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Commons Collections example source code file (SynchronizedBuffer.java)

This example Commons Collections source code file (SynchronizedBuffer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Collections tags/keywords

buffer, buffer, object, object, synchronizedbuffer, synchronizedbuffer, synchronizedcollection, synchronizedcollection

The Commons Collections SynchronizedBuffer.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.commons.collections.buffer;

import org.apache.commons.collections.Buffer;
import org.apache.commons.collections.collection.SynchronizedCollection;

/**
 * Decorates another <code>Buffer to synchronize its behaviour
 * for a multi-threaded environment.
 * <p>
 * Methods are synchronized, then forwarded to the decorated buffer.
 * <p>
 * This class is Serializable from Commons Collections 3.1.
 *
 * @since Commons Collections 3.0
 * @version $Revision: 646777 $ $Date: 2008-04-10 13:33:15 +0100 (Thu, 10 Apr 2008) $
 * 
 * @author Stephen Colebourne
 */
public class SynchronizedBuffer extends SynchronizedCollection implements Buffer {

    /** Serialization version */
    private static final long serialVersionUID = -6859936183953626253L;

    /**
     * Factory method to create a synchronized buffer.
     * 
     * @param buffer  the buffer to decorate, must not be null
     * @return a new synchronized Buffer
     * @throws IllegalArgumentException if buffer is null
     */
    public static Buffer decorate(Buffer buffer) {
        return new SynchronizedBuffer(buffer);
    }
    
    //-----------------------------------------------------------------------
    /**
     * Constructor that wraps (not copies).
     * 
     * @param buffer  the buffer to decorate, must not be null
     * @throws IllegalArgumentException if the buffer is null
     */
    protected SynchronizedBuffer(Buffer buffer) {
        super(buffer);
    }

    /**
     * Constructor that wraps (not copies).
     * 
     * @param buffer  the buffer to decorate, must not be null
     * @param lock  the lock object to use, must not be null
     * @throws IllegalArgumentException if the buffer is null
     */
    protected SynchronizedBuffer(Buffer buffer, Object lock) {
        super(buffer, lock);
    }

    /**
     * Gets the buffer being decorated.
     * 
     * @return the decorated buffer
     */
    protected Buffer getBuffer() {
        return (Buffer) collection;
    }

    //-----------------------------------------------------------------------
    public Object get() {
        synchronized (lock) {
            return getBuffer().get();
        }
    }

    public Object remove() {
        synchronized (lock) {
            return getBuffer().remove();
        }
    }
    
}

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