content: /**
   *  Licensed to4the Apache Software Foundation (ASF) under one
   *  or more contributor license agreements.  See the NOTICE file
   *  distributed with this work for additional information
   *  regarding copyright ownership. The ASF licenses this file to
   *  You 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.aries.samples.ariestrader.util;
  
  import javax.naming.InitialContext;
  import javax.naming.NamingException;
  
  /**
   * ServiceUtilities provides servlet specific client side
   * utility functions.
   */
  public class ServiceUtilities {
  
      /**
       * Lookup and return an osgi service
       * 
       * @return Object
       * @exception javax.io.IOException
       *                If an exception occurs during the service
       *                lookup
       * 
       */
      public static final Object getOSGIService(String serviceName) {
          if (Log.doTrace())
              Log.trace("ServiceUtilities:getOSGIService()", serviceName);
          return getOSGIService(serviceName, null);
      }
  
      /**
       * Lookup and return an osgi service
       * 
       * @return Object
       * 
       */
      public static final Object getOSGIService(String serviceName, String filter) {
          if (Log.doTrace())
              Log.trace("ServiceUtilities:getOSGIService()", serviceName, filter);
          String name = TradeConfig.OSGI_SERVICE_PREFIX + serviceName;
          if (filter != null) {
              name = name + "/" + filter;
          }
  
          try {
              InitialContext ic = new InitialContext();
              return ic.lookup(name);
          } catch (NamingException e) {
              Log.error("ServiceUtilities:getOSGIService() -- NamingException on OSGI service lookup", name, e);
              e.printStackTrace();
              return null;
          }
      }
  }