| /* |
| * 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.cassandra.fqltool; |
| |
| |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.UUID; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class ResultComparator |
| { |
| private static final Logger logger = LoggerFactory.getLogger(ResultComparator.class); |
| private final MismatchListener mismatchListener; |
| |
| public ResultComparator() |
| { |
| this(null); |
| } |
| |
| public ResultComparator(MismatchListener mismatchListener) |
| { |
| this.mismatchListener = mismatchListener; |
| } |
| /** |
| * Compares the rows in rows |
| * the row at position x in rows will have come from host at position x in targetHosts |
| */ |
| public boolean compareRows(List<String> targetHosts, FQLQuery query, List<ResultHandler.ComparableRow> rows) |
| { |
| if (rows.size() < 2 || rows.stream().allMatch(Objects::isNull)) |
| return true; |
| |
| if (rows.stream().anyMatch(Objects::isNull)) |
| { |
| handleMismatch(targetHosts, query, rows); |
| return false; |
| } |
| |
| ResultHandler.ComparableRow ref = rows.get(0); |
| boolean equal = true; |
| for (int i = 1; i < rows.size(); i++) |
| { |
| ResultHandler.ComparableRow compare = rows.get(i); |
| if (!ref.equals(compare)) |
| equal = false; |
| } |
| if (!equal) |
| handleMismatch(targetHosts, query, rows); |
| return equal; |
| } |
| |
| /** |
| * Compares the column definitions |
| * |
| * the column definitions at position x in cds will have come from host at position x in targetHosts |
| */ |
| public boolean compareColumnDefinitions(List<String> targetHosts, FQLQuery query, List<ResultHandler.ComparableColumnDefinitions> cds) |
| { |
| if (cds.size() < 2) |
| return true; |
| |
| boolean equal = true; |
| List<ResultHandler.ComparableDefinition> refDefs = cds.get(0).asList(); |
| for (int i = 1; i < cds.size(); i++) |
| { |
| List<ResultHandler.ComparableDefinition> toCompare = cds.get(i).asList(); |
| if (!refDefs.equals(toCompare)) |
| equal = false; |
| } |
| if (!equal) |
| handleColumnDefMismatch(targetHosts, query, cds); |
| return equal; |
| } |
| |
| private void handleMismatch(List<String> targetHosts, FQLQuery query, List<ResultHandler.ComparableRow> rows) |
| { |
| UUID mismatchUUID = UUID.randomUUID(); |
| StringBuilder sb = new StringBuilder("{} - MISMATCH Query = {} "); |
| for (int i = 0; i < targetHosts.size(); i++) |
| sb.append("mismatch").append(i) |
| .append('=') |
| .append('"').append(targetHosts.get(i)).append(':').append(rows.get(i)).append('"') |
| .append(','); |
| |
| logger.warn(sb.toString(), mismatchUUID, query); |
| try |
| { |
| if (mismatchListener != null) |
| mismatchListener.mismatch(mismatchUUID, targetHosts, query, rows); |
| } |
| catch (Throwable t) |
| { |
| logger.error("ERROR notifying listener", t); |
| } |
| } |
| |
| private void handleColumnDefMismatch(List<String> targetHosts, FQLQuery query, List<ResultHandler.ComparableColumnDefinitions> cds) |
| { |
| UUID mismatchUUID = UUID.randomUUID(); |
| StringBuilder sb = new StringBuilder("{} - COLUMN DEFINITION MISMATCH Query = {} "); |
| for (int i = 0; i < targetHosts.size(); i++) |
| sb.append("mismatch").append(i) |
| .append('=') |
| .append('"').append(targetHosts.get(i)).append(':').append(columnDefinitionsString(cds.get(i))).append('"') |
| .append(','); |
| |
| logger.warn(sb.toString(), mismatchUUID, query); |
| try |
| { |
| if (mismatchListener != null) |
| mismatchListener.columnDefMismatch(mismatchUUID, targetHosts, query, cds); |
| } |
| catch (Throwable t) |
| { |
| logger.error("ERROR notifying listener", t); |
| } |
| } |
| |
| private String columnDefinitionsString(ResultHandler.ComparableColumnDefinitions cd) |
| { |
| StringBuilder sb = new StringBuilder(); |
| if (cd == null) |
| sb.append("NULL"); |
| else if (cd.wasFailed()) |
| sb.append("FAILED"); |
| else |
| { |
| for (ResultHandler.ComparableDefinition def : cd) |
| { |
| sb.append(def.toString()); |
| } |
| } |
| return sb.toString(); |
| } |
| } |