Package org.apache.dubbo.common.threadpool

Class MemorySafeLinkedBlockingQueue<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractQueue<E>

java.util.concurrent.LinkedBlockingQueue<E>

org.apache.dubbo.common.threadpool.MemorySafeLinkedBlockingQueue<E>

All Implemented Interfaces:

Serializable, Iterable<E>, Collection<E>, BlockingQueue<E>, Queue<E>

public class MemorySafeLinkedBlockingQueue<E>
extends LinkedBlockingQueue<E>

Can completely solve the OOM problem caused by LinkedBlockingQueue, does not depend on Instrumentation and is easier to use than MemoryLimitedLinkedBlockingQueue.

See Also:

• MemorySafeLinkedBlockingQueue
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	THE_256_MB

Constructor Summary

Constructors

Constructor	Description
MemorySafeLinkedBlockingQueue()
MemorySafeLinkedBlockingQueue(long maxFreeMemory)
MemorySafeLinkedBlockingQueue(Collection<? extends E> c, int maxFreeMemory)

Method Summary

Modifier and Type	Method	Description
long	getMaxFreeMemory()	get the max free memory.
boolean	hasRemainedMemory()	determine if there is any remaining free memory.
boolean	offer(E e)
boolean	offer(E e, long timeout, TimeUnit unit)
void	put(E e)
void	setMaxFreeMemory(int maxFreeMemory)	set the max free memory.
void	setRejector(Rejector<E> rejector)	set the rejector.

Methods inherited from class java.util.concurrent.LinkedBlockingQueue

clear, contains, drainTo, drainTo, forEach, iterator, peek, poll, poll, remainingCapacity, remove, removeAll, removeIf, retainAll, size, spliterator, take, toArray, toArray, toString

Methods inherited from class java.util.AbstractQueue

add, addAll, element, remove

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.concurrent.BlockingQueue

add

Methods inherited from interface java.util.Collection

addAll, containsAll, equals, hashCode, isEmpty, parallelStream, stream, toArray

Methods inherited from interface java.util.Queue

element, remove

Field Details

THE_256_MB

public static int THE_256_MB

Constructor Details

MemorySafeLinkedBlockingQueue

public MemorySafeLinkedBlockingQueue()

MemorySafeLinkedBlockingQueue

public MemorySafeLinkedBlockingQueue(long maxFreeMemory)

MemorySafeLinkedBlockingQueue

public MemorySafeLinkedBlockingQueue(Collection<? extends E> c,
 int maxFreeMemory)

Method Details

setMaxFreeMemory

public void setMaxFreeMemory(int maxFreeMemory)

set the max free memory.

Parameters:

maxFreeMemory - the max free memory

getMaxFreeMemory

public long getMaxFreeMemory()

get the max free memory.

Returns:

the max free memory limit

setRejector

public void setRejector(Rejector<E> rejector)

set the rejector.

Parameters:

rejector - the rejector

hasRemainedMemory

public boolean hasRemainedMemory()

determine if there is any remaining free memory.

Returns:

true if has free memory

put

public void put(E e)
         throws InterruptedException

Specified by:

put in interface BlockingQueue<E>

Overrides:

put in class LinkedBlockingQueue<E>

Throws:

InterruptedException

offer

public boolean offer(E e,
 long timeout,
 TimeUnit unit)
              throws InterruptedException

Specified by:

offer in interface BlockingQueue<E>

Overrides:

offer in class LinkedBlockingQueue<E>

Throws:

InterruptedException

offer

public boolean offer(E e)

Specified by:

offer in interface BlockingQueue<E>

Specified by:

offer in interface Queue<E>

Overrides:

offer in class LinkedBlockingQueue<E>