| /** |
| * 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.apex.malhar.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> |
| * |
| * @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); |
| } |