org.apache.cassandra.utils.concurrent

Class Accumulator<E>

java.lang.Object

org.apache.cassandra.utils.concurrent.Accumulator<E>

Type Parameters:

E -

All Implemented Interfaces:

java.lang.Iterable<E>

public class Accumulator<E>
extends java.lang.Object
implements java.lang.Iterable<E>

A simple append-only collection supporting an unbounded number of concurrent readers/writers, but a bounded number of items.

Constructor Summary

Constructors

Constructor and Description
Accumulator(int size)

Method Summary

Methods

Modifier and Type	Method and Description
void	add(E item) Adds an item to the collection.
E	get(int i)
boolean	isEmpty()
java.util.Iterator<E>	iterator()
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

Accumulator

public Accumulator(int size)

Method Detail

add

public void add(E item)

Adds an item to the collection. Note it is not guaranteed to be visible on exiting the method, if another add was happening concurrently; it will be visible once all concurrent adds (which are non-blocking) complete, but it is not guaranteed that any size change occurs during the execution of any specific call.

Parameters:

item - add to collection

isEmpty

public boolean isEmpty()

size

public int size()

Returns:

the size of guaranteed-to-be-visible portion of the list

iterator

public java.util.Iterator<E> iterator()

Specified by:

iterator in interface java.lang.Iterable<E>

get

public E get(int i)