| /* |
| * 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.commands; |
| |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.stream.Collectors; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.collect.AbstractIterator; |
| |
| import io.airlift.airline.Arguments; |
| import io.airlift.airline.Command; |
| import io.airlift.airline.Option; |
| import net.openhft.chronicle.core.io.Closeable; |
| import net.openhft.chronicle.queue.ChronicleQueue; |
| import net.openhft.chronicle.queue.impl.single.SingleChronicleQueueBuilder; |
| import net.openhft.chronicle.queue.ExcerptTailer; |
| import org.apache.cassandra.fqltool.FQLQueryIterator; |
| import org.apache.cassandra.fqltool.ResultHandler; |
| import org.apache.cassandra.fqltool.StoredResultSet; |
| |
| /** |
| */ |
| @Command(name = "compare", description = "Compare result files generated by fqltool replay") |
| public class Compare implements Runnable |
| { |
| @Arguments(usage = "<path1> [<path2>...<pathN>]", |
| description = "Directories containing result files to compare.", |
| required = true) |
| private List<String> arguments = new ArrayList<>(); |
| |
| @Option(title = "queries", |
| name = { "--queries"}, |
| description = "Directory to read the queries from. It is produced by the fqltool replay --store-queries option. ", |
| required = true) |
| private String querylog; |
| |
| @Override |
| public void run() |
| { |
| compare(querylog, arguments); |
| } |
| |
| public static void compare(String querylog, List<String> arguments) |
| { |
| List<ChronicleQueue> readQueues = null; |
| try (ResultHandler rh = new ResultHandler(arguments, null, null); |
| ChronicleQueue queryQ = SingleChronicleQueueBuilder.single(querylog).readOnly(true).build(); |
| FQLQueryIterator queries = new FQLQueryIterator(queryQ.createTailer(), 1)) |
| { |
| readQueues = arguments.stream().map(s -> SingleChronicleQueueBuilder.single(s).readOnly(true).build()).collect(Collectors.toList()); |
| List<Iterator<ResultHandler.ComparableResultSet>> its = readQueues.stream().map(q -> new StoredResultSetIterator(q.createTailer())).collect(Collectors.toList()); |
| while (queries.hasNext()) |
| rh.handleResults(queries.next(), resultSets(its)); |
| } |
| catch (Exception e) |
| { |
| throw new RuntimeException(e); |
| } |
| finally |
| { |
| if (readQueues != null) |
| readQueues.forEach(Closeable::close); |
| } |
| } |
| |
| @VisibleForTesting |
| public static List<ResultHandler.ComparableResultSet> resultSets(List<Iterator<ResultHandler.ComparableResultSet>> its) |
| { |
| List<ResultHandler.ComparableResultSet> resultSets = new ArrayList<>(its.size()); |
| for (Iterator<ResultHandler.ComparableResultSet> it : its) |
| { |
| if (it.hasNext()) |
| resultSets.add(it.next()); |
| else |
| resultSets.add(null); |
| } |
| return resultSets; |
| } |
| |
| @VisibleForTesting |
| public static class StoredResultSetIterator extends AbstractIterator<ResultHandler.ComparableResultSet> |
| { |
| private final ExcerptTailer tailer; |
| |
| public StoredResultSetIterator(ExcerptTailer tailer) |
| { |
| this.tailer = tailer; |
| } |
| |
| protected ResultHandler.ComparableResultSet computeNext() |
| { |
| StoredResultSet srs = StoredResultSet.fromTailer(tailer); |
| if (srs.hasMoreResultSets) |
| return srs; |
| return endOfData(); |
| } |
| } |
| |
| |
| } |