tachyon.master

Class RawTables

java.lang.Object

tachyon.master.ImageWriter

tachyon.master.RawTables

public class RawTables
extends ImageWriter

All Raw Table related info in MasterInfo.

Constructor Summary

Constructors

Constructor and Description
RawTables()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	addRawTable(int tableId, int columns, ByteBuffer metadata) Add a raw table.
boolean	delete(int tableId) Remove a raw table.
boolean	exist(int inodeId) Test if the raw table exist or not.
int	getColumns(int tableId) Get the number of the columns of a raw table.
ByteBuffer	getMetadata(int tableId) Get the metadata of the specified raw table.
Pair<Integer,ByteBuffer>	getTableInfo(int tableId) Get the raw table info.
void	updateMetadata(int tableId, ByteBuffer metadata) Update the metadata of the specified raw table.
void	writeImage(com.fasterxml.jackson.databind.ObjectWriter objWriter, DataOutputStream dos) Write image to the specified DataOutputStream.

Methods inherited from class tachyon.master.ImageWriter

writeElement

Methods inherited from class java.lang.Object

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

Constructor Detail

RawTables

public RawTables()

Method Detail

addRawTable

public boolean addRawTable(int tableId,
                  int columns,
                  ByteBuffer metadata)
                    throws TachyonException

Add a raw table. It will check if the raw table is already added.

Parameters:

tableId - The id of the raw table

columns - The number of columns in the raw table

metadata - The additional metadata of the raw table

Returns:

true if success, false otherwise

Throws:

TachyonException

delete

public boolean delete(int tableId)

Remove a raw table.

Parameters:

tableId - The id of the raw table

Returns:

true if success, false otherwise

exist

public boolean exist(int inodeId)

Test if the raw table exist or not.

Parameters:

inodeId - the raw table id.

Returns:

true if the table exists, false otherwise.

getColumns

public int getColumns(int tableId)

Get the number of the columns of a raw table.

Parameters:

tableId - the inode id of the raw table.

Returns:

the number of the columns, -1 if the table does not exist.

getMetadata

public ByteBuffer getMetadata(int tableId)

Get the metadata of the specified raw table. It will return a duplication.

Parameters:

tableId - The id of the raw table

Returns:

null if it has no metadata, or a duplication of the metadata

getTableInfo

public Pair<Integer,ByteBuffer> getTableInfo(int tableId)

Get the raw table info.

Parameters:

tableId - the raw table id.

Returns:

if the table exist, null otherwise.

updateMetadata

public void updateMetadata(int tableId,
                  ByteBuffer metadata)
                    throws TachyonException

Update the metadata of the specified raw table. It will check if the table exists.

Parameters:

tableId - The id of the raw table

metadata - The new metadata of the raw table

Throws:

TachyonException

writeImage

public void writeImage(com.fasterxml.jackson.databind.ObjectWriter objWriter,
              DataOutputStream dos)
                throws IOException

Description copied from class: ImageWriter

Write image to the specified DataOutputStream. Use the specified ObjectWriter.

Parameters:

objWriter - The used object writer

dos - The target data output stream

Throws:

IOException