org.apache.accumulo.core.file.map
Class MySequenceFile.Writer

java.lang.Object
  org.apache.accumulo.core.file.map.MySequenceFile.Writer

All Implemented Interfaces:

java.io.Closeable

Enclosing class:

MySequenceFile

public static class MySequenceFile.Writer
extends java.lang.Object
implements java.io.Closeable

Write key/value pairs to a sequence-format file.

Field Summary

protected org.apache.hadoop.io.serializer.Serializer	compressedValSerializer
protected org.apache.hadoop.io.serializer.Serializer	keySerializer
protected org.apache.hadoop.io.serializer.Serializer	uncompressedValSerializer

Constructor Summary

MySequenceFile.Writer(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path name, java.lang.Class keyClass, java.lang.Class valClass)
Create the named file.

MySequenceFile.Writer(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path name, java.lang.Class keyClass, java.lang.Class valClass, int bufferSize, short replication, long blockSize, org.apache.hadoop.util.Progressable progress, MySequenceFile.Metadata metadata)
Create the named file with write-progress reporter.

MySequenceFile.Writer(org.apache.hadoop.fs.FileSystem fs, org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.fs.Path name, java.lang.Class keyClass, java.lang.Class valClass, org.apache.hadoop.util.Progressable progress, MySequenceFile.Metadata metadata)
Create the named file with write-progress reporter.

Method Summary

void	append(java.lang.Object key, java.lang.Object val) Append a key/value pair.
void	append(org.apache.hadoop.io.Writable key, org.apache.hadoop.io.Writable val) Append a key/value pair.
void	appendRaw(byte[] keyData, int keyOffset, int keyLength, MySequenceFile.ValueBytes val)
void	close() Close the file.
org.apache.hadoop.io.compress.CompressionCodec	getCompressionCodec() Returns the compression codec of data in this file.
java.lang.Class	getKeyClass() Returns the class of keys in this file.
long	getLength() Returns the current length of the output file.
java.lang.Class	getValueClass() Returns the class of values in this file.
void	sync() create a sync point

Methods inherited from class java.lang.Object

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

Field Detail

keySerializer

protected org.apache.hadoop.io.serializer.Serializer keySerializer

uncompressedValSerializer

protected org.apache.hadoop.io.serializer.Serializer uncompressedValSerializer

compressedValSerializer

protected org.apache.hadoop.io.serializer.Serializer compressedValSerializer

Constructor Detail

MySequenceFile.Writer

public MySequenceFile.Writer(org.apache.hadoop.fs.FileSystem fs,
                             org.apache.hadoop.conf.Configuration conf,
                             org.apache.hadoop.fs.Path name,
                             java.lang.Class keyClass,
                             java.lang.Class valClass)
                      throws java.io.IOException

Create the named file.

Throws:

java.io.IOException

MySequenceFile.Writer

public MySequenceFile.Writer(org.apache.hadoop.fs.FileSystem fs,
                             org.apache.hadoop.conf.Configuration conf,
                             org.apache.hadoop.fs.Path name,
                             java.lang.Class keyClass,
                             java.lang.Class valClass,
                             org.apache.hadoop.util.Progressable progress,
                             MySequenceFile.Metadata metadata)
                      throws java.io.IOException

Create the named file with write-progress reporter.

Throws:

java.io.IOException

MySequenceFile.Writer

public MySequenceFile.Writer(org.apache.hadoop.fs.FileSystem fs,
                             org.apache.hadoop.conf.Configuration conf,
                             org.apache.hadoop.fs.Path name,
                             java.lang.Class keyClass,
                             java.lang.Class valClass,
                             int bufferSize,
                             short replication,
                             long blockSize,
                             org.apache.hadoop.util.Progressable progress,
                             MySequenceFile.Metadata metadata)
                      throws java.io.IOException

Create the named file with write-progress reporter.

Throws:

java.io.IOException

Method Detail

getKeyClass

public java.lang.Class getKeyClass()

Returns the class of keys in this file.

getValueClass

public java.lang.Class getValueClass()

Returns the class of values in this file.

getCompressionCodec

public org.apache.hadoop.io.compress.CompressionCodec getCompressionCodec()

Returns the compression codec of data in this file.

sync

public void sync()
          throws java.io.IOException

create a sync point

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

Close the file.

Specified by:

close in interface java.io.Closeable

Throws:

java.io.IOException

append

public void append(org.apache.hadoop.io.Writable key,
                   org.apache.hadoop.io.Writable val)
            throws java.io.IOException

Append a key/value pair.

Throws:

java.io.IOException

append

public void append(java.lang.Object key,
                   java.lang.Object val)
            throws java.io.IOException

Append a key/value pair.

Throws:

java.io.IOException

appendRaw

public void appendRaw(byte[] keyData,
                      int keyOffset,
                      int keyLength,
                      MySequenceFile.ValueBytes val)
               throws java.io.IOException

Throws:

java.io.IOException

getLength

public long getLength()
               throws java.io.IOException

Returns the current length of the output file.

This always returns a synchronized position. In other words, immediately after calling MySequenceFile.Reader.seek(long) with a position returned by this method, MySequenceFile.Reader.next(Writable) may be called. However the key may be earlier in the file than key last written when this method was called (e.g., with block-compression, it may be the first key in the block that was being written when this method was called).

Throws:

java.io.IOException