org.egothor.robot

Class DNSClient<T>

java.lang.Object

java.lang.Thread

org.egothor.robot.DNSClient<T>

All Implemented Interfaces:

Runnable

public abstract class DNSClient<T>
extends Thread

DNS client object with a caching capability. It supports just one query per UDP packet.

Author:

Leo Galambos

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DNSClient.AaaRR Answer, Authority, Additional RR
static class	DNSClient.DataBlock
static class	DNSClient.Question<T>

Nested classes/interfaces inherited from class java.lang.Thread

Thread.State, Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
static short	CLASS_CH
static short	CLASS_CS
static short	CLASS_HS
static short	CLASS_IN
static short	TYPE_A
static short	TYPE_CNAME
static short	TYPE_HINFO
static short	TYPE_MB
static short	TYPE_MD
static short	TYPE_MF
static short	TYPE_MG
static short	TYPE_MINFO
static short	TYPE_MR
static short	TYPE_MX
static short	TYPE_NS
static short	TYPE_NULL
static short	TYPE_PTR
static short	TYPE_SOA
static short	TYPE_TXT
static short	TYPE_WKS

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
DNSClient(String server, long dnstimeout)

Method Summary

Modifier and Type	Method and Description
void	assignID2Question(int id, DNSClient.Question<T> q)
void	cancel(int id, T auth) Cancel the request from outside world.
abstract void	expired(T q) DNS server sent some response which is not the answer to our query - callback.
abstract void	finishedEmpty(T q) Recursive queries were too deep - callback.
abstract void	finishedOK(T a, DNSClient.AaaRR resp) We have a valid response back - callback.
void	idle(long now) This routine is called every dnstimeout milliseconds automatically.
boolean	isBroken()
float	missRate()
float	missRateF()
void	run()
void	submit(String hostname, short type, short clazz, T attachment)

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CLASS_IN

public static final short CLASS_IN

See Also:

Constant Field Values

CLASS_CS

public static final short CLASS_CS

See Also:

Constant Field Values

CLASS_CH

public static final short CLASS_CH

See Also:

Constant Field Values

CLASS_HS

public static final short CLASS_HS

See Also:

Constant Field Values

TYPE_A

public static final short TYPE_A

See Also:

Constant Field Values

TYPE_NS

public static final short TYPE_NS

See Also:

Constant Field Values

TYPE_MD

public static final short TYPE_MD

See Also:

Constant Field Values

TYPE_MF

public static final short TYPE_MF

See Also:

Constant Field Values

TYPE_CNAME

public static final short TYPE_CNAME

See Also:

Constant Field Values

TYPE_SOA

public static final short TYPE_SOA

See Also:

Constant Field Values

TYPE_MB

public static final short TYPE_MB

See Also:

Constant Field Values

TYPE_MG

public static final short TYPE_MG

See Also:

Constant Field Values

TYPE_MR

public static final short TYPE_MR

See Also:

Constant Field Values

TYPE_NULL

public static final short TYPE_NULL

See Also:

Constant Field Values

TYPE_WKS

public static final short TYPE_WKS

See Also:

Constant Field Values

TYPE_PTR

public static final short TYPE_PTR

See Also:

Constant Field Values

TYPE_HINFO

public static final short TYPE_HINFO

See Also:

Constant Field Values

TYPE_MINFO

public static final short TYPE_MINFO

See Also:

Constant Field Values

TYPE_MX

public static final short TYPE_MX

See Also:

Constant Field Values

TYPE_TXT

public static final short TYPE_TXT

See Also:

Constant Field Values

Constructor Detail

DNSClient

public DNSClient(String server,
                 long dnstimeout)
          throws IOException

Throws:

IOException

Method Detail

missRate

public float missRate()

missRateF

public float missRateF()

assignID2Question

public void assignID2Question(int id,
                              DNSClient.Question<T> q)

submit

public void submit(String hostname,
                   short type,
                   short clazz,
                   T attachment)
            throws IOException

Throws:

IOException

finishedOK

public abstract void finishedOK(T a,
                                DNSClient.AaaRR resp)

We have a valid response back - callback.

expired

public abstract void expired(T q)

DNS server sent some response which is not the answer to our query - callback.

finishedEmpty

public abstract void finishedEmpty(T q)

Recursive queries were too deep - callback.

cancel

public void cancel(int id,
                   T auth)

Cancel the request from outside world.

idle

public void idle(long now)

This routine is called every dnstimeout milliseconds automatically. It should be used as a hook which will clean up dead requests.

isBroken

public boolean isBroken()

run

public void run()

Specified by:

run in interface Runnable

Overrides:

run in class Thread