org.minidns.record

Class SRV

java.lang.Object

org.minidns.record.Data

org.minidns.record.SRV

All Implemented Interfaces:

Comparable<SRV>

public class SRV
extends Data
implements Comparable<SRV>

DNS SRV (Service) record payload for service discovery.
Specifies the location of services for a given domain with priority, weight, and port information for load balancing.

Field Summary

Fields

Modifier and Type	Field and Description
int	port The target port.
int	priority The priority of this service.
DnsName	target The target server.
int	weight The weight of this service.

Constructor Summary

Constructors

Constructor and Description
SRV(int priority, int weight, int port, DnsName name)
SRV(int priority, int weight, int port, String name)

Method Summary

Modifier and Type	Method and Description
int	compareTo(SRV other)
Record.TYPE	getType() The payload type.
boolean	isServiceAvailable() Check if the service is available at this domain.
static SRV	parse(DataInputStream dis, byte[] data)
void	serialize(DataOutputStream dos) The internal method used to serialize Data subclasses.
String	toString()

Methods inherited from class org.minidns.record.Data

equals, hashCode, length, toByteArray, toOutputStream, toOutputStream

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

port

public final int port

The target port.

priority

public final int priority

The priority of this service. Lower values mean higher priority.

target

public final DnsName target

The target server.

weight

public final int weight

The weight of this service. Services with the same priority should be balanced based on weight.

Constructor Detail

SRV

public SRV(int priority,
           int weight,
           int port,
           DnsName name)

SRV

public SRV(int priority,
           int weight,
           int port,
           String name)

Method Detail

compareTo

public int compareTo(SRV other)

Specified by:

compareTo in interface Comparable<SRV>

getType

public Record.TYPE getType()

Description copied from class: Data

The payload type.

Specified by:

getType in class Data

Returns:

The payload type.

isServiceAvailable

public boolean isServiceAvailable()

Check if the service is available at this domain. This checks f the target points to the root label. As per RFC 2782 the service is decidedly not available if there is only a single SRV answer pointing to the root label. From RFC 2782:

A Target of "." means that the service is decidedly not available at this domain.

Returns:

true if the service is available at this domain.

parse

public static SRV parse(DataInputStream dis,
                        byte[] data)
                 throws IOException

Throws:

IOException

serialize

public void serialize(DataOutputStream dos)
               throws IOException

Description copied from class: Data

The internal method used to serialize Data subclasses.

Specified by:

serialize in class Data

Parameters:

dos - the output stream to serialize to.

Throws:

IOException - if an I/O error occurs.

toString

public String toString()

Overrides:

toString in class Object