package org.apache.helix.controller.stages;
/*
* 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.
*/
import org.apache.helix.HelixDataAccessor;
import org.apache.helix.HelixManager;
import org.apache.helix.controller.pipeline.AbstractBaseStage;
import org.apache.helix.controller.pipeline.StageException;
import org.apache.helix.model.InstanceConfig;
import org.apache.helix.monitoring.mbeans.ClusterStatusMonitor;
import org.apache.log4j.Logger;
public class ReadClusterDataStage extends AbstractBaseStage
{
private static final Logger logger = Logger
.getLogger(ReadClusterDataStage.class.getName());
ClusterDataCache _cache;
public ReadClusterDataStage()
{
_cache = new ClusterDataCache();
}
@Override
public void process(ClusterEvent event) throws Exception
{
long startTime = System.currentTimeMillis();
logger.info("START ReadClusterDataStage.process()");
HelixManager manager = event.getAttribute("helixmanager");
if (manager == null)
{
throw new StageException("HelixManager attribute value is null");
}
HelixDataAccessor dataAccessor = manager.getHelixDataAccessor();
_cache.refresh(dataAccessor);
ClusterStatusMonitor clusterStatusMonitor = (ClusterStatusMonitor) event.getAttribute("clusterStatusMonitor");
if(clusterStatusMonitor != null)
{
int disabledInstances = 0;
int disabledPartitions = 0;
for(InstanceConfig config : _cache._instanceConfigMap.values())
{
if(config.getInstanceEnabled() == false)
{
disabledInstances ++;
}
if(config.getDisabledPartitionMap() != null)
{
disabledPartitions += config.getDisabledPartitionMap().size();
}
}
clusterStatusMonitor.setClusterStatusCounters(_cache._liveInstanceMap.size(), _cache._instanceConfigMap.size(),
disabledInstances, disabledPartitions);
}
event.addAttribute("ClusterDataCache", _cache);
long endTime = System.currentTimeMillis();
logger.info("END ReadClusterDataStage.process(). took: " + (endTime - startTime) + " ms");
}
}