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Add protobuf codegen decoder with unit tests
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32 changes: 32 additions & 0 deletions
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...-input-format/pinot-protobuf/src/main/java/com/google/protobuf/ProtobufInternalUtils.java
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| /** | ||
| * 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 com.google.protobuf; | ||
|
|
||
| public class ProtobufInternalUtils { | ||
| private ProtobufInternalUtils() { | ||
| } | ||
| /** | ||
| * The protocol buffer compiler generates a set of accessor methods for each field defined within the message in the | ||
| * .proto file. The method name is determined by converting the .proto names to camel case using the | ||
| * SchemaUtil.toCamelCase(). We need this to generate the method name to call. | ||
| */ | ||
| public static String underScoreToCamelCase(String name, boolean capNext) { | ||
| return SchemaUtil.toCamelCase(name, capNext); | ||
| } | ||
| } |
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...main/java/org/apache/pinot/plugin/inputformat/protobuf/ProtoBufCodeGenMessageDecoder.java
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| /** | ||
| * 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.pinot.plugin.inputformat.protobuf; | ||
|
|
||
| import com.google.common.base.Preconditions; | ||
| import com.google.protobuf.Descriptors; | ||
| import com.google.protobuf.Message; | ||
| import java.io.File; | ||
| import java.lang.reflect.InvocationTargetException; | ||
| import java.lang.reflect.Method; | ||
| import java.net.URL; | ||
| import java.net.URLClassLoader; | ||
| import java.util.Arrays; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
| import org.apache.pinot.plugin.inputformat.protobuf.codegen.MessageCodeGen; | ||
| import org.apache.pinot.spi.data.readers.GenericRow; | ||
| import org.apache.pinot.spi.stream.StreamMessageDecoder; | ||
| import org.codehaus.janino.SimpleCompiler; | ||
| import org.jetbrains.annotations.Nullable; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| public class ProtoBufCodeGenMessageDecoder implements StreamMessageDecoder<byte[]> { | ||
| private static final Logger LOGGER = | ||
| LoggerFactory.getLogger( | ||
| org.apache.pinot.plugin.inputformat.protobuf.ProtoBufCodeGenMessageDecoder.class); | ||
|
|
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| public static final String PROTOBUF_JAR_FILE_PATH = "jarFile"; | ||
| public static final String PROTO_CLASS_NAME = "protoClassName"; | ||
| public static final String EXTRACTOR_PACKAGE_NAME = "org.apache.pinot.plugin.inputformat.protobuf.decoder"; | ||
| public static final String EXTRACTOR_CLASS_NAME = "ProtobufRecorderMessageExtractor"; | ||
| public static final String EXTRACTOR_METHOD_NAME = "execute"; | ||
| private Class _recordExtractor = ProtoBufMessageDecoder.class; | ||
| private Method _decodeMethod; | ||
|
|
||
| @Override | ||
| public void init(Map<String, String> props, Set<String> fieldsToRead, String topicName) | ||
| throws Exception { | ||
| Preconditions.checkState( | ||
| props.containsKey(PROTOBUF_JAR_FILE_PATH), | ||
| "Protocol Buffer schema jar file must be provided"); | ||
| Preconditions.checkState( | ||
| props.containsKey(PROTO_CLASS_NAME), | ||
| "Protocol Buffer Message class name must be provided"); | ||
| String protoClassName = props.getOrDefault(PROTO_CLASS_NAME, ""); | ||
| String jarPath = props.getOrDefault(PROTOBUF_JAR_FILE_PATH, ""); | ||
| ClassLoader protoMessageClsLoader = loadClass(jarPath); | ||
| Descriptors.Descriptor descriptor = getDescriptorForProtoClass(protoMessageClsLoader, protoClassName); | ||
| String codeGenCode = new MessageCodeGen().codegen(descriptor, fieldsToRead); | ||
| _recordExtractor = compileClass( | ||
| protoMessageClsLoader, EXTRACTOR_PACKAGE_NAME + "." + EXTRACTOR_CLASS_NAME, codeGenCode); | ||
| _decodeMethod = _recordExtractor.getMethod(EXTRACTOR_METHOD_NAME, byte[].class, GenericRow.class); | ||
| } | ||
|
|
||
| @Nullable | ||
| @Override | ||
| public GenericRow decode(byte[] payload, GenericRow destination) { | ||
| try { | ||
| destination = (GenericRow) _decodeMethod.invoke(null, payload, destination); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| return destination; | ||
| } | ||
|
|
||
| @Nullable | ||
| @Override | ||
| public GenericRow decode(byte[] payload, int offset, int length, GenericRow destination) { | ||
| return decode(Arrays.copyOfRange(payload, offset, offset + length), destination); | ||
| } | ||
|
|
||
| public static ClassLoader loadClass(String jarFilePath) { | ||
| try { | ||
| File file = ProtoBufUtils.getFileCopiedToLocal(jarFilePath); | ||
| URL url = file.toURI().toURL(); | ||
| URL[] urls = new URL[] {url}; | ||
| return new URLClassLoader(urls); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException("Error loading protobuf class", e); | ||
| } | ||
| } | ||
|
|
||
| private Class compileClass(ClassLoader classloader, String className, String code) | ||
| throws ClassNotFoundException { | ||
| SimpleCompiler simpleCompiler = new SimpleCompiler(); | ||
| simpleCompiler.setParentClassLoader(classloader); | ||
| try { | ||
| simpleCompiler.cook(code); | ||
| } catch (Throwable t) { | ||
| System.out.println("Protobuf codegen compile error: \n" + code); | ||
| throw new RuntimeException( | ||
| "Program cannot be compiled. This is a bug. Please file an issue.", t); | ||
| } | ||
| return simpleCompiler.getClassLoader() | ||
| .loadClass(className); | ||
| } | ||
|
|
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| public static Descriptors.Descriptor getDescriptorForProtoClass(ClassLoader protoMessageClsLoader, | ||
| String protoClassName) | ||
| throws NoSuchMethodException, ClassNotFoundException, InvocationTargetException, IllegalAccessException { | ||
| Class<? extends Message> updateMessage = (Class<Message>) protoMessageClsLoader.loadClass(protoClassName); | ||
| return (Descriptors.Descriptor) updateMessage.getMethod("getDescriptor").invoke(null); | ||
| } | ||
| } |
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