| /* |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.hive.spark; |
| |
| import com.esotericsoftware.kryo.Kryo; |
| import com.esotericsoftware.kryo.Serializer; |
| import com.esotericsoftware.kryo.io.Input; |
| import com.esotericsoftware.kryo.io.Output; |
| import org.apache.hadoop.hive.ql.io.HiveKey; |
| import org.apache.hadoop.io.BytesWritable; |
| import org.apache.spark.serializer.KryoRegistrator; |
| |
| /** |
| * Kryo registrator for shuffle data, i.e. HiveKey and BytesWritable. |
| * |
| * Active use (e.g. reflection to get a class instance) of this class on hive side can cause |
| * problems because kryo is relocated in hive-exec. |
| */ |
| public class HiveKryoRegistrator implements KryoRegistrator { |
| @Override |
| public void registerClasses(Kryo kryo) { |
| kryo.register(HiveKey.class, new HiveKeySerializer()); |
| kryo.register(BytesWritable.class, new BytesWritableSerializer()); |
| } |
| |
| private static class HiveKeySerializer extends Serializer<HiveKey> { |
| |
| public void write(Kryo kryo, Output output, HiveKey object) { |
| output.writeVarInt(object.getLength(), true); |
| output.write(object.getBytes(), 0, object.getLength()); |
| output.writeVarInt(object.hashCode(), false); |
| } |
| |
| public HiveKey read(Kryo kryo, Input input, Class<HiveKey> type) { |
| int len = input.readVarInt(true); |
| byte[] bytes = new byte[len]; |
| input.readBytes(bytes); |
| return new HiveKey(bytes, input.readVarInt(false)); |
| } |
| } |
| |
| private static class BytesWritableSerializer extends Serializer<BytesWritable> { |
| |
| public void write(Kryo kryo, Output output, BytesWritable object) { |
| output.writeVarInt(object.getLength(), true); |
| output.write(object.getBytes(), 0, object.getLength()); |
| } |
| |
| public BytesWritable read(Kryo kryo, Input input, Class<BytesWritable> type) { |
| int len = input.readVarInt(true); |
| byte[] bytes = new byte[len]; |
| input.readBytes(bytes); |
| return new BytesWritable(bytes); |
| } |
| |
| } |
| } |