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Diffstat (limited to 'libjava/classpath/gnu/CORBA/Poa/ForwardedServant.java')
| -rw-r--r-- | libjava/classpath/gnu/CORBA/Poa/ForwardedServant.java | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/CORBA/Poa/ForwardedServant.java b/libjava/classpath/gnu/CORBA/Poa/ForwardedServant.java new file mode 100644 index 000000000..c54a02654 --- /dev/null +++ b/libjava/classpath/gnu/CORBA/Poa/ForwardedServant.java @@ -0,0 +1,209 @@ +/* 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(); + } +} |