NewsFetchSchedule

All Implemented Interfaces:

ai.platon.pulsar.common.config.Parameterized , ai.platon.pulsar.crawl.schedule.FetchSchedule
```
public final class NewsFetchSchedule
extends AdaptiveFetchSchedule
                    
```
This class implements an adaptive re-fetch algorithm.
NOTE: values of DEC_FACTOR and INC_FACTOR higher than 0.4f may destabilize the algorithm, so that the fetch interval either increases or decreases infinitely, with little relevance to the page changes

Field Summary

Fields
Modifier and Type	Field	Description
`private final Duration`	`maxFetchInterval`
`private final ImmutableConfig`	`conf`
`private final MiscMessageWriter`	`messageWriter`

Constructor Summary

Constructors
Constructor	Description
`NewsFetchSchedule(ImmutableConfig conf, MiscMessageWriter messageWriter)`

Method Summary

Modifier and Type	Method	Description
`Duration`	`getMaxFetchInterval()`
`final ImmutableConfig`	`getConf()`
`final MiscMessageWriter`	`getMessageWriter()`
`Unit`	`setFetchSchedule(WebPage page, ModifyInfo m)`	Sets the `fetchInterval` and `fetchTime` on a successfully fetched page.

Methods inherited from class ai.platon.pulsar.crawl.schedule.NewsFetchSchedule
getParams, setPageGoneSchedule
Methods inherited from class ai.platon.pulsar.crawl.schedule.AdaptiveFetchSchedule
estimatePrevFetchTime, forceRefetch, initializeSchedule, setPageRetrySchedule, shouldFetch
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - NewsFetchSchedule
```
NewsFetchSchedule(ImmutableConfig conf, MiscMessageWriter messageWriter)
```
- Method Detail
  - getMaxFetchInterval
```
 Duration getMaxFetchInterval()
```
  - getConf
```
 final ImmutableConfig getConf()
```
  - getMessageWriter
```
 final MiscMessageWriter getMessageWriter()
```
  - setFetchSchedule
```
 Unit setFetchSchedule(WebPage page, ModifyInfo m)
```
    Sets the fetchInterval and fetchTime on a successfully fetched page. NOTE: this implementation resets the retry counter - extending classes should call super.setFetchSchedule() to preserve this behavior.
    
    Parameters:
    
    page - The Web page
    
    m - The modification info