Github user jasobrown commented on a diff in the pull request:
https://github.com/apache/cassandra/pull/256#discussion_r214221005
--- Diff: src/java/org/apache/cassandra/tools/fqltool/commands/Compare.java
---
@@ -0,0 +1,124 @@
+/*
+ * 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.tools.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.ChronicleQueueBuilder;
+import net.openhft.chronicle.queue.ExcerptTailer;
+import org.apache.cassandra.tools.fqltool.FQLQueryIterator;
+import org.apache.cassandra.tools.fqltool.ResultHandler;
+import org.apache.cassandra.tools.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 = "Where
to read the queries - should be produced by the replay command --store-queries
to make sure they are in the same order")
+ private String querylog;
+
+ @Override
+ public void run()
+ {
+ try
--- End diff --
petty nit: probably don't need to wrap `compare{}` in a try/catch as that
method already catches all exceptions (and wraps them in a `RuntimeException`
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