ramc 01/03/18 22:16:00
Added: src/java/org/apache/avalon/util
SynchronizedPriorityQueue.java
Log:
Thread safe version of PriorityQueue. Provides synchronized wrapper methods for all
the methods in the PriorityQueue interface.
Revision Changes Path
1.1
jakarta-avalon/src/java/org/apache/avalon/util/SynchronizedPriorityQueue.java
Index: SynchronizedPriorityQueue.java
===================================================================
/*
* Copyright (C) The Apache Software Foundation. All rights reserved.
*
* This software is published under the terms of the Apache Software License
* version 1.1, a copy of which has been included with this distribution in
* the LICENSE file.
*/
package org.apache.avalon.util;
import java.util.NoSuchElementException;
/**
* A thread safe version of the PriorityQueue.
* Provides synchronized wrapper methods for all the methods
* defined in the PriorityQueue interface.
*
* @author <a href="mailto:[EMAIL PROTECTED]">Ram Chidambaram</a>
*/
public final class SynchronizedPriorityQueue
implements PriorityQueue
{
protected final PriorityQueue m_priorityQueue;
public SynchronizedPriorityQueue( final PriorityQueue priorityQueue )
{
m_priorityQueue = priorityQueue;
}
/**
* Clear all elements from queue.
*/
public synchronized void clear()
{
m_priorityQueue.clear();
}
/**
* Test if queue is empty.
*
* @return true if queue is empty else false.
*/
public synchronized boolean isEmpty()
{
return m_priorityQueue.isEmpty();
}
/**
* Insert an element into queue.
*
* @param element the element to be inserted
*/
public synchronized void insert( final Comparable element )
{
m_priorityQueue.insert( element );
}
/**
* Return element on top of heap but don't remove it.
*
* @return the element at top of heap
* @exception NoSuchElementException if isEmpty() == true
*/
public synchronized Comparable peek() throws NoSuchElementException
{
return m_priorityQueue.peek();
}
/**
* Return element on top of heap and remove it.
*
* @return the element at top of heap
* @exception NoSuchElementException if isEmpty() == true
*/
public synchronized Comparable pop() throws NoSuchElementException
{
return m_priorityQueue.pop();
}
public String toString()
{
return m_priorityQueue.toString();
}
}
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