| /* |
| * 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.rest.util; |
| |
| import org.apache.kylin.common.KylinConfig; |
| import org.apache.kylin.metadata.project.ProjectInstance; |
| import org.apache.kylin.metadata.project.ProjectManager; |
| import org.apache.kylin.rest.response.SQLResponse; |
| import org.apache.kylin.rest.signature.FactTableRealizationSetCalculator; |
| import org.apache.kylin.rest.signature.SignatureCalculator; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.kylin.shaded.com.google.common.base.Preconditions; |
| |
| public class SQLResponseSignatureUtil { |
| |
| public static final Logger logger = LoggerFactory.getLogger(SQLResponseSignatureUtil.class); |
| |
| public static boolean checkSignature(KylinConfig config, SQLResponse sqlResponse, String projectName) { |
| String old = sqlResponse.getSignature(); |
| if (old == null) { |
| return false; |
| } |
| String latest = createSignature(config, sqlResponse, projectName); |
| return old.equals(latest); |
| } |
| |
| public static String createSignature(KylinConfig config, SQLResponse sqlResponse, String projectName) { |
| ProjectInstance project = ProjectManager.getInstance(config).getProject(projectName); |
| Preconditions.checkNotNull(project); |
| |
| SignatureCalculator signatureCalculator; |
| try { |
| Class signatureClass = getSignatureClass(project.getConfig()); |
| signatureCalculator = (SignatureCalculator) signatureClass.getConstructor().newInstance(); |
| } catch (Exception e) { |
| logger.warn("Will use default signature since fail to construct signature due to " + e); |
| signatureCalculator = new FactTableRealizationSetCalculator(); |
| } |
| return signatureCalculator.calculateSignature(config, sqlResponse, project); |
| } |
| |
| private static Class getSignatureClass(KylinConfig config) { |
| try { |
| return Class.forName(config.getSQLResponseSignatureClass()); |
| } catch (ClassNotFoundException e) { |
| logger.warn("Will use default signature since cannot find class " + config.getSQLResponseSignatureClass()); |
| return FactTableRealizationSetCalculator.class; |
| } |
| } |
| } |