| /* |
| * 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. |
| */ |
| |
| package org.apache.tajo.engine.planner.physical; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.IOUtils; |
| import org.apache.tajo.catalog.Column; |
| import org.apache.tajo.catalog.Schema; |
| import org.apache.tajo.catalog.SortSpec; |
| import org.apache.tajo.conf.TajoConf; |
| import org.apache.tajo.exception.TajoInternalError; |
| import org.apache.tajo.plan.logical.CreateIndexNode; |
| import org.apache.tajo.plan.util.PlannerUtil; |
| import org.apache.tajo.storage.*; |
| import org.apache.tajo.storage.index.bst.BSTIndex; |
| import org.apache.tajo.storage.index.bst.BSTIndex.BSTIndexWriter; |
| import org.apache.tajo.worker.TaskAttemptContext; |
| |
| import java.io.IOException; |
| |
| public class StoreIndexExec extends UnaryPhysicalExec { |
| private static final Log LOG = LogFactory.getLog(StoreIndexExec.class); |
| private BSTIndexWriter indexWriter; |
| private final CreateIndexNode logicalPlan; |
| private int[] indexKeys = null; |
| private Schema keySchema; |
| private TupleComparator comparator; |
| |
| public StoreIndexExec(final TaskAttemptContext context, final CreateIndexNode logicalPlan, |
| final PhysicalExec child) { |
| super(context, logicalPlan.getInSchema(), logicalPlan.getOutSchema(), child); |
| this.logicalPlan = logicalPlan; |
| } |
| |
| @Override |
| public void init() throws IOException { |
| super.init(); |
| |
| SortSpec[] sortSpecs = logicalPlan.getKeySortSpecs(); |
| indexKeys = new int[sortSpecs.length]; |
| keySchema = PlannerUtil.sortSpecsToSchema(sortSpecs); |
| |
| Column col; |
| for (int i = 0 ; i < sortSpecs.length; i++) { |
| col = sortSpecs[i].getSortKey(); |
| indexKeys[i] = inSchema.getColumnId(col.getQualifiedName()); |
| } |
| |
| // TODO: this line should be improved to allow multiple scan executors. |
| ScanExec scanExec = PhysicalPlanUtil.findExecutor(this, ScanExec.class); |
| if (scanExec == null) { |
| throw new TajoInternalError("Cannot find scan executors."); |
| } |
| |
| TajoConf conf = context.getConf(); |
| Path indexPath = new Path(logicalPlan.getIndexPath().toString(), |
| IndexExecutorUtil.getIndexFileName(conf, scanExec.getFragments()[0])); |
| // TODO: Create factory using reflection |
| BSTIndex bst = new BSTIndex(conf); |
| this.comparator = new BaseTupleComparator(keySchema, sortSpecs); |
| this.indexWriter = bst.getIndexWriter(indexPath, BSTIndex.TWO_LEVEL_INDEX, keySchema, comparator); |
| this.indexWriter.setLoadNum(100); |
| this.indexWriter.init(); |
| } |
| |
| @Override |
| public Tuple next() throws IOException { |
| Tuple tuple; |
| Tuple keyTuple; |
| long offset; |
| |
| while((tuple = child.next()) != null) { |
| offset = tuple.getOffset(); |
| keyTuple = new VTuple(keySchema.size()); |
| RowStoreUtil.project(tuple, keyTuple, indexKeys); |
| indexWriter.write(keyTuple, offset); |
| } |
| return null; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| super.close(); |
| |
| indexWriter.flush(); |
| IOUtils.cleanup(LOG, indexWriter); |
| |
| indexWriter = null; |
| } |
| } |