/*

  * This software is licensed under the Apache License, Version 2.0

  * (the "License") agreement; 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 net.admin4j.ui.filters;

 import javax.servlet.Filter;

 import javax.servlet.FilterConfig;

 import javax.servlet.ServletException;

 import net.admin4j.config.Admin4JConfiguration;

 import net.admin4j.util.Admin4jRuntimeException;

 import net.admin4j.util.notify.Notifier;

 import net.admin4j.util.notify.NotifierUtils;

 /**

  * Base filter that accepts a configured notifier.

  * 

  * <p>Init parameters for this filter are as follows:</p>

  * <li>notifier -- Required.  Handles admin notification.  See documentation for the Notifier you're using

  * for any additional configuration requirements.  For example, 'net.admin4j.util.notify.EmailNotifier'.</li>

  * 

  * @author D. Ashmore

  * @since 1.0

  */

 public abstract class BaseNotificationFilter extends BaseFilter implements Filter {

     protected Notifier notifier;

     public void init(FilterConfig config) throws ServletException {

         try {

             new Admin4JConfiguration();

             String notifierClassName = config.getInitParameter("notifier");

             this.notifier = NotifierUtils.configure(config, notifierClassName);

             if (this.notifier == null) {

                 throw new Admin4jRuntimeException("Neither default notifier provided nor notifier parameter for Filter specified.");

             }

         } catch (Throwable e) {

             logger.error("Error in boot sequence", e);

             throw new ServletException(e);

         } 

         Admin4JStandardFilterChain.registerFilter(this);

     }

 }