geode-core/src/main/java/org/apache/geode/internal/admin/statalerts/DummyStatisticInfoImpl.java

/*
 * 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.statalerts;

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

import org.apache.geode.StatisticDescriptor;
import org.apache.geode.Statistics;
import org.apache.geode.internal.admin.StatAlertsManager;

/**
 * Implementation {@link StatisticInfo} This does not contains associated statistics object
 *
 * This has been created client(E.g GFMon2.0), where we actually don't need statistic object. So,
 * Instance of this will be light weight object So that we can reduce the overhead of data transfer
 * across network and serialization/dserialization
 *
 * on server side , {@link StatAlertsManager} create instance of {@link StatisticInfoImpl} class
 * with help of this class instance
 *
 */
public class DummyStatisticInfoImpl implements StatisticInfo {
  private static final long serialVersionUID = -5456779525795868187L;

  protected String statisticsTypeName;

  protected String statisticsTextId;

  protected String statisticName;

  public DummyStatisticInfoImpl() {}

  public DummyStatisticInfoImpl(String statisticsTypeName, String statisticsTextId,
      String statisticName) {
    super();
    this.statisticsTypeName = statisticsTypeName;
    this.statisticsTextId = statisticsTextId;
    this.statisticName = statisticName;
  }

  @Override
  public String getStatisticName() {
    return statisticName;
  }

  @Override
  public String getStatisticsTextId() {
    return statisticsTextId;
  }

  @Override
  public void setStatisticName(String statisticName) {
    this.statisticName = statisticName;
  }

  @Override
  public void setStatisticsTextId(String statisticsTextId) {
    this.statisticsTextId = statisticsTextId;
  }

  @Override
  public StatisticDescriptor getStatisticDescriptor() {
    throw new UnsupportedOperationException(
        "DummyStatisticInfoImpl class does not support getStatisticDescriptor method.");
  }

  @Override
  public Statistics getStatistics() {
    throw new UnsupportedOperationException(
        "DummyStatisticInfoImpl class does not support getStatistics method.");
  }

  @Override
  public String getStatisticsTypeName() {
    return statisticsTypeName;
  }

  @Override
  public void setStatisticsTypeName(String statisticsType) {
    this.statisticsTypeName = statisticsType;
  }

  @Override
  public Number getValue() {
    throw new UnsupportedOperationException(
        "DummyStatisticInfoImpl class does not support getValue method.");
  }

  @Override
  public boolean equals(Object object) {

    if (object == null || !(object instanceof DummyStatisticInfoImpl)) {
      return false;
    }

    DummyStatisticInfoImpl other = (DummyStatisticInfoImpl) object;

    if (this.statisticName.equals(other.getStatisticName())
        && this.statisticsTypeName.equals(other.getStatisticsTypeName())
        && this.statisticsTextId != null
        && this.statisticsTextId.equals(other.getStatisticsTextId())) {
      return true;

    }

    return false;
  }

  @Override
  public void toData(DataOutput out) throws IOException {
    out.writeUTF(this.statisticsTypeName);
    out.writeUTF(this.statisticsTextId);
    out.writeUTF(this.statisticName);
  }

  @Override
  public void fromData(DataInput in) throws IOException, ClassNotFoundException {
    this.statisticsTypeName = in.readUTF();
    this.statisticsTextId = in.readUTF();
    this.statisticName = in.readUTF();
  }

  @Override
  public int hashCode() {
    return (statisticName + ":" + statisticsTextId).hashCode();
  }

  @Override
  public String toString() {
    return this.statisticsTypeName + " [" + this.statisticName + "]";
  }
}