All Implemented Interfaces:
```
public interface UrlPool

                    
```
A UrlPool contains many UrlCaches, the urls added to the pool will be processed in crawl loops.
Different UrlCaches in UrlPool have different priorities, there are real time cache, delay cache, ordered caches and unordered caches.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public class`	`UrlPool.Companion`

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`abstract Unit`	`initialize()`	Initialize the url pool
`abstract Boolean`	`add(String url, Priority13 priority)`	Add a url to the pool
`abstract Boolean`	`add(UrlAware url)`	Add a url to the pool
`abstract Boolean`	`addAll(Iterable<String> urls, Priority13 priority)`	Add urls to the pool
`abstract Boolean`	`addAll(Iterable<UrlAware> urls)`	Add urls to the pool
`abstract Unit`	`removeDeceased()`	Remove deceased urls, such as URLs that are past the deadline.
`abstract Unit`	`clear()`	Clear the pool
`abstract Boolean`	`hasMore()`	Check if there is more items in the url pool
`abstract String`	`getId()`
`abstract UrlCache`	`getRealTimeCache()`	The real time url cache in which urls have the highest priority of all.
`abstract Queue<DelayUrl>`	`getDelayCache()`	An unbounded queue of Delayed urls, in which an element can only be taken when its delay has expired.
`abstract Map<Integer, UrlCache>`	`getOrderedCaches()`	The ordered url caches.
`abstract List<UrlCache>`	`getUnorderedCaches()`	The unordered url caches, tasks in unordered caches have the lowest priority.
`abstract Integer`	`getTotalCount()`	Total number of items in all url caches.
`abstract UrlCache`	`getLowestCache()`	A shortcut to the cache with the lowest priority in the ordered caches
`abstract UrlCache`	`getLower5Cache()`	A shortcut to the cache that is 5 priority lower than the normal cache in the ordered caches.
`abstract UrlCache`	`getLower4Cache()`	A shortcut to the cache that is 4 priority lower than the normal cache in the ordered caches.
`abstract UrlCache`	`getLower3Cache()`	A shortcut to the cache that is 3 priority lower than the normal cache in the ordered caches.
`abstract UrlCache`	`getLower2Cache()`	A shortcut to the cache that is 2 priority lower than the normal cache in the ordered caches.
`abstract UrlCache`	`getLowerCache()`	A shortcut to the cache that is 1 priority lower than the normal cache in the ordered caches.
`abstract UrlCache`	`getNormalCache()`	A shortcut to the cache has the default priority in the ordered caches.
`abstract UrlCache`	`getHigherCache()`	A shortcut to the cache that is 1 priority higher than the normal cache in the ordered caches.
`abstract UrlCache`	`getHigher2Cache()`	A shortcut to the cache that is 2 priority higher than the normal cache in the ordered caches.
`abstract UrlCache`	`getHigher3Cache()`	A shortcut to the cache that is 3 priority higher than the normal cache in the ordered caches.
`abstract UrlCache`	`getHigher4Cache()`	A shortcut to the cache that is 4 priority higher than the normal cache in the ordered caches.
`abstract UrlCache`	`getHigher5Cache()`	A shortcut to the cache that is 5 priority higher than the normal cache in the ordered caches.
`abstract UrlCache`	`getHighestCache()`	A shortcut to the cache with the highest priority in the ordered caches.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
- Method Detail
  - initialize
```
 abstract Unit initialize()
```
    Initialize the url pool
  - add
```
 abstract Boolean add(String url, Priority13 priority)
```
    Add a url to the pool
  - add
```
 abstract Boolean add(UrlAware url)
```
    Add a url to the pool
  - addAll
```
 abstract Boolean addAll(Iterable<String> urls, Priority13 priority)
```
    Add urls to the pool
  - addAll
```
 abstract Boolean addAll(Iterable<UrlAware> urls)
```
    Add urls to the pool
  - removeDeceased
```
 abstract Unit removeDeceased()
```
    Remove deceased urls, such as URLs that are past the deadline.
  - clear
```
 abstract Unit clear()
```
    Clear the pool
  - hasMore
```
 abstract Boolean hasMore()
```
    Check if there is more items in the url pool
  - getId
```
 abstract String getId()
```
  - getRealTimeCache
```
 abstract UrlCache getRealTimeCache()
```
    The real time url cache in which urls have the highest priority of all.
  - getDelayCache
```
 abstract Queue<DelayUrl> getDelayCache()
```
    An unbounded queue of Delayed urls, in which an element can only be taken when its delay has expired.
    Delay cache has higher priority than all ordered caches and is usually used for retrying tasks.
  - getOrderedCaches
```
 abstract Map<Integer, UrlCache> getOrderedCaches()
```
    The ordered url caches.
    Ordered caches has higher priority than unordered caches.
  - getUnorderedCaches
```
 abstract List<UrlCache> getUnorderedCaches()
```
    The unordered url caches, tasks in unordered caches have the lowest priority.
    Unordered caches has the lowest priority of all
  - getTotalCount
```
 abstract Integer getTotalCount()
```
    Total number of items in all url caches.
  - getLowestCache
```
 abstract UrlCache getLowestCache()
```
    A shortcut to the cache with the lowest priority in the ordered caches
  - getLower5Cache
```
 abstract UrlCache getLower5Cache()
```
    A shortcut to the cache that is 5 priority lower than the normal cache in the ordered caches.
  - getLower4Cache
```
 abstract UrlCache getLower4Cache()
```
    A shortcut to the cache that is 4 priority lower than the normal cache in the ordered caches.
  - getLower3Cache
```
 abstract UrlCache getLower3Cache()
```
    A shortcut to the cache that is 3 priority lower than the normal cache in the ordered caches.
  - getLower2Cache
```
 abstract UrlCache getLower2Cache()
```
    A shortcut to the cache that is 2 priority lower than the normal cache in the ordered caches.
  - getLowerCache
```
 abstract UrlCache getLowerCache()
```
    A shortcut to the cache that is 1 priority lower than the normal cache in the ordered caches.
  - getNormalCache
```
 abstract UrlCache getNormalCache()
```
    A shortcut to the cache has the default priority in the ordered caches.
  - getHigherCache
```
 abstract UrlCache getHigherCache()
```
    A shortcut to the cache that is 1 priority higher than the normal cache in the ordered caches.
  - getHigher2Cache
```
 abstract UrlCache getHigher2Cache()
```
    A shortcut to the cache that is 2 priority higher than the normal cache in the ordered caches.
  - getHigher3Cache
```
 abstract UrlCache getHigher3Cache()
```
    A shortcut to the cache that is 3 priority higher than the normal cache in the ordered caches.
  - getHigher4Cache
```
 abstract UrlCache getHigher4Cache()
```
    A shortcut to the cache that is 4 priority higher than the normal cache in the ordered caches.
  - getHigher5Cache
```
 abstract UrlCache getHigher5Cache()
```
    A shortcut to the cache that is 5 priority higher than the normal cache in the ordered caches.
  - getHighestCache
```
 abstract UrlCache getHighestCache()
```
    A shortcut to the cache with the highest priority in the ordered caches.

Interface UrlPool

Nested Class Summary

Field Summary

Constructor Summary

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

Method Detail

initialize

add

add

addAll

addAll

removeDeceased

clear

hasMore

getId

getRealTimeCache

getDelayCache

getOrderedCaches

getUnorderedCaches

getTotalCount

getLowestCache

getLower5Cache

getLower4Cache

getLower3Cache

getLower2Cache

getLowerCache

getNormalCache

getHigherCache

getHigher2Cache

getHigher3Cache

getHigher4Cache

getHigher5Cache

getHighestCache