| /* |
| * 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.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.Configuration; |
| import org.apache.spark.SparkConf; |
| import org.apache.spark.serializer.KryoSerializer; |
| import org.apache.tinkerpop.gremlin.spark.structure.Spark; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.GryoPool; |
| import org.apache.tinkerpop.gremlin.structure.io.gryo.kryoshim.KryoShimService; |
| |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| public class UnshadedKryoShimService implements KryoShimService { |
| |
| private static final LinkedBlockingQueue<Kryo> KRYOS = new LinkedBlockingQueue<>(); |
| private static volatile boolean INITIALIZED; |
| |
| @Override |
| public Object readClassAndObject(final InputStream inputStream) { |
| Kryo k = null; |
| try { |
| k = KRYOS.take(); |
| return k.readClassAndObject(new Input(inputStream)); |
| } catch (final InterruptedException e) { |
| throw new IllegalStateException(e); |
| } finally { |
| try { |
| KRYOS.put(k); |
| } catch (final InterruptedException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| } |
| |
| @Override |
| public void writeClassAndObject(final Object object, OutputStream outputStream) { |
| Kryo k = null; |
| try { |
| k = KRYOS.take(); |
| final Output kryoOutput = new Output(outputStream); |
| k.writeClassAndObject(kryoOutput, object); |
| kryoOutput.flush(); |
| } catch (final InterruptedException e) { |
| throw new IllegalStateException(e); |
| } finally { |
| try { |
| KRYOS.put(k); |
| } catch (final InterruptedException e) { |
| throw new IllegalStateException(e); |
| } |
| } |
| } |
| |
| @Override |
| public int getPriority() { |
| return -50; |
| } |
| |
| @Override |
| public void applyConfiguration(final Configuration configuration) { |
| initialize(configuration); |
| } |
| |
| @Override |
| public void close() { |
| INITIALIZED = false; |
| KRYOS.clear(); |
| } |
| |
| private LinkedBlockingQueue<Kryo> initialize(final Configuration configuration) { |
| // DCL is safe in this case due to volatility |
| if (!INITIALIZED) { |
| synchronized (UnshadedKryoShimService.class) { |
| if (!INITIALIZED) { |
| // so we don't get a WARN that a new configuration is being created within an active context |
| final SparkConf sparkConf = null == Spark.getContext() ? new SparkConf() : Spark.getContext().getConf().clone(); |
| configuration.getKeys().forEachRemaining(key -> sparkConf.set(key, configuration.getProperty(key).toString())); |
| final KryoSerializer serializer = new KryoSerializer(sparkConf); |
| // Setup a pool backed by our spark.serializer instance |
| // Reuse Gryo poolsize for Kryo poolsize (no need to copy this to SparkConf) |
| KRYOS.clear(); |
| final int poolSize = configuration.getInt(GryoPool.CONFIG_IO_GRYO_POOL_SIZE, GryoPool.CONFIG_IO_GRYO_POOL_SIZE_DEFAULT); |
| for (int i = 0; i < poolSize; i++) { |
| KRYOS.add(serializer.newKryo()); |
| } |
| INITIALIZED = true; |
| } |
| } |
| } |
| |
| return KRYOS; |
| } |
| } |