/**
* EasyBeans
* Copyright (C) 2009 Bull S.A.S.
* Contact: easybeans@ow2.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
* --------------------------------------------------------------------------
* $Id: ClientSingleton.java 5369 2010-02-24 14:58:19Z benoitf $
* --------------------------------------------------------------------------
*/
package org.ow2.easybeans.examples.singleton;
import java.util.Hashtable;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
/**
* Simple client of the singleton.
* @author Florent Benoit
*/
public final class ClientSingleton {
/**
* Default InitialContextFactory to use.
*/
private static final String DEFAULT_INITIAL_CONTEXT_FACTORY = "org.objectweb.carol.jndi.spi.MultiOrbInitialContextFactory";
/**
* Utility class.
*/
private ClientSingleton() {
}
/**
* Main method.
* @param args the arguments (not required)
* @throws Exception if exception is found.
*/
public static void main(final String[] args) throws Exception {
Context initialContext = getInitialContext();
ISingletonShared singleton1 = (ISingletonShared) initialContext
.lookup("SingletonBean1");
ISingletonShared singleton2 = (ISingletonShared) initialContext
.lookup("SingletonBean2");
System.out.println("before: " + singleton1.getShared());
// set shared state
singleton1.setShared(2503 + (int) (Math.random() * 10));
singleton2.setShared(2503 + (int) (Math.random() * 10));
System.out.println("eager singleton" + singleton2.getShared());
System.out.println("after:" + singleton1.getShared());
}
/**
* @return Returns the InitialContext.
* @throws NamingException If the Context cannot be created.
*/
private static Context getInitialContext() throws NamingException {
// if user don't use jclient/client container
// we can specify the InitialContextFactory to use
// But this is *not recommended*.
Hashtable<String, Object> env = new Hashtable<String, Object>();
env.put(Context.INITIAL_CONTEXT_FACTORY, getInitialContextFactory());
// Usually a simple new InitialContext() without any parameters is sufficent.
// return new InitialContext();
return new InitialContext(env);
}
/**
* Returns a configurable InitialContextFactory classname.<br/>
* Can be configured with the <code>easybeans.client.initial-context-factory</code> System property.
* @return Returns a configurable InitialContextFactory classname.
*/
private static String getInitialContextFactory() {
String prop = System.getProperty("easybeans.client.initial-context-factory");
// If not found, use the default
if (prop == null) {
prop = DEFAULT_INITIAL_CONTEXT_FACTORY;
}
return prop;
}
}