/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@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.pinot.core.query.planner;
import java.util.ArrayList;
import java.util.List;
import com.linkedin.pinot.common.request.BrokerRequest;
import com.linkedin.pinot.core.indexsegment.IndexSegment;
/**
* An implementation of QueryPlanner, will mark all the segments with 0 degree in the graph.
*
*/
public class FixedNumOfSegmentsPerJobQueryPlannerImpl implements QueryPlanner {
int _numSegmentsPerJob = 0;
public FixedNumOfSegmentsPerJobQueryPlannerImpl() {
super();
}
public FixedNumOfSegmentsPerJobQueryPlannerImpl(int numJobs) {
super();
setNumJobs(numJobs);
}
public void setNumJobs(int numSegmentsPerJob) {
_numSegmentsPerJob = numSegmentsPerJob;
}
@Override
public QueryPlan computeQueryPlan(BrokerRequest brokerRequest, List<IndexSegment> indexSegmentList) {
QueryPlanCreator queryPlanCreator = new QueryPlanCreator(brokerRequest);
List<IndexSegment> vertexSegmentList = new ArrayList<IndexSegment>();
int i = 0;
for (IndexSegment indexSegment : indexSegmentList) {
vertexSegmentList.add(indexSegment);
if ((++i) % _numSegmentsPerJob == 0) {
queryPlanCreator.addJobVertexWithDependency(null, new JobVertex(vertexSegmentList));
vertexSegmentList = new ArrayList<IndexSegment>();
}
}
if (vertexSegmentList.size() > 0) {
queryPlanCreator.addJobVertexWithDependency(null, new JobVertex(vertexSegmentList));
}
return queryPlanCreator.buildQueryPlan();
}
}