EventContext.ONELEVEL_SCOPE : EventContext « javax.naming.event « Java by API

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2. javax.naming.event
3. EventContext

EventContext.ONELEVEL_SCOPE

    

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.event.EventContext;
import javax.naming.event.NamingExceptionEvent;
import javax.naming.event.NamingListener;
import javax.naming.ldap.UnsolicitedNotificationEvent;
import javax.naming.ldap.UnsolicitedNotificationListener;

/**
 * Demonstrates how to register a listener for Unsolicited Notifications. In
 * order for the listener to receive a notification, you must prod the directory
 * server to send an Unsolicited Notification. The procedure for doing so is
 * directory-dependent.
 * 
 * usage: java RegUnsol
 */
class RegUnsol {
  public static void main(String[] args) {

    // Set up environment for creating initial context
    Hashtable<String, Object> env = new Hashtable<String, Object>(11);
    env
        .put(Context.INITIAL_CONTEXT_FACTORY,
            "com.sun.jndi.ldap.LdapCtxFactory");
    env.put(Context.PROVIDER_URL, "ldap://localhost:389/o=JNDItutorial");

    try {
      // Get event context for registering listener
      EventContext ctx = (EventContext) (new InitialContext(env)
          .lookup("ou=People"));

      // Create listener
      NamingListener listener = new UnsolListener();

      // Register listener with context (all targets equivalent)
      ctx.addNamingListener("", EventContext.ONELEVEL_SCOPE, listener);

      // Wait 1 minutes for listener to receive events
      try {
        Thread.sleep(60000);
      } catch (InterruptedException e) {
        System.out.println("sleep interrupted");
      }

      // Not strictly necessary if we're going to close context anyhow
      ctx.removeNamingListener(listener);

      // Close context when we're done
      ctx.close();

    } catch (NamingException e) {
      e.printStackTrace();
    }
  }

  /**
   * A sample UnsolicitedNotificationListener.
   */
  static class UnsolListener implements UnsolicitedNotificationListener {
    public void notificationReceived(UnsolicitedNotificationEvent evt) {
      System.out.println("received: " + evt);
    }

    public void namingExceptionThrown(NamingExceptionEvent evt) {
      System.out.println(">>> UnsolListener got an exception");
      evt.getException().printStackTrace();
    }
  }
}

   
    
    
    
  

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