com.ziclix.python.sql.util

Class Queue

java.lang.Object

com.ziclix.python.sql.util.Queue

public class Queue
extends java.lang.Object

This queue blocks until closed or an element is enqueued. If the queue reaches capacity, the dequeue thread gets priority in order to bring the queue size under a certain threshold.

Field Summary

Fields

Modifier and Type	Field and Description
protected int	capacity Field capacity, threshold
protected boolean	closed Field closed
protected java.util.LinkedList<java.lang.Object>	queue Field queue
protected int	threshold Field capacity, threshold

Constructor Summary

Constructors

Constructor and Description
Queue() Instantiate a blocking queue with no bounded capacity.
Queue(int capacity) Instantiate a blocking queue with the specified capacity.

Method Summary

Modifier and Type	Method and Description
void	close() Close the queue and notify all waiting Threads.
java.lang.Object	dequeue() Blocks until an object is dequeued or the queue is closed.
void	enqueue(java.lang.Object element) Enqueue an object and notify all waiting Threads.

Methods inherited from class java.lang.Object

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

Field Detail

closed

protected boolean closed

Field closed

queue

protected java.util.LinkedList<java.lang.Object> queue

Field queue

capacity

protected int capacity

Field capacity, threshold

threshold

protected int threshold

Field capacity, threshold

Constructor Detail

Queue

public Queue()

Instantiate a blocking queue with no bounded capacity.

Queue

public Queue(int capacity)

Instantiate a blocking queue with the specified capacity.

Method Detail

enqueue

public void enqueue(java.lang.Object element)
             throws java.lang.InterruptedException

Enqueue an object and notify all waiting Threads.

Throws:

java.lang.InterruptedException

dequeue

public java.lang.Object dequeue()
                         throws java.lang.InterruptedException

Blocks until an object is dequeued or the queue is closed.

Throws:

java.lang.InterruptedException

close

public void close()

Close the queue and notify all waiting Threads.