org.apache.hadoop.fs
Class BlockLocation

java.lang.Object
  org.apache.hadoop.fs.BlockLocation

All Implemented Interfaces:

Writable

public class BlockLocation
extends Object
implements Writable

Constructor Summary

BlockLocation()
Default Constructor

BlockLocation(String[] names, String[] hosts, long offset, long length)
Constructor with host, name, offset and length

BlockLocation(String[] names, String[] hosts, String[] topologyPaths, long offset, long length)
Constructor with host, name, network topology, offset and length

Method Summary

String[]	getHosts() Get the list of hosts (hostname) hosting this block
long	getLength() Get the length of the block
String[]	getNames() Get the list of names (hostname:port) hosting this block
long	getOffset() Get the start offset of file associated with this block
String[]	getTopologyPaths() Get the list of network topology paths for each of the hosts.
void	readFields(DataInput in) Implement readFields of Writable
void	setHosts(String[] hosts) Set the hosts hosting this block
void	setLength(long length) Set the length of block
void	setNames(String[] names) Set the names (host:port) hosting this block
void	setOffset(long offset) Set the start offset of file associated with this block
void	setTopologyPaths(String[] topologyPaths) Set the network topology paths of the hosts
String	toString()
void	write(DataOutput out) Implement write of Writable

Methods inherited from class java.lang.Object

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

Constructor Detail

BlockLocation

public BlockLocation()

Default Constructor

BlockLocation

public BlockLocation(String[] names,
                     String[] hosts,
                     long offset,
                     long length)

Constructor with host, name, offset and length

BlockLocation

public BlockLocation(String[] names,
                     String[] hosts,
                     String[] topologyPaths,
                     long offset,
                     long length)

Constructor with host, name, network topology, offset and length

Method Detail

getHosts

public String[] getHosts()
                  throws IOException

Get the list of hosts (hostname) hosting this block

Throws:

IOException

getNames

public String[] getNames()
                  throws IOException

Get the list of names (hostname:port) hosting this block

Throws:

IOException

getTopologyPaths

public String[] getTopologyPaths()
                          throws IOException

Get the list of network topology paths for each of the hosts. The last component of the path is the host.

Throws:

IOException

getOffset

public long getOffset()

Get the start offset of file associated with this block

getLength

public long getLength()

Get the length of the block

setOffset

public void setOffset(long offset)

Set the start offset of file associated with this block

setLength

public void setLength(long length)

Set the length of block

setHosts

public void setHosts(String[] hosts)
              throws IOException

Set the hosts hosting this block

Throws:

IOException

setNames

public void setNames(String[] names)
              throws IOException

Set the names (host:port) hosting this block

Throws:

IOException

setTopologyPaths

public void setTopologyPaths(String[] topologyPaths)
                      throws IOException

Set the network topology paths of the hosts

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Implement write of Writable

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

Implement readFields of Writable

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object