/* * 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.kylin.query.exec; import org.apache.calcite.DataContext; import org.apache.calcite.linq4j.Enumerable; import org.apache.calcite.rel.RelNode; import org.apache.calcite.rel.type.RelDataType; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class QueryEngineFactory { private static final Logger log = LoggerFactory.getLogger(QueryEngineFactory.class); public static Enumerable<Object> computeSCALA(DataContext dataContext, RelNode relNode, RelDataType resultType) throws IllegalAccessException, ClassNotFoundException, InstantiationException { try { String property = System.getProperty("kylin-query-engine", "org.apache.kylin.query.runtime.SparkEngine"); QueryEngine o = (QueryEngine) Class.forName(property).newInstance(); return o.computeSCALA(dataContext, relNode, resultType); } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { throw e; } } public static Enumerable<Object[]> compute(DataContext dataContext, RelNode relNode, RelDataType resultType) throws IllegalAccessException, ClassNotFoundException, InstantiationException { try { String property = System.getProperty("kylin-query-engine", "org.apache.kylin.query.runtime.SparkEngine"); QueryEngine o = (QueryEngine) Class.forName(property).newInstance(); return o.compute(dataContext, relNode, resultType); } catch (InstantiationException | IllegalAccessException | ClassNotFoundException e) { throw e; } } public static Enumerable<Object[]> computeAsync(DataContext dataContext, RelNode relNode, RelDataType resultType) { throw new UnsupportedOperationException(""); } }