ambari-metrics-timelineservice/src/main/java/org/apache/ambari/metrics/core/timeline/TimelineMetricServiceSummary.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.ambari.metrics.core.timeline;

import org.apache.ambari.metrics.core.timeline.availability.MetricCollectorHAController;
import org.apache.ambari.metrics.core.timeline.discovery.TimelineMetricMetadataManager;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

@XmlRootElement(name = "summary")
@XmlAccessorType(XmlAccessType.NONE)
/**
 * Class to provide basic summary of the state for AMS.
 * Can be used to add AMS health metrics in the future without trying to reach HBase.
 */
public class TimelineMetricServiceSummary {

  private Date timestamp;
  private Map<String, String> metadataSummary = new HashMap<>();
  private Map<String, String> aggregationSummary = new HashMap<>();
  static final Log LOG = LogFactory.getLog(TimelineMetricServiceSummary.class);

  TimelineMetricServiceSummary(TimelineMetricMetadataManager metricMetadataManager,
                               MetricCollectorHAController haController) {
    timestamp = new Date(System.currentTimeMillis());
    try {
      metadataSummary = metricMetadataManager.getMetadataSummary();
    } catch (Exception e) {
      LOG.error("Error fetching metadata summary : " + e);
    }
    if (haController != null) {
      aggregationSummary = haController.getAggregationSummary();
    }
  }

  @XmlElement(name = "timestamp")
  public Date getTimestamp() {
    return timestamp;
  }

  @XmlElement(name = "metadata")
  public Map<String, String> getMetadataSummary() {
    return metadataSummary;
  }

  @XmlElement(name = "aggregation")
  public Map<String, String> getAggregationSummary() {
    return aggregationSummary;
  }
}