websphinx
Class LinkEvent

java.lang.Object
  |
  +--websphinx.LinkEvent

public class LinkEvent

extends java.lang.Object

Link event. A LinkEvent is issued when the crawler starts or stops retrieving a link, and when it makes a decision about a link.

Field Summary

static int	ALREADY_VISITED Link has already been visited during the crawl, so it was skipped.
(package private) Crawler	crawler
static int	DOWNLOADED Link has been retrieved
static int	ERROR An error occurred in retrieving the page.
static java.lang.String[]	eventName Map from id code (RETRIEVING) to name ("retrieving")
(package private) java.lang.Throwable	exception
(package private) int	id
(package private) Link	link
static int	NONE No event occured on this link yet.
static int	QUEUED Link was accepted by walk() and is waiting to be downloaded
static int	RETRIEVING Link is being retrieved
static int	SKIPPED Link was rejected by shouldVisit()
static int	TOO_DEEP Link was accepted by walk() but exceeds the maximum depth from the start set.
static int	VISITED Link has been thoroughly processed by crawler

Constructor Summary

LinkEvent(Crawler crawler, int id, Link link)
Make a LinkEvent.

LinkEvent(Crawler crawler, int id, Link link, java.lang.Throwable exception)
Make a LinkEvent for an error.

Method Summary

Crawler	getCrawler() Get crawler that generated the event
java.lang.Throwable	getException() Get exception related to this event.
int	getID() Get event id
Link	getLink() Get link to which this event occurred.
java.lang.String	getName() Get event name (string equivalent to its ID)
java.lang.String	toString() Convert this event to a String describing it.

Methods inherited from class java.lang.Object

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

Field Detail

crawler

Crawler crawler

id

int id

link

Link link

exception

java.lang.Throwable exception

NONE

public static final int NONE

No event occured on this link yet. Never delivered in a LinkEvent, but may be returned by link.getStatus().

SKIPPED

public static final int SKIPPED

Link was rejected by shouldVisit()

ALREADY_VISITED

public static final int ALREADY_VISITED

Link has already been visited during the crawl, so it was skipped.

TOO_DEEP

public static final int TOO_DEEP

Link was accepted by walk() but exceeds the maximum depth from the start set.

QUEUED

public static final int QUEUED

Link was accepted by walk() and is waiting to be downloaded

RETRIEVING

public static final int RETRIEVING

Link is being retrieved

ERROR

public static final int ERROR

An error occurred in retrieving the page. The error can be obtained from getException().

DOWNLOADED

public static final int DOWNLOADED

Link has been retrieved

VISITED

public static final int VISITED

Link has been thoroughly processed by crawler

eventName

public static final java.lang.String[] eventName

Map from id code (RETRIEVING) to name ("retrieving")

Constructor Detail

LinkEvent

public LinkEvent(Crawler crawler,
                 int id,
                 Link link)

Make a LinkEvent.

Parameters:

crawler - Crawler that generated this event

id - event code, like LinkEvent.RETRIEVING

link - Link on which this event occurred

LinkEvent

public LinkEvent(Crawler crawler,
                 int id,
                 Link link,
                 java.lang.Throwable exception)

Make a LinkEvent for an error.

Parameters:

crawler - Crawler that generated this event

id - Event code, usually ERROR

link - Link on which this event occurred

exception - Throwable

Method Detail

getCrawler

public Crawler getCrawler()

Get crawler that generated the event

Returns:

crawler

getID

public int getID()

Get event id

Returns:

id

getName

public java.lang.String getName()

Get event name (string equivalent to its ID)

Returns:

id

getLink

public Link getLink()

Get link to which this event occurred.

Returns:

link

getException

public java.lang.Throwable getException()

Get exception related to this event. Valid when ID == ERROR.

Returns:

exception object

toString

public java.lang.String toString()

Convert this event to a String describing it.

Overrides:

toString in class java.lang.Object