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From GitBox <...@apache.org>
Subject [GitHub] [incubator-hudi] vinothchandar commented on a change in pull request #1176: [HUDI-430] Adding InlineFileSystem to support embedding any file format as an InlineFile
Date Mon, 16 Mar 2020 22:15:33 GMT
vinothchandar commented on a change in pull request #1176: [HUDI-430] Adding InlineFileSystem
to support embedding any file format as an InlineFile
URL: https://github.com/apache/incubator-hudi/pull/1176#discussion_r393336968
 
 

 ##########
 File path: hudi-utilities/src/test/java/org/apache/hudi/utilities/inline/fs/TestHFileReadWriteFlow.java
 ##########
 @@ -0,0 +1,243 @@
+/*
+ * 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.hudi.utilities.inline.fs;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataInputStream;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.hbase.HConstants;
+import org.apache.hadoop.hbase.KeyValue;
+import org.apache.hadoop.hbase.io.hfile.CacheConfig;
+import org.apache.hadoop.hbase.io.hfile.HFile;
+import org.apache.hadoop.hbase.io.hfile.HFileContext;
+import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
+import org.apache.hadoop.hbase.io.hfile.HFileScanner;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.UUID;
+
+import static org.apache.hudi.utilities.inline.fs.FileSystemTestUtils.FILE_SCHEME;
+import static org.apache.hudi.utilities.inline.fs.FileSystemTestUtils.RANDOM;
+import static org.apache.hudi.utilities.inline.fs.FileSystemTestUtils.getPhantomFile;
+import static org.apache.hudi.utilities.inline.fs.FileSystemTestUtils.getRandomOuterInMemPath;
+
+/**
+ * Tests {@link InlineFileSystem} using HFile writer and reader.
+ */
+public class TestHFileReadWriteFlow {
+
+  private final Configuration inMemoryConf;
+  private final Configuration inlineConf;
+  private final int minBlockSize = 1024;
+  private static final String LOCAL_FORMATTER = "%010d";
+  private int maxRows = 100 + RANDOM.nextInt(1000);
+  private Path generatedPath;
+
+  public TestHFileReadWriteFlow() {
+    inMemoryConf = new Configuration();
+    inMemoryConf.set("fs." + InMemoryFileSystem.SCHEME + ".impl", InMemoryFileSystem.class.getName());
+    inlineConf = new Configuration();
+    inlineConf.set("fs." + InlineFileSystem.SCHEME + ".impl", InlineFileSystem.class.getName());
+  }
+
+  @After
+  public void teardown() throws IOException {
+    if (generatedPath != null) {
+      File filePath = new File(generatedPath.toString().substring(generatedPath.toString().indexOf(':')
+ 1));
+      if (filePath.exists()) {
+        FileSystemTestUtils.deleteFile(filePath);
+      }
+    }
+  }
+
+  @Test
+  public void testSimpleInlineFileSystem() throws IOException {
+    Path outerInMemFSPath = getRandomOuterInMemPath();
+    Path outerPath = new Path(FILE_SCHEME + outerInMemFSPath.toString().substring(outerInMemFSPath.toString().indexOf(':')));
+    generatedPath = outerPath;
+    CacheConfig cacheConf = new CacheConfig(inMemoryConf);
+    FSDataOutputStream fout = createFSOutput(outerInMemFSPath, inMemoryConf);
+    HFileContext meta = new HFileContextBuilder()
+        .withBlockSize(minBlockSize)
+        .build();
+    HFile.Writer writer = HFile.getWriterFactory(inMemoryConf, cacheConf)
+        .withOutputStream(fout)
+        .withFileContext(meta)
+        .withComparator(new KeyValue.KVComparator())
+        .create();
+
+    writeRecords(writer);
+    fout.close();
+
+    byte[] inlineBytes = getBytesToInline(outerInMemFSPath);
+    long startOffset = generateOuterFile(outerPath, inlineBytes);
+
+    long inlineLength = inlineBytes.length;
+
+    // Generate phantom inline file
+    Path inlinePath = getPhantomFile(outerPath, startOffset, inlineLength);
+
+    InlineFileSystem inlineFileSystem = (InlineFileSystem) inlinePath.getFileSystem(inlineConf);
+    FSDataInputStream fin = inlineFileSystem.open(inlinePath);
+
+    HFile.Reader reader = HFile.createReader(inlineFileSystem, inlinePath, cacheConf, inlineConf);
+    // Load up the index.
+    reader.loadFileInfo();
+    // Get a scanner that caches and that does not use pread.
+    HFileScanner scanner = reader.getScanner(true, false);
+    // Align scanner at start of the file.
+    scanner.seekTo();
+    readAllRecords(scanner);
+
+    Set<Integer> rowIdsToSearch = getRandomValidRowIds(10);
+    for (int rowId : rowIdsToSearch) {
+      Assert.assertTrue("location lookup failed",
+          scanner.seekTo(KeyValue.createKeyValueFromKey(getSomeKey(rowId))) == 0);
+      // read the key and see if it matches
+      ByteBuffer readKey = scanner.getKey();
+      Assert.assertTrue("seeked key does not match", Arrays.equals(getSomeKey(rowId),
+          Bytes.toBytes(readKey)));
+      scanner.seekTo(KeyValue.createKeyValueFromKey(getSomeKey(rowId)));
+      ByteBuffer val1 = scanner.getValue();
+      scanner.seekTo(KeyValue.createKeyValueFromKey(getSomeKey(rowId)));
+      ByteBuffer val2 = scanner.getValue();
+      Assert.assertTrue(Arrays.equals(Bytes.toBytes(val1), Bytes.toBytes(val2)));
+    }
+
+    int[] invalidRowIds = {-4, maxRows, maxRows + 1, maxRows + 120, maxRows + 160, maxRows
+ 1000};
+    for (int rowId : invalidRowIds) {
+      Assert.assertFalse("location lookup should have failed",
+          scanner.seekTo(KeyValue.createKeyValueFromKey(getSomeKey(rowId))) == 0);
+    }
+    reader.close();
+    fin.close();
+    outerPath.getFileSystem(inMemoryConf).delete(outerPath, true);
+  }
+
+  private Set<Integer> getRandomValidRowIds(int count) {
+    Set<Integer> rowIds = new HashSet<>();
+    while (rowIds.size() < count) {
+      int index = RANDOM.nextInt(maxRows);
+      if (!rowIds.contains(index)) {
+        rowIds.add(index);
+      }
+    }
+    return rowIds;
+  }
+
+  private byte[] getSomeKey(int rowId) {
+    KeyValue kv = new KeyValue(String.format(LOCAL_FORMATTER, Integer.valueOf(rowId)).getBytes(),
+        Bytes.toBytes("family"), Bytes.toBytes("qual"), HConstants.LATEST_TIMESTAMP, KeyValue.Type.Put);
+    return kv.getKey();
+  }
+
+  private FSDataOutputStream createFSOutput(Path name, Configuration conf) throws IOException
{
+    //if (fs.exists(name)) fs.delete(name, true);
 
 Review comment:
   remove?

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