com.fr.third.jgroups.util

类 ConcurrentLinkedBlockingQueue2<T>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractQueue<E>

java.util.concurrent.ConcurrentLinkedQueue<T>

com.fr.third.jgroups.util.ConcurrentLinkedBlockingQueue2<T>

所有已实现的接口:

java.io.Serializable, java.lang.Iterable<T>, java.util.Collection<T>, java.util.concurrent.BlockingQueue<T>, java.util.Queue<T>

public class ConcurrentLinkedBlockingQueue2<T>
extends java.util.concurrent.ConcurrentLinkedQueue<T>
implements java.util.concurrent.BlockingQueue<T>

Attempt at writing a fast transfer queue, which is bounded. The take() method blocks until there is an element, but the offer() method drops the element and returns if the queue is full (doesn't block).

The design assumes a number of producers but only one consumer. The consumer only blocks when the queue is empty (on the not-empty condition), the producers block when the queue is full (on the not-full condition). The producers increment a count atomically and if the count is greater than the capacity, they block on the not-full condition. The consumer decrements the condition and signals the not-full condition when the count is capacity -1 (from capacity to capacity-1). The producers signal not-empty when the count is 1 (from 0 to 1)

从以下版本开始:

3.5

作者:

Bela Ban

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
protected int	capacity
protected java.util.concurrent.atomic.AtomicInteger	count
protected java.util.concurrent.locks.Condition	not_empty
protected java.util.concurrent.locks.Lock	not_empty_lock

构造器概要

构造器

构造器和说明
ConcurrentLinkedBlockingQueue2(int capacity)

方法概要

方法

限定符和类型	方法和说明
protected void	decrCount()
int	drainTo(java.util.Collection<? super T> c)
int	drainTo(java.util.Collection<? super T> c, int maxElements)
protected void	incrCount()
boolean	offer(T t) Drops elements if capacity has been reached.
boolean	offer(T t, long timeout, java.util.concurrent.TimeUnit unit)
T	poll()
T	poll(long timeout, java.util.concurrent.TimeUnit unit)
void	put(T t)
int	remainingCapacity()
boolean	remove(java.lang.Object o)
int	size()
T	take()
protected void	waitForNotEmpty()

从类继承的方法 java.util.concurrent.ConcurrentLinkedQueue

add, addAll, contains, isEmpty, iterator, peek, toArray, toArray

从类继承的方法 java.util.AbstractQueue

clear, element, remove

从类继承的方法 java.util.AbstractCollection

containsAll, removeAll, retainAll, toString

从类继承的方法 java.lang.Object

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

从接口继承的方法 java.util.concurrent.BlockingQueue

add, contains

从接口继承的方法 java.util.Queue

element, peek, remove

从接口继承的方法 java.util.Collection

addAll, clear, containsAll, equals, hashCode, isEmpty, iterator, removeAll, retainAll, toArray, toArray

字段详细资料

capacity

protected final int capacity

count

protected final java.util.concurrent.atomic.AtomicInteger count

not_empty_lock

protected final java.util.concurrent.locks.Lock not_empty_lock

not_empty

protected final java.util.concurrent.locks.Condition not_empty

构造器详细资料

ConcurrentLinkedBlockingQueue2

public ConcurrentLinkedBlockingQueue2(int capacity)

方法详细资料

offer

public boolean offer(T t)

Drops elements if capacity has been reached. That's OK for the ThreadPoolExecutor as dropped messages will get retransmitted

指定者:

offer 在接口中 java.util.concurrent.BlockingQueue<T>

指定者:

offer 在接口中 java.util.Queue<T>

覆盖:

offer 在类中 java.util.concurrent.ConcurrentLinkedQueue<T>

参数:

t -

返回:

take

public T take()
       throws java.lang.InterruptedException

指定者:

take 在接口中 java.util.concurrent.BlockingQueue<T>

抛出:

java.lang.InterruptedException

poll

public T poll()

指定者:

poll 在接口中 java.util.Queue<T>

覆盖:

poll 在类中 java.util.concurrent.ConcurrentLinkedQueue<T>

poll

public T poll(long timeout,
     java.util.concurrent.TimeUnit unit)
       throws java.lang.InterruptedException

指定者:

poll 在接口中 java.util.concurrent.BlockingQueue<T>

抛出:

java.lang.InterruptedException

remove

public boolean remove(java.lang.Object o)

指定者:

remove 在接口中 java.util.Collection<T>

指定者:

remove 在接口中 java.util.concurrent.BlockingQueue<T>

覆盖:

remove 在类中 java.util.concurrent.ConcurrentLinkedQueue<T>

remainingCapacity

public int remainingCapacity()

指定者:

remainingCapacity 在接口中 java.util.concurrent.BlockingQueue<T>

drainTo

public int drainTo(java.util.Collection<? super T> c)

指定者:

drainTo 在接口中 java.util.concurrent.BlockingQueue<T>

put

public void put(T t)
         throws java.lang.InterruptedException

指定者:

put 在接口中 java.util.concurrent.BlockingQueue<T>

抛出:

java.lang.InterruptedException

offer

public boolean offer(T t,
            long timeout,
            java.util.concurrent.TimeUnit unit)
              throws java.lang.InterruptedException

指定者:

offer 在接口中 java.util.concurrent.BlockingQueue<T>

抛出:

java.lang.InterruptedException

size

public int size()

指定者:

size 在接口中 java.util.Collection<T>

覆盖:

size 在类中 java.util.concurrent.ConcurrentLinkedQueue<T>

drainTo

public int drainTo(java.util.Collection<? super T> c,
          int maxElements)

指定者:

drainTo 在接口中 java.util.concurrent.BlockingQueue<T>

waitForNotEmpty

protected void waitForNotEmpty()
                        throws java.lang.InterruptedException

抛出:

java.lang.InterruptedException

decrCount

protected void decrCount()

incrCount

protected void incrCount()