/*
    * Copyright 2001-2010 The Apache Software Foundation.
    * 
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * 
    *      http://www.apache.org/licenses/LICENSE-2.0
    * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  package org.apache.juddi;
  
  import javax.naming.NamingException;
  
  import org.apache.commons.configuration.ConfigurationException;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.juddi.config.AppConfig;
  import org.apache.juddi.config.Property;
  import org.apache.juddi.replication.ReplicationNotifier;
  import org.apache.juddi.subscription.SubscriptionNotifier;
  
  public class Registry {
  
          private static Registry registry = null;
          private static Log log = LogFactory.getLog(Registry.class);
          private static SubscriptionNotifier subscriptionNotifier = null;
          private static ReplicationNotifier replicationNotifier = null;
  
          /**
           * Singleton.
           */
          private Registry() {
                  super();
          }
  
          /**
           * Stops the registry.
           *
           * @throws ConfigurationException
           */
          public synchronized static void stop() throws ConfigurationException {
                  if (registry != null) {
                          log.info("Stopping jUDDI registry...");
                          if (subscriptionNotifier != null) {
                                  log.info("Shutting down SubscriptionNotifier");
                                  subscriptionNotifier.cancel();
                                  subscriptionNotifier = null;
                          }
                          if (replicationNotifier != null) {
                                  replicationNotifier.cancel();
                                  replicationNotifier = null;
                          }
                          registry = null;
                          log.info("jUDDI shutdown completed.");
                  }
          }
  
          /**
           * Starts the registry.
           *
           * @throws ConfigurationException
           */
          public synchronized static void start() throws ConfigurationException {
                  if (registry == null) {
                          log.info("Starting jUDDI registry...This is node " + AppConfig.getConfiguration().getString(Property.JUDDI_NODE_ID, ""));
                          registry = new Registry();
                          replicationNotifier = new ReplicationNotifier();
                          AppConfig.triggerReload();
                          if (AppConfig.getConfiguration().getBoolean(Property.JUDDI_SUBSCRIPTION_NOTIFICATION, true)) {
                                  subscriptionNotifier = new SubscriptionNotifier();
                          }
                          log.info("jUDDI registry started successfully.");
                  }
          }
  
  }