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added the unit tests for incremental download of translog
This commit adds the unit tests applicable for the changes made to support incremental download of translog files. Primarily, the unit tests cover the changes in- - TranslogFooter to write and read the footer of Translog - RemoteFSTranslog to skip the download of locally present translog - TranslogWriter to create reader with checksum upon close - TranslogReader closeIntoReader functionality Signed-off-by: Harsh Rawat <[email protected]>
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Harsh Rawat
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Oct 9, 2024
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server/src/test/java/org/opensearch/index/translog/TranslogFooterTests.java
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| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
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| /* | ||
| * Licensed to Elasticsearch under one or more contributor | ||
| * license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright | ||
| * ownership. Elasticsearch 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. | ||
| */ | ||
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| /* | ||
| * Modifications Copyright OpenSearch Contributors. See | ||
| * GitHub history for details. | ||
| */ | ||
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| package org.opensearch.index.translog; | ||
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| import org.apache.lucene.codecs.CodecUtil; | ||
| import org.opensearch.common.UUIDs; | ||
| import org.opensearch.test.OpenSearchTestCase; | ||
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| import java.io.IOException; | ||
| import java.nio.ByteBuffer; | ||
| import java.nio.channels.FileChannel; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.StandardOpenOption; | ||
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| public class TranslogFooterTests extends OpenSearchTestCase { | ||
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| /** | ||
| * testTranslogFooterWrite verifies the functionality of TranslogFooter.write() method | ||
| * wherein we write the footer to the translog file. | ||
| * */ | ||
| public void testTranslogFooterWrite() throws IOException { | ||
| Path translogPath = createTempFile(); | ||
| try (FileChannel channel = FileChannel.open(translogPath, StandardOpenOption.WRITE)) { | ||
| // Write a translog header | ||
| TranslogHeader header = new TranslogHeader(UUIDs.randomBase64UUID(), randomNonNegativeLong()); | ||
| header.write(channel, true); | ||
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| // Write some translog operations | ||
| byte[] operationBytes = new byte[] { 1, 2, 3, 4 }; | ||
| channel.write(ByteBuffer.wrap(operationBytes)); | ||
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| // Write the translog footer | ||
| long expectedChecksum = 0x1234567890ABCDEFL; | ||
| byte[] footer = TranslogFooter.write(channel, expectedChecksum, true); | ||
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| // Verify the footer contents | ||
| ByteBuffer footerBuffer = ByteBuffer.wrap(footer); | ||
| assertEquals(CodecUtil.FOOTER_MAGIC, footerBuffer.getInt()); | ||
| assertEquals(0, footerBuffer.getInt()); | ||
| assertEquals(expectedChecksum, footerBuffer.getLong()); | ||
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| // Verify that the footer was written to the channel | ||
| assertEquals(footer.length, channel.size() - (header.sizeInBytes() + operationBytes.length)); | ||
| } | ||
| } | ||
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| /** | ||
| * testTranslogFooterReadChecksum verifies the behavior of the TranslogFooter.readChecksum() method, | ||
| * which reads the checksum from the footer of a translog file. | ||
| * */ | ||
| public void testTranslogFooterReadChecksum() throws IOException { | ||
| long expectedChecksum = 0x1234567890ABCDEFL; | ||
| Path translogPath = createTempFile(); | ||
| try (FileChannel channel = FileChannel.open(translogPath, StandardOpenOption.WRITE)) { | ||
| // Write a translog header | ||
| TranslogHeader header = new TranslogHeader(UUIDs.randomBase64UUID(), randomNonNegativeLong()); | ||
| header.write(channel, true); | ||
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| // Write some translog operations | ||
| byte[] operationBytes = new byte[] { 1, 2, 3, 4 }; | ||
| channel.write(ByteBuffer.wrap(operationBytes)); | ||
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| // Write the translog footer. | ||
| TranslogFooter.write(channel, expectedChecksum, true); | ||
| } | ||
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| // Verify that the checksum can be read correctly | ||
| Long actualChecksum = TranslogFooter.readChecksum(translogPath); | ||
| assert actualChecksum != null; | ||
| assertEquals(expectedChecksum, actualChecksum.longValue()); | ||
| } | ||
| } |
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