DegraderLoadBalancerStrategyV2Jmx.java

/*
   Copyright (c) 2012 LinkedIn Corp.

   Licensed 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.
*/

/**
 * $Id: $
 */

package com.linkedin.d2.jmx;

import com.linkedin.d2.balancer.strategies.degrader.DegraderLoadBalancerStrategyV2;

import com.linkedin.d2.balancer.util.hashing.Ring;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;


/**
 * @author David Hoa
 * @version $Revision: $
 */

// this class is to be killed or updated
public class DegraderLoadBalancerStrategyV2Jmx implements DegraderLoadBalancerStrategyV2JmxMBean
{
  private final DegraderLoadBalancerStrategyV2 _strategy;

  public DegraderLoadBalancerStrategyV2Jmx(DegraderLoadBalancerStrategyV2 strategy)
  {
    _strategy = strategy;
  }

  @Override
  public double getOverrideClusterDropRate()
  {
    @SuppressWarnings("deprecation")
    double rate = _strategy.getCurrentOverrideDropRate();
    return rate;
  }

  @Override
  public String toString()
  {
    return "DegraderLoadBalancerStrategyV2Jmx [_strategy=" + _strategy + "]";
  }

  @Override
  public int getTotalPointsInHashRing()
  {
    Map<URI, Integer> uris = _strategy.getState().getPointsMap();
    int total = 0;
    for (Map.Entry<URI, Integer> entry : uris.entrySet())
    {
      total += entry.getValue();
    }
    return total;
  }

  @Override
  public String getPointsMap()
  {
    return _strategy.getState().getPointsMap().toString();
  }

  @Override
  public String getUnhealthyClientsPoints()
  {
    int pointsPerWeight = _strategy.getConfig().getPointsPerWeight();
    List<String> result = new ArrayList<String>();
    for (Map.Entry<URI, Integer> entry : _strategy.getState().getPointsMap().entrySet())
    {
      if (entry.getValue() < pointsPerWeight)
      {
        result.add(entry.getKey().toString() + ":" + entry.getValue() + "/" + pointsPerWeight);
      }
    }
    return result.toString();
  }

  @Override
  public String getRingInformation()
  {
    Ring<URI> ring = _strategy.getRing();
    if (ring == null)
    {
      return "Ring for that partition is null";
    }
    return ring.toString();
  }
}