Package com.couchbase.client.java.datastructures.collections

Class CouchbaseQueue<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractQueue<E>

com.couchbase.client.java.datastructures.collections.CouchbaseQueue<E>

Type Parameters:

E - the type of values in the queue.

All Implemented Interfaces:

Iterable<E>, Collection<E>, Queue<E>

@Committed
@Public
public class CouchbaseQueue<E>
extends AbstractQueue<E>

A CouchbaseQueue is a Queue backed by a Couchbase document (more specifically a JSON array). Note that as such, a CouchbaseQueue is restricted to the types that a JSON array can contain. JSON objects and sub-arrays can be represented as JsonObject and JsonArray respectively. Null values are not allowed as they have special meaning for the peek() and AbstractQueue.remove() methods of a queue.

Since:

2.3.6

Author:

Simon Baslé, Subhashni Balakrishnan

Constructor Summary

Constructors

Constructor	Description
CouchbaseQueue(String id, Bucket bucket)	Create a new Couchbase-backed Queue, backed by the document identified by id in bucket.
CouchbaseQueue(String id, Bucket bucket, E... content)	Create a new Couchbase-backed Queue, backed by the document identified by id in bucket.
CouchbaseQueue(String id, Bucket bucket, Collection<? extends E> content)	Create a new Couchbase-backed Queue, backed by the document identified by id in bucket.

Method Summary

Modifier and Type	Method	Description
void	clear()
Iterator<E>	iterator()
boolean	offer(E e)
E	peek()
E	poll()
int	size()

Methods inherited from class java.util.AbstractQueue

add, addAll, element, remove

Methods inherited from class java.util.AbstractCollection

contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Collection

contains, containsAll, equals, hashCode, isEmpty, parallelStream, remove, removeAll, removeIf, retainAll, spliterator, stream, toArray, toArray, toArray

Methods inherited from interface java.lang.Iterable

forEach

Constructor Details

CouchbaseQueue

public CouchbaseQueue(String id,
Bucket bucket)

Create a new Couchbase-backed Queue, backed by the document identified by id in bucket. Note that if the document already exists, its content will be used as initial content for this collection. Otherwise it is created empty.

Parameters:

id - the id of the Couchbase document to back the queue.

bucket - the Bucket through which to interact with the document.

CouchbaseQueue

public CouchbaseQueue(String id,
Bucket bucket,
E... content)

Create a new Couchbase-backed Queue, backed by the document identified by id in bucket. Note that if the document already exists, its content is reset to the values provided. Note that if you don't provide any value as a vararg, the CouchbaseQueue(String, Bucket) constructor will be invoked instead, which will use pre-existing values as content. To create a new Queue and force it to be empty, use CouchbaseQueue(String, Bucket, Collection) with an empty collection.

Parameters:

id - the id of the Couchbase document to back the queue.

bucket - the Bucket through which to interact with the document.

content - vararg of the elements to initially store in the Queue.

CouchbaseQueue

public CouchbaseQueue(String id,
Bucket bucket,
Collection<? extends E> content)

Create a new Couchbase-backed Queue, backed by the document identified by id in bucket. Note that if the document already exists, its content is reset to the values provided in the content Collection.

Parameters:

id - the id of the Couchbase document to back the queue.

bucket - the Bucket through which to interact with the document.

content - collection of the elements to initially store in the Queue, in iteration order.

Method Details

iterator

public Iterator<E> iterator()

Specified by:

iterator in interface Collection<E>

Specified by:

iterator in interface Iterable<E>

Specified by:

iterator in class AbstractCollection<E>

size

public int size()

Specified by:

size in interface Collection<E>

Specified by:

size in class AbstractCollection<E>

clear

public void clear()

Specified by:

clear in interface Collection<E>

Overrides:

clear in class AbstractQueue<E>

offer

public boolean offer(E e)

poll

public E poll()

peek

public E peek()