| /* |
| * 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.druid.query.topn; |
| |
| import com.google.inject.Inject; |
| import org.apache.druid.collections.NonBlockingPool; |
| import org.apache.druid.guice.annotations.Global; |
| import org.apache.druid.java.util.common.ISE; |
| import org.apache.druid.java.util.common.guava.Sequence; |
| import org.apache.druid.query.ChainedExecutionQueryRunner; |
| import org.apache.druid.query.QueryPlus; |
| import org.apache.druid.query.QueryProcessingPool; |
| import org.apache.druid.query.QueryRunner; |
| import org.apache.druid.query.QueryRunnerFactory; |
| import org.apache.druid.query.QueryToolChest; |
| import org.apache.druid.query.QueryWatcher; |
| import org.apache.druid.query.Result; |
| import org.apache.druid.query.context.ResponseContext; |
| import org.apache.druid.segment.Segment; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| */ |
| public class TopNQueryRunnerFactory implements QueryRunnerFactory<Result<TopNResultValue>, TopNQuery> |
| { |
| private final NonBlockingPool<ByteBuffer> computationBufferPool; |
| private final TopNQueryQueryToolChest toolchest; |
| private final QueryWatcher queryWatcher; |
| |
| @Inject |
| public TopNQueryRunnerFactory( |
| @Global NonBlockingPool<ByteBuffer> computationBufferPool, |
| TopNQueryQueryToolChest toolchest, |
| QueryWatcher queryWatcher |
| ) |
| { |
| this.computationBufferPool = computationBufferPool; |
| this.toolchest = toolchest; |
| this.queryWatcher = queryWatcher; |
| } |
| |
| @Override |
| public QueryRunner<Result<TopNResultValue>> createRunner(final Segment segment) |
| { |
| final TopNQueryEngine queryEngine = new TopNQueryEngine(computationBufferPool); |
| return new QueryRunner<Result<TopNResultValue>>() |
| { |
| @Override |
| public Sequence<Result<TopNResultValue>> run( |
| QueryPlus<Result<TopNResultValue>> input, |
| ResponseContext responseContext |
| ) |
| { |
| if (!(input.getQuery() instanceof TopNQuery)) { |
| throw new ISE("Got a [%s] which isn't a %s", input.getClass(), TopNQuery.class); |
| } |
| |
| TopNQuery query = (TopNQuery) input.getQuery(); |
| return queryEngine.query(query, segment.asStorageAdapter(), (TopNQueryMetrics) input.getQueryMetrics()); |
| } |
| }; |
| |
| } |
| |
| @Override |
| public QueryRunner<Result<TopNResultValue>> mergeRunners( |
| QueryProcessingPool queryProcessingPool, |
| Iterable<QueryRunner<Result<TopNResultValue>>> queryRunners |
| ) |
| { |
| return new ChainedExecutionQueryRunner<>(queryProcessingPool, queryWatcher, queryRunners); |
| } |
| |
| @Override |
| public QueryToolChest<Result<TopNResultValue>, TopNQuery> getToolchest() |
| { |
| return toolchest; |
| } |
| } |