| /* GiopNamingServiceFactory.java -- handles corbaname: urls |
| 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.javax.naming.giop; |
| |
| import gnu.CORBA.OrbFunctional; |
| |
| import gnu.java.lang.CPStringBuilder; |
| |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.TreeMap; |
| |
| import javax.naming.Context; |
| import javax.naming.Name; |
| |
| import org.omg.CORBA.ORB; |
| |
| /** |
| * The context factory to represent the corbaname: style urls. Such URL states |
| * that the CORBA naming service exists on the given host. This service can |
| * return the required object, finding it by the given name. The names are |
| * parsed using the specification of the corbaname urls. Being the naming |
| * service, the returned context supports creating the subcontexts, forwarding |
| * this task to the existing naming service. |
| * |
| * @author Audrius Meskauskas (audriusa@Bioinformatics.org) |
| */ |
| public class GiopNamingServiceFactory |
| { |
| /** |
| * The default naming service provider. It is assumed, that the naming service |
| * is running on the port 900 of the local host, using the GIOP version 1.2 |
| */ |
| public static final String DEFAULT_PROVIDER = |
| "corbaloc:iiop:1.2@127.0.0.1:900/NameService"; |
| |
| /** |
| * The table of all instantiated ORB's that are found by they ORB |
| * properties signatures. If all ORB related properties are the same, |
| * the ORB's are shared. |
| */ |
| public static Hashtable orbs = new Hashtable(); |
| |
| |
| /** |
| * Create a new instance of the corbaname URL context. |
| */ |
| public Object getObjectInstance(Object refObj, Name name, Context nameCtx, |
| Hashtable environment) |
| { |
| String provider = (String) environment.get(Context.PROVIDER_URL); |
| if (provider == null) |
| provider = DEFAULT_PROVIDER; |
| |
| String orbSignature = getOrbSignature(environment); |
| |
| ORB orb; |
| synchronized (orbs) |
| { |
| orb = (ORB) orbs.get(orbSignature); |
| if (orb == null) |
| { |
| Properties props = new Properties(); |
| props.putAll(environment); |
| orb = ORB.init(new String[0], props); |
| orbs.put(orbSignature, orb); |
| final ORB runIt = orb; |
| new Thread() |
| { |
| public void run() |
| { |
| runIt.run(); |
| } |
| }.start(); |
| } |
| } |
| |
| return new GiopNamingServiceURLContext(environment, this, orb); |
| } |
| |
| /** |
| * Check if this ORB is still in use (maybe it is time to shutdown it). This |
| * method only works when the Classpath CORBA implementation is used |
| * (otherwise it return without action). The method is called from the close() |
| * method of the created context. |
| * |
| * @param orb |
| * the ORB that maybe is no longer referenced. |
| */ |
| public void checkIfReferenced(ORB orb) |
| { |
| synchronized (orbs) |
| { |
| // We can only do this with the Classpath implementation. |
| if (orb instanceof OrbFunctional) |
| { |
| OrbFunctional cOrb = (OrbFunctional) orb; |
| // If there are no connected objects, we can destroy the orb. |
| if (cOrb.countConnectedObjects() == 0) |
| { |
| cOrb.shutdown(false); |
| cOrb.destroy(); |
| |
| Enumeration keys = orbs.keys(); |
| Object key; |
| Remove: while (keys.hasMoreElements()) |
| { |
| key = keys.nextElement(); |
| if (orbs.get(key) == orb) |
| { |
| orbs.remove(key); |
| break Remove; |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| /** |
| * Get all properties. |
| */ |
| public String getOrbSignature(Map props) |
| { |
| TreeMap map = new TreeMap(); |
| map.putAll(props); |
| CPStringBuilder b = new CPStringBuilder(50*props.size()); |
| |
| Iterator iter = map.entrySet().iterator(); |
| Map.Entry m; |
| while (iter.hasNext()) |
| { |
| m = (Map.Entry) iter.next(); |
| b.append(m.getKey()); |
| b.append('='); |
| b.append(m.getValue()); |
| } |
| return b.toString(); |
| } |
| } |