Package org.apache.nutch.hostdb

Class ResolverThread

java.lang.Object

org.apache.nutch.hostdb.ResolverThread

All Implemented Interfaces:

Runnable

public class ResolverThread
extends Object
implements Runnable

Simple runnable that performs DNS lookup for a single host.

Field Summary

Fields

Modifier and Type	Field	Description
protected Reducer.Context	context
protected HostDatum	datum
protected String	host
protected Text	hostText
protected int	purgeFailedHostsThreshold

Constructor Summary

Constructors

Constructor	Description
ResolverThread(String host, HostDatum datum, Reducer.Context context, int purgeFailedHostsThreshold)	Overloaded constructor.

Method Summary

Modifier and Type	Method	Description
void	run()

Methods inherited from class java.lang.Object

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

Field Details

host

protected String host

datum

protected HostDatum datum

hostText

protected Text hostText

context

protected Reducer.Context context

purgeFailedHostsThreshold

protected int purgeFailedHostsThreshold

Constructor Details

ResolverThread

public ResolverThread(String host,
 HostDatum datum,
 Reducer.Context context,
 int purgeFailedHostsThreshold)

Overloaded constructor.

Parameters:

host - name of the host to lookup

datum - accompanying host information

context - Reducer.Context for writing custom counters and output.

purgeFailedHostsThreshold - int value which marks the maximum failed DNS lookups before a given host is purged from the hostdb

Method Details

run

public void run()

Specified by:

run in interface Runnable