("ObjectImpl required but " + a_ref + " passed ", |
| 0x5005, CompletionStatus.COMPLETED_NO |
| ); |
| } |
| } |
| |
| /** |
| * Forward the call to the wrapped object. |
| */ |
| public OutputStream _invoke(String method, InputStream input, |
| ResponseHandler handler |
| ) |
| throws SystemException |
| { |
| org.omg.CORBA.portable.InputStream in = null; |
| org.omg.CORBA.portable.OutputStream out = null; |
| try |
| { |
| try |
| { |
| out = ref._request(method, true); |
| |
| // Transfer request information. |
| int b; |
| while ((b = input.read()) >= 0) |
| { |
| out.write(b); |
| } |
| in = ref._invoke(out); |
| |
| // Read the returned data. |
| out = handler.createReply(); |
| while ((b = in.read()) >= 0) |
| { |
| out.write(b); |
| } |
| } |
| catch (IOException io_ex) |
| { |
| MARSHAL m = new MARSHAL(); |
| m.minor = Minor.Forwarding; |
| m.initCause(io_ex); |
| throw m; |
| } |
| } |
| catch (ApplicationException ex) |
| { |
| in = ex.getInputStream(); |
| |
| String _id = ex.getId(); |
| throw new MARSHAL(_id, 5101, CompletionStatus.COMPLETED_NO); |
| } |
| catch (RemarshalException remarsh) |
| { |
| _invoke(method, input, handler); |
| } |
| finally |
| { |
| ref._releaseReply(in); |
| } |
| return out; |
| } |
| |
| /** |
| * Delegates to the wrapped object. |
| */ |
| public String[] _all_interfaces(POA poa, byte[] key) |
| { |
| return ref._ids(); |
| } |
| } |