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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.druid.indexer.hadoop;
import com.fasterxml.jackson.core.type.TypeReference;
import com.google.common.base.Preconditions;
import org.apache.druid.indexer.HadoopDruidIndexerConfig;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapreduce.InputSplit;
import javax.validation.constraints.NotNull;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.List;
public class DatasourceInputSplit extends InputSplit implements Writable
{
private static final String[] EMPTY_STR_ARRAY = new String[0];
private List<WindowedDataSegment> segments = null;
private String[] locations = null;
//required for deserialization
public DatasourceInputSplit()
{
}
public DatasourceInputSplit(@NotNull List<WindowedDataSegment> segments, String[] locations)
{
Preconditions.checkArgument(segments != null && segments.size() > 0, "no segments");
this.segments = segments;
this.locations = locations == null ? EMPTY_STR_ARRAY : locations;
}
@Override
public long getLength()
{
long size = 0;
for (WindowedDataSegment segment : segments) {
size += segment.getSegment().getSize();
}
return size;
}
@Override
public String[] getLocations()
{
return locations;
}
public List<WindowedDataSegment> getSegments()
{
return segments;
}
@Override
public void write(DataOutput out) throws IOException
{
final byte[] segmentsBytes = HadoopDruidIndexerConfig.JSON_MAPPER.writeValueAsBytes(segments);
out.writeInt(segmentsBytes.length);
out.write(segmentsBytes);
out.writeInt(locations.length);
for (String location : locations) {
out.writeUTF(location);
}
}
@Override
public void readFields(DataInput in) throws IOException
{
final int segmentsBytesLength = in.readInt();
final byte[] buf = new byte[segmentsBytesLength];
in.readFully(buf);
segments = HadoopDruidIndexerConfig.JSON_MAPPER.readValue(
buf,
new TypeReference<List<WindowedDataSegment>>()
{
}
);
locations = new String[in.readInt()];
for (int i = 0; i < locations.length; i++) {
locations[i] = in.readUTF();
}
}
}