Package com.rabbitmq.client

Class DnsSrvRecordAddressResolver

java.lang.Object

com.rabbitmq.client.DnsSrvRecordAddressResolver

All Implemented Interfaces:

AddressResolver

public class DnsSrvRecordAddressResolver
extends Object
implements AddressResolver

AddressResolver that resolves addresses against a DNS SRV request. SRV records contain the hostname and the port for a given service. They also support priorities, to give precedence to a given host over other hosts. Note the hosts returned by the SRV query must be resolvable by the DNS servers of the underlying platform (or the default ones specified for this Java process). This class does not issue a query for A records after the SRV query. This implementation returns the highest-priority records first. This behavior can be changed by overriding the sort method. This implementation uses internally the com.sun.jndi.dns.DnsContextFactory class for the DNS query. The first returned address is used when automatic recovery is NOT enabled at the ConnectionFactory level. When automatic recovery is enabled, a random address will be picked up from the returned list of Addresses.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DnsSrvRecordAddressResolver.SrvRecord

Constructor Summary

Constructors

Constructor	Description
DnsSrvRecordAddressResolver(String service)
DnsSrvRecordAddressResolver(String service, String dnsUrls)

Method Summary

Modifier and Type	Method	Description
List<Address>	getAddresses()	Get the potential Addresses to connect to.
protected List<DnsSrvRecordAddressResolver.SrvRecord>	lookupSrvRecords(String service, String dnsUrls)
protected DnsSrvRecordAddressResolver.SrvRecord	mapSrvRecord(String srvResult)
protected List<DnsSrvRecordAddressResolver.SrvRecord>	sort(List<DnsSrvRecordAddressResolver.SrvRecord> records)

Methods inherited from class java.lang.Object

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

Constructor Detail

DnsSrvRecordAddressResolver

public DnsSrvRecordAddressResolver(String service)

DnsSrvRecordAddressResolver

public DnsSrvRecordAddressResolver(String service,
                                   String dnsUrls)

Method Detail

getAddresses

public List<Address> getAddresses()
                           throws IOException

Description copied from interface: AddressResolver

Get the potential Addresses to connect to.

Specified by:

getAddresses in interface AddressResolver

Returns:

candidate Addresses

Throws:

IOException - if it encounters a problem

lookupSrvRecords

protected List<DnsSrvRecordAddressResolver.SrvRecord> lookupSrvRecords(String service,
                                                                       String dnsUrls)
                                                                throws IOException

Throws:

IOException

mapSrvRecord

protected DnsSrvRecordAddressResolver.SrvRecord mapSrvRecord(String srvResult)

sort

protected List<DnsSrvRecordAddressResolver.SrvRecord> sort(List<DnsSrvRecordAddressResolver.SrvRecord> records)