/**
* Copyright (C) 2012 LinkedIn Inc <opensource@linkedin.com>
*
* 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.
*/
package com.linkedin.helix.controller.stages;
import org.apache.log4j.Logger;
import com.linkedin.helix.HelixDataAccessor;
import com.linkedin.helix.HelixManager;
import com.linkedin.helix.controller.pipeline.AbstractBaseStage;
import com.linkedin.helix.controller.pipeline.StageException;
public class ReadHealthDataStage extends AbstractBaseStage
{
private static final Logger LOG = Logger.getLogger(ReadHealthDataStage.class.getName());
HealthDataCache _cache;
public ReadHealthDataStage()
{
_cache = new HealthDataCache();
}
@Override
public void process(ClusterEvent event) throws Exception
{
long startTime = System.currentTimeMillis();
HelixManager manager = event.getAttribute("helixmanager");
if (manager == null)
{
throw new StageException("HelixManager attribute value is null");
}
// DataAccessor dataAccessor = manager.getDataAccessor();
HelixDataAccessor accessor = manager.getHelixDataAccessor();
_cache.refresh(accessor);
event.addAttribute("HealthDataCache", _cache);
long processLatency = System.currentTimeMillis() - startTime;
addLatencyToMonitor(event, processLatency);
}
}