| /** |
| * Copyright (c) 2016 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * Licensed 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 com.datatorrent.flume.storage; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.flume.Event; |
| import org.apache.flume.event.EventBuilder; |
| |
| import com.esotericsoftware.kryo.Kryo; |
| import com.esotericsoftware.kryo.io.Input; |
| import com.esotericsoftware.kryo.io.Output; |
| |
| import com.datatorrent.api.StreamCodec; |
| import com.datatorrent.netlet.util.Slice; |
| |
| /** |
| * <p>EventCodec class.</p> |
| * |
| * @author Chetan Narsude <chetan@datatorrent.com> |
| * @since 0.9.4 |
| */ |
| public class EventCodec implements StreamCodec<Event> |
| { |
| private final transient Kryo kryo; |
| |
| public EventCodec() |
| { |
| this.kryo = new Kryo(); |
| this.kryo.setClassLoader(Thread.currentThread().getContextClassLoader()); |
| } |
| |
| @Override |
| public Object fromByteArray(Slice fragment) |
| { |
| ByteArrayInputStream is = new ByteArrayInputStream(fragment.buffer, fragment.offset, fragment.length); |
| Input input = new Input(is); |
| |
| @SuppressWarnings("unchecked") |
| HashMap<String, String> headers = kryo.readObjectOrNull(input, HashMap.class); |
| byte[] body = kryo.readObjectOrNull(input, byte[].class); |
| return EventBuilder.withBody(body, headers); |
| } |
| |
| @Override |
| public Slice toByteArray(Event event) |
| { |
| ByteArrayOutputStream os = new ByteArrayOutputStream(); |
| Output output = new Output(os); |
| |
| Map<String, String> headers = event.getHeaders(); |
| if (headers != null && headers.getClass() != HashMap.class) { |
| HashMap<String, String> tmp = new HashMap<String, String>(headers.size()); |
| tmp.putAll(headers); |
| headers = tmp; |
| } |
| kryo.writeObjectOrNull(output, headers, HashMap.class); |
| kryo.writeObjectOrNull(output, event.getBody(), byte[].class); |
| output.flush(); |
| final byte[] bytes = os.toByteArray(); |
| return new Slice(bytes, 0, bytes.length); |
| } |
| |
| @Override |
| public int getPartition(Event o) |
| { |
| return o.hashCode(); |
| } |
| |
| private static final Logger logger = LoggerFactory.getLogger(EventCodec.class); |
| } |