Scheduler (webmagic 1.0.0-SNAPSHOT API)

All Known Subinterfaces:

MonitorableScheduler

All Known Implementing Classes:

DelayQueueScheduler, DuplicateRemovedScheduler, FileCacheQueueScheduler, LevelLimitScheduler, MmapQueueScheduler, PriorityScheduler, QueueScheduler, RedisPriorityScheduler, RedisScheduler
```
public interface Scheduler
```
Scheduler is the part of url management.
You can implement interface Scheduler to do: manage urls to fetch remove duplicate urls

Since:

0.1.0

Author:

code4crafter@gmail.com

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Request`	`poll(Task task)`	get an url to crawl
`void`	`push(Request request, Task task)`	add a url to fetch

- Method Detail
  - push
```
void push(Request request,
          Task task)
```
    add a url to fetch
    
    Parameters:
    
    request - request
    
    task - task
  - poll
```
Request poll(Task task)
```
    get an url to crawl
    
    Parameters:
    
    task - the task of spider
    
    Returns:
    
    the url to crawl