java.lang.Object
- org.apache.activemq.artemis.utils.collections.PriorityLinkedListImpl<E>

All Implemented Interfaces:

PriorityLinkedList<E>
```
public class PriorityLinkedListImpl<E>
extends Object
implements PriorityLinkedList<E>
```
A priority linked list implementation
It implements this by maintaining an individual LinkedBlockingDeque for each priority level.

Field Summary

Fields
Modifier and Type Field Description

protected LinkedListImpl<E>[] levels

Constructor Summary

Constructors
Constructor Description

PriorityLinkedListImpl(int priorities)

PriorityLinkedListImpl(int priorities, Comparator<E> comparator)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addHead(E e, int priority)`
`void`	`addSorted(E e, int priority)`
`void`	`addTail(E e, int priority)`
`void`	`clear()`
`boolean`	`isEmpty()`	Returns `true` if empty, `false` otherwise. It is safe to be called concurrently.
`LinkedListIterator<E>`	`iterator()`
`E`	`peek()`	just look at the first element on the list
`E`	`poll()`
`E`	`removeWithID(String listID, long id)`
`void`	`setNodeStore(NodeStore<E> supplier)`
`int`	`size()`	Returns the size of this list. It is safe to be called concurrently.

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

- Field Detail
  - levels
```
protected final LinkedListImpl<E>[] levels
```
- Constructor Detail
  - PriorityLinkedListImpl
```
public PriorityLinkedListImpl(int priorities)
```
  - PriorityLinkedListImpl
```
public PriorityLinkedListImpl(int priorities,
                              Comparator<E> comparator)
```
- Method Detail
  - addHead
```
public void addHead(E e,
                    int priority)
```
    Specified by:
    
    addHead in interface PriorityLinkedList<E>
  - addTail
```
public void addTail(E e,
                    int priority)
```
    Specified by:
    
    addTail in interface PriorityLinkedList<E>
  - addSorted
```
public void addSorted(E e,
                      int priority)
```
    Specified by:
    
    addSorted in interface PriorityLinkedList<E>
  - setNodeStore
```
public void setNodeStore(NodeStore<E> supplier)
```
    Specified by:
    
    setNodeStore in interface PriorityLinkedList<E>
    
    See Also:
    
    LinkedList.setNodeStore(NodeStore)
  - removeWithID
```
public E removeWithID(String listID,
                      long id)
```
    Specified by:
    
    removeWithID in interface PriorityLinkedList<E>
  - peek
```
public E peek()
```
    Description copied from interface: PriorityLinkedList
    
    just look at the first element on the list
    
    Specified by:
    
    peek in interface PriorityLinkedList<E>
  - poll
```
public E poll()
```
    Specified by:
    
    poll in interface PriorityLinkedList<E>
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface PriorityLinkedList<E>
  - size
```
public int size()
```
    Description copied from interface: PriorityLinkedList
    
    Returns the size of this list.
    It is safe to be called concurrently.
    
    Specified by:
    
    size in interface PriorityLinkedList<E>
  - isEmpty
```
public boolean isEmpty()
```
    Description copied from interface: PriorityLinkedList
    
    Returns true if empty, false otherwise.
    It is safe to be called concurrently.
    
    Specified by:
    
    isEmpty in interface PriorityLinkedList<E>
  - iterator
```
public LinkedListIterator<E> iterator()
```
    Specified by:
    
    iterator in interface PriorityLinkedList<E>

Constructor	Description
`PriorityLinkedListImpl(int priorities)`
`PriorityLinkedListImpl(int priorities, Comparator<E> comparator)`

Class PriorityLinkedListImpl<E>

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

levels

Constructor Detail

PriorityLinkedListImpl

PriorityLinkedListImpl

Method Detail

addHead

addTail

addSorted

setNodeStore

removeWithID

peek

poll

clear

size

isEmpty

iterator