content: /*
   * 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.ambari.server.events;
  
  import org.apache.ambari.server.orm.entities.AlertCurrentEntity;
  import org.apache.ambari.server.orm.entities.AlertHistoryEntity;
  import org.apache.ambari.server.state.Alert;
  import org.apache.ambari.server.state.AlertFirmness;
  import org.apache.ambari.server.state.AlertState;
  
  /**
   * The {@link AlertStateChangeEvent} is fired when an {@link Alert} instance has
   * its {@link AlertState} changed or has it's {@link AlertFirmness} changed.
   * <p/>
   * An {@link AlertState} change coupled with a {@link AlertFirmness#HARD}
   * firmness is what would eventually trigger notifications to be created.
   */
  public class AlertStateChangeEvent extends AlertEvent {
  
    /**
     * The prior alert state.
     */
    private final AlertState m_fromState;
  
    /**
     * The prior alert firmness.
     */
    private final AlertFirmness m_fromFirmness;
  
    /**
     * The current alert, including state and history.
     */
    private final AlertCurrentEntity m_currentAlert;
  
    /**
     * The historical record for this alert state change event.
     */
    private final AlertHistoryEntity m_history;
  
    /**
     * Constructor.
     *
     * @param clusterId
     * @param alert
     * @param currentAlert
     * @param fromState
     * @param fromFirmness
     */
    public AlertStateChangeEvent(long clusterId, Alert alert,
        AlertCurrentEntity currentAlert, AlertState fromState, AlertFirmness fromFirmness) {
      super(clusterId, alert);
  
      m_currentAlert = currentAlert;
      m_history = currentAlert.getAlertHistory();
      m_fromState = fromState;
      m_fromFirmness = fromFirmness;
    }
  
    /**
     * Gets the current alert.
     *
     * @return the current alert.
     */
    public AlertCurrentEntity getCurrentAlert() {
      return m_currentAlert;
    }
  
    /**
     * Gets the newly created item in alert history.
     *
     * @return the newly created historical item.
     */
    public AlertHistoryEntity getNewHistoricalEntry() {
      return m_history;
    }
  
    /**
     * Gets the prior state of the alert.
     *
     * @return the prior state of the alert.
     */
    public AlertState getFromState() {
      return m_fromState;
    }
  
    /**
     * Gets the prior firmness of the alert.
     *
     * @return the prior firmness of the alert.
     */
    public AlertFirmness getFromFirmness() {
      return m_fromFirmness;
    }
  
    /**
     * {@inheritDoc}
     */
    @Override
    public String toString() {
      StringBuilder buffer = new StringBuilder("AlertStateChangeEvent{");
      buffer.append("cluserId=").append(m_clusterId);
      buffer.append(", fromState=").append(m_fromState);
      buffer.append(", firmness=").append(m_currentAlert.getFirmness());
      buffer.append(", alert=").append(m_alert);
  
      buffer.append("}");
      return buffer.toString();
    }
  }
  