public class DefaultFetchSchedule extends AbstractFetchSchedule
fetchInterval remains
unchanged, and the updated page fetchTime will always be set to
fetchTime + fetchInterval * 1000.defaultInterval, maxIntervalSECONDS_PER_DAY, STATUS_MODIFIED, STATUS_NOTMODIFIED, STATUS_UNKNOWN| Constructor and Description |
|---|
DefaultFetchSchedule() |
| Modifier and Type | Method and Description |
|---|---|
CrawlDatum |
setFetchSchedule(Text url,
CrawlDatum datum,
long prevFetchTime,
long prevModifiedTime,
long fetchTime,
long modifiedTime,
int state)
Sets the
fetchInterval and fetchTime on a
successfully fetched page. |
calculateLastFetchTime, forceRefetch, initializeSchedule, setConf, setPageGoneSchedule, setPageRetrySchedule, shouldFetchgetConfclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetConfpublic CrawlDatum setFetchSchedule(Text url, CrawlDatum datum, long prevFetchTime, long prevModifiedTime, long fetchTime, long modifiedTime, int state)
AbstractFetchSchedulefetchInterval and fetchTime on a
successfully fetched page. NOTE: this implementation resets the retry
counter - extending classes should call super.setFetchSchedule() to
preserve this behavior.setFetchSchedule in interface FetchSchedulesetFetchSchedule in class AbstractFetchScheduleurl - url of the pagedatum - page description to be adjusted. NOTE: this instance, passed by
reference, may be modified inside the method.prevFetchTime - previous value of fetch time, or 0 if not available.prevModifiedTime - previous value of modifiedTime, or 0 if not available.fetchTime - the latest time, when the page was recently re-fetched. Most
FetchSchedule implementations should update the value in @see
CrawlDatum to something greater than this value.modifiedTime - last time the content was modified. This information comes from
the protocol implementations, or is set to < 0 if not available.
Most FetchSchedule implementations should update the value in @see
CrawlDatum to this value.state - if FetchSchedule.STATUS_MODIFIED, then the content is considered to be
"changed" before the fetchTime, if
FetchSchedule.STATUS_NOTMODIFIED then the content is known to be
unchanged. This information may be obtained by comparing page
signatures before and after fetching. If this is set to
FetchSchedule.STATUS_UNKNOWN, then it is unknown whether the page was
changed; implementations are free to follow a sensible default
behavior.Copyright © 2021 The Apache Software Foundation