org.apache.commons.collections4.queue

Class SynchronizedQueue<E>

java.lang.Object

org.apache.commons.collections4.collection.SynchronizedCollection<E>

org.apache.commons.collections4.queue.SynchronizedQueue<E>

Type Parameters:

E - the type of the elements in the collection

All Implemented Interfaces:

java.io.Serializable, java.lang.Iterable<E>, java.util.Collection<E>, java.util.Queue<E>

public class SynchronizedQueue<E>
extends SynchronizedCollection<E>
implements java.util.Queue<E>

Decorates another Queue to synchronize its behaviour for a multi-threaded environment.

Methods are synchronized, then forwarded to the decorated queue. Iterators must be separately synchronized around the loop.

Since:

4.2

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
E	element()
boolean	equals(java.lang.Object object)
int	hashCode()
boolean	offer(E e)
E	peek()
E	poll()
E	remove()
static <E> SynchronizedQueue<E>	synchronizedQueue(java.util.Queue<E> queue) Factory method to create a synchronized queue.

Methods inherited from class org.apache.commons.collections4.collection.SynchronizedCollection

add, addAll, clear, contains, containsAll, isEmpty, iterator, remove, removeAll, removeIf, retainAll, size, synchronizedCollection, toArray, toArray, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Queue

add

Methods inherited from interface java.util.Collection

addAll, clear, contains, containsAll, isEmpty, iterator, parallelStream, remove, removeAll, removeIf, retainAll, size, spliterator, stream, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Method Detail

synchronizedQueue

public static <E> SynchronizedQueue<E> synchronizedQueue(java.util.Queue<E> queue)

Factory method to create a synchronized queue.

Type Parameters:

E - the type of the elements in the queue

Parameters:

queue - the queue to decorate, must not be null

Returns:

a new synchronized Queue

Throws:

java.lang.NullPointerException - if queue is null

element

public E element()

Specified by:

element in interface java.util.Queue<E>

equals

public boolean equals(java.lang.Object object)

Specified by:

equals in interface java.util.Collection<E>

Overrides:

equals in class SynchronizedCollection<E>

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Collection<E>

Overrides:

hashCode in class SynchronizedCollection<E>

offer

public boolean offer(E e)

Specified by:

offer in interface java.util.Queue<E>

peek

public E peek()

Specified by:

peek in interface java.util.Queue<E>

poll

public E poll()

Specified by:

poll in interface java.util.Queue<E>

remove

public E remove()

Specified by:

remove in interface java.util.Queue<E>