org.mapdb

Class Queues.SimpleQueue<E>

java.lang.Object

org.mapdb.Queues.SimpleQueue<E>

All Implemented Interfaces:

java.lang.Iterable<E>, java.util.Collection<E>, java.util.concurrent.BlockingQueue<E>, java.util.Queue<E>

Direct Known Subclasses:

Queues.CircularQueue, Queues.Queue, Queues.Stack

Enclosing class:

Queues

public abstract static class Queues.SimpleQueue<E>
extends java.lang.Object
implements java.util.concurrent.BlockingQueue<E>

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected static class	Queues.SimpleQueue.Node<E>
protected static class	Queues.SimpleQueue.NodeSerializer<E>

Field Summary

Fields

Modifier and Type	Field and Description
protected Engine	engine
protected Atomic.Long	head
protected java.util.concurrent.locks.ReentrantLock[]	locks
protected Serializer<Queues.SimpleQueue.Node<E>>	nodeSerializer
protected Serializer<E>	serializer
protected static int	TICK
protected boolean	useLocks

Constructor Summary

Constructors

Constructor and Description
SimpleQueue(Engine engine, Serializer<E> serializer, long headRecidRef, boolean useLocks)

Method Summary

Modifier and Type	Method and Description
boolean	addAll(java.util.Collection<? extends E> c)
void	clear()
void	close() Closes underlying storage and releases all resources.
boolean	contains(java.lang.Object o)
boolean	containsAll(java.util.Collection<?> c)
int	drainTo(java.util.Collection<? super E> c)
int	drainTo(java.util.Collection<? super E> c, int maxElements)
E	element()
boolean	isEmpty()
java.util.Iterator<E>	iterator()
boolean	offer(E e)
boolean	offer(E e, long timeout, java.util.concurrent.TimeUnit unit)
E	peek()
E	poll()
E	poll(long timeout, java.util.concurrent.TimeUnit unit)
void	put(E e)
int	remainingCapacity()
E	remove()
boolean	remove(java.lang.Object o)
boolean	removeAll(java.util.Collection<?> c)
boolean	retainAll(java.util.Collection<?> c)
int	size()
E	take()
java.lang.Object[]	toArray()
<T> T[]	toArray(T[] a)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.concurrent.BlockingQueue

add

Methods inherited from interface java.util.Collection

equals, hashCode, parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable

forEach

Field Detail

useLocks

protected final boolean useLocks

locks

protected final java.util.concurrent.locks.ReentrantLock[] locks

TICK

protected static final int TICK

See Also:

Constant Field Values

engine

protected final Engine engine

serializer

protected final Serializer<E> serializer

head

protected final Atomic.Long head

nodeSerializer

protected final Serializer<Queues.SimpleQueue.Node<E>> nodeSerializer

Constructor Detail

SimpleQueue

public SimpleQueue(Engine engine,
                   Serializer<E> serializer,
                   long headRecidRef,
                   boolean useLocks)

Method Detail

close

public void close()

Closes underlying storage and releases all resources. Used mostly with temporary collections where engine is not accessible.

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>

clear

public void clear()

Specified by:

clear in interface java.util.Collection<E>

remove

public E remove()

Specified by:

remove in interface java.util.Queue<E>

element

public E element()

Specified by:

element in interface java.util.Queue<E>

offer

public boolean offer(E e)

Specified by:

offer in interface java.util.concurrent.BlockingQueue<E>

Specified by:

offer in interface java.util.Queue<E>

put

public void put(E e)
         throws java.lang.InterruptedException

Specified by:

put in interface java.util.concurrent.BlockingQueue<E>

Throws:

java.lang.InterruptedException

offer

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

Specified by:

offer in interface java.util.concurrent.BlockingQueue<E>

Throws:

java.lang.InterruptedException

take

public E take()
       throws java.lang.InterruptedException

Specified by:

take in interface java.util.concurrent.BlockingQueue<E>

Throws:

java.lang.InterruptedException

poll

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

Specified by:

poll in interface java.util.concurrent.BlockingQueue<E>

Throws:

java.lang.InterruptedException

drainTo

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

Specified by:

drainTo in interface java.util.concurrent.BlockingQueue<E>

drainTo

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

Specified by:

drainTo in interface java.util.concurrent.BlockingQueue<E>

remainingCapacity

public int remainingCapacity()

Specified by:

remainingCapacity in interface java.util.concurrent.BlockingQueue<E>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Collection<E>

size

public int size()

Specified by:

size in interface java.util.Collection<E>

contains

public boolean contains(java.lang.Object o)

Specified by:

contains in interface java.util.Collection<E>

Specified by:

contains in interface java.util.concurrent.BlockingQueue<E>

iterator

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

Specified by:

iterator in interface java.lang.Iterable<E>

Specified by:

iterator in interface java.util.Collection<E>

toArray

public java.lang.Object[] toArray()

Specified by:

toArray in interface java.util.Collection<E>

toArray

public <T> T[] toArray(T[] a)

Specified by:

toArray in interface java.util.Collection<E>

remove

public boolean remove(java.lang.Object o)

Specified by:

remove in interface java.util.Collection<E>

Specified by:

remove in interface java.util.concurrent.BlockingQueue<E>

containsAll

public boolean containsAll(java.util.Collection<?> c)

Specified by:

containsAll in interface java.util.Collection<E>

addAll

public boolean addAll(java.util.Collection<? extends E> c)

Specified by:

addAll in interface java.util.Collection<E>

removeAll

public boolean removeAll(java.util.Collection<?> c)

Specified by:

removeAll in interface java.util.Collection<E>

retainAll

public boolean retainAll(java.util.Collection<?> c)

Specified by:

retainAll in interface java.util.Collection<E>