org.apache.avro.mapreduce
Class AvroKeyOutputFormat<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<AvroKey<T>,org.apache.hadoop.io.NullWritable>
              org.apache.avro.mapreduce.AvroKeyOutputFormat<T>

Type Parameters:

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

public class AvroKeyOutputFormat<T>
extends AvroOutputFormatBase<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

AvroKeyOutputFormat.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

Constructor Summary

	AvroKeyOutputFormat() Constructor.
protected	AvroKeyOutputFormat(AvroKeyOutputFormat.RecordWriterFactory recordWriterFactory) Constructor.

Method Summary

org.apache.hadoop.mapreduce.RecordWriter<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, getOutputPath, getPathForWorkFile, getUniqueFile, getWorkOutputPath, setCompressOutput, setOutputCompressorClass, setOutputPath

Methods inherited from class java.lang.Object

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

Constructor Detail

AvroKeyOutputFormat

public AvroKeyOutputFormat()

Constructor.

AvroKeyOutputFormat

protected AvroKeyOutputFormat(AvroKeyOutputFormat.RecordWriterFactory recordWriterFactory)

Constructor.

Parameters:

recordWriterFactory - A factory for creating record writers.

Method Detail

getRecordWriter

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

Specified by:

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

Throws:

IOException