diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/javax/naming/giop/GiopNamingServiceFactory.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/javax/naming/giop/GiopNamingServiceFactory.java | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/naming/giop/GiopNamingServiceFactory.java b/gcc-4.4.3/libjava/classpath/gnu/javax/naming/giop/GiopNamingServiceFactory.java new file mode 100644 index 000000000..6c221548f --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/javax/naming/giop/GiopNamingServiceFactory.java @@ -0,0 +1,179 @@ +/* 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(); + } +} |