/*
 * 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.geode.internal.admin.remote;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

import org.apache.geode.distributed.internal.SerialDistributionMessage;
import org.apache.logging.log4j.Logger;

import org.apache.geode.admin.AlertLevel;
import org.apache.geode.distributed.internal.DistributionManager;
import org.apache.geode.internal.admin.Alert;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.AlertAppender;
import org.apache.geode.internal.logging.log4j.LogMarker;

/**
 * A message that is sent to make members of the distributed system aware that a manager agent wants
 * alerts at a new level.
 *
 * @see AlertLevel
 *
 * @since GemFire 3.5
 */
public final class AlertLevelChangeMessage extends SerialDistributionMessage {

  private static final Logger logger = LogService.getLogger();

  /** The new alert level */
  private int newLevel;

  /////////////////////// Static Methods ///////////////////////

  /**
   * Creates a new <code>AlertLevelChangeMessage</code>
   */
  public static AlertLevelChangeMessage create(int newLevel) {
    AlertLevelChangeMessage m = new AlertLevelChangeMessage();
    m.newLevel = newLevel;
    return m;
  }

  ////////////////////// Instance Methods //////////////////////

  @Override
  public void process(DistributionManager dm) {
    AlertAppender.getInstance().removeAlertListener(this.getSender());

    if (this.newLevel != Alert.OFF) {
      AlertAppender.getInstance().addAlertListener(this.getSender(), this.newLevel);
      if (logger.isTraceEnabled(LogMarker.DM)) {
        logger.trace(LogMarker.DM, "Added new AlertListener to application log writer");
      }
    }
  }

  public int getDSFID() {
    return ALERT_LEVEL_CHANGE_MESSAGE;
  }

  @Override
  public void toData(DataOutput out) throws IOException {
    super.toData(out);
    out.writeInt(this.newLevel);
  }

  @Override
  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    super.fromData(in);
    this.newLevel = in.readInt();
  }

  @Override
  public String toString() {
    return LocalizedStrings.AlertLevelChangeMessage_CHANGING_ALERT_LEVEL_TO_0
        .toLocalizedString(AlertLevel.forSeverity(this.newLevel));
  }
}