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Posted to issues@iceberg.apache.org by GitBox <gi...@apache.org> on 2022/05/31 13:06:04 UTC
[GitHub] [iceberg] nastra opened a new pull request, #4918: Core: Add InMemoryFileIO implementation
nastra opened a new pull request, #4918:
URL: https://github.com/apache/iceberg/pull/4918
This is a revival of https://github.com/apache/iceberg/pull/4054 to get this over the line. I also addressed review feedback and improved/changed a few other things.
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[GitHub] [iceberg] snazy commented on a diff in pull request #4918: Core: Add InMemoryFileIO implementation
Posted by GitBox <gi...@apache.org>.
snazy commented on code in PR #4918:
URL: https://github.com/apache/iceberg/pull/4918#discussion_r885645044
##########
core/src/main/java/org/apache/iceberg/io/inmemory/InMemoryFileStore.java:
##########
@@ -0,0 +1,69 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.nio.ByteBuffer;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentMap;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+import org.apache.iceberg.util.ByteBuffers;
+
+/** An in-memory collection based storage for file contents keyed by a string location. */
+class InMemoryFileStore {
+
+ private final ConcurrentMap<String, byte[]> store;
+
+ InMemoryFileStore() {
+ this.store = Maps.newConcurrentMap();
+ }
+
+ /** Put the file contents at the given location, overwrite if it already exists. */
+ public void put(String location, ByteBuffer data) {
+ // Copy the contents and store it.
+ store.put(location, ByteBuffers.toByteArray(data));
+ }
+
+ /** Get the file contents for the given location. */
+ public Optional<ByteBuffer> get(String location) {
+ return Optional.ofNullable(store.get(location))
+ .map(
+ bytes -> {
Review Comment:
You can store the `ByteBuffer` in `put()` using `ByteBuffer.asReadOnlyBuffer()` and then return just return `ByteBuffer.duplicate()` here instead of the byte[] copy + wrapping.
##########
core/src/main/java/org/apache/iceberg/io/inmemory/InMemoryFileStore.java:
##########
@@ -0,0 +1,69 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.nio.ByteBuffer;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentMap;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+import org.apache.iceberg.util.ByteBuffers;
+
+/** An in-memory collection based storage for file contents keyed by a string location. */
+class InMemoryFileStore {
Review Comment:
Maybe move the code from this class into `InMemoryFileIO` and make `InMemoryFileIO`'s inner classes top-level classes?
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[GitHub] [iceberg] nastra closed pull request #4918: Core: Add InMemoryFileIO implementation
Posted by "nastra (via GitHub)" <gi...@apache.org>.
nastra closed pull request #4918: Core: Add InMemoryFileIO implementation
URL: https://github.com/apache/iceberg/pull/4918
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[GitHub] [iceberg] kbendick commented on a diff in pull request #4918: Core: Add InMemoryFileIO implementation
Posted by GitBox <gi...@apache.org>.
kbendick commented on code in PR #4918:
URL: https://github.com/apache/iceberg/pull/4918#discussion_r912159458
##########
core/src/test/java/org/apache/iceberg/avro/TestAvroDeleteWriters.java:
##########
@@ -74,7 +75,7 @@ public void createDeleteRecords() {
@Test
public void testEqualityDeleteWriter() throws IOException {
- OutputFile out = new InMemoryOutputFile();
+ OutputFile out = new InMemoryFileIO().newOutputFile(UUID.randomUUID().toString());
Review Comment:
Same comment here about saving and reusing the `InMemoryFileIO`, especially as this class uses it multiple times.
##########
core/src/main/java/org/apache/iceberg/io/inmemory/InMemoryFileIO.java:
##########
@@ -0,0 +1,273 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import org.apache.iceberg.io.FileIO;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.io.PositionOutputStream;
+import org.apache.iceberg.io.SeekableInputStream;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.util.ByteBuffers;
+
+public class InMemoryFileIO implements FileIO {
+ private final InMemoryFileStore store;
+
+ public InMemoryFileIO() {
+ store = new InMemoryFileStore();
+ }
+
+ InMemoryFileStore getStore() {
Review Comment:
Nit: We tend not to use `get` in Iceberg. The logic behind that being that there’s either a more specific verb available (like `fetch` etc) or that the `get` is simply unneeded.
In this case for an accessor I think it’s simply not needed.
##########
core/src/test/java/org/apache/iceberg/TestScansAndSchemaEvolution.java:
##########
@@ -70,7 +70,8 @@ public TestScansAndSchemaEvolution(int formatVersion) {
private DataFile createDataFile(String partValue) throws IOException {
List<GenericData.Record> expected = RandomAvroData.generate(SCHEMA, 100, 0L);
- OutputFile dataFile = new InMemoryOutputFile(FileFormat.AVRO.addExtension(UUID.randomUUID().toString()));
+ OutputFile dataFile =
+ new InMemoryFileIO().newOutputFile(FileFormat.AVRO.addExtension(UUID.randomUUID().toString()));
Review Comment:
Should we store the `InMemoryFileIO` in its own variable so that the underlying `store` is only instantiated once?
##########
core/src/test/java/org/apache/iceberg/io/inmemory/InMemoryFileIOTest.java:
##########
@@ -0,0 +1,256 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.stream.IntStream;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.io.PositionOutputStream;
+import org.apache.iceberg.io.SeekableInputStream;
+import org.assertj.core.api.Assertions;
+import org.assertj.core.data.Offset;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+public class InMemoryFileIOTest {
+
+ private InMemoryFileIO fileIO;
+ private InMemoryFileStore store;
+
+ @BeforeEach
+ public void before() {
+ fileIO = new InMemoryFileIO();
+ store = fileIO.getStore();
+ }
+
+ @Test
+ public void testGetStore() {
+ Assertions.assertThat(store).isNotNull();
+ }
+
+ @Test
+ public void testDeleteFile() {
+ Assertions.assertThat(store.exists("file1")).isFalse();
+
+ // Create the file
+ store.put("file1", ByteBuffer.wrap(new byte[0]));
+ Assertions.assertThat(store.exists("file1")).isTrue();
+
+ // Delete the file
+ fileIO.deleteFile("file1");
+ // Verify that the file has been deleted
+ Assertions.assertThat(store.exists("file1")).isFalse();
+
+ Assertions.assertThatThrownBy(() -> fileIO.deleteFile("nonExisting"))
+ .isInstanceOf(IllegalArgumentException.class)
+ .hasMessage("File at location 'nonExisting' does not exist");
+ }
+
+ @Test
+ public void testNewInputFile() throws IOException {
+ String fileName = "file1";
+
+ store.put(fileName, ByteBuffer.wrap("data1".getBytes(UTF_8)));
+
+ InputFile inputFile = fileIO.newInputFile(fileName);
+ Assertions.assertThat(inputFile).isNotNull();
+
+ Assertions.assertThat(inputFile.exists()).isTrue();
+ Assertions.assertThat(inputFile.location()).isEqualTo(fileName);
+ Assertions.assertThat(inputFile.getLength()).isEqualTo(5);
+
+ try (SeekableInputStream inputStream = inputFile.newStream()) {
+ Assertions.assertThat(inputStream).isNotNull();
+
+ // Test read()
+ Assertions.assertThat(inputStream.getPos()).isEqualTo(0);
+ Assertions.assertThat(inputStream.read()).isEqualTo('d');
+
+ // Test read(byte[], index, len)
+ byte[] dataRead = new byte[3];
+ Assertions.assertThat(inputStream.read(dataRead, 0, 2)).isEqualTo(2);
+ Assertions.assertThat(new String(dataRead, 0, 2, UTF_8)).isEqualTo("at");
+ }
+ }
+
+ @Test
+ public void testSeek() throws IOException {
+ String fileName = "file1";
+
+ // Number of rows
+ int numRowsInChunk = 10;
+
+ // Emulate parquet file structure
+ ByteBuffer buffer = ByteBuffer.allocate(1024);
+ // Add magic number
+ buffer.put("par1".getBytes(UTF_8));
+ // Add column chunk 1 for int32
+ IntStream.range(0, numRowsInChunk).forEach(buffer::putInt);
+ // Add column chunk 2 for float64
+ IntStream.range(0, numRowsInChunk).forEach(buffer::putDouble);
+ // Add metadata footer (index to the start of chunks)
+ buffer.putInt(4);
+ buffer.putInt(4 + numRowsInChunk * 4);
+ // Add footer size
+ buffer.putInt(8);
+ // Add magic number
+ buffer.put("par1".getBytes(UTF_8));
+
+ // Put the data in the store
+ buffer.flip();
+ store.put(fileName, buffer);
+
+ // magic number, chunk1, chunk2, footer, footer size, magic number
+ int expectedFileSize = 4 + numRowsInChunk * 4 + numRowsInChunk * 8 + 8 + 4 + 4;
Review Comment:
Nit: Some of these might be better off as constants. But since it's all in the same method and we'll defined above I'm ok either way.
##########
core/src/main/java/org/apache/iceberg/io/inmemory/InMemoryFileIO.java:
##########
@@ -0,0 +1,273 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import org.apache.iceberg.io.FileIO;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.io.PositionOutputStream;
+import org.apache.iceberg.io.SeekableInputStream;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.util.ByteBuffers;
+
+public class InMemoryFileIO implements FileIO {
+ private final InMemoryFileStore store;
+
+ public InMemoryFileIO() {
+ store = new InMemoryFileStore();
+ }
+
+ InMemoryFileStore getStore() {
+ return store;
+ }
+
+ @Override
+ public InputFile newInputFile(String path) {
+ return new InMemoryInputFile(path);
+ }
+
+ @Override
+ public OutputFile newOutputFile(String path) {
+ return new InMemoryOutputFile(path);
+ }
+
+ @Override
+ public void deleteFile(String path) {
+ Preconditions.checkArgument(store.remove(path), "File at location '%s' does not exist", path);
+ }
+
+ private class InMemoryInputFile implements InputFile {
+ private final String location;
+
+ InMemoryInputFile(String location) {
+ this.location = location;
+ }
+
+ @Override
+ public long getLength() {
+ return getOrThrow().remaining();
+ }
+
+ @Override
+ public SeekableInputStream newStream() {
+ return new InMemorySeekableInputStream(getOrThrow().duplicate());
+ }
+
+ @Override
+ public String location() {
+ return location;
+ }
+
+ @Override
+ public boolean exists() {
+ return store.exists(location);
+ }
+
+ private ByteBuffer getOrThrow() {
Review Comment:
In this case, given that the `get` clearly lines up with the existing language and its private I feel it’s fine. 👍
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[GitHub] [iceberg] nastra commented on a diff in pull request #4918: Core: Add InMemoryFileIO implementation
Posted by GitBox <gi...@apache.org>.
nastra commented on code in PR #4918:
URL: https://github.com/apache/iceberg/pull/4918#discussion_r885699460
##########
core/src/main/java/org/apache/iceberg/io/inmemory/InMemoryFileStore.java:
##########
@@ -0,0 +1,69 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.nio.ByteBuffer;
+import java.util.Optional;
+import java.util.concurrent.ConcurrentMap;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+import org.apache.iceberg.util.ByteBuffers;
+
+/** An in-memory collection based storage for file contents keyed by a string location. */
+class InMemoryFileStore {
+
+ private final ConcurrentMap<String, byte[]> store;
+
+ InMemoryFileStore() {
+ this.store = Maps.newConcurrentMap();
+ }
+
+ /** Put the file contents at the given location, overwrite if it already exists. */
+ public void put(String location, ByteBuffer data) {
+ // Copy the contents and store it.
+ store.put(location, ByteBuffers.toByteArray(data));
+ }
+
+ /** Get the file contents for the given location. */
+ public Optional<ByteBuffer> get(String location) {
+ return Optional.ofNullable(store.get(location))
+ .map(
+ bytes -> {
Review Comment:
good point, done
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[GitHub] [iceberg] nastra commented on pull request #4918: Core: Add InMemoryFileIO implementation
Posted by "nastra (via GitHub)" <gi...@apache.org>.
nastra commented on PR #4918:
URL: https://github.com/apache/iceberg/pull/4918#issuecomment-1443106547
Closing this as we already have InMemoryFileIO in the codebase
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[GitHub] [iceberg] kbendick commented on a diff in pull request #4918: Core: Add InMemoryFileIO implementation
Posted by GitBox <gi...@apache.org>.
kbendick commented on code in PR #4918:
URL: https://github.com/apache/iceberg/pull/4918#discussion_r912162163
##########
core/src/test/java/org/apache/iceberg/io/inmemory/InMemoryFileIOTest.java:
##########
@@ -0,0 +1,256 @@
+/*
+ * 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.iceberg.io.inmemory;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.charset.StandardCharsets;
+import java.util.stream.IntStream;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.io.PositionOutputStream;
+import org.apache.iceberg.io.SeekableInputStream;
+import org.assertj.core.api.Assertions;
+import org.assertj.core.data.Offset;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+public class InMemoryFileIOTest {
+
+ private InMemoryFileIO fileIO;
+ private InMemoryFileStore store;
+
+ @BeforeEach
+ public void before() {
+ fileIO = new InMemoryFileIO();
+ store = fileIO.getStore();
+ }
+
+ @Test
+ public void testGetStore() {
+ Assertions.assertThat(store).isNotNull();
+ }
+
+ @Test
+ public void testDeleteFile() {
+ Assertions.assertThat(store.exists("file1")).isFalse();
+
+ // Create the file
+ store.put("file1", ByteBuffer.wrap(new byte[0]));
+ Assertions.assertThat(store.exists("file1")).isTrue();
+
+ // Delete the file
+ fileIO.deleteFile("file1");
+ // Verify that the file has been deleted
+ Assertions.assertThat(store.exists("file1")).isFalse();
+
+ Assertions.assertThatThrownBy(() -> fileIO.deleteFile("nonExisting"))
+ .isInstanceOf(IllegalArgumentException.class)
+ .hasMessage("File at location 'nonExisting' does not exist");
+ }
+
+ @Test
+ public void testNewInputFile() throws IOException {
+ String fileName = "file1";
+
+ store.put(fileName, ByteBuffer.wrap("data1".getBytes(UTF_8)));
+
+ InputFile inputFile = fileIO.newInputFile(fileName);
+ Assertions.assertThat(inputFile).isNotNull();
+
+ Assertions.assertThat(inputFile.exists()).isTrue();
+ Assertions.assertThat(inputFile.location()).isEqualTo(fileName);
+ Assertions.assertThat(inputFile.getLength()).isEqualTo(5);
+
+ try (SeekableInputStream inputStream = inputFile.newStream()) {
+ Assertions.assertThat(inputStream).isNotNull();
+
+ // Test read()
+ Assertions.assertThat(inputStream.getPos()).isEqualTo(0);
+ Assertions.assertThat(inputStream.read()).isEqualTo('d');
+
+ // Test read(byte[], index, len)
+ byte[] dataRead = new byte[3];
+ Assertions.assertThat(inputStream.read(dataRead, 0, 2)).isEqualTo(2);
+ Assertions.assertThat(new String(dataRead, 0, 2, UTF_8)).isEqualTo("at");
+ }
+ }
+
+ @Test
+ public void testSeek() throws IOException {
+ String fileName = "file1";
+
+ // Number of rows
+ int numRowsInChunk = 10;
+
+ // Emulate parquet file structure
+ ByteBuffer buffer = ByteBuffer.allocate(1024);
+ // Add magic number
+ buffer.put("par1".getBytes(UTF_8));
+ // Add column chunk 1 for int32
+ IntStream.range(0, numRowsInChunk).forEach(buffer::putInt);
+ // Add column chunk 2 for float64
+ IntStream.range(0, numRowsInChunk).forEach(buffer::putDouble);
+ // Add metadata footer (index to the start of chunks)
+ buffer.putInt(4);
+ buffer.putInt(4 + numRowsInChunk * 4);
+ // Add footer size
+ buffer.putInt(8);
+ // Add magic number
+ buffer.put("par1".getBytes(UTF_8));
+
+ // Put the data in the store
+ buffer.flip();
+ store.put(fileName, buffer);
+
+ // magic number, chunk1, chunk2, footer, footer size, magic number
+ int expectedFileSize = 4 + numRowsInChunk * 4 + numRowsInChunk * 8 + 8 + 4 + 4;
Review Comment:
Nit: Some of these might be better off as constants. But since it's all in the same method and well defined above I'm ok either way.
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