com.karmasphere.server.handler.share
Class DnsClient

java.lang.Object
  com.karmasphere.server.handler.share.DnsClient

public class DnsClient
extends Object

A DnsClient wrapper. This structure ensures that in a high throughput environment, there is a fixed minimum time before the same query id and source port pair is used.

Field Summary

static int	CREDIBILITY
static long	MIN_WRAP_TIME Default minimum time before sending a dns query with repeated id in milliseconds.

Constructor Summary

DnsClient(com.karmasphere.server.handler.HandlerMap backend)
Create a new DnsClient with the specified HandlerMap.

Method Summary

void	query(org.xbill.DNS.Name name, int type, ResponseCallback rc) Send a dns query, and send the response to c if/when it arrives.

Methods inherited from class java.lang.Object

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

Field Detail

MIN_WRAP_TIME

public static final long MIN_WRAP_TIME

Default minimum time before sending a dns query with repeated id in milliseconds.

See Also:

Constant Field Values

CREDIBILITY

public static final int CREDIBILITY

See Also:

Constant Field Values

Constructor Detail

DnsClient

public DnsClient(com.karmasphere.server.handler.HandlerMap backend)
          throws IOException

Create a new DnsClient with the specified HandlerMap.

Parameters:

backend - The HandlerMap.

Throws:

IOException

Method Detail

query

public void query(org.xbill.DNS.Name name,
                  int type,
                  ResponseCallback rc)
           throws IOException

Send a dns query, and send the response to c if/when it arrives.

Parameters:

m - The dns lookup to send.

c - The callback to send the response back to.

Throws:

IOException