| /* |
| * 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.flink.statefun.flink.core.message; |
| |
| import com.google.protobuf.ByteString; |
| import com.google.protobuf.InvalidProtocolBufferException; |
| import com.google.protobuf.Message; |
| import com.google.protobuf.Parser; |
| import it.unimi.dsi.fastutil.objects.ObjectOpenHashMap; |
| import java.util.Objects; |
| import javax.annotation.Nonnull; |
| import javax.annotation.concurrent.NotThreadSafe; |
| import org.apache.flink.statefun.flink.common.protobuf.ProtobufReflectionUtil; |
| import org.apache.flink.statefun.flink.core.generated.Payload; |
| |
| @NotThreadSafe |
| public class MessagePayloadSerializerPb implements MessagePayloadSerializer { |
| |
| private final ObjectOpenHashMap<String, ObjectOpenHashMap<ClassLoader, Parser<? extends Message>>> |
| PARSER_CACHE = new ObjectOpenHashMap<>(); |
| |
| @Override |
| public Object deserialize(@Nonnull ClassLoader targetClassLoader, @Nonnull Payload payload) { |
| try { |
| Parser<? extends Message> parser = |
| parserForClassName(targetClassLoader, payload.getClassName()); |
| return parser.parseFrom(payload.getPayloadBytes()); |
| } catch (InvalidProtocolBufferException | ClassNotFoundException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| @Override |
| public Payload serialize(@Nonnull Object what) { |
| final Message message = (Message) what; |
| final String className = what.getClass().getName(); |
| final ByteString body = message.toByteString(); |
| |
| return Payload.newBuilder().setClassName(className).setPayloadBytes(body).build(); |
| } |
| |
| @Override |
| public Object copy(@Nonnull ClassLoader targetClassLoader, @Nonnull Object what) { |
| Objects.requireNonNull(targetClassLoader); |
| if (!(what instanceof Message)) { |
| throw new IllegalStateException(); |
| } |
| Message message = (Message) what; |
| ByteString messageBytes = message.toByteString(); |
| try { |
| Parser<? extends Message> parser = |
| parserForClassName(targetClassLoader, what.getClass().getName()); |
| return parser.parseFrom(messageBytes); |
| } catch (InvalidProtocolBufferException | ClassNotFoundException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| private Parser<? extends Message> parserForClassName( |
| ClassLoader userCodeClassLoader, String messageClassName) throws ClassNotFoundException { |
| |
| ObjectOpenHashMap<ClassLoader, Parser<? extends Message>> classLoaders = |
| PARSER_CACHE.get(messageClassName); |
| if (classLoaders == null) { |
| PARSER_CACHE.put(messageClassName, classLoaders = new ObjectOpenHashMap<>()); |
| } |
| Parser<? extends Message> parser = classLoaders.get(userCodeClassLoader); |
| if (parser == null) { |
| classLoaders.put( |
| userCodeClassLoader, parser = findParser(userCodeClassLoader, messageClassName)); |
| } |
| return parser; |
| } |
| |
| private Parser<? extends Message> findParser( |
| ClassLoader userCodeClassLoader, String messageClassName) throws ClassNotFoundException { |
| Class<? extends Message> messageType = |
| Class.forName(messageClassName, true, userCodeClassLoader).asSubclass(Message.class); |
| |
| return ProtobufReflectionUtil.protobufParser(messageType); |
| } |
| } |