| /* |
| * 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. |
| */ |
| |
| /** |
| * Copyright DataStax, Inc. |
| * <p> |
| * Please see the included license file for details. |
| */ |
| package org.apache.tinkerpop.gremlin.spark.structure.io.gryo.kryoshim.unshaded; |
| |
| import com.esotericsoftware.kryo.Kryo; |
| import com.esotericsoftware.kryo.io.Input; |
| import com.esotericsoftware.kryo.io.Output; |
| import org.apache.commons.configuration.BaseConfiguration; |
| import org.apache.commons.configuration.Configuration; |
| import org.apache.spark.SparkConf; |
| import org.apache.tinkerpop.gremlin.spark.structure.io.gryo.IoRegistryAwareKryoSerializer; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoPool; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.KryoShimService; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| public class UnshadedKryoShimService implements KryoShimService { |
| |
| private static final Logger log = LoggerFactory.getLogger(UnshadedKryoShimService.class); |
| |
| private static final LinkedBlockingQueue<Kryo> KRYOS = new LinkedBlockingQueue<>(); |
| |
| private static volatile boolean initialized; |
| |
| public UnshadedKryoShimService() { } |
| |
| @Override |
| public Object readClassAndObject(final InputStream source) { |
| |
| final LinkedBlockingQueue<Kryo> kryos = initialize(); |
| |
| Kryo k = null; |
| try { |
| k = kryos.take(); |
| |
| return k.readClassAndObject(new Input(source)); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } finally { |
| try { |
| kryos.put(k); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| @Override |
| public void writeClassAndObject(final Object o, OutputStream sink) { |
| |
| final LinkedBlockingQueue<Kryo> kryos = initialize(); |
| |
| Kryo k = null; |
| try { |
| k = kryos.take(); |
| |
| final Output kryoOutput = new Output(sink); |
| |
| k.writeClassAndObject(kryoOutput, o); |
| |
| kryoOutput.flush(); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } finally { |
| try { |
| kryos.put(k); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| @Override |
| public int getPriority() { |
| return -50; |
| } |
| |
| @Override |
| public void applyConfiguration(final Configuration conf) { |
| initialize(conf); |
| } |
| |
| private LinkedBlockingQueue<Kryo> initialize() { |
| return initialize(new BaseConfiguration()); |
| } |
| |
| private LinkedBlockingQueue<Kryo> initialize(final Configuration conf) { |
| // DCL is safe in this case due to volatility |
| if (!initialized) { |
| synchronized (UnshadedKryoShimService.class) { |
| if (!initialized) { |
| final SparkConf sparkConf = new SparkConf(); |
| |
| // Copy the user's IoRegistry from the param conf to the SparkConf we just created |
| final String regStr = conf.getString(GryoPool.CONFIG_IO_REGISTRY); |
| if (null != regStr) { // SparkConf rejects null values with NPE, so this has to be checked before set(...) |
| sparkConf.set(GryoPool.CONFIG_IO_REGISTRY, regStr); |
| } |
| // Setting spark.serializer here almost certainly isn't necessary, but it doesn't hurt |
| sparkConf.set("spark.serializer", IoRegistryAwareKryoSerializer.class.getCanonicalName()); |
| |
| final String registrator = conf.getString("spark.kryo.registrator"); |
| if (null != registrator) { |
| sparkConf.set("spark.kryo.registrator", registrator); |
| log.info("Copied spark.kryo.registrator: {}", registrator); |
| } else { |
| log.info("Not copying spark.kryo.registrator"); |
| } |
| |
| // Reuse Gryo poolsize for Kryo poolsize (no need to copy this to SparkConf) |
| final int poolSize = conf.getInt(GryoPool.CONFIG_IO_GRYO_POOL_SIZE, |
| GryoPool.CONFIG_IO_GRYO_POOL_SIZE_DEFAULT); |
| // Instantiate the spark.serializer |
| final IoRegistryAwareKryoSerializer ioReg = new IoRegistryAwareKryoSerializer(sparkConf); |
| // Setup a pool backed by our spark.serializer instance |
| |
| for (int i = 0; i < poolSize; i++) { |
| KRYOS.add(ioReg.newKryo()); |
| } |
| |
| initialized = true; |
| } |
| } |
| } |
| |
| return KRYOS; |
| } |
| } |