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HDFSWritableSerializer.java
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HDFSWritableSerializer.java
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/**
* 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.flume.sink.hdfs;
import org.apache.flume.Context;
import org.apache.flume.Event;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.LongWritable;
import java.util.Collections;
public class HDFSWritableSerializer implements SequenceFileSerializer {
private BytesWritable makeByteWritable(Event e) {
BytesWritable bytesObject = new BytesWritable();
bytesObject.set(e.getBody(), 0, e.getBody().length);
return bytesObject;
}
@Override
public Class<LongWritable> getKeyClass() {
return LongWritable.class;
}
@Override
public Class<BytesWritable> getValueClass() {
return BytesWritable.class;
}
@Override
public Iterable<Record> serialize(Event e) {
Object key = getKey(e);
Object value = getValue(e);
return Collections.singletonList(new Record(key, value));
}
private Object getKey(Event e) {
String timestamp = e.getHeaders().get("timestamp");
long eventStamp;
if (timestamp == null) {
eventStamp = System.currentTimeMillis();
} else {
eventStamp = Long.valueOf(timestamp);
}
return new LongWritable(eventStamp);
}
private Object getValue(Event e) {
return makeByteWritable(e);
}
public static class Builder implements SequenceFileSerializer.Builder {
@Override
public SequenceFileSerializer build(Context context) {
return new HDFSWritableSerializer();
}
}
}