/*
    * Licensed to the 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.logging.log4j.core.jmx;
  
  import java.util.List;
  import java.util.concurrent.Executor;
  import java.util.concurrent.atomic.AtomicLong;
  
  import javax.management.MBeanNotificationInfo;
  import javax.management.Notification;
  import javax.management.NotificationBroadcasterSupport;
  import javax.management.ObjectName;
  
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.status.StatusData;
  import org.apache.logging.log4j.status.StatusListener;
  import org.apache.logging.log4j.status.StatusLogger;
  
  /**
   * Implementation of the {@code StatusLoggerAdminMBean} interface.
   */
  public class StatusLoggerAdmin extends NotificationBroadcasterSupport implements
          StatusListener, StatusLoggerAdminMBean {
  
      private final AtomicLong sequenceNo = new AtomicLong();
      private final ObjectName objectName;
  
      /**
       * Constructs a new {@code StatusLoggerAdmin} with the {@code Executor} to
       * be used for sending {@code Notification}s asynchronously to listeners.
       * 
       * @param executor
       */
      public StatusLoggerAdmin(Executor executor) {
          super(executor, createNotificationInfo());
          try {
              objectName = new ObjectName(NAME);
          } catch (Exception e) {
              throw new IllegalStateException(e);
          }
          StatusLogger.getLogger().registerListener(this);
      }
  
      private static MBeanNotificationInfo createNotificationInfo() {
          String[] notifTypes = new String[] { NOTIF_TYPE_DATA,
                  NOTIF_TYPE_MESSAGE };
          String name = Notification.class.getName();
          String description = "StatusLogger has logged an event";
          return new MBeanNotificationInfo(notifTypes, name, description);
      }
  
      @Override
      public String[] getStatusDataHistory() {
          List<StatusData> data = getStatusData();
          String[] result = new String[data.size()];
          for (int i = 0; i < result.length; i++) {
              result[i] = data.get(i).getFormattedStatus();
          }
          return result;
      }
  
      @Override
      public List<StatusData> getStatusData() {
          return StatusLogger.getLogger().getStatusData();
      }
  
      @Override
      public String getLevel() {
          return StatusLogger.getLogger().getLevel().name();
      }
  
      @Override
      public void setLevel(String level) {
          StatusLogger.getLogger().setLevel(Level.valueOf(level));
      }
  
      /*
       * (non-Javadoc)
       * 
       * @see
       * org.apache.logging.log4j.status.StatusListener#log(org.apache.logging
       * .log4j.status.StatusData)
       */
      @Override
      public void log(StatusData data) {
         Notification notifMsg = new Notification(NOTIF_TYPE_MESSAGE,
                 getObjectName(), nextSeqNo(), now(), data.getFormattedStatus());
         sendNotification(notifMsg);
 
         Notification notifData = new Notification(NOTIF_TYPE_DATA,
                 getObjectName(), nextSeqNo(), now());
         notifData.setUserData(data);
         sendNotification(notifData);
     }
 
     /** @see StatusLoggerAdminMBean#NAME */
     public ObjectName getObjectName() {
         return objectName;
     }
 
     private long nextSeqNo() {
         return sequenceNo.getAndIncrement();
     }
 
     private long now() {
         return System.currentTimeMillis();
     }
 }