001: /**
002: * JOnAS: Java(TM) Open Application Server
003: * Copyright (C) 2004-2005 Bull S.A.
004: * Contact: jonas-team@objectweb.org
005: *
006: * This library is free software; you can redistribute it and/or
007: * modify it under the terms of the GNU Lesser General Public
008: * License as published by the Free Software Foundation; either
009: * version 2.1 of the License, or any later version.
010: *
011: * This library is distributed in the hope that it will be useful,
012: * but WITHOUT ANY WARRANTY; without even the implied warranty of
013: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014: * Lesser General Public License for more details.
015: *
016: * You should have received a copy of the GNU Lesser General Public
017: * License along with this library; if not, write to the Free Software
018: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
019: * USA
020: *
021: * --------------------------------------------------------------------------
022: * $Id: JacORBPRODelegate.java 6735 2005-05-10 14:10:14Z benoitf $
023: * --------------------------------------------------------------------------
024: */package org.objectweb.jonas_lib.naming;
025:
026: import java.rmi.Remote;
027: import java.rmi.RemoteException;
028:
029: import javax.rmi.CORBA.Tie;
030: import javax.rmi.CORBA.Util;
031:
032: import org.jacorb.poa.RequestProcessor;
033: import org.omg.PortableServer.Servant;
034:
035: import org.objectweb.carol.jndi.ns.JacORBCosNaming;
036: import org.objectweb.carol.jndi.spi.JacORBIIOPContext;
037:
038: import org.objectweb.jonas_ejb.container.JHome;
039: import org.objectweb.jonas_ejb.container.JRemote;
040:
041: /**
042: * Use EJB context classloader when possible
043: * @author Florent Benoit
044: */
045: public class JacORBPRODelegate extends
046: org.objectweb.carol.rmi.multi.JacORBPRODelegate {
047:
048: /**
049: * Makes a server object ready to receive remote calls. Note that subclasses
050: * of PortableRemoteObject do not need to call this method, as it is called
051: * by the constructor.
052: * @param obj the server object to export.
053: * @exception RemoteException if export fails.
054: */
055: public void exportObject(Remote obj) throws RemoteException {
056:
057: // For JacORB, we need first to unexport object as it is not associated
058: // to an ORB
059: try {
060: unexportObject(obj);
061: } catch (Exception eee) {
062: // Nothing
063: }
064:
065: /* Now export it */
066: try {
067: super .exportObject(obj);
068: } catch (Exception ee) {
069: // Nothing
070: }
071:
072: // Connect all EJB Home and Remote interfaces, and objectweb components (JOTM, JORAM, ...)
073: if (obj instanceof JHome
074: || obj instanceof JRemote
075: || obj.getClass().getName().indexOf("org.objectweb") != -1
076: || obj
077: .getClass()
078: .getName()
079: .equals(
080: "javax.management.remote.rmi.RMIConnectionImpl")) {
081:
082: Tie theTie = Util.getTie(obj);
083:
084: // Then connect it to the ORB
085: if (theTie != null) {
086: theTie.orb(JacORBCosNaming.getOrb());
087: }
088: }
089:
090: }
091:
092: /**
093: * Checks to ensure that an object of a remote or abstract interface type
094: * can be cast to a desired type.
095: * @param narrowFrom the object to check.
096: * @param narrowTo the desired type.
097: * @return an object which can be cast to the desired type.
098: * @throws ClassCastException if narrowFrom cannot be cast to narrowTo.
099: */
100: public Object narrow(Object narrowFrom, Class narrowTo)
101: throws ClassCastException {
102: // Save old classloader
103: ClassLoader old = Thread.currentThread()
104: .getContextClassLoader();
105:
106: try {
107: // Try to get EJB classloader
108: Thread currentThread = Thread.currentThread();
109: if (currentThread != null
110: && (currentThread instanceof RequestProcessor)) {
111: RequestProcessor rp = (RequestProcessor) currentThread;
112: if (rp != null) {
113: Servant servant = rp.getServant();
114: if (servant != null) {
115: Tie tie = null;
116: if (servant instanceof Tie) {
117: tie = (Tie) servant;
118: Remote target = tie.getTarget();
119: if (target instanceof JHome) {
120: JHome jHome = (JHome) target;
121: ClassLoader cll = jHome.getBf()
122: .myClassLoader();
123: Thread.currentThread()
124: .setContextClassLoader(cll);
125: } else if (target instanceof JRemote) {
126: JRemote jRemote = (JRemote) target;
127: ClassLoader cll = jRemote.getBf()
128: .myClassLoader();
129: Thread.currentThread()
130: .setContextClassLoader(cll);
131: }
132: }
133: }
134: }
135: }
136: } catch (Exception e) {
137: // nothing
138: } catch (Error e) {
139: // nothing
140: }
141:
142: // Call super method with right classloader
143: Object narrowResult = null;
144: try {
145: narrowResult = super .narrow(narrowFrom, narrowTo);
146: } finally {
147: // reset to old classloader
148: Thread.currentThread().setContextClassLoader(old);
149: }
150:
151: return narrowResult;
152: }
153:
154: }
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