Package org.apache.hadoop.util

Class MachineList

java.lang.Object

org.apache.hadoop.util.MachineList

public class MachineList
extends Object

Container class which holds a list of ip/host addresses and answers membership queries. Accepts list of ip addresses, ip addreses in CIDR format and/or host addresses.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	MachineList.InetAddressFactory	InetAddressFactory is used to obtain InetAddress from host.

Field Summary

Fields

Modifier and Type	Field	Description
static final org.slf4j.Logger	LOG
static final String	WILDCARD_VALUE

Constructor Summary

Constructors

Constructor	Description
MachineList(String hostEntries)
MachineList(String hostEntries, MachineList.InetAddressFactory addressFactory)
MachineList(Collection<String> hostEntries)
MachineList(Collection<String> hostEntries, MachineList.InetAddressFactory addressFactory)	Accepts a collection of ip/cidr/host addresses

Method Summary

Modifier and Type	Method	Description
Collection<String>	getCollection()	returns the contents of the MachineList as a Collection<String> .
boolean	includes(String ipAddress)	Accepts an ip address and return true if ipAddress is in the list.
boolean	includes(InetAddress address)	Accepts an inet address and return true if address is in the list.

Methods inherited from class java.lang.Object

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

Field Details

LOG

public static final org.slf4j.Logger LOG

WILDCARD_VALUE

public static final String WILDCARD_VALUE

See Also:

• Constant Field Values

Constructor Details

MachineList

public MachineList(String hostEntries)

Parameters:

hostEntries - comma separated ip/cidr/host addresses

MachineList

public MachineList(String hostEntries,
 MachineList.InetAddressFactory addressFactory)

MachineList

public MachineList(Collection<String> hostEntries)

Parameters:

hostEntries - collection of separated ip/cidr/host addresses

MachineList

public MachineList(Collection<String> hostEntries,
 MachineList.InetAddressFactory addressFactory)

Accepts a collection of ip/cidr/host addresses

Parameters:

hostEntries - hostEntries.

addressFactory - addressFactory to convert host to InetAddress

Method Details

includes

public boolean includes(String ipAddress)

Accepts an ip address and return true if ipAddress is in the list. includes(InetAddress) should be preferred to avoid possibly re-resolving the ip address.

Parameters:

ipAddress - ipAddress.

Returns:

true if ipAddress is part of the list

includes

public boolean includes(InetAddress address)

Accepts an inet address and return true if address is in the list.

Parameters:

address - address.

Returns:

true if address is part of the list

getCollection

@VisibleForTesting
public Collection<String> getCollection()

returns the contents of the MachineList as a Collection<String> . This can be used for testing .

Returns:

contents of the MachineList.