jnidzwetzki/bboxdb

/*******************************************************************************
 *
 *    Copyright (C) 2015-2022 the BBoxDB project
 *  
 *    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 org.bboxdb.distribution;

import java.util.function.BiConsumer;

import org.bboxdb.distribution.membership.BBoxDBInstance;
import org.bboxdb.distribution.partitioner.SpacePartitioner;
import org.bboxdb.distribution.partitioner.SpacePartitionerCache;
import org.bboxdb.distribution.region.DistributionRegion;
import org.bboxdb.distribution.region.DistributionRegionHelper;
import org.bboxdb.distribution.zookeeper.DistributionRegionAdapter;
import org.bboxdb.distribution.zookeeper.ZookeeperClientFactory;
import org.bboxdb.distribution.zookeeper.ZookeeperException;
import org.bboxdb.misc.BBoxDBException;
import org.bboxdb.storage.entity.TupleStoreName;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TupleStoreFlushZookeeperAdapter implements BiConsumer<TupleStoreName, Long> {

    /**
     * The Logger
     */
    private final static Logger logger = LoggerFactory.getLogger(TupleStoreFlushZookeeperAdapter.class);
    
    @Override
    public void accept(final TupleStoreName ssTableName, final Long flushTimestamp) {
        
        // Fetch the local instance
        final BBoxDBInstance localInstance = ZookeeperClientFactory.getLocalInstanceName();
        final String distributionGroup = ssTableName.getDistributionGroup();

        try {            
            final SpacePartitioner spacepartitioner = SpacePartitionerCache.getInstance()
                    .getSpacePartitionerForGroupName(distributionGroup);

            final DistributionRegion distributionGroupRoot = spacepartitioner.getRootNode();
            
            if(distributionGroupRoot == null) {
                logger.error("Root for {} is null, not executing callback", ssTableName);
                return;
            }
            
            final long regionId = ssTableName.getRegionId().getAsLong();
            
            final DistributionRegion distributionRegion 
                = DistributionRegionHelper.getDistributionRegionForNamePrefix(distributionGroupRoot, regionId);
        
            logger.debug("Updating checkpoint for: {} to {}", ssTableName.getFullname(), flushTimestamp);
            final DistributionRegionAdapter distributionRegionAdapter 
                = ZookeeperClientFactory.getZookeeperClient().getDistributionRegionAdapter();
            
            if(distributionRegionAdapter != null && distributionRegion != null) {
                distributionRegionAdapter.setCheckpointForDistributionRegion(distributionRegion, localInstance, flushTimestamp);
            }
            
        } catch (ZookeeperException | BBoxDBException e) {
            
            if(Thread.currentThread().isInterrupted()) {
                return;
            }
            
            logger.warn("Got an error while writing data to zookeeper for: " + distributionGroup);
            logger.debug("Full exception is", e);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            return;
        }
    }

}