datafu.hourglass.avro
Class AvroKeyWithMetadataOutputFormat<T>

java.lang.Object
  org.apache.hadoop.mapreduce.OutputFormat<K,V>
      org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<K,V>
          org.apache.avro.mapreduce.AvroOutputFormatBase<org.apache.avro.mapred.AvroKey<T>,org.apache.hadoop.io.NullWritable>
              datafu.hourglass.avro.AvroKeyWithMetadataOutputFormat<T>

Type Parameters:

T - The (java) type of the Avro data to write.

public class AvroKeyWithMetadataOutputFormat<T>
extends org.apache.avro.mapreduce.AvroOutputFormatBase<org.apache.avro.mapred.AvroKey<T>,org.apache.hadoop.io.NullWritable>

FileOutputFormat for writing Avro container files.

Since Avro container files only contain records (not key/value pairs), this output format ignores the value.

Nested Class Summary

protected static class

AvroKeyWithMetadataOutputFormat.RecordWriterFactory<T> A factory for creating record writers.

Nested classes/interfaces inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.Counter

Field Summary

Fields inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

BASE_OUTPUT_NAME, PART

Constructor Summary

	AvroKeyWithMetadataOutputFormat() Constructor.
protected	AvroKeyWithMetadataOutputFormat(AvroKeyWithMetadataOutputFormat.RecordWriterFactory recordWriterFactory) Constructor.

Method Summary

org.apache.hadoop.mapreduce.RecordWriter<org.apache.avro.mapred.AvroKey<T>,org.apache.hadoop.io.NullWritable>

getRecordWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)

Methods inherited from class org.apache.avro.mapreduce.AvroOutputFormatBase

getAvroFileOutputStream, getCompressionCodec

Methods inherited from class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat

checkOutputSpecs, getCompressOutput, getDefaultWorkFile, getOutputCommitter, getOutputCompressorClass, getOutputName, getOutputPath, getPathForWorkFile, getUniqueFile, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputName, setOutputPath

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AvroKeyWithMetadataOutputFormat

public AvroKeyWithMetadataOutputFormat()

Constructor.

AvroKeyWithMetadataOutputFormat

protected AvroKeyWithMetadataOutputFormat(AvroKeyWithMetadataOutputFormat.RecordWriterFactory recordWriterFactory)

Constructor.

Parameters:

recordWriterFactory - A factory for creating record writers.

Method Detail

getRecordWriter

public org.apache.hadoop.mapreduce.RecordWriter<org.apache.avro.mapred.AvroKey<T>,org.apache.hadoop.io.NullWritable> getRecordWriter(org.apache.hadoop.mapreduce.TaskAttemptContext context)
                                                                                                                              throws java.io.IOException

Specified by:

getRecordWriter in class org.apache.hadoop.mapreduce.lib.output.FileOutputFormat<org.apache.avro.mapred.AvroKey<T>,org.apache.hadoop.io.NullWritable>

Throws:

java.io.IOException