类 org.apache.hadoop.io.BytesWritable
的使用

使用BytesWritable的程序包

程序包	说明
org.apache.hadoop.io	Generic i/o code for use when reading and writing data to the network, to databases, and to files.
org.apache.hadoop.io.file.tfile
org.apache.hadoop.mapred	A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapreduce.lib.input
org.apache.hadoop.mapreduce.lib.output
org.apache.hadoop.streaming.io
org.apache.hadoop.typedbytes	Typed bytes are sequences of bytes in which the first byte is a type code.

org.apache.hadoop.io中BytesWritable的使用

参数类型为BytesWritable的org.apache.hadoop.io中的方法

限定符和类型	方法和说明
void	BytesWritable.set(BytesWritable newData) Set the BytesWritable to the contents of the given newData.

org.apache.hadoop.io.file.tfile中BytesWritable的使用

参数类型为BytesWritable的org.apache.hadoop.io.file.tfile中的方法

限定符和类型	方法和说明
void	TFile.Reader.Scanner.Entry.get(BytesWritable key, BytesWritable value) Copy the key and value in one shot into BytesWritables.
int	TFile.Reader.Scanner.Entry.getKey(BytesWritable key) Copy the key into BytesWritable.
long	TFile.Reader.Scanner.Entry.getValue(BytesWritable value) Copy the value into BytesWritable.

参数类型为BytesWritable的org.apache.hadoop.io.file.tfile中的构造器

构造器和说明
ByteArray(BytesWritable other) Constructing a ByteArray from a BytesWritable.

org.apache.hadoop.mapred中BytesWritable的使用

返回BytesWritable的org.apache.hadoop.mapred中的方法

限定符和类型	方法和说明
BytesWritable	SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader.createKey()
BytesWritable	SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader.createValue()

返回变量类型为BytesWritable的类型的org.apache.hadoop.mapred中的方法

限定符和类型	方法和说明
RecordReader<BytesWritable,BytesWritable>	SequenceFileAsBinaryInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)
RecordReader<BytesWritable,BytesWritable>	SequenceFileAsBinaryInputFormat.getRecordReader(InputSplit split, JobConf job, Reporter reporter)
RecordWriter<BytesWritable,BytesWritable>	SequenceFileAsBinaryOutputFormat.getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress)
RecordWriter<BytesWritable,BytesWritable>	SequenceFileAsBinaryOutputFormat.getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress)

参数类型为BytesWritable的org.apache.hadoop.mapred中的方法

限定符和类型	方法和说明
boolean	SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader.next(BytesWritable key, BytesWritable val) Read raw bytes from a SequenceFile.
void	SequenceFileAsBinaryOutputFormat.WritableValueBytes.reset(BytesWritable value)

参数类型为BytesWritable的org.apache.hadoop.mapred中的构造器

构造器和说明
SequenceFileAsBinaryOutputFormat.WritableValueBytes(BytesWritable value)

org.apache.hadoop.mapreduce.lib.input中BytesWritable的使用

返回BytesWritable的org.apache.hadoop.mapreduce.lib.input中的方法

限定符和类型	方法和说明
BytesWritable	SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader.getCurrentKey()
BytesWritable	SequenceFileAsBinaryInputFormat.SequenceFileAsBinaryRecordReader.getCurrentValue()

返回变量类型为BytesWritable的类型的org.apache.hadoop.mapreduce.lib.input中的方法

限定符和类型	方法和说明
RecordReader<BytesWritable,BytesWritable>	SequenceFileAsBinaryInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)
RecordReader<BytesWritable,BytesWritable>	SequenceFileAsBinaryInputFormat.createRecordReader(InputSplit split, TaskAttemptContext context)

org.apache.hadoop.mapreduce.lib.output中BytesWritable的使用

返回变量类型为BytesWritable的类型的org.apache.hadoop.mapreduce.lib.output中的方法

限定符和类型	方法和说明
RecordWriter<BytesWritable,BytesWritable>	SequenceFileAsBinaryOutputFormat.getRecordWriter(TaskAttemptContext context)
RecordWriter<BytesWritable,BytesWritable>	SequenceFileAsBinaryOutputFormat.getRecordWriter(TaskAttemptContext context)

参数类型为BytesWritable的org.apache.hadoop.mapreduce.lib.output中的方法

限定符和类型	方法和说明
void	SequenceFileAsBinaryOutputFormat.WritableValueBytes.reset(BytesWritable value)

参数类型为BytesWritable的org.apache.hadoop.mapreduce.lib.output中的构造器

构造器和说明
SequenceFileAsBinaryOutputFormat.WritableValueBytes(BytesWritable value)

org.apache.hadoop.streaming.io中BytesWritable的使用

返回BytesWritable的org.apache.hadoop.streaming.io中的方法

限定符和类型	方法和说明
BytesWritable	RawBytesOutputReader.getCurrentKey()
BytesWritable	RawBytesOutputReader.getCurrentValue()

org.apache.hadoop.typedbytes中BytesWritable的使用

org.apache.hadoop.typedbytes中BytesWritable的子类

限定符和类型	类和说明
class	TypedBytesWritable Writable for typed bytes.

返回BytesWritable的org.apache.hadoop.typedbytes中的方法

限定符和类型	方法和说明
BytesWritable	TypedBytesWritableInput.readBytes()
BytesWritable	TypedBytesWritableInput.readBytes(BytesWritable bw)

参数类型为BytesWritable的org.apache.hadoop.typedbytes中的方法

限定符和类型	方法和说明
BytesWritable	TypedBytesWritableInput.readBytes(BytesWritable bw)
void	TypedBytesWritableOutput.writeBytes(BytesWritable bw)