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07e5741cbb
Implement toplevel class that reads in two database backups and displays diffs. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=168592124
67 lines
2.4 KiB
Java
67 lines
2.4 KiB
Java
// Copyright 2017 The Nomulus Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.tools;
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import com.google.common.collect.ImmutableSet;
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import com.google.common.collect.Sets;
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import com.google.common.collect.Sets.SetView;
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import java.io.File;
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/** Compare two database backups. */
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class CompareDbBackups {
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public static void main(String[] args) throws Exception {
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if (args.length != 2) {
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System.err.println("Usage: compare_db_backups <directory1> <directory2>");
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return;
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}
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ImmutableSet<ComparableEntity> entities1 =
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new RecordAccumulator().readDirectory(new File(args[0])).getComparableEntitySet();
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ImmutableSet<ComparableEntity> entities2 =
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new RecordAccumulator().readDirectory(new File(args[1])).getComparableEntitySet();
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// Calculate the entities added and removed.
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SetView<ComparableEntity> added = Sets.difference(entities2, entities1);
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SetView<ComparableEntity> removed = Sets.difference(entities1, entities2);
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printHeader(
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String.format("First backup: %d records", entities1.size()),
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String.format("Second backup: %d records", entities2.size()));
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if (!removed.isEmpty()) {
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printHeader(removed.size() + " records were removed:");
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for (ComparableEntity entity : removed) {
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System.out.println(entity);
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}
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}
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if (!added.isEmpty()) {
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printHeader(added.size() + " records were added:");
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for (ComparableEntity entity : added) {
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System.out.println(entity);
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}
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}
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}
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/** Print out multi-line text in a pretty ASCII header frame. */
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private static void printHeader(String... headerLines) {
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System.out.println("========================================================================");
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for (String line : headerLines) {
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System.out.println("| " + line);
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}
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System.out.println("========================================================================");
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}
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}
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