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 */
019package org.apache.reef.webserver;
020
021import org.apache.avro.io.DatumWriter;
022import org.apache.avro.io.EncoderFactory;
023import org.apache.avro.io.JsonEncoder;
024import org.apache.avro.specific.SpecificDatumWriter;
025import org.apache.reef.driver.evaluator.EvaluatorDescriptor;
026
027import javax.inject.Inject;
028import java.io.ByteArrayOutputStream;
029import java.io.IOException;
030import java.net.InetSocketAddress;
031import java.util.ArrayList;
032import java.util.List;
033import java.util.Map;
034
035/**
036 * Serialize Evaluator Info.
037 * It is the default implementation for interface EvaluatorInfoSerializer.
038 */
039public class AvroEvaluatorInfoSerializer implements EvaluatorInfoSerializer {
040
041  @Inject
042  AvroEvaluatorInfoSerializer() {
043  }
044
045  /**
046   * Create AvroEvaluatorsInfo object.
047   */
048  @Override
049  public AvroEvaluatorsInfo toAvro(
050      final List<String> ids, final Map<String, EvaluatorDescriptor> evaluators) {
051
052    final List<AvroEvaluatorInfo> evaluatorsInfo = new ArrayList<>();
053
054    for (final String id : ids) {
055
056      final EvaluatorDescriptor evaluatorDescriptor = evaluators.get(id);
057      String nodeId = null;
058      String nodeName = null;
059      InetSocketAddress address = null;
060      int memory = 0;
061      String type = null;
062
063      if (evaluatorDescriptor != null) {
064        nodeId = evaluatorDescriptor.getNodeDescriptor().getId();
065        nodeName = evaluatorDescriptor.getNodeDescriptor().getName();
066        address = evaluatorDescriptor.getNodeDescriptor().getInetSocketAddress();
067        memory = evaluatorDescriptor.getMemory();
068        type = evaluatorDescriptor.getType().toString();
069      }
070
071      evaluatorsInfo.add(AvroEvaluatorInfo.newBuilder()
072          .setEvaluatorId(id)
073          .setNodeId(nodeId != null ? nodeId : "")
074          .setNodeName(nodeName != null ? nodeName : "")
075          .setInternetAddress(address != null ? address.toString() : "")
076          .setMemory(memory)
077          .setType(type != null ? type : "")
078          .build());
079    }
080
081    return AvroEvaluatorsInfo.newBuilder()
082        .setEvaluatorsInfo(evaluatorsInfo)
083        .build();
084  }
085
086  /**
087   * Convert AvroEvaluatorsInfo object to JSON string
088   */
089  @Override
090  public String toString(final AvroEvaluatorsInfo avroEvaluatorsInfo) {
091    final DatumWriter<AvroEvaluatorsInfo> evaluatorWriter = new SpecificDatumWriter<>(AvroEvaluatorsInfo.class);
092    try (final ByteArrayOutputStream out = new ByteArrayOutputStream()) {
093      final JsonEncoder encoder = EncoderFactory.get().jsonEncoder(avroEvaluatorsInfo.getSchema(), out);
094      evaluatorWriter.write(avroEvaluatorsInfo, encoder);
095      encoder.flush();
096      return out.toString(AvroHttpSerializer.JSON_CHARSET);
097    } catch (final IOException e) {
098      throw new RuntimeException(e);
099    }
100  }
101}