| /* |
| * 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.samza.serializers; |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.samza.metrics.reporter.MetricsSnapshot; |
| import org.codehaus.jackson.map.ObjectMapper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| public class MetricsSnapshotSerdeV2 implements Serde<MetricsSnapshot> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(MetricsSnapshotSerdeV2.class); |
| private final ObjectMapper objectMapper; |
| |
| public MetricsSnapshotSerdeV2() { |
| objectMapper = new ObjectMapper(); |
| objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.OBJECT_AND_NON_CONCRETE); |
| } |
| |
| @Override |
| public MetricsSnapshot fromBytes(byte[] bytes) { |
| try { |
| return MetricsSnapshot.fromMap( |
| objectMapper.readValue(bytes, new HashMap<String, Map<String, Object>>().getClass())); |
| } catch (IOException e) { |
| LOG.info("Exception while deserializing", e); |
| } |
| return null; |
| } |
| |
| @Override |
| public byte[] toBytes(MetricsSnapshot metricsSnapshot) { |
| try { |
| return objectMapper.writeValueAsString(convertMap(metricsSnapshot.getAsMap())).getBytes("UTF-8"); |
| } catch (IOException e) { |
| LOG.info("Exception while serializing", e); |
| } |
| return null; |
| } |
| |
| /** Metrics returns an UnmodifiableMap. |
| * Unmodifiable maps should not be serialized with type, because UnmodifiableMap cannot be deserialized. |
| * So we convert to HashMap. |
| */ |
| private HashMap convertMap(Map<String, Object> map) { |
| HashMap retVal = new HashMap(map); |
| for (Map.Entry<String, Object> entry : map.entrySet()) { |
| if (entry.getValue() instanceof Map) { |
| retVal.put(entry.getKey(), convertMap((Map<String, Object>) entry.getValue())); |
| } |
| } |
| return retVal; |
| } |
| } |