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Source code
001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020package org.apache.reef.runtime.multi.utils;
021
022import org.apache.avro.io.*;
023import org.apache.avro.specific.SpecificDatumReader;
024import org.apache.avro.specific.SpecificDatumWriter;
025import org.apache.reef.runtime.multi.utils.avro.AvroMultiRuntimeDefinition;
026
027import java.io.ByteArrayOutputStream;
028import java.io.IOException;
029
030/**
031 * Serializer for MultiRuntimeDefinition.
032 */
033public final class MultiRuntimeDefinitionSerializer {
034
035  private static final String CHARSET_NAME = "UTF-8";
036
037  /**
038   * Serializes MultiRuntimeDefinition.
039   * @param runtimeDefinition the Avro object to toString
040   * @return Serialized avro string
041   */
042  public String toString(final AvroMultiRuntimeDefinition runtimeDefinition){
043    final DatumWriter<AvroMultiRuntimeDefinition> configurationWriter =
044            new SpecificDatumWriter<>(AvroMultiRuntimeDefinition.class);
045    final String serializedConfiguration;
046    try (final ByteArrayOutputStream out = new ByteArrayOutputStream()) {
047      final JsonEncoder encoder = EncoderFactory.get().jsonEncoder(runtimeDefinition.getSchema(), out);
048      configurationWriter.write(runtimeDefinition, encoder);
049      encoder.flush();
050      out.flush();
051      serializedConfiguration = out.toString(CHARSET_NAME);
052    } catch (final IOException e) {
053      throw new RuntimeException(e);
054    }
055
056    return serializedConfiguration;
057  }
058
059  /**
060   * Deserializes avro definition.
061   * @param serializedRuntimeDefinition serialized definition
062   * @return Avro object
063   * @throws IOException
064   */
065  public AvroMultiRuntimeDefinition fromString(final String serializedRuntimeDefinition) throws
066          IOException{
067    final JsonDecoder decoder = DecoderFactory.get().
068            jsonDecoder(AvroMultiRuntimeDefinition.getClassSchema(), serializedRuntimeDefinition);
069    final SpecificDatumReader<AvroMultiRuntimeDefinition> reader = new SpecificDatumReader<>(AvroMultiRuntimeDefinition
070            .class);
071    final AvroMultiRuntimeDefinition rd = reader.read(null, decoder);
072    return rd;
073  }
074}